四核银原子簇化合物Ag_4(α-C_(10)H_7CS_2)_4(Py)_4·2Py的晶体结构

四核银原子簇化合物Ag_4(α-C_(10)H_7CS_2)_4(Py)_4·2Py由α-萘荒酸与硝酸银在有机溶剂中反应,经吡啶重结晶获得单晶。由于反应中采用不同的银盐与α-萘荒酸的投料比(1:2与1:4),得到了两种颜色的晶体(甲和乙)。用X射线单晶衍射法测定了它们的晶体结构。晶体甲的空间群为C_(2h)~5—P2_1/a。晶胞参数:a=2.2822(4)(?),b=12.803(4)(?),c=24.444(7)(?),β=103.90(2)°,V=6933.14(?)~3,Z=4。晶体乙的空间群为c_(2h)~6—c2/c。晶胞参数:a=29.150(2)(?),b=12.789(3)(?),c=24.413(2)(?),β=130.56(4)°,V=6914.38(?)~3,Z=4。Ag_4(α-C_(10)H_7CS_2)_4(Py)_4在两种晶体中的空间构型基本相同,差别只在于分子的对称性上。晶体乙中,分子处在二重轴上,分子的对称性较高。本文只报道晶体乙的结构测定和结构参数.3338个反射参与修正,最终的偏差因子R=0.093。分子中Ag_4呈压扁的四面体构型。六个Ag—Ag距离可分成两类,硫桥相连的Ag—Ag平均键长为2.924(?)(2.875—2.972(?)),表明有相当程度的金属键相互作用。不与硫桥相连的Ag—Ag距离为3.563(?)。     

PVC的热解/红外(Py/FTIR)研究

采用热解／红外联用仪（Py/FTIR)考察了PVC的热解过程，结果表明，PVC在200℃时开始放出HCl,300℃左右达到最大，在红外谱图上HCl气体的振－转吸收区是3100cm^-1～2600cm^-1，有P支和R支出现；随后－CH2－基在2860cm^-1和2930cm^-1处的吸收明显增强，可认为是生成的多烯碎片进一步裂解生成脂肪族化合物的结果；同时有芳烃在1620cm^-1、3010cm^-1和900cm^-1～600cm^-1处的吸收出现。这是由于除了部分多烯碎片规则断裂形成酯肪烃类物质的挥发分外，还有一部分通过分子重排、环化形成芳烃结构，其中的一部分以芳烃类物质进入挥发分，另一部分聚合形成稠环芳香族物质，最后变成焦粒。通过上述研究，提出了PVC的热解机理，即PVC首先脱出HCl气体，进一步热解产生多烯结构，并通过分子重排、环化形成芳烃结构。     

配位聚合物[Ni(Hsal)2(Py)2]n(Hsal=水杨酸根,Py=吡啶)的合成,表征和晶体结构

用水杨酸和吡啶与Ni(ClO4)26H2O 合成了一个新颖配位聚合物[Ni(Hsal)2(Py)2]n。对配合物进行了X射线衍射结构表征, C24H20N2NiO6, Mr = 491.13, 晶体属三斜晶系, P 空间群, 晶胞参数: a = 7.372(2), b =10.852(2), c = 14.728(3) ? a = 108.36(3), b = 93.83(3), g = 103.67(3), V = 1073.7(4) ?。F(000) = 508, m = 0.949mm-1, Z = 2, Dc = 1.519 g/cm3。最后修正到R = 0.0390, wR = 0.0772。配合物中Ni为五配位, 呈四方锥构型。配合物中2个水杨酸根的配位方式不一样, 其中一个水杨酸根作为双齿桥连配体, 使配合物呈一维链状结构。水杨酸苯环的-堆积作用和分子间的氢键作用, 又使配合物呈二维网络结构。     

