共查询到17条相似文献,搜索用时 109 毫秒
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三(2-苯并咪唑亚甲基)胺合锰的结构和量化计算 总被引:2,自引:0,他引:2
合成了三 ( 2 苯并咪唑亚甲基 )胺合锰 (II) (C48H5 0 N1 4 O4Mn2 Cl4) ,采用X射线单晶衍射方法测定了晶体结构 ,并进行了量子化学计算 .晶体属于单斜晶系 ,空间群P2 1 /C ,晶胞参数 :a =1 4 2 38( 7)nm ,b =2 4 80 2 ( 3)nm ,c =1 6 977( 7)nm ,β =92 51( 4)° ,V =5 9893nm3 ,Z =4 用重原子法及傅里叶合成方法解出结构 ,最终R值为 0 0 7 Mn2 处于变形三角双锥配位环境中 .量子化学计算表明配体具有负电荷空穴 ,使其易于与金属离子配位 相似文献
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三(2-苯并咪唑亚甲基 )胺合钴(Ⅱ)配合物的合成和分子结构 总被引:3,自引:0,他引:3
三 (2-苯并咪唑亚甲基 )胺 (NTB)与氯化钴(Ⅱ)在乙醇中反应生成配合物 C_(24)H_(21)N_7CoCl。在二甲亚砜溶剂中,经缓慢挥发获得其单晶 Co(NTB)Cl· 3[(CH_3)_2SO]。晶体属三斜晶系,空间群 P-1,a=0.9678(3), b=1.1780(5),c=1.6102(9)nm,α=71.07(8),β=89.27(8),γ=84.81(3)° ,V=1.729(2)nm~3,Z=2,Dc=1.408g· cm~(-3),Mr=733.24,F(000)=762,μ =0.7864mm~(- 1)。用 1825个 I≥ 3σ (I)的独立衍射点进行结构解析与修正,最终偏离因子 R=0.068, Rw=0.072。晶体中 Co(Ⅱ)与 NTB上的四个 N原子及一个氯离子配位,形成一个五配位的轻微扭曲的三角双锥构型。 相似文献
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A novel benzimidazole derivative, 1,3-dimethyl-2-ferrocenylmethylbenzimidazolium iodide (1) was synthesized and characterized by elemental analysis, MS, IH NMR and IR spectra. Its crystal structure was determined by X-ray single crystal diffraction, and the title compound belongs to monoclinic system with space group P2(1)/c. According to the crystal structure, the quantum chemistry calculation was performed by Gaussian 03 program, and full geometry optimizations of the title compound were carried out with DFT method at B3LYP/6-31G level. Its structure, stability, frontier molecular orbital components and net charge distribution were discussed. 相似文献
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合成了一水合高氯酸三(2-苯并咪唑亚甲基)胺合钴(Ⅱ)配合物,用单晶X- 射线衍射方法测定了它们的晶体结构.测定结果表明,该配合物属正交晶系,Pbcn(No.60) 空间群.晶胞参数a=19.393(9),b=18.232(8),c=17.052(8),α=β=γ=90.000(1)°,V=602 9.33,Z=8,最终偏离因子R1=0.156.配合物中的金属Co(Ⅱ)原子与配体NTB分子中的四个氮原子和高氯酸根中的一个氧原子形成扭曲三角双锥构型. 相似文献
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制备了2-氯甲基苯并咪唑硝酸盐(C8H8N2Cl+·NO3-)化合物,采用元素分析,IR, 1H NMR和TG-DTA对产物进行了表征,并采用X射线单晶衍射仪测定了该化合物的晶体结构,该化合物属单斜晶系,空间群P21/n, a=0.74189(3) nm, b=1.53064(6) nm, c=1.05478(3) nm, β=120.930(2)º, V=1.02744 nm3, Dc=1.484 g/cm3, Z=4, F(000)=472, μ=0.363 mm-1, R=0.0659, wR=0.1498, GOF=0.840.在此基础上,采用量子化学方法,在MP2/6-311G**, B3LYP/6-311G**和HF/6-311G**水平上计算了2-氯甲基苯并咪唑及其质子化阳离子的优化构型、电荷分布、振动光谱、热力学函数及总能量.计算结果显示2-氯甲基苯并咪唑环具有较强质子化能力,这与晶体结构结果相一致. 相似文献
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合成了一水合高氯酸三(2-苯并咪唑亚甲基)胺合钴(Ⅱ)配合物,用单晶X- 射线衍射方法测定了它们的晶体结构.测定结果表明,该配合物属正交晶系,Pbcn(No.60) 空间群.晶胞参数a=19.393(9),b=18.232(8),c=17.052(8),α=β=γ=90.000(1)°,V=602 9.33,Z=8,最终偏离因子R1=0.156.配合物中的金属Co(Ⅱ)原子与配体NTB分子中的四个氮原子和高氯酸根中的一个氧原子形成扭曲三角双锥构型. 相似文献
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一水合硝酸三(2—苯并咪唑亚甲)胺合锌(Ⅱ)的合成及晶体结构 总被引:1,自引:1,他引:0
合成了三(2-苯并咪唑亚甲基)胺(简称NTB)及一水合硝酸三(2-苯并咪唑亚甲基)胺合锌(Ⅱ)C26H23N9O7Zn。由红外光谱分析得出锌(Ⅱ)与配体中的氮发生配位。其单晶体属于四方晶系,空间群为I42d(NO.122),晶胞参数为a=22.349(3)b=22.349(3)c=22.255(4)。晶体结构由直接法解出,R=0.061。分子由NTB和锌(Ⅱ)及一分子水、两个硝酸根组成。整个分子呈现不规则的C3v对称特点,配合物中锌(Ⅱ)的配位构型为扭曲的三角双锥。 相似文献
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环状二聚三(邻甲基苄基)氢氧化锡的合成、结构及量子化学研究 总被引:4,自引:0,他引:4
三(邻甲基苄基)锡氯化锡在氢氧化钠溶液中水解, 合成了环状二聚三(邻甲基苄基)氢氧化锡, 经X射线衍射方法测定了化合物的晶体结构, 属三斜晶系, 空间群为P-1, 晶体学参数: a=1.00530(18) nm, b=1.03580(18) nm, c=1.08182(18) nm, α=90.151(3)°, β=108.317(3)°, γ=94.871(3)°, V=1.0650(3) nm3, Z=1, Dc=1.380 g/cm3, m(Mo Kα)=0.1205 cm-1, F(000)=451, R1=0.0330, Rw=0.0822. 化合物为由Sn2O2构成的平面四元环结构, 锡原子为五配位的三角双锥构型. 对其结构进行量子化学从头计算, 探讨了化合物的稳定性、分子轨道能量以及一些前沿分子轨道的组成特征. 相似文献
