Abstract: A ruthenium-containing metathesis catalyst system which contains a ruthenium compound (A), a phosphorus compound (B), and a compound (C) containing a carbon-to-carbon triple bond. The mole ratio of compounds A:B:C is typically in the range of about 1.0:0.01-100:0.01-100. The ruthenium compound (A) is a Ru(II), Ru(III), or Ru(IV) compound containing an anionic ligand (X) and optionally an arene ligand and optionally a phosphorus compound ligand. The phosphorus compound (B) is optional if the ruthenium compound (A) contains a phosphorus-containing ligand. The catalyst system is employed in processes to metathesize olefins, including ring-opening metathesis polymerization of cyclic olefins, metathesis of acyclic olefins, acyclic diene metathesis oligomerization or polymerization, cross-metathesis of cyclic and acyclic olefins, ring-closing metathesis, metathesis depolymerization of unsaturated polymers, and metathesis of functionalized olefins.

Abstract: Group 3-6 or Lanthanide metal complexes possessing two metal centers, catalysts derived therefrom by combining the same with strong Lewis acids, Bronsted acid salts, salts containing a cationic oxidizing agent or subjected to bulk electrolysis in the presence of compatible, inert non-coordinating anions and the use of such catalysts for polymerizing olefins, diolefins and/or acetylenically unsaturated monomers are disclosed.

Abstract: Salts of (polyfluoroaryl)fluoroanions of aluminum, gallium, and indium are described. The (polyfluoroaryl)fluoroanions have the formula [ER'R"R'"F].sup..crclbar. wherein E is aluminum, gallium, or indium, wherein F is fluorine, and wherein R', R", and R'" is each a fluorinated phenyl, fluorinated biphenyl, or fluorinated polycyclic group.

Abstract: A process for treating a composition containing a substantial proportion of trimethylolpropane bis-monolinear formal (TMP-BMLF) or trimethylolethane bis-monolinear formal (TME-BMLF), e.g., a heavy ends residue obtained from the purification of a crude trimethylolpropane (TMP) or trimethylolethane (TME) product, wherein the composition is contacted at an elevated temperature with a strong acid catalyst, e.g., methanesulfonic acid, to produce a composition containing significantly increased amounts of TMP and trimethylolpropane monocyclic formal (TMP-MCF) or TME and trimethylolethane monocyclic formal (TME-MCF) respectively.

Abstract: The synthesis of the organo-Lewis acid perfluorobiphenylborane (PBB) and the activation of metallocenes for the formation of a variety of highly active homogeneous Ziegler-Natta metallocene olefin polymerization, copolymerization and ring-opening polymerization catalysts is described.

Abstract: There is disclosed a method for synthesizing polyolefins having a silyl group at one terminus, the method comprising reacting a monomer of an a-olefin (C.ltoreq.3.ltoreq.10) and a tetrasubstituted silyl radical in the presence of a metallocene catalyst.

Abstract: There is disclosed a method for synthesizing polyolefins having a silyl group at one terminus, the method comprising reacting a monomer of an .alpha.-olefin (C.ltoreq.3.ltoreq.10) and a tetrasubstituted silyl radical in the presence of a metallocene catalyst.

Abstract: Bridged, group 4 Metal complexes useful as olefin polymerization catalyst components corresponding to the formula: L.sub.1 ZL.sub.2 MX.sub.m X'.sub.nor a dimer, solvated adduct, chelated derivative or mixture thereof, wherein:L.sub.1 is a partially saturated tricyclic group, especially octahydrofluorenyl,L.sub.2 is a substituted cyclopentadienyl group that is bound to M by means of delocalized .pi.-electrons, said cyclopentadienyl group being substituted at one and only one of its two distal positions with a bulky ligand group,Z is divalent bridging substituent,X each occurrence is a monovalent, anionic moiety having up to 40 non-hydrogen atoms, optionally, two X groups may be covalently bound together forming a divalent dianionic moiety having both valences bound to M, or, optionally 2 X groups may be covalently bound together to form a neutral, conjugated or nonconjugated diene that is bonded to M by means of delocalized .pi.

Abstract: One manner of construction of robust, thin film materials with large second-order optical nonlinearities is the covalent self-assembly of aligned arrays of high-.beta. molecular chromophores into multilayer superlattices. the dispersion of the large second harmonic generation (SHG) response in a self-assembled (SA) film containing stilbazolium chromophore building blocks is disclosed, as well as the fabrication of SHG waveguides with such materials.

