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1,3-Bis(triphenylphosphonium-ylidyl)cyclotetraphosphane |
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| Authors: | G Jochem A Schmidpeter K Karaghiosoff H Nth |
| Institution: | G. Jochem,A. Schmidpeter,K. Karaghiosoff,H. Nöth |
| Abstract: | 1,3-Bis(triphenylphosphonium-ylidyl)cyclotetraphosphines The title compounds 3a , b result from the condensation of the ylidyldichlorophosphines Ph3PCR? PCl2 1a , b (R = Me, 3-Tol) with phenyl bis(trimethylsilyl)phosphine 2 . Analysis of the 31P-NMR spectra and the X-ray structure investigation of 3a demonstrate a folding of the four-membered ring and an all-trans orientation of the substituents. |
| Keywords: | Diphosphene dimerization Ylide substituents Cyclotetraphosphine structure 31P-NMR spectra analysis Transanular electron lone pair interaction |