Structure–Catalytic Activity Relationship in Bridging Silacycloalkyl Ring Conformations of Constrained Geometry Titanium Complexes
作者:Eugene Kang、Sung‐Kwan Kim、Tae‐Jin Kim、Jae‐Ho Chung、Jong Sok Hahn、Jaejung Ko、Myung‐Ahn Ok、Minserk Cheong、Sang Ook Kang
DOI:10.1002/ejic.200701312
日期:2008.5
itanium(IV) complexes [TiCl2η5-1-(CySitBuN-κN)-2,3,4,5-R4-C5}] was prepared, where CySi = silacyclobutyl (a), silacyclopentenyl (b), silacyclopentyl (c), and silacyclohexyl (d); R = H (4), Me (5). The starting silane, dichlorosilacycloalkane CySiCl2 (1), was treated with NaCp (LiCp*), followed by LiNHtBu to yield the cyclic silylene-bridged ligands (R4C5)CySi(NHtBu) [R = H (2); Me (3)]. Subsequent
制备了一系列环状亚甲硅烷基桥连(酰胺基环戊二烯基)二氯钛(IV)配合物[TiCl2η5-1-(CySitBuN-κN)-2,3,4,5-R4-C5}],其中CySi = 硅杂环丁基(a )、硅杂环戊烯基(b)、硅杂环戊基(c)和硅杂环己基(d);R = H (4),我 (5)。起始硅烷,二氯硅杂环烷烃 CySiCl2 (1),先后用 NaCp (LiCp*) 和 LiNHtBu 处理,得到环状亚甲硅烷基桥配体 (R4C5)CySi(NHtBu) [R = H (2); 我(3)]。随后用正丁基锂去质子化,然后用 TiCl4 进行金属转移,产生所需的受限几何络合物 (CGC) (CpCySiNtBu)TiCl2 (4) 和 (Cp*CySiNtBu)TiCl2 (5)。所得环戊二烯基-(4b和4c)和四甲基环戊二烯基(硅杂环烷基)酰氨基钛(IV)二氯化物(5a、5c、和 5d) 物种通过使用