苯甲酰羟胺—钼酰螯合物的分子结构及晶体结构

继苯甲酰羟胺—钨酰螯合物WO_2(C_7H_6O_2N)_2的晶体结构测定后,本文报导了整合物MoO_2(C_7H_6O_2N)_2·C_6H_(13)OH的结构和特性,并初步提出了酰羟胺类试剂用于钨钼分离的可能性。苯甲酰羟胺—钼酰螯合物的分子及晶体结构已由四园衍射仪测定,晶体属空间群C_(2h)~5—P2_1/c,晶胞参数a=9.142(1),b=21.591(3),c=11.662(3)A,β=90.31(1)°,Z=4,最终吻合因子R=0.079.虽然结构中结合的已醇分子无法定位,但它与螯合物分子间强烈的氢键键合作用,则是十分明显的,这很可能是影响苯甲酰羟胺对钨钼分离效果的重要因素之一。     

三氟醋酸钆的晶体结构

测定了[Gd(CFCOO)_3·3H_2O]_2的晶体结构属单斜晶系,空间群为P2_1/c.Z=2.晶胞参数a=9.192(3),b=18.890(1),c=9.785(3);β=113.84(2)°.[Eu_(0.1)Gd_(0.9)(CF_3COO))3·3H_2O]_2的光谱构分析表明稀土离子周围的局部对称性可能是C_2(C_s)和C_2h。     

十二员一氧三氮杂环配合物的研究——Ⅰ.1-氧-4,7,10-三氮杂环十二烷及其含钯加合物的合成、性质和结构

本文对合成的1-氧-4,7,10-三氮杂环十二烷和它的含钯加合物进行了元素、红外、核磁、质谱和热分析;并对加合物做了单晶结构测试。加合物晶体属正交晶系,空间群为P2_12_12_1;晶胞参数为a=10.474(2),b=11.632(2),c=14.674(3),AZ=4。结构的偏离因子R=0.052。加合物中,钯(Ⅱ)与四个氯形成平面四边形配位,以H_2PdCl_4分子存在,冠醚环上的一个N原子与HCl的H~+结合形成铵鎓离子,分子式为NHC_2H_4OC_2H_4N H_2C_2H_4NHC_2H_4C1·H_2PdC1_4·H_20.     

含四氮杂十四元大环配体过渡金属配正离子与双(N-氰基亚胺基二硫代甲酸)合镍负离子加合物的合成、表征和[Ni(hmtade)][Ni(cdc)_2]的晶体结构

合成了七个含四氮杂十四元大环配体过渡金属配正离子与双(N-氰基亚胺基二硫代甲酸)合镍负离子的加合物[ML][Ni(cdc)_2](cdc=N-氰基亚胺基二硫代甲酸根;L=hmtade,hmta,dmtade,tmtate;M=Cu,Ni,Zn),通过元素分析、红外光谱、电子光谱、磁化率和顺磁共振谱对加合物结构进行了表征.测定了[Ni(hmtade)][Ni(cdc)_2」的晶体结构,其晶体属单斜晶系,C2/c空间群,晶胞参数:a=1.1883(2),b=1.1753(2),c=2.0482(4)nm.α=90°,β=100.19(1)°,r=90°.V=2.8154nm~3,M_r=630.19.D_x=1.482g/cm~3,Z=4.对正负离子间的相互作用进行了讨论.     

碱土金属邻苯二甲酸盐的振动光谱

测定了CaPHT·H_2O和两种CaPHT的晶体结构,其空间群分别属于P2_1/c(C_(2h)~5,Z=4),P2_1/m(C_(2h)~2,Z=8)和 P2/m(C_(2h)~1,Z=6).研究了 CaPHT·H_2O、CaPHT(A)、CaPHT(B)、MgPHT、SrPHT 和 BaPHT 的 IR 及 CaPHT·H_2O 的拉曼光谱,讨论了固体样品中 PHT 与碱土金属离子的配位结构及其对光谱的影响.     

