Elsevier Sequoia SA, Lausanne - Printed in The Netherlands ... INSERTION REACTIONS OF ELECTRON-DEFICIENT SPECIES: INSERTION OF GERMYLENES AND PHENYLPHOSPHINIDENE INTO GERMANIUM-GERMANIUM BONDS ... A. CASTEL, J. ESCUDIE, P. RIVIERE, J. SATGB L..aboratoire de Chimie des Organomindraux ERA no 829 du CNRS, Universit& Paul Sabatier, 31062 Toulouse cedex (France) ... MN. BOCHKAREV, LP MAIOROVA and GA ...