Abstract: Aryloxyaluminoxanes containing the unit ##STR1## where R is unsubstituted or substituted aryl, such as phenyl or naphthyl, are useful as a cocatalysts in Ziegler-Natta and Kaminsky-type olefin polymerization catalysts. They can be formed by reaction of a source of water with an organoaluminum compound containing the desired aryloxy moiety or by reaction of preformed aluminoxane with an organic compound, such as a phenol, containing such a moiety.

Abstract: A cationic metallocene complex with trisperfluorobiphenyl borate for use as a polymerization catalyst.

Abstract: The subject invention involves a method of preparing and the constrained geometry catalyst thereby prepared of the general formula Ar'R4(O)Ar"R'.sub.4 M(CH.sub.2 Ph).sub.2 where Ar' is a phenyl or naphthyl group; Ar" is a cyclopentadienyl or indenyl group, R and R' are H or alkyl substituents (C.ltoreq.10) and M is Ti, Zr or Hf. The synthetic method involves a simple alkane elimination approach which permits a "one-pot" procedure. The catalyst, when combined with a cocatalyst such as Pb.sub.3 C.sup.+ B(Ar.sub.3.sup.F).sub.4 BAr.sub.3.sup.F or methyl alumoxane where Ar.sup.F is a fluoroaryl group, is an effective catalyst for the polymerization of .alpha.-olefins such as ethylene, propylene and styrene.

Abstract: A trityl perfluorophenyl alumninate such as tris(2,2',2"-nonafluorobiphenyl) fluoroaluminate (PBA.sup.-) and its role as a cocatalyst in metallocene-mediated olefin polymerization is disclosed.

Abstract: New organic light-emitting diodes and related electroluminescent devices and methods for fabrication, using siloxane self-assembly techniques.

Abstract: A new class of olefin dimerization catalysts and an efficient method for their preparation is disclosed. B (C.sub.6 F.sub.5).sub.3 reacts quantitatively with Group 4 metallocene type catalysts to yield highly reactive cationic complexes as follows:(L.sub.2 MR.sup.2).sup.+ X.sup.- whereL=R.sub.2 (C.sub.5 H.sub.3); R=CR'.sub.3 ; R.sup.2 =alkyl group (C=1.ltoreq.20);M=Ti, Zr, Hf;X.sup.- =RB(C.sub.6 F.sub.5).sub.3.sup.-, or methylalumoxane.These complexes are potent catalysts and may be used in the dimerization of .alpha.-olefins.

Abstract: A polymer having a repeating unit of ##STR1## and a method for preparing it through Zr-catalyzed polymerization of methylenecyclopropane is disclosed.

Abstract: There is disclosed a method for synthesizing polyolefins having a silyl group at one terminus, said method comprising reacting(A) a monomer selected from the group consisting of ethylene and a combination of ethylene and an .alpha.-olefin; and(B) a silane having the formulaR.sup.2 R.sup.3 R.sup.4 SiHwherein R.sup.2, R.sup.3 and R.sup.4 each represents a monovalent group selected from the group consisting of hydrogen, alkyl having 1 to 4 carbon atoms, aryl, alkylaryl, arylalkyl, alkoxy having 1-4 carbon atoms, phenoxy, fluorinated alkyl having 3 to 6 carbon atoms, a dialkylamino group in which the alkyl groups contain 1 to 4 carbon atoms and a diorganopolysiloxane chain containing 1 to 10 siloxane units, said reaction taking place in the presence of(C) a catalyst comprising a metallocene compound.

Abstract: An ionic metallocene catalyst for olefin polymerization which comprises: (1) a cyclopentadienyl-type ligand, a Group IVB transition metal, and alkyl, aryl, or hydride substituents, as a cation, and (2) a weakly coordinating anion comprising boron substituted with halogenated, such as tetra fluoro, aryl substituents preferably containing silylalkyl substitution, such as para-silyl t-butyldimethyl.

Abstract: A new class of olefin dimerization catalysts and an efficient method for their preparation is disclosed. B(C.sub.6 F.sub.5).sub.3 reacts quantitatively with Group 4 metallocene type catalysts to yield highly reactive cationic complexes as follows:(L.sub.2 MR.sup.2).sup.+ X.sup.- whereL=R.sub.2 (C.sub.5 H.sub.3); R=a C.sub.3 -C.sub.20 tert-alkyl group; R.sup.2 =a C.sub.1 -C.sub.20 alkyl group, HM=Ti, Zr, Hf;X.sup.- =RB(C.sub.5 F.sub.3).sup.-.sub.3, or methylalumoxane, where R"=a C.sub.1 -C.sub.20 alkyl group, H.These complexes are potent catalysts and may be used in the dimerization of .alpha.-olefins.

Abstract: A polymer having a repeating unit of ##STR1## and a method for preparing it through Zr-catalyzed polymerization of methylenecyclopropane is disclosed.