Diphosphanylmetallocenes of Main-Group Elements

Several 1,1’-diphosphanyl-substituted metallo cenes of magnesium (magnesocenes) were synthesized, structurally characterized, and their reactivity and coordina tion chemistry were investigated. Transmetalation of these magnesocenes gives access to group 14 metallocenes (tetre locenes), as well as to group 15 stibonocenes. These s- and p-block metallocenes represent a novel class of bis(phos phanyl) ligands, exhibiting Lewis-amphiphilic character. Their coordination chemistry towards different transition-metal and main-group fragments was investigated and different complexes are presented