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SynthesisandCrystalStructureof[Tris(2-benzimidazylmethyl)amine][Imidazole]Copper(Ⅱ)PerchlorateZhouWei-Hong;LiuXiao-Lan;MiaoFa... 相似文献
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利用吡啶-3-甲酸与Cy3SnOH反应合成了[(C5H4N)COOSnCy3]n,经元素分析、1H NMR、IR和X-射线衍射表征分子结构。在该配合物的结构中,中心Sn原子呈现五配位畸变三角双锥构型,并通过分子间的N→Sn配位形成一维链状线型聚合物,分子链间的C-H…O氢键作用将配合物分子组装成三维超分子网络结构。利用量子化学G03W软件,在LANL2DZ基组对配合物的稳定性、前沿分子轨道组成及能量进行研究。热重分析表明该化合物在273℃开始发生分解。 相似文献
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1INTRODUCTION Investigation of the coordination chemistry of copper(II)continues to be stimulated by interest in developing modes for copper proteins and in under-standing the factors which give rise to the seemingly infinite variety of distortions from regular stereo-chemistry observed in Cu(II)complexes[1,2].For more than decades,due to the unique coordination polyhedra and their easy preparation,tripodal copper complexes have attracted much attention in addition to their special chemi… 相似文献
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A novel metal-organic complex Cu(p-FBA)2(phen)(H2O) (p-FBA = p-fluorobenzoic acid,phen = 1,10-phenanthroline) has been synthesized and structurally characterized by X-ray single-crystal diffraction,elemental analysis and IR spectra. The crystal belongs to triclinic,space group P1 with a = 7.8043(7),b = 10.4069(9),c = 14.3658(13) ,α = 105.3170(10),β = 96.877(2),γ = 96.7580(10)o,V = 1103.56(17) 3,Mr = 539.96,Z = 2,Dc = 1.625 g/cm3,μ = 1.050 mm-1,F(000) = 550,the final R = 0.0324 and wR = 0.0952. In the crystal,the structure consists of discrete molecules containing a five-coordinate copper(Ⅱ ) in a distorted square pyramidal configuration. Intramolecular O-H···O hydrogen bonds,weak intermolecular C-H···O hydrogen bonds and π-π stacking link the molecules into a one-dimensional chain structure. The study on the title complex has been performed with quantum chemistry calculation by means of G03W package on the Lanl2dz basis set. The stabilities of the complex together with the orbital energies and composition characteristics of some frontier molecular orbitals have been investigated. 相似文献
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二维配位聚合物[Mn(FA)2(4,4′-bipy)]n的合成、晶体结构及量子化学研究 总被引:1,自引:0,他引:1
A novel manganese coordination polymer [Mn(FA)2(4,4′-bipy)]n(HFA=2-furancarboxylic acid, 4,4′-bipy=4,4′-bipyridine) has been synthesized by hydrothermal methods. The crystal structure was determined by single-crystal X-ray diffraction. The crystal is of monoclinic, space group C2/c with a=1.698 4(3) nm, b=1.168 6(2) nm, c=1.009 5(17) nm, β=109.455(11)°, V=1.889 2(6) nm3, Z=4, Dc=1.523 g·cm-3, Mr=433.27, F(000)=884, μ=0.740 mm-1, R1=0.028 2 and wR2=0.071 0. In the crystal, the manganese atom is six-coordinated by two nitrogen atoms from 4,4′-bipyridine and four oxygen atoms from furancarboxylic acid molecules, completing an octahedral geometry. The 4,4′-bipyridine molecules are connected to the infinite chain [Mn(FA)2]n to form a two-dimensional layer. The quantum chemistry calculation on the title complex has been performed by means of G98W package and taking Lanl2dz basis set. CCDC: 296763. 相似文献