Abstract The dimeric cyclometallated derivatives of palladium (II)[(LH) PdCl] 2, 3 (L= 1, Diazepam: 7-chloro-1, 3-dihydro-1-methyl-5-phenyl-2H-1, 4-benzodiazepin-2-one) and 4 (L= 2, Prazepam: 7-chloro-1-cyclopropylmethyl-1, 3-dihydro-5-phenyl-2H-1, 4- benzodiazepin-2-one) react with triphenylphosphine to give the complexes (LH) Pd (PPh 3) Cl, 5 (L= Diazepam) and 6 (L= Prazepam). The crystal structure of 6 was determined by X- ...