The synthesis and reactivity of a molybdenum (IV) stretched-dihydrogen complex |
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| Authors: | Cameron Thomas M Ortiz Carlos G Ghiviriga Ion Abboud Khalil A Boncella James M |
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| Institution: | Department of Chemistry and Center for Catalysis, University of Florida, Gainesville, Florida 32611-7200, USA. |
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| Abstract: | Reaction of Mo(NPh)(PMe3)3(o-(Me3SiN)2C6H4)] (1) with molecular hydrogen (ca. 1 atm) at -10 degrees C in toluene-d8 results in the formation of dihydrogen complex Mo(NPh)(PMe3)2(H2)(o-(Me3SiN)2C6H4)] (2) by 1H and 31P NMR spectroscopy. In solution at -50 degrees C 1 and 2 are present in a 1:3 ratio, respectively. The nature of dihydrogen ligand bonding in 2 was probed by T1 analysis and analysis of the JH-D coupling constant in the deuterium hydride isotopomer of 2 giving H-H distances of 1.18 A and 1.17 A, respectively. When allowed to warm to 30 degrees C, 2 reacts affording Mo(NPh)(PMe3)3(o-(Me3SiN)(NH)C6H4)] (3) over a 1 h period. The X-ray structures of 1 and 3 are reported. |
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