Abstract We present the synthesis of novel sila-, germa-and stanna-phospholanes: 2, 5- dimetallaphospholanes, 2-metalla 1, 3-diphospholanes and 3-metalla 1, 2-diphospholanes. Preparation and characterization reactions of the first stable diphosphorus germylene are also described. Nous décrivons dans ce mémoire la synthèse de nouveaux sila-germa-et stannaphospholannes: dimétalla-2, 5 phospholannes, métalla-2 diphospholannes-1, 3 et ...