In situ IR spectroscopy was used to study the kinetics of addition of L = alkyl and aryl isocyanides to the Grubbs second-generation carbene complex Ru(H2IMes)(CHPh)(PCy3)Cl2 (H2IMes = 1,3-dimesityl-4,5-dihydroimidazol-2-ylidene), which triggers carbene insertion into an aromatic ring of the N-heterocyclic carbene supporting ligand, forming Ru1-mesityl-3-(7′-Ph-2′,4′,6′-trimethylcycloheptatrienyl)-4
使用原位红外光谱研究了将L =烷基和芳基
异氰酸酯添加到Grubbs第二代卡宾络合物Ru(H 2 IMes)(
CHPh)(
PCy 3)Cl 2(H 2 IMes = 1,3 -dimesityl-4,5-dihydroimidazol-2-ylidene),触发卡宾插入N杂环卡宾支持
配体的芳香环,形成Ru 1-mesityl-3-(7'-Ph-2',4 ′,6′-三
甲基环庚三烯基)-4,5-二
氢咪唑-2-亚基} L 2(
PCy 3)Cl 2。速率定律被确定为异
氰化物浓度为一阶,卡宾络合物浓度为一阶。对于各种异
氰化物,CNR的比率随着R =叔数的增加而增加丁基≪
环己基<
正辛基