金属Schiff碱配合物的研究 Ⅰ.Ni(salen)与铵盐形成的加合物

用Ni(salen)与铵盐NH_4X(X=SCN、Cl、Br、I或I_3)在乙醇中反应,分别制得了如下组成的新化合物:2Ni(salen)·NH_4SCN、2Ni(salen)·NH_4Cl、2Ni(saien)·NH_4Br·C_2H_5OH、2Ni(salen)·NH_4I·C_2H_5OH和3Ni(salen)·2NH_4I_3·C_2H_5OH,并以热重、摩尔电导、磁化率、红外和紫外可见光谱等方法对加合物进行了性质表征.研究结果表明,在这些加合物中,Ni(salen)的四方平面结构仍然保持,没有形成新的轴向Ni—X配键.讨论了加合物中的一种新型键合方式,它是以Ni(salen)的酚氧与NH_4X中的铵离子形成氢键.     

[Nd_2O(C_5H_5)_6](C_12H_9N_2)3Cl·mC_4H_8O的晶体结构

本文报告用单晶X-射线衍射法测定[Nd_2O(C-5H_5)_6](C_(12)H_9N_2)_3C1·mC_4H_5O的晶体结构。晶体属于单斜晶系,空间群为P2-1/c,晶胞参数为a=20.982(15),b=11.217(7),c=32.954(32),β=104.17(7)°;Z=4。Nd和C1原子坐标用直接法定出,其他原子坐标以差Fourier方法求得,经过最小二乘法修正,R因子为0.159。在分子中三个茂环皆通过η~5。键与Nd原子配位,两个Nd原子间存在桥氧原子,因而形成(Nd_2O(C_5H_5)_6)~(2-)阴离子,Nd-C键基本上属于离子键。三个邻菲罗啉基团通过氢键与C1原子连接形成大的阳离子[(C_(12)H_9N_2)3-C1]~(2+)。     

12-钨磷酸二甲基胺盐的制备和结构研究

本文由12-钨磷酸与二甲基甲酰胺反应制备了12-钨磷酸二甲基胺盐[(CH)_3)_2NH_2]_3(PW_(12)O_(40))·nH_2O,用红外光谱和热重差热分析研究了化合物的性质,用X射线单晶结构分析测定了化合物的结构。晶体属单斜晶系,空间群为C_(2h)~3-C2/m,结晶学参数为:a=19.345(7),b=16.506(2),c=12.711(2)(?),β=101.83(2)°,V=3972.5(?)~3,Z=4,Dc=3.037g/cm~3。结构测定共收集了4414个独立衍射点,其中2917个I>3σ(I)独立可观察衍射点,结构用全矩阵最小二乘法修正后最后R=0.0856,R_w=0.1186。在分子结构中,杂阴离子为完整的α-Keggin型结构,三个二甲基胺阳离子位于一组W_3O_(13)三联体与其他三组W_3O_(13)三联体通过共顶点相连而形成的面上。由于阳离子与杂阴离子骨架氧之间的氢键作用。致使WO_6八面体发生较大的畸变,与阳离子发生氢键作用的WO_6八面体中的W-O键显著减弱,在红外光谱中表现为υ_(W-O)吸收峰的分裂。     

含烯烃配体的过渡金属卡宾配合物的研究 Ⅱ.异戊二烯二羰基[乙氧基(芳基)卡宾]铁配合物的异构化产物的合成、波谱和结构研究及四羰基[乙氧基(五氯苯基)卡宾]铁的晶体结构

