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首页> 外文期刊>Zeitschrift fur Anorganische und Allgemeine Chemie >Synthesis, Crystal Structures, and Vibrational Spectra of [(Ph_3P)_2N]_2[(W_6Cl_8~i)I_6~a] centre dot 2Et_2O centre dot 2CH_2Cl_2 and [(Ph_3P)_2N]_2[(W_6Cl_8~i)(NCS)_6~a] centre dot 2CH_2Cl_2
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Synthesis, Crystal Structures, and Vibrational Spectra of [(Ph_3P)_2N]_2[(W_6Cl_8~i)I_6~a] centre dot 2Et_2O centre dot 2CH_2Cl_2 and [(Ph_3P)_2N]_2[(W_6Cl_8~i)(NCS)_6~a] centre dot 2CH_2Cl_2

机译:[(Ph_3P)_2N] _2 [(W_6Cl_8〜i)I_6〜a]中心点2Et_2O中心点2CH_2Cl_2和[(Ph_3P)_2N] _2 [(W_6Cl_8〜i)(NCS)_6的合成,晶体结构和振动光谱〜a]中心点2CH_2Cl_2

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摘要

By treatment of [(W_6Cl_8~i)I_6~a]_(2-) with (SCN_2) in dichloromethane at -20 deg C the hexaisothiocyanato cluster anion [(W_6Cl_8~i)(NCS)_6~a] ~(2-) is formed. X-ray structure determinations have been performed on single crystals of [(Ph_3P)_2n]_2[(W_6Cl_8~i)I_6~a] centre dot 2CH_2Cl_2 centre dot 2Et_2O (1) (triclinic, space group P1-bar, a = 10.324(5), b = 14.908(3), c = 17.734(8) A, #alpha# = 112.78(2) deg , #beta# = 99.13(3) deg, #gamma# = 92.02(3) deg C, Z = 1). The thiocyanate ligands of 2 are bound exclusively via N atoms with W-N bond lengths of 2.091-2.107 A, W-N-C angles of 173.1-176.9 deg and N-C-S angles of 178.1-179.3 deg C. The vibrational spectra exhibit characteristic innerligand vibrations at 2067-2045 (v_(CN)), 879-867 (V_(CS)) and 490-482 (#delta#_(NCS)). Based on the molekular parameters of X-ray determination of 1 the vibrational spectra of the corresponding (n-Bu_4N) salt of 1 are assigned by normal coordinate analysis. The valence force constants are f_d(WW) = 1.61, f_d(WI) = 1.23 and f_d(WCl) = 1.10 mdyn/A.
机译:通过在二氯甲烷中于-20℃用[SCN_2]处理[(W_6Cl_8〜i)I_6〜a] _(2-),六异硫氰酸根团簇阴离子[(W_6Cl_8〜i)(NCS)_6〜a]〜(2- ) 形成了。已经对[[Ph_3P)_2n] _2 [(W_6Cl_8〜i)I_6〜a]中心点2CH_2Cl_2中心点2Et_2O(1)的单晶进行了X射线结构测定(三斜晶系,空间群P1-bar,a = 10.324 (5),b = 14.908(3),c = 17.734(8)A,#alpha#= 112.78(2)度,#beta#= 99.13(3)度,#gamma#= 92.02(3)度, Z = 1)。 2的硫氰酸盐配体仅通过N原子键合,WN键长为2.091-2.107 A,WNC角为173.1-176.9度,NCS角为178.1-179.3度。振动光谱在2067-2045年表现出特征性内配体振动( v_(CN)),879-867(V_(CS))和490-482(#delta #_(NCS))。基于X射线测定1的分子参数,通过正态坐标分析分配了相应的(n-Bu_4N)1盐的振动光谱。化合价常数为f_d(WW)= 1.61,f_d(WI)= 1.23和f_d(WCl)= 1.10 mdyn / A。

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