The crystal structures of trans-(Ph4P)(2)OsO2(ox)(2) (monoclinic, space group P2(1)/n, a = 12.281(2), b = 14.5440(13), c = 13.9810(12) Angstrom, beta = 100.000(8)degrees, Z = 2) and trans-(n-Bu4N)(2)OsO2(mal)(2) (triclinic, space group , a = 10.365(4), b = 10.707(3), c = 11.473(5) Angstrom, alpha = 73.00(2), beta = 64.44(3), gamma = 82.55(3)degrees, Z = 1) have been determined by single crystal X-ray diffraction analysis. The LR and Raman spectra of these complexes were measured at room temperature. Based on the molecular parameters of the X-ray determinations normal coordinate analyses have been performed and the vibrations assigned. The valence force constants of OsO2(ox)(2)(2-) are f(d)(Os=O) = 6.7 f(d)(Os-O) = 2.9, f(d)(C-O) = 5.05, f(d)(C=O) = 11.2 and f(d)(C-C) = 4.7 mdyn/Angstrom and of OsO2(mal)(2)(2-) f(d)(Os=O) = 6.7, f(d)(Os-O) = 2.9, f(d)(C-O) = 4.86, f(d)(C=O) = 11.1 and f(d)(C-C) = 4.07 mdyn/Angstrom. References: 16
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