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首页> 外文期刊>Zeitschrift fur Anorganische und Allgemeine Chemie >SYNTHESIS, CRYSTAL STRUCTURE, VIBRATIONAL SPECTRA, AND NORMAL COORDINATE ANALYSIS OF K-2[OSCL5(CO)]CENTER-DOT-H2O [German]
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SYNTHESIS, CRYSTAL STRUCTURE, VIBRATIONAL SPECTRA, AND NORMAL COORDINATE ANALYSIS OF K-2[OSCL5(CO)]CENTER-DOT-H2O [German]

机译:K-2 [OSCL5(CO)] CENTER-DOT-H2O的合成,晶体结构,振动光谱和正态坐标分析[德语]

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The X-ray structure determination of K-2[OsCl5(CO)]. H2O (monoclinic, space group P2(1)/c a=13.600(2), b=7.122(1), c=22.186(11)Angstrom, beta=98.66(3)degrees, Z=8) revealed two crystallographic independent bat very similar complex anions [OsCl5(CO)](2-) with rough C-4v point symmetry. Due to the stronger trans influence of the carbonyl group the bond lengths in the Cl-Os-CO axis Os-Cl=2.449(2), 2.430(2) Angstrom are langer as compared with the octahedron basis Os-Cl=2.340-2.370 Angstrom. The water of crystallization is coordinated to potassium (K-OH2=2.625-2.815 Angstrom). Using the molecular parameters the IR and Raman spectra are assigned by normal coordinate analysis. The valence force constants are f(d)(CO)=15.30, f(d)(OsC)=3.88, f(d)(OsCl)=1.81, f(d)(OsCl)=1.36, f(d)(OH)=7.65, 7.82, 7.79 mdyn/Angstrom. The strengthening of the Os-C bond by stronger back donation of the Os-III(d(5)) complex in comparison with the isostructural Os-IV(d(4)) compound is discussed. [References: 32]
机译:K-2 [OsCl5(CO)]的X射线结构测定。 H2O(单斜晶系,空间群P2(1)/ca=13.600(2),b = 7.122(1),c = 22.186(11)埃,β= 98.66(3)度,Z = 8)显示了两个晶体学独立的蝙蝠非常相似的复杂阴离子[OsCl5(CO)](2-),具有粗糙的C-4v点对称性。由于羰基的强反式影响,Cl-Os-CO轴上的键长Os-Cl = 2.449(2),2.430(2)埃比八面体基Os-Cl = 2.340-2.370埃。结晶水与钾配位(K-OH2 = 2.625-2.815埃)。使用分子参数,通过正态坐标分析指定IR和拉曼光谱。价常数为f(d)(CO)= 15.30,f(d)(OsC)= 3.88,f(d)(OsCl)= 1.81,f(d)(OsCl)= 1.36,f(d)( OH)= 7.65,7.82,7.79 mdyn /埃。与同结构的Os-IV(d(4))化合物相比,讨论了通过更强的Os-III(d(5))配合物的背向供体来增强Os-C键。 [参考:32]

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