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Structural studies on osmium carbonyl hydrides XXVI. Crystal structure of a complex with a 2-methylimidazolyl ligand bound to a triosmium cluster: (μ-H)Os3(CO)10[μ-3,4-η2-C3N2H2(2-CH3)]

1983; Elsevier BV; Volume: 256; Issue: 2 Linguagem: Inglês

10.1016/s0022-328x(00)99210-6

1872-8561

Melvyn Rowen Churchill, Joseph R. Missert,

Ferrocene Chemistry and Applications

The compound (μ-H)Os3(CO)10[μ-3,4-η2-C3N2H2(2-CH3)] has been studied via a single-crystal X-ray diffraction study. It crystallizes in the centrosymmetric mono-clinic space group P21/n with a 9.568(3), b 17.663(5), c 12.063(2) Å and β 97.72(2)°. All non-hydrogen atoms were located and the structure was refined to RF 5.5% for all 1894 data and RF 3.7% for those 1511 data with ¦F0¦ > 3σ(¦F0¦). Unlike the corresponding imidazolyl complex, this 2-methylimidazolyl complex is ordered in the crystalline state. The two non-bridged OsOs bond lengths are Os(1)Os(3) 2.884(1) and Os(2)Os(3) 2.892(1) Å, while the di-bridged distance is Os(1)Os(2) 2.957(1) Å. The 2-methylimidazolyl ligand is bonded to the triosmium cluster via the linkages Os(1)N(1) 2.153(16) Å and Os(2)C(1) 2.089(18) Å.