Transition metal phosphido complexes

The inversion of configuration at pyramidal terminal phosphides has been observed by 31P NMR spectroscopy.

[10] Terminal planar phosphido ligands engage in M-P multiple bonding.

Planar phosphido complexes usually have shorter M-P bonds and wider M-P-R angles.

[11] In (C5H5)2Hf(PR2)2, which can be prepared by salt metathesis from hafnocene dichloride, Hf(IV) is bonded to both planar and pyramidal phosphido ligands.

Illustrative of the use of R2PCl-like reagents is the synthesis of a diiron diphosphide:[14] Metal phosphido complexes are intermediates the catalytic hydrophosphinations, which is a route to organophosphorus compound.

Although this methodology has not proven to be of practical value, it offers the potential for producing specialized phosphine ligands.

This P-C bond forming step proceeds through an outer-sphere, Michael-type addition.

Synthesis of phosphido complex by oxidative addition of a P-H bond (Et = [[[ethyl]]
Synthesis of a bis(phosphido) complex by salt metathesis concomitant with reduction at the metal (Cy = cyclohexyl
Structure of the Mo 2 P 4 C 8 core of Mo 2 [P(tert-Bu) 2 ] 4 . [ 5 ]
Illustrative complexes of "pyramidal phosphido ligands".
examples of the inversion of configuration at phosphorus in phosphido complex
Resonance structures for complexes of planar phosphido ligands
Structure of Fe 2 (μ-PPh 2 ) 2 (CO) 6 . [ 13 ]
Cycle for enantioselective synthesis of tertiary phosphines by using phosphido complex intermediate