Abstract The reaction of 1, 3-bis [(2-chloro) benzene] triazene (HL) and [Pd (CH 3 CN) 4] Cl 2 gave a new dinuclear triazenido complex [Pd 2 L 2] 1 (L= 1, 3-bis [(2-chloro) benzene] triazene ion). Electrochemcial studies showed that complex 1 is capable of generating hydrogen from acetic acid in CH 2 Cl 2.