23. One of the following complexes does not contain a dihydrogen ligand. Which is likely?
(note: dppe = 1,2-bis(diphenylphosphino)ethane; Ph = phenyl;iPr = isopropyl) [2 pts]
(A)MoH2(CO)(dppe)2 (B) WH2(CO)(dppe)2 (C) RuH4(PPh3)3 (D) [ReH2(PiPr3)3(CO)3]+