Abstract: Hybrid agents for enhancing in vivo diagnostic imaging of body organs and tissues, and methods of preparing and using the same.

Abstract: A tetravalent metal diphosphonate-phosphite composition definable by the following general formula:M(O.sub.3 P--R--PO.sub.3).sub.1-x (HPO.sub.3).sub.2x (I)is described where:M is a tetravalent metal;x varies from 0.5 to 0.66;R is an organic radical of bivalent aromatic type, carrying side groups which increase its steric hindrance.The composition is in the form of a crystalline solid with a type .alpha. layered structure with the diphosphonic groups positioned to join said layers together by a covalent bond (pillared compounds). It has a B.E.T. surface area from 300 to 500 m.sup.2 /g depending on the nature of R in formula (I), and a porosity in the micropore radius range of less than 20 .ANG. (Angstrom), such micropores contributing to the extent of more than 95% of the total area for the most crystalline materials.

Abstract: The novel metallocenes of the formula I ##STR1## in which, preferably, M.sup.1 is Zr or Hf, R.sup.1 and R.sup.2 are alkyl or halogen, R.sup.3 and R.sup.4 are hydrogen, R.sup.5 and R.sup.6 are alkyl or haloalkyl, --(CR.sup.8 R.sup.9).sub.m --R.sup.7 --(CR.sup.8 R.sup.9).sub.n -- is a single- or multi-membered chain in which R.sup.7 may also be a (substituted) hetero atom, m+n is zero or 1, and R.sup.10 is hydrogen, form, together with aluminoxanes as cocatalysts, a very effective catalyst system for the preparation of polyolefins of high stereospecificity and high melting point.

Abstract: An alkali metal sulfonate-substituted binaphthyl-phosphine transition metal complex is disclosed, which is represented by formula (I)[M(X).sub.n (Q)(SO.sub.3 A-BINAP)]Y (I)whereinM represents a transition metal atom;SO.sub.3 A-BINAP represents a tertiary phosphine represented by formula (II) ##STR1## in which A represents an alkali metal atom; X represents a chlorine atom, a bromine atom, or an iodine atom;when n is 1, M represents ruthenium, Q represents benzene or p-cymene, and Y represents a chlorine atom, a bromine atom, or an iodine atom;when n is 0 and M is iridium or rhodium, Q represents 1,5-cyclo-octadiene or norbornadiene, and Y represents ClO.sub.4, PF.sub.6 or BF.sub.4 ; andwhen n is 0 and M is palladium, Q represents .pi.-allyl, and Y represents ClO.sub.4, PF.sub.6, or BF.sub.4.

Abstract: Platinum complexes of the general formula I[(R.sup.1 NH.sub.2).sub.n Pt].sub.q Y.sub.m X.sub.p (I)in which Y is a phosphonic acid ligand, and the preparation thereof, are described. The platinum complexes are suitable as active substances in pharmaceuticals, in particular for controlling cancers.

Abstract: This invention provides novel compositions comprising aryl phosphonic or phosphinic acids substituted with more than one sulfo radical. These novel compounds may be reacted with tetravalent metal ions to provide polymers having an inorganic backbone, which polymers are useful as acid catalysts.

Abstract: New complexes of general formula (I) in whichR.sub.1 and R.sub.2 together form a saturated or unsaturated polycyclic carbocyclic radical containing 7 to 12 carbon atoms, or a saturated or partially saturated mono-, bi- or tricyclic heterocyclic radical containing 5 to 11 chain members and a hetero-atom chosen from oxygen, sulphur or nitrogen, which latter atom can optionally be substituted by an alkoxycarbonyl radical, and,X.sub.1 and X.sub.2 represent chlorine atoms or together formeither a radical of structure: ##STR1## in which n is 0 to 2 and R.sub.6 and R.sub.7, which are identical or different, are hydrogen atoms or, when n=1, can be alkyl radicals or form, together with the carbon atom to which they are attached, a cyclobutyl radical,or a radical of structure: ##STR2## in which n, R.sub.6 and R.sub.7 are defined as above, or their salts where such exist, and their hydrates, their preparation and the pharmaceutical compositions which contain them.

Abstract: Preparation of ethylene copolymers from ethylene and polar and/or non-polar comonomers in the presence of selected nickel-containing catalysts.

