Homolytic bimolecular displacement at carbon in organocobaloximes: Intramolecular cyclizations

835-837The reactions of hex-5 -enyl-, 2-allyloxyethyl- and 5-phenylpent-4-ynyl- cobaloximes with arene sulphonyl chlorides under visible light photolysis at O°C give the corresponding cyclized products. &nbsp;The results are interpreted in terms of SH2' mechanism.<span style="font-size:12.0pt;font-family:Symbol; mso-fareast-font-family:" times="" new="" roman";mso-bidi-font-family:"times="" roman";="" mso-ansi-language:en-us;mso-fareast-language:en-us;mso-bidi-language:ar-sa"=""><span style="font-size:12.0pt;font-family:Symbol; mso-fareast-font-family:" times="" new="" roman";mso-bidi-font-family:"times="" roman";="" mso-ansi-language:en-us;mso-fareast-language:en-us;mso-bidi-language:ar-sa"=""></span

Cleavage of Co-C bond in allyl cobaloximes with arenesulphenyl chloride

830-834Arenesulphenyl chlorides (ArSCI; Ar = Ph, C6Cl5, 2,4(N02)2 C6H3) are reacted with allylcobaloximes, RCo(dmgH)2Py (R= allyl), under thermal and photochemical conditions to obtain the corresponding sulphides as the major organic products.-Pinenyl cobaloxime forms the ring opened product as well. The homolytic as well as heterolytic cleavage of the Co-C bond is considered.</span

Homolytic displacements at carbon in organocobaloximes: Reactions of organocobaloximes with free radical precursor with two radical centres

986-988The reactions of MeC6H4-SO2-SPh with organocobaloximes, RCo(dmgH)2Py, (R= alkyl, benzyl, butenyl and allyl) under visible light photolysis show that the alkyl, butenyl and benzyl cobaloximes form the corresponding sulphides whereas the allyl cobaloximes form the organic sulphones