A mixture of rac- and meso-HfCl2[Ph2Si(η5-C9H6)2] was synthesized by treatment of HfCl4 with the dilithium salt of di(1H-inden-1-yl)diphenylsilane. These complexes were isolated after fractional crystallization in 15.5 and 8.5% yields, respectively. A sterically strained ansa complex HfCl2[Ph2Si(η5-C13H8)(η5-C5H4)] was synthesized in 62% yield by treatment of HfCl4 with the dilithium salt of cyclopentadienyl(fluoren-9-yl)diphenylsilane. Both this compound, and the by-product of reaction, HfCl2[Ph2Si(C13H9)(η5-C5H4)]2, were characterized by crystal structure analysis.
通过将HfCl4与二(1H-
茚-1-基)二苯基
硅烷的双
锂盐反应,合成了rac-和meso-HfCl2[Ph2Si(η5-
C9H6)2]的混合物。这些络合物经过分级结晶分别以15.5%和8.5%的产率被分离出来。通过将HfCl4与
环戊二烯(
氟烯-9-基)二苯基
硅烷的双
锂盐反应,合成了一种立体受压的ansa络合物HfCl2[Ph2Si(η5-
C13H8)(η5-
C5H4)],产率为62%。该化合物及其反应副产物HfCl2[Ph2Si(
C13H9)(η5- )]2通过晶体结构分析进行了表征。