Tetraphenyldiphosphine is the organophosphorus compound with the formula [PPh2]2, where Ph = phenyl (C6H5).

It is a white, air-sensitive solid that dissolves in nonpolar solvents.

It is a centrosymmetric molecule with a P-P bond of 2.2592 Å.

[1] Tetraphenyldiphosphine is produced by reductive coupling of chlorodiphenylphosphine: The compound is used as a source of the Ph2P− group.

[2]