C18H15P

[SnI4(PPh3)2] is a tin complex that forms brownish-red crystals.

Tse-Fang Kristen Chiu has written:

'Hydrogenation of canola oil in the presence of nickel and dichloro-dicarbonyl-bis-(triphenylphosphine) ruthenium (II)'

(Ph3P)2SnI4 has two isomers. It is octahedral, so the central atom is tin. The two isomers are caused by varying locations of the triphenylphosphine. In one isomer, the two PH3P are located across from each other.

It is a neutral ligand donating two electrons to the overall valence electron count of the molecule. Also known as triphenylphosphine; the phosphorous has three bonds to phenyl substituents as well as one bond to the main compound you are attaching it to, and a lone pair of electrons.