THE CRYSTAL STRUCTURE OF A NOVEL TETRANUCLEAR SILVER CLUSTER COMPLEX Ag_4(α-C_(10)H_7CS_2)_4(Py)_4·2Py

The title compound has been synthesized by the reaction of α-dithionaphthoic acidwith AgNO_3 in an organic solvent. The single crystals were obtained by recrystallizingfrom pyridine. We obtained two kinds of crystal with different colours (A and B), usingdifferent ratios of silver nitrate and α-dithionaphthoic acid (1:2,1:4) in the reactions. The structures of the two kinds of crystal were determined by a single-crystal X-raydiffraction analysis. The crystal (A) belongs to monoclinic space group C_(2h)~5-P2_1/a withunit cell parameters: a = 22.822(4) A, b = 12.803 (4) A, c = 24.444 (7) A, β = 103.90 (2)°V = 6933.14 A~3, Z = 4. The crystal (B) belongs to monoclinic space group C_(2h)~6-C2/c witha = 29.150 (2) A, b = 12.799 (3) A, c = 24.413 (2) A, β = 130.56 (4)°, V = 6914.38 A~3,Z = 4. Both crystals (A) and (B) have the same molecular configuration, but they havedifferent symmetry. In crystal (B), the molecule possesses a C_2 symmetry. This paperreports the structure determination and parameters o     

STUDY ON OXO-CENTERED HETEROTRINULEAR TRANSITION METAL CARBOXYLATE COMPLEXES: Ⅱ. CRYSTAL STRUC TURES OF COMPOUNDS [Fe_2MnO(O_2CCH_3)_6Py]·Py AND [Fe_2CoO (O_2CCH_3)_6Py3]·Py

<正> The title compounds are isomorphous, they belong to trigonal space group R32, with crystallographic parameters: [Fe2MnO(O2CCH3)6Py3] ·Py: Mr = 853. 31, a = 17. 609(3), c=11. 056(3)(?), V = 2968. 9(?)3, Z = 3, Dc=1. 43 gcm-3, μ(MoKα) = 10. 9 cm-1, F (000) = 1317; [Fe2CoO(O2CCH3)6Py3]·Py: Mr = 857. 30, a = 17. 542(3), c=11. 049(2)(?), V = 2944. 8(?)3, Z = 3, Dc=1. 45 gem-3, μ (MoKα) = 12. 07 cm-1, F (000) = 1323. The structure of [Fe2MnO (O2CCH3)6Py3]·Py has been determined with the final R = 0. 042 for 663 reflections. The three crystallographically equivalent metal atoms form an equilateal triangle with side of 3. 324(?). The central oxygen aotm is on the three - fold axis with M - O distance 1. 919(?). The planar M3O core is normal to the three -fold axis and also to the solvate pyridine, which is dynamically disordered round this axis and is sandwiched by two Fe2MnO(O2CCH3)6Py3 molecules.     

Thermal Decomposition of B(C6F5)3·Py Complex

Russian Journal of General Chemistry - The crystal structure of the new polymorphic modification of B(C6F5)3·Py complex was determined. It was shown by a static tensimetric method using a...     

C70(OsO4Py2)3配合物的合成和表征

自从1985年Kroto等[1,2]发现富勒烯(球烯)以来,在化学、物理和材料等领域逐渐地形成了富勒烯的研究热潮,现在人们正将较多注意力投向富勒烯的各类衍生物结构与性能之间内在联系规律的研究,以期望在开发应用方面取得更大的进展,为此也更加重视对具有特殊组成与结构的富勒烯衍生物的研究.本文首次合成并表征了C70(OsO4PY2)3配合物,推测了其可能的结构.     

Coordination Chemistry and Methylation of Mixed-Substituted Tetraphosphetanes (RP−PtBu)2 (R=Ph,Py)

Synthesis of mixed-substituted tetraphosphetanes (RP−PtBu)₂ (R=Ph ( 4 ), Py ( 5 ); Py=2-pyridyl) is achieved from the condensation of dipyrazolylphosphanes RPpyr₂ (R=Py ( 1 ), Ph ( 3 ); pyr=3,5-dimethylpyrazolyl) as P₁-building block (R−P) and tBuPH₂ in an equimolar ratio. Compound 5 is of special interest since the presence of two pyridyl-substituents as well as the P₄-core allows for a rich coordination chemistry with coinage metal salts [Cu(MeCN)₄][OTf], Ag[OTf] and in situ formed [Au(tht)][OTf] (tht=tetrahydrothiophene). Both tetraphosphetanes undergo alkylation reaction with MeOTf to give a series of tetraphosphetanium and tetraphosphetanediium triflate salts with additional methylation of the pyridyl-moiety in case of 5 resulting in interesting novel cyclic trications. Harsh reaction condition and an excess of MeOTf converts 5 into the cyclic trication [-P(^MePy)PMe₂P(^MePy)PtBu-]³⁺ ( 13 ³⁺; ^MePy=1-methylpyridiniumyl) through the elimination of isobutene. This salt undergoes a complicated rearrangement reaction involving a P−P/P−P bond metathesis to form trication [-P(MePy)₃PtBu-]³⁺ ( 17 ³⁺) when reacted with Me₂PPMe₂.     

