Using titanocene synthon [Cp2Ti(Me3SiC2SiMe3)] the selective conversion of aryl-substituted triphosphiranes P3Ar3 into Cp2TiP2Ar2 complexes was achieved.

Phospha–Wittig reagents of the type RPPMe3 can be considered as phosphine-stabilized phosphinidenes and were shown to react with NHCs and NHOs to afford NHC phosphinidene adducts or P-substituted NHOs, respectively.

N-containing molecules are mostly derived from ammonia (NH 3 ). Ammonia activation has been demonstrated for single transition metal centers as well as for low-valent main group species. Phosphinidenes, mono-valent phosphorus species, can be stabilized by phosphines, giving so-called phosphanylidenephosphoranes of the type RP(PR' 3 ). We demonstrate the facile, metal-free NH 3 activation using ArP(PMe 3 ), affording for the first time isolable secondary aminophosphines ArP(H)NH 2 . DFT studies reveal that two molecules of NH 3 act in concert to facilitate an NH 3 for PMe 3 exchange. Furthermore, H 2 NR and HNR 2 activation is demonstrated.

Terphenyl(bisamino)phosphines have been identified as effective ligands in cationic gold(I) complexes for the hydroamination of acetylenes. These systems are related to Buchwald phosphines and their steric properties have been evaluated....