Abstract: The present invention discloses a compound comprising a diphosphonate/phosphite of a tetravalent metal:M[(O.sub.3 P--R--PO.sub.3).sub.1-(x+y) (HPO.sub.3).sub.2X (O.sub.3 P--R--PO.sub.3 H.sub.2).sub.2y ](where M, R, x and y have the meaning given in the description), in the form of a crystalline solid with an alpha-type lamellar structure with a distance between layers of 7.4 to 20.ANG. (depending on the dimensions of radical R), a BET surface area of 250 to 400m.sup.2 /g, and porosity within the mesopore range, with at least 50% of the pores measuring 20 to 30.ANG.. The compound, depending on the radical R used, may or may not have microporosity in the region between layers. Such a diphosphonate/phosphite of a tetravalent metal is obtained by reaction between diphosphonic acid, phosphorous acid and an oxyhalide of a tetravalent metal, in a solvent comprising dimethyl-sulphoxide/water containing hydrofluoric acid.

Abstract: In a process for the production of thin films and epitaxial layers by gas-phase deposition, intramolecularly stabilized organometallic compounds are employed as a source of metal.

Abstract: The present invention relates to improved flotation composition comprising a mixture of (A) at least one metal salt of a phosphorus acid represented by the Formula: ##STR1## wherein each R.sub.1 is independently a hydrocarbyl, hydrocarbyloxy of hydrocarbylthio group having from 1 to about 18 carbon atoms, each X is independently oxygen or sulfur, and the lowest oxidation state of the metal is plus two, and (B) at least one dithiocarbamate represented by the formula: ##STR2## wherein each R.sub.2 is independently hydrogen, a hydrocarbyl group having from 1 to about 18 carbon atoms, or R.sub.2 taken together with R.sub.3 and the nitrogen atom form a five, six or seven member heterocyclic group; each R.sub.3 is independently a hydrocarbyl group having from 1 to about 18 carbon atoms, or R.sub.3 taken together with R.sub.2 and the nitrogen atom form a five, six or seven member heterocyclic group; and R.sub.4 is a hydrocarbylene group having from 1 to about 10 carbon atoms.

Abstract: The novel metallocenes of the formula I ##STR1## in which, preferably, M.sup.1 is Zr or Hf, R.sup.1 and R.sup.2 are alkyl or halogen, R.sup.3 and R.sup.4 are hydrogen, R.sup.5 and R.sup.6 are alkyl or haloalkyl, --(CR.sup.8 R.sup.9).sub.m --R.sup.7 --(CR.sup.8 R.sup.9).sub.n -- is a single- or multi-membered chain in which R.sup.7 may also be a (substituted) hetero atom, and m+n is zero or 1, form, together with aluminoxanes as cocatalysts, a very effective catalyst system for the preparation of polyolefins of high molecular weight.

Abstract: Compounds of general formula I or Ia ##STR1## or mixtures thereof, wherein the groups P-L-P are a ligand from the group comprising diphosphine and diphosphinite, in which the secondary phosphine groups or phosphinite groups P are coupled via 2 to 4 C atoms, and which form a 5-, 6- or 7-membered ring with the Ir atoms, X, X.sup.1, X.sup.2, X.sup.3, X.sup.4, X.sup.5 and X.sup.6 independently of the others are Cl, Br or I, or X.sup.1 and X.sup.6 and H and X.sup.2, X.sup.3, X.sup.4 and X.sup.5 independently of the others are Cl, Br or I, or X.sup.1 and X.sup.5 and H and X.sup.2, X.sup.3, X.sup.4 and X.sup.6 independently of the others are Cl, Br or I, and M.sup..sym. is an alkali metal cation or quaternary ammonium. The compounds are suitable as homogeneous catalysts for the (preferably) asymmetric hydrogenation of N-substituted imines to secondary amines.

Abstract: A catalyst for addition polymerization comprising(a) an (initiator) first component comprising a plurality of atoms M as hereinafter defined, each in a moiety of formula (I):MX(Y.sub.n)Z.sub.p (I)whereinM is Si, Ge or Snn is 0 or an integer, and p is an integer such that (n+p)=3;X is a diradical ##STR1## bound via Q to M whereQ is N, P, As or P(=T)G.D where T is O or S and G and D are each independently a bond, O or S,R.sup.1 is optionally substituted hydrocarbyl, or, when Q is P, M(Y.sub.n)Z.sub.p as herein defined,R.sup.2 is optionally substituted hydrocarbadiyl, orR.sup.1 and R.sup.2 together are hydrocarbatriyl,all such R.sup.1 and R.sup.2 being inert in the conditions of the process of the present invention; andR.sup.2 being linked directly or indirectly to any group as defined for X, or an organic radical comprising further moieties of formula (I), or one or more M(Y.sub.