异戊二烯三羰基铁(1)与芳基锂ArLi(Ar=C_6H_5,p-CH_3C_6H_4,p-CH_3OC_6H_4,p-CF_3C_6H_4)在低温下反应,再用Et_3OBF_4烷基化,可获得组成为C_5H_8(CO)_2FeC(OC_2H_5)Ar的标题化合物的异构化产物(2—5).当用LiC_6Cl_5作亲核试剂,在相同条件下与1反应时,只生成已知的配合物(CO)_4FeC(OC_2H_5)C_6cl_5(6).由单晶X射线衍射数据推断出,2和6的分子结构都属于单斜晶系,Z=4.2的空间群为C_(2h)~5-P_2(1/n),α=8.544(2),b=14.494(5),c=12.309(4)A,β=96.16(2)°;6的空间群为C_(2h)~5-P2_(1/c),a=14.126(3),b=6.805(1),c=19.182(5)A,β=103.58(2)°.2和6的结构用SHELXTL直接法程序解出并经块矩阵最小二乘法修正,R分别为0.066和0.043.     

铕(Ⅲ)的β—双酮—邻菲绕啉混配配合物的合成、晶体结构和红外光谱

合成了1,3-二苯基-4-乙酰吡唑酮-5[Hl)PAP=C_(17)H_(14)N_2O_2]邻菲绕啉[phen=C_(12)H_8N_2]配铕的混配合物Eu(DPAP)_3·(o-phen);并测定、讨论其晶体结构和150—4000cm~(-1)范围的红外光谱。 晶体Eu(DPAP)_3(o-phen)属单斜晶系;空间群为C_2~6h—C2/c;Z=8;晶胞参数a=23.021(15),b=22.988(11),c=23.549(9),β=109.27(4)°,V=11761(10);F(000)=4527.00,μ=11.28cm~(-1)(Mo靶)。     

希夫碱配合物的研究——Ⅵ.K[Fe(acaccn)(CN)2]·2H2O的合成及晶体结构

制备了K[Fe(acaccn)(CN)₂]·2H₂O.并测定了晶体结构.     

Complexation with diol host compounds. Part 14. Inclusion compounds of 2,2′-bis(9-hydroxy-9-fluorenyl)biphenyl with acetonitrile,cyclohexanone, di-n-propylamine and dimethylformamide

Abstract

The structures of the inclusion compounds of 2,2′-bis(9-hydroxy-9-fluorenyl)biphenyl (H) with acetonitrile (1) (1:1), cyclohexanone (2) (1:2), di-n-propylamine (3) (1:1) and dimethylformamide (4) (1:2) are reported. Crystal data: (1) monoclinic, P2₁/c with a=10.500(3), b=15.598(3), c=18.344(3) Å, β=96.66(2)°, Z=4, D _C=1.24 g cm^?3. (2) monoclinic, P2₁/c with a=13.980(3), b=11.768(5), c=23.49(1) Å, β=98.77(3)°, Z=4, D_c =1.24 g cm^?3. (3) monoclinic, C2/c with a=29.57(1), b=13.485(4), c=18.17(1) Å, β=107.94(4)°, Z=8, D _C=1.16 g cm^?3. (4) monoclinic, C2/c with a=30.123(9), b=13.391(6), c=19.177(6) Å, β=111.23(4)°, Z=8, D _C=1.22 g cm^?3. Final R values for the four structures were 0.065, 0.120, 0.084 and 0.107 for 2937, 2830, 2071 and 3769 reflections, respectively. The host conformation is quite rigid and does not appear to be influenced by the shape and size of the guests studied. The host is held in a spiral conformation by means of an intramolecular hydrogen bond. In addition, host-guest hydrogen bonds are observed in all structures. Thermal analysis was used to evaluate the strength of binding of the guest molecules and confirmed that (1) is the most stable of the four compounds studied.     

