Strained metallastannoxanes-ring-opening polymerization versus retention of six-membered-ring structure

被引：26

作者：

Beckmann, J ^{[1
]}

Jurkschat, K ^{[1
]}

Kaltenbrunner, U ^{[1
]}

Pieper, N ^{[1
]}

Schürmann, M ^{[1
]}

机构：

[1] Univ Dortmund, Fachbereich Chem, Lehrstuhl Anorgan Chem 2, D-44221 Dortmund, Germany

来源：

ORGANOMETALLICS | 1999年 / 18卷 / 09期

关键词：

D O I：

10.1021/om980790+

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The synthesis is reported of the novel stannasiloxanes cyclo-M(OSiPh2)(2)O (1, M = Sn[(CH2)(3)NMe2](2); 2, M = Sn[(CH2)(3)N(Me)CH2](2); 4, M = Sn[Cp(CO)(2)Fe](2); 5, M = Sn[Cp(CO)(3)W](2); a, M = Sn(t-Bu)[Cp(CO)(3)W]) and cyclo-(Ph2SiOSnR2O)(2) (3, R = (CH2)(3)NMe2), and of the stannagermoxane cyclo-t-Bu2Sn(OGePh2)(2)O (7). The molecular structures are described of 1-4, 6, and 7. The compounds exhibit reduced ring strain as a result of either intramolecular Sn-N coordination (1, 2) or electronic influence of the transition-metal fragments (4-6), and consequently they are six-membered rings in solution as well as in the solid state, whereas compound 3 is an eight-membered ring.

引用

页码：1586 / 1595

页数：10

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