ISSN:
1600-5759
Source:
Crystallography Journals Online : IUCR Backfile Archive 1948-2001
Topics:
Chemistry and Pharmacology
,
Geosciences
,
Physics
Notes:
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.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1107/S0108270199012718
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