[(η⁵-C₅R₅)TiCl₂(η⁵-C₅H₄SiMe₂)]₂O·nCH₂Cl₂

Abstract

The first title metallocene, 1,3-bis(dichlorotitanocene)-1,1,3,3-tetramethyldisiloxane dichloromethane solvate, [(η5-C5H5)­TiCl2­(η5-C5H4­Si­Me2)]2O·­CH2Cl2, (I), crystallizes in space group P21/c. Compound (I) represents the first crystal structure of a bimetallic siloxy-bridged titanocene. The geometric parameters of (I) are similar to those of the parent titanocene; however, the disiloxane substituents adopt an unexpected eclipsed conformation. The second title metallocene, 1,3-bis­[(penta­methyl­cyclo­penta­dienyl)­(cyclo­penta­dien­yl)­titanium dichloride]-1,1,3,3-tetra­methyl­disiloxane, [(η5-C5-Me5)­TiCl2­(η5-C5H4­Si­Me2)]2O, (II), represents the second crystal structure of a bimetallic siloxy-bridged titanocene and crystallizes in the space group P21/n. Compound (I) possesses non-crystallographic twofold molecular symmetry and both metal centers adopt pseudo-tetrahedral geometries. The geometric parameters of (II) are similar to those of the mixed titanocene Cp*CpTiCl2 (Cp* = C5Me5) and the disiloxane substituents adopt a staggered conformation.