PHOSPHINE ALKYLENES .50. ON THE STRUCTURE OF 2,2,2-TRIPHENYL-1,2-LAMBDA-5-OXAPHOSPHOLANES

被引：14
作者：
BESTMANN, HJ
RIEMER, C
DOTZER, R
机构：
[1] Institut Für Organische Chemie, Universität Erlangen-Nürnberg, Erlangen, W-8520
来源：
CHEMISCHE BERICHTE-RECUEIL | 1992年 / 125卷 / 01期
关键词：
PHOSPHORUS; TETRACOORDINATE AND PENTACOORDINATE; OXAPHOSPHOLANES; TRIGONAL-BYPYRAMIDAL STRUCTURE; EQUILIBRIUM OF RING AND BETAIN STRUCTURE IN POLAR SOLVENT;
D O I：
10.1002/cber.19921250135
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
2,2,2-Triphenyl-1,2-lambda(5)-oxaphospholanes (5a-h) were synthesized from methylene-triphenylphosphorane (1, R H) and suitable epoxides (2a-g). Oxaphospholane 5e was subjected to an X-ray structural analysis, which showed a five-membered ring-structure with a trigonal-bipyramidal coordinate phosphorus atom. One phenyl group and the ring oxygen atom are apical ligands at phosphorus. According to the NMR spectra, oxaphospholanes have a ring structure in nonpolar solvents, whereas in polar solvents there exists an equilibrium with an open-chain form.
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页码：225 / 229
页数：5
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