Manifestations of noncovalent interactions in the solid state. Dimeric and polymeric self-assembly in imidazolium salts via face-to-face cation—cation π-stacking

Abstract

X-ray crystallographic investigation of the tertiary structure of simple 1-methylimidazolium (1-Meim) salts reveals that cation—cation face-to-face π—stacking with interplanar separations in the range typically seen for molecule—molecule and molecule—cation interactions are possible. Two salts are reported. 1-Meim-CF₃SO₃, 1, exists as a centrosymmetric dimer with an interplanar separation of only 3.16 Å. The two imidazolium rings are slipped to the extent that the interaction can be regarded as a manifestation of C—H…C—H dipole interactions. 1-Meim-NO₃ exists as a one-dimensional (1-D) polymer with interplanar separations of 3.65 Å. The cations are not as severely slipped as for 1 and the interactions can be regarded as the result of cation—cation and anion—anion complementary electrostatics. Semi-empirical calculations are used to rationalize the π-π stacking in both 1 and 2. Crystal data: 1-Meim-CF₃SO₃, 1, triclinic, P1, a=6.416(3) Å, b=7.617(4) Å, c=9.569(4) Å, α=85.36(4)°, β=86.08(3)°, γ=85.18(4)°, V=463.6(4) Å,³ Z=2, D_c =1.66 g cm^?3, μ=3.7 cm^?1, T=17°C, R=0.054 and R _w=0.076 for 1241 reflections; 1-Meim-NO₃, 2, monoclinic, P2₁/c, a=9.009(7) Å, b=9.988(6) Å, c=7.308(5) Å, β=94.93(6)°, V=655.2(8) Å,³ Z=4, D_c =1.47 g cm^?3, μ=1.2 cm^?1, T=17°C, R=0.060 and R _w=0.068 for 483 reflections.     

Crystal and molecular structure of (μ-p-CH3C6H4C2S) (μ-n-C3H7S)Fe2(CO)6Co2(CO)6

The crystal and molecular structure of the complex containing cobalt-carbon and iron-sulfur cluster cores, (μ-p-CH₃C₆H₄C₂S) (μ-n-C₃H₇S)Fe₂(CO)₆Co₂(CO)₆, has been determined by X-ray diffraction method. The crystals are triclinic, space group P&1bar;, with a — 9.139(2), b=9.610(1), c-17.183(2) Å, α = 84.36(1), β-89.45(1), γ=88.15(1)°, V-1501.0 ų; Z=2, D_c=1.74 g/cm³. R=0.072, Rw=0.081. The results of the structure determination show a cobalt-carbon cluster core formed through the reaction of (μ-p-CH₃C₆H₄C₂S)(μ-n-C₃H₇S)Fe₂(CO)₆ with Co₂(CO)₈. In the cobalt-carbon cluster core, the bond length of the original C≡C lengthened to 1.324 Å which is close to the typical value of carbon-carbon double bond. The groups connecting the carbons of the cluster core are in cis position and lie on the opposite side of cobalt atoms. In this complex, the conformation of —SC₃H₇ is e-type, while that of —SC₂C₆H₄CH₃ is a-type.     

Mononuclear Complexes of Cr(II) and Fe(II) with Terminal -SH Groups. Synthesis and X-Ray Crystal Structures of trans-M(SH)2(dmpe)2 (M = Cr,Fe; dmpe = 1,2-Bis(Dimethylphosphino)Ethane)

Abstract

The reaction of two equivalents of NaSH with MCl₂(dmpe)₂ (M = Cr, Fe,) at—78°C gives trans-M(SH)₂(dmpe)₂ (M = Cr, (1), 30%; Fe, (2) 98%). The complexes have been characterized spectroscopically, and the trans geometry has been confirmed by single crystal X-ray diffraction studies. Crystal data (1): C₁₂H₃₄CrP₄S₂, M= 418.42, monoclinic, P2₁/n, a = 8.857 (I), b= 12.719 (2), c = 9.648 (I) Å, β = 92.14(1)°, U= 1086.2 (5)Å, D _c = 1.279gcm^?3, Z = 2, λ(MoK_a) = 0.71073 Å, (graphite mono-chromator), μ(MoK_a) = 9.80cm^?1. Methods: MULTAN, difference Fourier, full-matrix least-squares. Refinement of 1149 reflections (I > 3σ(I)) out of 1901 unique observed reflections (3.0° < 29 < 48.0°) gave R and R _w values of 0.092 and 0.096, respectively. Crystal data (2): C₁₂H₃₄FeP₄S₂, M = 422.28, monoclinic, P2₁/n, a = 8.834 (2), b = 12.594 (2), c = 9.532 (2) Å, β = 90.66 (2)°, U = 1060.3 (5) ų, D _c = 1.323 g cm^?3, Z = 2, γ(MoK_a) = 0.71073 Å, (graphite monochromator), μ(MoK_a) = 11.87 cm^?1. Methods: same as for (1). Refinement of 1178 reflections (I > 3σ (I)) out of 2086 unique observed reflections (2.0° < 20 < 50.0°) gave R and R _w values of 0.056 and 0.059, respectively.     