Abstract: A catalyst for addition polymerization comprising:(a) an (initiator) first component of Formula (I):MX(Y.sub.n)Z.sub.p (I)whereinM is Si, Ge or Sn;n is O or an integer, and p is an integer such that (n+p)=3;X is a radical ##STR1## where Q and Q.sup.1 are each independently N, P or As;Q.sup.2 is O, S, NR or PR where R is C.sub.1-4 alkyl;R.sup.1 is H or optionally substituted hydrocarbyl; andR.sup.2 and R.sup.3 are each independently optionally substituted hydrocarbyl, or R.sup.2 and R.sup.3 together are optionally substituted aliphatic hydrocarbadiyl;all such R.sup.1, R.sup.2 and R.sup.3 being inert in the process conditions of the present invention;Y is A or OA where A is optionally substituted hydrocarbyl inert in the process conditions of the present invention, or trialkylsilylalkyl; andZ is independently any group as definedd for Y, or an organic polymer radical comprising further MXY.sub.n moieties; orp is 2 andZ.sub.2 is a group Z.sup.1 .sub.2 of the formula --OSiR.sup.5 R.sup.8 O-- where R.sup.5, R.sup.

Abstract: A process for the preparation of .mu.-3-carbopentazane-N.sup.1, N.sup.4 :N.sup.2, N.sup.5 -bis-[bis(triphenylphosphine)rhodium (I)] dinitrate by the reaction of tris(triphenylphosphine)nitratorhodium (I) with hydrazine in degassed methanol under an inert atmosphere.

Abstract: Layered divalent metal pentavalent metallate, M(HAO.sub.4).sub.x (RAO.sub.3).sub.y (Z).sub.z wherein M is divalent metal, A is a pentavalent metal, e.g. phosphorus, R is a substituent group other than H or OH, e.g., phenyl, covalently bonded to A, x+y=1, y is greater than 0, z ranges from 0 to 2, inclusive, and Z is an intercalated moiety is prepared by contacting a source of divalent metal with a substituted phosphonic acid-type compound under hydrothermal conditions.

Abstract: Preparation of the novel monomeric compounds of the formula (t-Bu).sub.2 ME(t-Bu).sub.2, where M is Ga, Al, or In and E is As, P, Sb, or N, by reaction of (t-Bu).sub.2 MCl and LiE(t-Bu).sub.2. The resulting product (t-Bu).sub.2 ME(t-Bu).sub.2 can be pyrolyzed to form crystalline films of the metallic material, ME.

Abstract: A monocyclopentadienyl or substituted monocyclopentadienyl metal complex containing compound useful as a polymerization catalyst corresponding to the formula:CpMX.sub.n.sup.+ A.sup.-wherein:Cp is a single .eta..sup.5 -cyclopentadienyl or .eta..sup.5 -substituted cyclopentadienyl group optionally covalently bonded to M through a substituent;M is a metal of Group 3-10 or the Lanthanide Series of the Periodic Table bound in the .eta..sup.5 bonding mode to the cyclopentadienyl or substituted cyclopentadienyl group;X each occurrence independently is selected from the group consisting of hydride, halo, alkyl, aryl, silyl, germyl, aryloxy, alkoxy, amide, siloxy, neutral Lewis base ligands and combinations thereof having up to 20 non-hydrogen atoms, and optionally one X together with Cp forms a metallocycle with M;R is alkyl or aryl of up to 10 carbons;n is one or two depending on the valence of M; andA is a noncoordinating, compatible anion of a Bronsted acid salt.

Abstract: New complexes of the elements of Groups VIIA, VIIIA, and IB of the Periodic Table* with the trisodium salt of tris(m-sulfophenyl)phosphane as a complex ligand. The complexes are used as catalysts for hydrogenations for the water gas reactions, hydrocarbonyls, hydroformylations, oxidations, carbon-carbon cross-linking reactions (e.g. allene/alkine coupling), and additions of secondary amines to carbon-carbon double bonds.*according to the IUPAC version.

