Synthesis and structural characterization of azatitanacyclobutane derivatives

被引:0
|
作者
Beckhaus, R [1 ]
Wagner, M [1 ]
Wang, RM [1 ]
机构
[1] Rhein Westfal TH Aachen, Inst Anorgan Chem, D-52056 Aachen, Germany
关键词
titanium; vinylidene complexes; 2+2] cycloaddition; metallacycles; azatitanacyclobutanes; clathrates;
D O I
暂无
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
The titanocene vinylidene intermediate [Cp-2*Ti=C=CH2] (9) reacted with the carbodiimides R-N=C=N-R [R = p-CH3C6H4 (19a), C6H11 (19b)] to give the N=C-cycloaddition products [(Cp2Ti)-Ti-*{-NR-C(=NR)-(C=CH2)-}] [(R = p-CH3C6H4 (20a), C6H11 (20b)]. The X-ray structure of 20a in form of a surprisingly stable n-hexane clathrate is presented. The azatitanacyclobutane [(Cp2Ti)-Ti-*{-NPh-C(Ph)(H)-(C=CH2)-}] (22) was formed from the reaction between 9 and benzylidene aniline [PhN=C(Ph)H (21)]. Reactivity studies showed that azatitanacyclobutanes are unreactive upon typical ring-enlargement reactions as observed for other four-membered titanacycles.
引用
收藏
页码:253 / 256
页数:4
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