Crystal structure of α-gutta percha: Modification of the constrained least-squares method

The crystal structure of α-gutta percha has been determined by x-ray diffraction. The unit cell parameters are a = 7.98 Å, b = 6.29 Å, c (fiber period) = 8.77 Å, and β = 102.0° (monoclinic). The space group is P2₁/c–C_2h⁵. Two molecular chains of nearly trans-CTS-trans-CTS? conformation pass through a unit cell; C, T, S, and S? being the cis, trans, and two types of skew forms, respectively. The constrainedle astsquares method was modified so that the order of the least squares matrix could be reduced and was applied to the refinement of the crystal structure.     

Synthesis and crystal structure of azafulgides

Two azafulgides were synthesized and their crystal structures determined by a single crystal X-ray diffraction analysis. The substances crystallized in the following symmetries and cell parameters. C₂₃H₁₉NO₃( 2 ): triclinic space group P&1bar; with a = 7.243(2). b = 10.981(6) and c = 12.672(8)Å, α = 80.40(5)°, β = 75.58(4)° and γ = 77.32(3)° Z = 2; C₁₉H₁₉NO₃( 1 ): orthogonal space group C_2v⁹-Pmc2₁ with a = 8.079(8), b = 12.752(9) and c = 15.752(13)Å, Z=4. The calculated densities are 1.26 and 1.27 g/cm³ respectively for 2 and 1 . The crystal structures were determined by direct methods. The least-squares refinement led to R values of 0.044 and 0.058 for 2 and 1 for 2738 and 952 reflections with I > 3σ-(I) respectively.     

Syntheses,structural determination,and binding studies of nine-coordinate multinuclear (mnH)2[EuIII(egta)]2·6H2O and binuclear (mnH)4[EuIII2(dtpa)2]·6H2O

Two lanthanide complexes, (mnH)₂[Eu^III(egta)]₂·6H₂O (1) (H₄egta = ethyleneglycol-bis-(2aminoethylether)-N,N,N′,N′-tetraacetic acid) and (mnH)₄[Eu^III₂(dtpa)₂]·6H₂O (2) (H₅dtpa = diethylenetriamine-N,N,N′,N″,N″-pentaacetic acid), have been synthesized and characterized by FT-IR spectroscopy, thermal analysis, and single-crystal X-ray diffraction. X-ray diffraction reveals that 1 is multinuclear nine-coordinate and crystallizes in the monoclinic crystal system with space group C2/c. The obtained cell dimensions are a = 38.513(3)?Å, b = 13.5877(8)?Å, c = 8.7051(5)?Å, β = 99.6780(10)°, and 4490.6(5)?ų. Each methylamine (mnH⁺) cation in 1, through hydrogen bonds, connects three adjacent [Eu^III(egta)]^? anions. The [Eu^III(egta)]^? anions connect one another forming a 1-D multinuclear zigzag chain structure along the c-axis. Complex 2 is nine-coordinate binuclear structure with tricapped trigonal prismatic conformation and crystallizing in the monoclinic crystal system, but with space group P2₁/n. The obtained cell dimensions are a = 9.9132(8)?Å, b = 24.1027(18)?Å, c = 10.7120(10)?Å, β = 109.1220(10)°, and 2418.2(3)?ų. For 2, there are two kinds of methylamine cations (mnH⁺) connecting [Eu^III₂(dtpa)₂]^4? complex anions and lattice waters through hydrogen bonds, leading to formation of a 2-D ladder-like layer structure.     

