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首页> 外文期刊>Zeitschrift fur Anorganische und Allgemeine Chemie >PREPARATION, CRYSTAL STRUCTURES, VIBRATIONAL SPECTRA, AND NORMAL COORDINATE ANALYSIS OF [(MO6BR8I)Y-6(A)](2-) Y-A = CN, NCS [German]
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PREPARATION, CRYSTAL STRUCTURES, VIBRATIONAL SPECTRA, AND NORMAL COORDINATE ANALYSIS OF [(MO6BR8I)Y-6(A)](2-) Y-A = CN, NCS [German]

机译:[(MO6BR8I)Y-6(A)](2-)Y-A = CN,NCS的制备,晶体结构,振动光谱和正态坐标分析[德语]

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By treatment of [(Mo6Br8i)Br-6(a)](2-) with AgNO3 in acetone and addition of KCN or KNCS the hexacyano and hexaisothiocyanato derivates [(Mo6Br8i)Y-6(a)](2-), Y-a = CN, NCS are formed. X-ray structure determinations of (Ph4P)(2)[(Mo6Br8i)(CN)(6)(a)]. 4H(2)O (1) (triclinic, spacegroup P1, a = 11.63(3), b = 11.85(1), c = 14.23(5) Angstrom, alpha = 71.8(1)degrees, beta = 67.6(3)degrees, gamma = 62.8(1)degrees, Z = 1) and (n-Bu4N)(2)[(Mo6B8i)(NCS)(6)(a)]. 2Et(2)O (2) (monoclinic, spacegroup P2(1), a = 11.483(3), b = 16.348(5), c = 20.059(6) Angstrom, beta = 95.44(3)degrees, Z = 2) have been performed. The via C coordinated cyano ligands of (1) reveal facial groups with (MoCN) angles of 168.0-171.5 degrees and 174.1 degrees-175.7 degrees. In (2) the via N coordinated isothiocyanato groups at the apical positions show MoNC-angles of 164.4 degrees, the equatorial angles are 172.7-173.5 degrees. Using the molecular parameters of the X-ray determinations the 10 K IR and Raman spectra of the (n-Bu4N) cluster salts are assigned by normal coordinate analyses based on a modified valence force field. The valence force constants are f(d)(MoMo) = 1.41 (CNa), 1.43 (NCSa), f(d)(MoBri) = 0.97 (CNa), 0.96 (NCSa), f(d)(MoC) = 1.62, f(d)(Mo-N) = 2.09 mdyne/Angstrom. [References: 11]
机译:通过在丙酮中用AgNO3处理[(Mo6Br8i)Br-6(a)](2-)并添加KCN或KNCS,六氰基和六异硫氰酸根衍生物[(Mo6Br8i)Y-6(a)](2-) = CN,NCS形成。 (Ph4P)(2)[(Mo6Br8i)(CN)(6)(a)]的X射线结构测定。 4H(2)O(1)(三斜面,空间群P1,a = 11.63(3),b = 11.85(1),c = 14.23(5)埃,alpha = 71.8(1)度,beta = 67.6(3)度,γ= 62.8(1)度,Z = 1)和(n-Bu4N)(2)[(Mo6B8i)(NCS)(6)(a)]。 2Et(2)O(2)(单斜晶系,空间群P2(1)/ n,a = 11.483(3),b = 16.348(5),c = 20.059(6)埃,beta = 95.44(3)度,Z = 2)已执行。 (1)的Via C配位氰基配体揭示了(MoCN)角为168.0-171.5度和174.1度-175.7度的面部组。在(2)中,在顶端位置的通孔N配位的异硫氰酸根合基团的MoNC角为164.4度,赤道角为172.7-173.5度。使用X射线测定的分子参数,通过基于修正的化合价场的正态坐标分析指定(n-Bu4N)簇盐的10 K IR和拉曼光谱。价常数为f(d)(MoMo)= 1.41(CNa),1.43(NCSa),f(d)(MoBri)= 0.97(CNa),0.96(NCSa),f(d)(MoC)= 1.62 ,f(d)(Mo-N)= 2.09mdyne /埃。 [参考:11]

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