Abstract: The present invention involves chemical compounds particularly useful for the preparation of thin films or layers of group 3/group 5 materials by MOCVD and other techniques. Such compounds may be represented as having the formulas [M(ER'R").sub.3 ].sub.n or [RM(ER'R").sub.2 ].sub.n or [R.sub.2 M(ER'R")].sub.n wherein M is aluminum, gallium or indium; E is phosphorus, arsenic or antimony; R, R', and R" are one or more of hydrogen, alkyl, aryl, alkyl-substituted aryl, cyclic alkyl, halide or other anionic group; and n is between about 1 and about 6.

Abstract: A solid composition of matter comprising heteropolyoxo vanadium oxide compounds of the general formula: (R'.sub.4 N).sub.x H.sub.y (VO.sub.b).sub.a (RQO.sub.3).sub.-- nH.sub.2 O) wherein (VO.sub.b).sub.a (RQO.sub.3) is a molecular anion; R' is a substituted or unsubstituted monovalent organic group covalently bound to nitrogen to form a tetraorgano ammonium cation (R'.sub.4 N); R is a substituted or unsubstituted monovalent organic group covalently bound to Q to form an organophosphorus or organoarsenous group; R and R' are selected from the group consisting of C.sub.1 -C.sub.20 alkyl, aryl, hetero alkyl, hetero aryl or mixtures thereof; Q is a phosphorus or arsenic atom; a is about 1.0 to about 3.0; b is about 1.0 to about 2.0; (x+y) are determined by the vanadium oxidation state (m) where (x+y) equals (2ab+2)-ma and where (x+y) and x can not equal zero; and n is zero or a positive number.

Abstract: Cyclopentadienyl compounds of aluminum, gallium and indium which when reacted at low temperature with amines, phosphines and arsines form compounds which are potential precursors to ceramic materials and semiconductors.

Abstract: A coordination compound useful as a hydrogenation catalyst, having the formula: ##STR1## wherein Ph is phenyl; R is hydrogen or C.sub.1 -C.sub.4 alkyl; and X is chloro, bromo or iodo. This compound is particularly useful as a homogeneous hydrogenation catalyst in the production of alpha-6-deoxytetracyclines, particularly the antibiotic doxycycline. The desired alpha-6-deoxy product is produced in high yields and stereospecificities, the process requiring the use of minimal quantities of rhodium metal in the hydrogenation catalyst per mole of the 6-methylenetetracycline hydrogenated.

Abstract: The present invention provides a process for producing a metal or metalloid salt of methyl methy phosphonic acid which comprises reacting, under non-aqueous conditions, dimethyl methylphosphonate with a finely divided form of an oxide or hydroxide of one or more metals or metalloids from group IIA, IIB, IIIA, IVA, IVB, VA, VIB, VIIB or VIII of the Periodic Chart of Elements, at an elevated temperature.

Abstract: Layered divalent metal pentavalent metallate, M(HAO.sub.4).sub.x (RAO.sub.3).sub.y (Z).sub.z wherein M is divalent metal, A is a pentavalent metal, e.g. phosphorus, R is a substituent group other than H or OH, e.g., phenyl, covalently bonded to A, x+y=1, y is greater than O, z ranges from 0 to 2, inclusive, and Z is an intercalated moiety is prepared by contacting a source of divalent metal with a substituted phosphonic acid-type compound under hydrothermal conditions.

Abstract: New chemical product, constituted by an organic phosphorus compound of the structure ##STR1## where Q is an N or O atom, T is an alkylene or arylene, possibly carrying substituents, or not existing, while R.sup.1 to R.sup.7, the same or different, are H or aliphatic, cycloaliphatic and/or arylic hydrocarbon radicals, possibly substituted, R.sup.3 not existing when Q is oxygen.This product is used as an intermediate in the preparation of different derivatives of phosphinous acid.

Abstract: The present invention provides a method of making a polymer by reacting, in the absence of water, an organic compound having the general formula R-H wherein R represents an organo radical having at least one unsaturated carbon-carbon bond and H is covalently bonded to one of said carbons, with PX.sub.3, wherein X is a halide radical, and zirconium ions to yield a reaction product and oxidizing and hydrolyzing such reaction product to yield a polymer represented by the general formula Zr(O.sub.3 PR).sub.n wherein n varies from about 1 to about 2.5. R may comprise sulfonic acid groups or may comprise sulfonatable site for sulfonation during the oxidation step. In either case, the resulting product is useful as an acid catalyst.

