The reaction of 8-hydroxyquinolinetributoxytitanium with ?,?-dihydroxypolydimethylsiloxanes

Андрианов, К. А.; Lavygin, I. A.

doi:10.1007/bf00845809

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“…This stability is thought to be mainly due to steric effects. Heterosiloxanes of tetravalent vanadium, such as (64), are obtained by reaction of VC4 with alkali metal silanola tes. (64) is the only member of this series that has been positively characterized.…”

Section: Siloxanes Of Titanium Zirconium and Hafniummentioning

confidence: 99%

“…Heterosiloxanes of tetravalent vanadium, such as (64), are obtained by reaction of VC4 with alkali metal silanola tes. (64) is the only member of this series that has been positively characterized. The compound is interesting because of the four oxygen atoms coordinated to the central vanadium Reaction with sulfur yields the corresponding thiovanadate (63) 11141, which, like its oxygen analogues, is stable to cold water and is thermally very stable even above 200 "C.…”

Section: Siloxanes Of Titanium Zirconium and Hafniummentioning

confidence: 99%

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Siloxane Compounds of the Transition Metals

Schindler

Schmidbaur

1967

Angew. Chem. Int. Ed. Engl.

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These C-chlorinated carbosilanes are particularly interesting in their reaction with organometallic compounds. While methylation of C-chlorinated methylchlorosilanes with CH3MgCI or CH3Li leads mainly to the Si-methyl compound, e. g. the reaction of (CH3)2CISi-CHC12 with CH3MgCl yields (CH3)3Si-CHC12, a similar reaction is hardly ever observed with chlorosilanes in which the skeletal C atom is chlorinated. After the methylation of (C1$3)2CC12 with CH3MgC1 or CH3Li, not even small quantities of the Simethylated compound [(CH3) The heterosiloxane grouping Si-0-X (X = hetero atom) is one of the most important structural units of inanimate nature. The various metal silicates are built up from such units, and profit from their high chemical and thermal stability. Numerous attempts have been made to prepare organometallic polymers from metalsubstituted silicones, in order to make use of the advantageous properties of the heterosiloxane group. Heterosiloxanes of elements of the main groups were discussed in an earlier article 111. The present article deals with the corresponding compounds of the transition elements, which were almost unknown until a few years ago. Efforts to synthesize new inorganic polymers [2,31 have also led to fundamental investigations in this field.

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Section: Siloxanes Of Titanium Zirconium and Hafniummentioning

confidence: 99%

Section: Siloxanes Of Titanium Zirconium and Hafniummentioning

confidence: 99%