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A novel cyclic titanasiloxane derived from [Ph2Si(OH)](2)O: synthesis and crystal structure of [Cp*Ti(Cl)(OSiPh(2)OSiPh(2)OSiPk(2)O)]

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Title A novel cyclic titanasiloxane derived from [Ph2Si(OH)](2)O: synthesis and crystal structure of [Cp*Ti(Cl)(OSiPh(2)OSiPh(2)OSiPk(2)O)]
 
Creator MURUGAVEL, R
SHETE, VS
BAHETI, K
DAVIS, P
 
Subject epoxidation catalysts
silica surfaces
x-ray
titanium
silsesquioxanes
titanosilicates
silanetriols
oxidation
chemistry
titanasiloxanes
cyclopentadienyl complexes
silanols
siloxides
 
Description Reaction of Cp*Ti(OAr)Cl-2 (Ar = 2,6-Me2C6H3) with dilithium salt of [Ph2Si(OH)](2)O in a 1:1 molar ratio in toluene at room temperature yields titanatrisiloxane ring compound [Cp*Ti(Cl)(OSiPh2OSiPh2OSiPh2O)] (1). Siloxane chain-expansion effect has been observed in the product formation, which is presumed to be a consequence of the ring strain in the titanadisiloxane system. Compound 1 has been characterized by microanalysis, IR, and NMR spectroscopic techniques. The molecular structure Of 1 determined by X-ray diffraction reveals that the central eight-membered TiSi3O4 siloxane-ring exists in an unusual butterfly-like conformation. (C) 2001 .
 
Publisher ELSEVIER SCIENCE SA
 
Date 2011-07-27T14:42:39Z
2011-12-26T12:57:28Z
2011-12-27T05:41:36Z
2011-07-27T14:42:39Z
2011-12-26T12:57:28Z
2011-12-27T05:41:36Z
2001
 
Type Article
 
Identifier JOURNAL OF ORGANOMETALLIC CHEMISTRY, 625(2), 195-199
0022-328X
http://dx.doi.org/10.1016/S0022-328X(00)00946-3
http://dspace.library.iitb.ac.in/xmlui/handle/10054/7250
http://hdl.handle.net/10054/7250
 
Language en