%0 Journal Article %A Fan, Jang-Shyang %A Liu, Rai-Shung %D 1998 %T A Transition-Metal−η4-Diene Cation Can Undergo Nucleophilic Addition at the Internal Carbon %U https://acs.figshare.com/articles/journal_contribution/A_Transition-Metal_sup_4_sup_-Diene_Cation_Can_Undergo_Nucleophilic_Addition_at_the_Internal_Carbon/3781578 %R 10.1021/om971033z.s001 %2 https://acs.figshare.com/ndownloader/files/5892543 %K naphthyl %K diene fragment %K Undergo Nucleophilic Addition %K cationic η 4 %K methylvinyl %K Internal Carbon Treatment %K CO %K phenyl %K THF %K nucleophile %K Diene Cation %K cyclohexadiene %K RMgBr %K CpW %X Treatment of CpW(CO)24-cyclohexadiene)BF4 with RMgBr (R = methylvinyl, phenyl, naphthyl) in cold THF (−78 °C) afforded the CpW(CO)2[(1,2,4-η)-1-CO-2-R-cyclohexene] complex as the major product; this result provides an example of a nucleophile attacking the internal carbon of a cationic η4-diene fragment. %I ACS Publications