A Heterobimetallic W-Ni Complex Containing a Redox-Active W[SNS]2 Metalloligand.
The tungsten complex W[SNS]2 ([SNS]H3 = bis(2-mercapto-4-methylphenyl)amine) was bound to a Ni(dppe) [dppe = 1,2-bis(diphenylphosphino)ethane] fragment to form the new heterobimetallic complex W[SNS]2Ni(dppe). Characterization of the complex by single-crystal X-ray diffraction revealed the presence of a short W-Ni bond, which renders the complex diamagnetic despite formal tungsten(V) and nickel(I) oxidation states. The W[SNS]2 unit acts as a redox-active metalloligand in the bimetallic complex, which displays four one-electron redox processes by cyclic voltammetry. In the presence of the organic acid 4-cyanoanilinium tetrafluoroborate, W[SNS]2Ni(dppe) catalyzes the electrochemical reduction of protons to hydrogen coincident with the first reduction of the complex.
Department of Chemistry, University of California , 1102 Natural Sciences 2, Irvine, California 92677, United States.
Kyle E
KE
Rosenkoetter
Department of Chemistry, University of California , 1102 Natural Sciences 2, Irvine, California 92677, United States.
Joseph W
JW
Ziller
Department of Chemistry, University of California , 1102 Natural Sciences 2, Irvine, California 92677, United States.
Alan F
AF
Heyduk