Structure,Magnetic and Spectral Properties of Ethyl Phosphite Nitrate Tri(1,10-phenanthroline) Nickel(II) Solvate Trihydrate: [Ni(phen)3]NO3·C2H5OP(O)O·3H2O

The compound, [Ni(phen)₃]NO₃ · C₂H₅OP(O)O · 3H₂O, was obtained by the reaction of Ni(NO₃)₂, C₂H₅OP(OH)₂ and 1,10-phenanthroline in 95% EtOH solution, and was characterized using IR and UV spectra and magnetic susceptibility measurements over the temperature range 75-300 K. The red crystal is triclinic of space group P&1macr;, with lattice parameters a = 12.462(3), b = 13.416(3), c = 13.422(3) Å, f = 75.88(3), g = 64.75(3), n = 65.87(3)°, and Z = 2. The coordinated cation contains a six-coordinate nickel atom chelated by three phenanthroline ligands, resulting in a distorted octahedral arrangement with the six Ni-N distances ranging from 2.086(2) to 2.113(3) Å. In addition to the nickel coordination complex, there are two anions, NO₃ and C₂H₅OP(O)O^-, and three water molecules which complete the crystal structure. In the solid state, the title compound forms a three dimensional network structure through hydrogen bonds. The intermolecular hydrogen bonds connect the [Ni(phen)₃]²⁺, NO₃, C₂H₅OP(O)O^- and H₂O molecules.     

Seltenerdhalogenide Ln4X5Z. Teil 1: C und/oder C2 in Ln4X5Z

Rare Earth Halides Ln₄X₅Z. Part 1: C and/or C₂ in Ln₄X₅Z The compounds Ln₄X₅C_n (Ln = La, Ce, Pr; X = Br, I and 1.0 < n < 2.0) are prepared by the reaction of LnX₃, Ln metal and graphite in sealed Ta‐ampoules at temperatures 850 °C < T < 1050 °C. They crystallize in the monoclinic space group C2/m. La₄I₅C_1.5: a = 19.849(4) Å, b = 4.1410(8) Å, c = 8.956(2) Å, β = 103.86(3)°, La₄I₅C_2.0: a = 19.907(4) Å, b = 4.1482(8) Å, c = 8.963(2) Å, β = 104.36(3)°, Ce₄Br₅C_1.0: a = 18.306(5) Å, b = 3.9735(6) Å, c = 8.378(2) Å, β=104.91(2)°, Ce₄Br₅C_1.5: a = 18.996(2) Å, b = 3.9310(3) Å, c = 8.282(7) Å, β = 106.74(1)°, Pr₄Br₅C_1.3: a = 18.467(2) Å, b = 3.911(1) Å, c = 8.258(7) Å, β = 105.25(1)° and Pr₄Br₅C_1.5: a = 19.044(2) Å, b = 3.9368(1) Å, c = 8.254(7) Å, β = 106.48(1)°. In the crystal structure the lanthanide metals are connected to Ln₆‐octahedra centered by carbon atoms or C₂‐groups. The Ln₆‐octahedra are condensed via opposite edges to chains and surrounded by X atoms which interconnect the chains. A part n of isolated C‐atoms is substituted by 1‐n C₂‐groups. The C‐C distances range between 1.26 and 1.40Å. In the ionic formulation (Ln³⁺)₄(X^?)₅(C^4?)_n(C₂^m?)_1?n·e^? with 0 < n < 1 and m = 2, 4, 6 (C₂^2?, C₂^4? C₂^6?), there are 1 < e^? < 5 electrons centered in metal‐metal bonds.