A Rare Cyclic Dimolybdenum Triad with Three Weakly Interacting Unpaired Electrons |
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| Authors: | F Albert Cotton Naresh S Dalal Narpinder Kaur Carlos A Murillo Mark D Young Qinliang Zhao |
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| Institution: | (1) Laboratory of Molecular Structure and Bonding, Department of Chemistry, Texas A & M University, P.O. Box 30012, College Station, TX 77842-3012, USA;(2) Department of Chemistry and Biochemistry and Center for Magnetic Resonance, National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL 32306-4390, USA;; |
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| Abstract: | Oxidation of α-Mo2(cis-DAniF)2]3(μ-F)6 with an excess of FeCp2BF4 produces the triply oxidized species {β-Mo2(cis-DAniF)2]3(μ-F)6}(BF4)3. During the oxidation process, the conformation in the α triangular species changes from an arrangement in which two dimetal units are parallel and the third one essentially orthogonal to a structure in which all three dimetal units are parallel. Furthermore, upon removal of three electrons, the Mo–Mo distances increase by about 0.05–0.06 Å and the Mo–F bond distances decrease by 0.04 Å. The structural data, as well as EPR, are consistent with an electronically localized system and a decrease in bond order from 4 to 3.5 for each dimetal unit. |
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