Dimethylerdmetall-Heterocyclen als Derivate trimethylsilylierter, -germylierter und -stannylierter Phosphane und Arsane - Synthesen, Spektren und Strukturen

The organo earth-metal heterocycles [Me2MIII-E-((MMe3)-Me-IV)(2)](n) With M-III = Al, Ga, In; E = P, As; M-IV = Si, Ge, Sn and n = 2, 3 (Me = CH3) have been prepared from the dimethyl metal compounds (Me2MX)-X-III (X = Me, H, Cl, OMe, OPh) and the pnicogen derivatives HnE((MMe3)-Me-IV)(3-n) (n = 0, 1) according to known preparation methods. The mass, H-1, C-13, P-31, Si-29, Sn-119 nmr, as well as the ir and Raman spectra have been discussed comparatively; selected representatives are characterized by X-ray structure analyses. The dimeric species with four-membered (E-M-III)(2) rings are isotypic and crystallize in the triclinic space group P (1) over bar, the trimer [Me2In-P(SnMe3)(2)](3) with a strongly puckered (In-P)(3)-ring skeleton crystallizes with two formula units per cell in the same centrosymmetric triclinic space group.