Abstract: Vinylsilylalkoxy arylbenzotriazol monomers such as 2-[3'-t-butyl-5'-(3-"-dimethylvinylsilylpropoxy)-2'-hydroxy-phenyl]-5-meth oxybenzotriazole are disclosed. These monomers can be incorporated in optically clear silicone polymers to form intraocular lenses, contact lenses, and the like, which have UV absorbing properties.

Abstract: Ultraviolet light absorbing compositions comprising 2-(2'-hydroxy-5'-acryloyloxyalkoxyphenyl(-2H-benzotrizoles, and copolymers thereof with one or more other monomers copolyermizable therewith, particularly acrylic monomers, are useful in the manufacture of ocular devices, particularly intraocular lenses and contact lenses.

Abstract: The compounds 2'-hydroxy-5'-(hydroxyalkyl)phenyl-2H-benzotriazoles are useful as intermediate alcohols in the preparation of corresponding 2'-hydroxy-5'-acrylyloxyphenyl-2H-benzotriazole monomers, which in turn are copolymerizable with ethylenically unsaturated monomers, particularly acrylic monomers, to impart ultraviolet absorbing properties to the resulting copolymers.

Abstract: Ultraviolet light absorbing polymer compositions comprising copolymers of 2-Hydroxy-5-acrylyloxyphenyl-2H-benzotriazoles with one or more other monomers copolymerizable therewith, particularly acrylic monomers are useful in the manufacture of occular devices, particularly intraoccular lenses and contact lenses. Polymers of the disclosed benzotriazoles may be added to other organic materials to impart ultraviolet absorbing properties thereo.

Abstract: The formation of predominantly primary aliphatic perchlorates and trifluoethanesulfonates by reacting the corresponding silver salt with primary aliphatic halides in benzene at a temperature from about 5.degree. C. to about 50.degree. C. Primary aliphatic perchlorates and trifluoromethanesulfonates are excellent alkylating agents for amines, alcohols, and nitroalcohols.

Abstract: The tetradecahydroundecaborate(-1) anion is synthesized from a metal borohydride by heating a suspension of the borohydride ion in a solvent, such as diglyme, with agitation at a temperature of from 85.degree. C. to about 135.degree. C. and adding an alkyl halide. The B.sub.11 H.sub.14.sup.- anion obtained is useful in the synthesis of decaborane, an intermediate in formation a carborane-based polymers.

Abstract: A highly selective method is disclosed for cleaving carboranyl carbon-silicon bonds which comprises contacting either silylated monomeric carboranes or polymers thereof with a nucleophilic cleavage agent and, if desired, in the presence of a protic reagent and recovering the carborane cage intact. This technique is employed in a method for producing the useful meta-carborane in bulk which includes the steps of isomerizing a silylated derivative of ortho-carborane using known techniques to produce the corresponding meta-carborane derivative and then cleaving the carboranyl carbon-silicon bond to form meta-carborane.

Abstract: Derivatives of perbromic acid of the formula: XBrO.sub.4 wherein X is Ag, H.sub.3).sub.2 CH, or (CH.sub.3).sub.2 C.sub.2 H.sub.3 prepared by a synthesis of silver perbromate through the reaction of dilute aqueous perbromic acid with silver oxide at a temperature from 0.degree. to 50.degree. C, followed by a removal of water and by a synthesis of isopropyl or isobutyl perbromate through the reaction of anhydrous silver perbromate suspended in a fluid selected from the class consisting of carbon tetrachloride, cyclohexane, and 1,1,2-trichlorotrifluoroethane with an alkyl bromide at a temperature from -25.degree. to 0.degree. C. Isopropyl and isobutyl perbromates are useful as oxidizing agents for alcohols.