"' Dichloro [ 1, 3-bis ( diphenylphosphino ) propane ] nickel "'a coordination complex with the formula NiCl 2 ( dppp ); where dppp is the diphosphine 1, 3-bis ( diphenylphosphino ) propane.
22.
Chelating ligands are unable to form linear complexes and thus silver ( I ) complexes with them tend to form polymers; a few exceptions exist, such as the near-tetrahedral diphosphine and diarsine complexes [ Ag ( L L ) 2 ] +.
23.
In 1844, Paul Th�nard, son of the French chemist Louis Jacques Th�nard, used a cold trap to separate diphosphine from phosphine that had been generated from calcium phosphide, thereby demonstrating that P 2 H 4 is responsible for spontaneous flammability associated with PH 3, and also for the characteristic orange / brown color that can form on surfaces, which is a polymerisation product.
