cis-1,2-Bis(diphenylphosphino)ethylene (dppv) is an organophosphorus compound with the formula C2H2(PPh2)2 (Ph = C6H5).

Both the cis and trans isomers are known, but the cis isomer is of primary interest.

For example it gives rise to the complex Ni(dppv)2 and the coordination polymer [Ni(dppv)]n.[1] As a chelating ligand, dppv is very similar to 1,2-bis(diphenylphosphino)benzene.

The diphosphine is prepared by reaction of lithium diphenylphosphide with cis-dichloroethylene.

[2] trans-1,2-Bis(diphenylphosphino)ethylene is made similarly, but using trans-dichloroethylene.