Dppm, a white, crystalline powder, is used in inorganic and organometallic chemistry as a ligand.

[2] 1,1-Bis(diphenylphosphino)methane was first prepared by the reaction of sodium diphenylphosphide (Ph2PNa) with dichloromethane:[3] The methylene group (CH2) in dppm (and especially its complexes) is mildly acidic.

As a chelating ligand, 1,1-bis(diphenylphosphino)methane forms a four-membered ring with the constituents MP2C.

The ligand promotes the formation of bimetallic complexes that feature five-membered M2P2C rings.

In this complex, the oxidation state for the Pd centres are I. Bis(diphenylphosphino)methane gives rise to a family of coordination compounds known as A-frame complexes.