Synthese und Kristallstruktur von iodmethyltriphenylphophonium-iodid (C6H5)3PCH2I+I-

Iodomethyltriphenylphosphonium iodide, (C 6 H 5 ) 3 PCH 2 I + I - has been prepared by the reaction of (C 6 H 5 ) 3 with CH 2 I 2 in dichloromethane forming colourless needle like crystals. The crystal and molecular structures have been determined by an X-ray structure analysis. The crystals are orthorhombic, space group Pca2 1 , Z=8; a=1478,8(3) pm, b=1249,3(3) pm, c=2053,2(3) pm. R=0.050 for 3219 observed reflections with I≥2 σ(I)