Abstract: Metal salts of phosphoric and phosphonic acid esters of formula ##STR1## wherein R is C.sub.1 -C.sub.4 alkoxy or straight chain or branched unsubstituted C.sub.1 -C.sub.20 alkyl or C.sub.2 -C.sub.6 alkenyl,R.sub.1 is hydrogen or C.sub.1 -C.sub.4 alkyl,X is a metal cation, andn is an integer from 1 to 3 corresponding to the valence of X,are prepared by reacting n moles of a phosphoric or phosphonic acid or an ester thereof, of formula ##STR2## wherein R, R.sub.1 and n are as defined above, with 1 mole of a metal X.sup.n, if desired with cooling. These salts can be used, for example, as flame retardants, fertilizers or emulsifiers for aqueous plastics dispersions.

Abstract: Preparation of ethylene copolymers from ethylene and polar and/or non-polar comonomers in the presence of selected nickel-containing catalysts.

Abstract: Certain novel heavy metal salts of dithiophosphonate derivatives, particularly monoesters, may be prepared inexpensively from hindered phenol compounds and are useful as anti-oxidants for example in lubricants and/or polymer materials.

Abstract: New chiral catalysts for asymmetric synthesis reactions. The catalysts induce chirality in desired fashion in product molecules. The catalysts are rigid quadruped or triped ligands which provide a rigid asymmetric enantio-face at the active catalyst cite, thus inducing preparation of enantiomer molecules.

Abstract: A hydroformylation process including contacting hydroformylation stock in a reaction zone at a temperature of from about 20.degree. C. to about 250.degree. C. and a pressure of from about 15 psig to about 800 psig with hydrogen and carbon monoxide wherein the catalyst comprises rhodium in chemical complex with one or more ligands of the formulae ##STR1## wherein: Z, when present, represents the atoms necessary to form with adjacent carbons on the benzene nucleus a fused divalent ring structure having up to about 20 ring carbons;each ring is either unsubstituted or one or more of the hydrogens thereof is replaced with a substituent R selected independently from alkyl, alkoxy, aryloxy, aryl, aralkyl, alkaryl, alkoxyalkyl, cycloaliphatic, halogen, alkanoyl, alkanoyloxy, alkoxycarbonyl, carboxyl or cyano;each R.sub.1 and R.sub.

Abstract: A homogeneous liquid composition for use in air freshening devices comprising 3 to 15% of dimethyl methylphosphonate, 1 to 12% of fragrance, 40 to 65% of organic solvent and 15 to 50% of water (where percentages are percentage by weight of the total composition). The composition is non-flammable in use.

Abstract: The present invention relates to a class of compositions and a method for NMR imaging using an NMR signal affecting amount of a paramagnetic, diamagnetic or ferromagnetic metal ion chelated with an organo phosphorous compound.Gadolinium bis(bis-dihydroxyphosphonylmethylphosphinate) is an example of such a composition.

Abstract: This invention relates to neutral complexes of dithioacid vanadium sulfide dimer and to a method of producing the complexes. The 1,1-dithioacid may be a dithiocarbamate, xanthate, dithiophosphate, dithiophosphinate or other similar ligand. The structure is generally of the form ##STR1## where L is a 1,1-dithioacid. The preferred dithioacid is dithiocarbamate. The compositions are suitable for producing hydrotreating catalysts or as a lubricant additive.

Abstract: Compounds of the formula ##STR1## wherein X is various amino or imino acids and esters are disclosed. These compounds are useful as anti-hypertensive agents due to their angiotensin converting enzyme inhibition activity and depending upon the definition of X may also be useful as analgesics due to their enkephalinase inhibition activity.

Abstract: An esterfication process particularly for the preparation of polyesters and polymeric esters wherein aliphatic or aromatic carboxylic acids are reacted with appropriate alcohols in the presence of catalytic amounts of calcium bis[monoethyl(3,5-di-tert-butyl-4-hydroxybenzyl) phosphonate], the presence of said phosphonate serving to reduce the time necessary for complete esterification and to provide esters with increased oxidation stability and better color.

Abstract: N-phosphonomethylglycine and novel derivative thereof useful as phytotoxicants or herbicides.

