Organoelement halides of the general formula R2'ECl2(E = C, Si, Ge, Sn; R#x2032; = H, Me, Et, n-Bu) and other compounds such as SCl2, (C5H5)2TiCl2and ZnCl2react with alkali-phosphides RMP- (RP)n-PMR (n = 1,2; R = Ph, Cy; M = Na, K) forming the corresponding 1,2,3,4-tetraorgeno-cyclo-element-1,2,3,4-tetraphosphines. Polymeric and metalhalogen exchange products are obtained in the case of RECl2(E = Al, N, As, Sb) and transition element halides, respectively. The five-membered ring structure of the title compounds is confirmed by their molecular weight and31P-nmr-spectra.
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