Cotton F Albert, Murillo Carlos A, Wang Xiaoping, Wilkinson Chad C
Department of Chemistry and Laboratory of Molecular Structure and Bonding, P.O. Box 30012, Texas A&M University, College Station, TX 77842-3012, USA.
Dalton Trans. 2007 Sep 21(35):3943-51. doi: 10.1039/b707201e. Epub 2007 Jul 25.
Six very soluble paddlewheel compounds containing Mo2n+ units, n = 4, 5, 6, and two alkyl-substituted bicyclic guanidinate ligands have been synthesized. The quadruply bonded complexes with n = 4, Mo2(TMhpp)4 and Mo2(TEhpp)4, (TMhpp = the anion of 3,3,9,9-tetramethyl-1,5,7-triazabicyclo[4.4.0]dec-4-ene and TEhpp = the anion of 3,3,9,9-tetraethyl-1,5,7-triazabicyclo[4.4.0]dec-4-ene) are easily oxidized. The electrode potentials in THF are -1.08 and -1.17 V vs. Ag/AgCl, respectively, for the Mo(2)(5+/4+) couple. These potentials are in accord with the low ionization potentials for the quadruply bonded compounds. Because of the high solubility of the Mo(2)(4+) compounds in most common organic solvents they are attractive candidates for use as strong reducing agents in homogeneous systems.
已合成出六种非常易溶的包含Mo2n+单元（n = 4、5、6）以及两个烷基取代双环胍盐配体的桨轮化合物。具有四重键的n = 4的配合物Mo2(TMhpp)4和Mo2(TEhpp)4（TMhpp = 3,3,9,9-四甲基-1,5,7-三氮杂双环[4.4.0]癸-4-烯的阴离子，TEhpp = 3,3,9,9-四乙基-1,5,7-三氮杂双环[4.4.0]癸-4-烯的阴离子）易于被氧化。对于Mo(2)(5+/4+)电对，在四氢呋喃中的电极电位分别相对于Ag/AgCl为 -1.08 V和 -1.17 V。这些电位与四重键化合物的低电离电位一致。由于Mo(2)(4+)化合物在大多数常见有机溶剂中的高溶解性，它们是在均相体系中用作强还原剂的有吸引力的候选物。