Abstract: Olefins such as ethylene can be polymerized with a catalyst which comprises nickel compounds obtained by reacting a nickel-(O) compound or a nickel compound which may be converted in situ into a nickel-(O) compound with an adduct or a mixture of a quinoid compound and a tertiary phosphine and with a compound corresponding to the following general formula: ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 independently represent C.sub.1 -C.sub.20 alkyl, C.sub.2 -C.sub.20 alkenyl, C.sub.6 -C.sub.12 aryl or C.sub.3 -C.sub.8 cycloalkyl optionally substituted by halogen, hydroxy, C.sub.1 -C.sub.20 alkoxy, nitro or C.sub.6 -C.sub.12 aryloxy; also C.sub.6 -C.sub.12 aryl-C.sub.1 -C.sub.20 alkyl, C.sub.6 -C.sub.12 aryl-C.sub.2 -C.sub.20 alkenyl, C.sub.1 -C.sub.20 alkyl-C.sub.6 -C.sub.12 aryl, C.sub.1 -C.sub.20 alkyl-C.sub.3 -C.sub.8 cycloalkyl and C.sub.6 -C.sub.12 aryl-C.sub.3 -C.sub.8 cycloalkyl, di-C.sub.1 -C.sub.4 alkylamino, optionally substituted phenoxy or alkoxy; R.sup.4, R.sup.5 and R.sup.

Abstract: A compound of the formula: ##STR1## wherein X is a chlorine atom or a bromine atom, or its salt, which is useful as a fungicide.

Abstract: Novel platinum(II) complexes of 1,2-diaminocyclohexane, 1-aminomethylcyclooctylamine and 1,2-diamino-2,4-dimethylpentane are provided. Such complexes are of use in inhibiting the growth of certain mammalian tumors.

Abstract: Bis-platinum complexes having the formula ##STR1## wherein A is a ligand having two pairs of platinum-coordinating acidic groups which are each independently a carboxylate, phenolate, sulfonate or phosphonate group, each said pair being capable of coordinating with a platinum ion to form a 5-10 membered chelate ring; Z is a water-solubilizing group; n is 0 or a positive integer, with the proviso that n is 0 only when at least one of said platinum-coordinating acidic groups is sulfonate or phosphonate or when at least one platinum ion is a Pt(IV) ion; and R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 are each independently H or a C.sub.1-20 alkyl, aryl, aralkyl, or alkaryl group, or together form one or more C.sub.1-30 alkylene, cycloalkylene, arylene, aralkylene or alkarylene groups; or a pharmaceutically acceptable salt thereof, are useful as readily water-soluble antitumor agents.

Abstract: Novel platinum(II) complexes of 1,2-diaminocyclohexane, 1-aminomethylcyclooctylamine and 1,2-diamino-2,4-dimethylpentane are provided. Such complexes are of use in inhibiting the growth of certain mammalian tumors.

Abstract: Tin compounds, a process for the preparation thereof, a process for the preparation of a medicine using such a tin compound for the treatment of malignant tumors in mice as well as the shaped medicine thus obtained.This invention relates to novel tin compounds, a pharmaceutical composition using the novel compounds and methods for treating cancer using the pharmaceutical composition.

Abstract: Novel linear polymers of ferrocene are prepared by the reaction of 1,1'-dilithioferrocene with controlled amounts of a dihaloorganylphosphine, arsine or stibine. The polymers form stable complexes with Group VIII metals which are useful as recoverable hydroformylation catalysts.

Abstract: Catalyst systems for the oligomerization and/or isomerization of olefins which comprise a nickel (II) complex and a co-catalyst. The nickel (II) complex is a square planar species with a trivalent Group V donor ligand, preferably a phosphine or phosphite ligand, a halogen or pseudo-halogen ligand and a bidentate dithio ligand, especially a substituted dithio-.beta.-diketone ligand.

Abstract: A process is provided for preparing nickel ylides which are themselves novel compounds defined by the following Formula I: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7 and R.sub.

Abstract: Novel zero valent nickel complex catalysts have been developed for hydrosilation reactions including the use of such zero valent nickel complexes as catalysts in place of platinum complexes for SiH Olefin compositions to produce silicone elastomers. These zero valent nickel complex catalysts appear to be most effective under anaerobic conditions.

Abstract: A cationic lipophilic complex of technetium is disclosed wherein all of the coordination positions of the technetium atom are filled with a neutral donor atom having a pair of electrons available for forming a coordinate bond with technetium. The donor atoms are provided by target-seeking ligands or salts thereof, said ligands having the following structure of one of formulas I, II or III. Such complexes are useful for imaging heart and hepatobiliary tissues.