Synthesis and structures of bimetallic silicon-containing imido alkylidene complexes of tungsten (R′O)2(ArN)WCH-SiR2-CHW(NAr)(OR′)2 (R = Me, Ph) and (R′O)2(ArN)WCH-SiMe2SiMe2-CHW(NAr)(OR′)2 |
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| Authors: | Andrey L Bochkarev Gleb A Abakumov |
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| Institution: | G.A. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences, Tropinina 49, Nizhny Novgorod 603950, Russia |
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| Abstract: | Bimetallic alkylidene complexes of tungsten (R′O)2(ArN)W CH-SiR2-CHW(NAr)(OR′)2 (R = Me (1), Ph (2)) and (R′O)2(ArN)WCH-SiMe2SiMe2-CHW(NAr)(OR′)2 (3) (Ar =  ; R′ = CMe2CF3) have been prepared by the reactions of divinyl silicon reagents R2Si(CHCH2)2 with known alkylidene compounds R′′-CHMo(NAr)(OR′)2. (R′′ = But, PhMe2C) Complexes 1-3 were structurally characterized. Ring opening metathesis polymerization (ROMP) of cyclooctene using compounds 1-3 as initiators led to the formation of high molecular weight polyoctenamers with predominant trans-units content in the case of 1 and 3 and predominant cis-units content in the case of 2. |
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| Keywords: | Bimetallic alkylidene complexes Tungsten Silicon Synthesis Structure elucidation Ring opening metathesis polymerization |
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