SYNTHESIS AND CRYSTAL STRUCTURE OF Mo_20_2S_2(Py)_4(Mo0_4)

<正> Introduction. A series of trinuclear molybdenum clusters has been synthesized and identified. Most of them have almost the sameMo-Mo distance. We have synthesized another kind of trinuclear molybdenum complex which has different Mo-Mo distances and can be comsidered as composed of the complex (Mo_2O_2S_2(py)_4)~2+ and the molbdenic ion (MoO_4)~2-. This paper reports the synthesis and structure of the title compound.     

[VS_4Cu_6(Py)_8I_3]的合成和晶体结构

在(NH4)3VS4/CuI/Py反应体系中合成了新化合物 [VS4Cu6(Py)8I3]并测定其晶体结构。该化合物(C40H40N8Cu6I3S4V)属正交晶系, 空间群为Fdd2, 晶胞参数为: a = 29.924(6), b = 13.475(3), c = 25.853(5) , V = 10425(4) ?, Dc = 2.006 g/cm3, Mr = 1573.92, Z = 8, (MoK) = 4.546 mm-1, F(000) = 6048。结构由直接法解出, 用全矩阵最小二乘法修正, 最终偏离因子R = 0.023, wR = 0.069。簇合物分子是由6个带端基配体的Cu沿着四面体单元VS4的6条SS边配位而成, 6个Cu排列成了1个八面体, V基本位于八面体的中心, 整个分子具有C2对称性。     

双核银络合物[Ag_2(dppm)_2(Py)_2(μ-Cl)]ClO_4的合成与结构

二-(二苯基膦)甲烷(dppm)是一种易与金属形成多核络合物的有机膦配体。我们用dppm作为配体合成了一系列银的多核络合物,并对其结构进行了研究。本文报导了其中一个双核化合物[Ag_2(dppm)_2(Py)_2(μ-Cl)]ClO_4的合成及晶体结构、分子结构的测定。     

THE SYNTHESIS AND CRYSTAL STRUCTURE OF Mo_3(μ_3-O)-(μ-S)_3(μ-OOCCH_3)(dtp)_3(Py)

<正> The title compound was obtained by the reaction of Mo3(μ3-O) (μ-S)3(dtp)4(H2O) with CH3COONa and pyridine. Mo3C19H38N1O9P3S9,Mr= 1093. 79, triclinic, space group P1, a = 12. 921(3) , b = 14. 260(3) , c= 12. 800(3)(?),α = 97. 54(2), β=116. 66(1), γ=100. 10(2) °, V = 2015, 2(8)(?)3, Z=2, Dc = 1. 80gcm-3, F(000) = 1092, final R = 0. 066 for 3444 observations, room temp. In the structure the three Mo atoms form an isosceles triangle capped by a μ3-O atom with three sides of 2. 589(2) , 2. 642(2), and 2. 627(2) (?) respectively, and the car-boxyl bridged Mo-Mo bond is the shortest one.     

Synthesis and Crystal Structure of a Novel Polymeric Complex [WS4Cu4(Py)4(μ-CN)2]∞

The reaction of [Et4N]2WS4 with 4 equiv of CuCN in pyridine produced a new polymeric complex [WS4Cu4(Py)4(μ-CN)2]∞ 1, whose crystal structure has been characterized by single-crystal X-ray analysis. 1 (C22H2oCu4N6S4W, Mr=934.71) crystallizes in monoclinic, space group P21/n with a ='8.994(2), b=16.038(3), c=12.026(3) A, β= 90.85(1)°, V= 1734.6(6) A3, Z=2, Dc=1.789 g/cm3, F(000)=896,t(MoKa)=59.8 cm-1 and T=193 K. The structure was refined to R=0.064 and Rw=0.080 for 2209 observed reflections (I ＞ 3.0σ(I)). The X-ray analysis shows that the tetrahedral WS4 core is coordinated by four Cu atoms, forming a saddle-like WS4Cu4 unit. These repeating units are further interconnected by four Cu-μ-CN-Cu 2.726(2) and 2.723(2) A, respectively.     

四核银簇合物Ag_4(o-CH_3C_6H_4CS_2)_4(Py)_4与二核铜化合物Cu_2(o-CH_3C_6H_4CSS_2)_2(Py)_2的合成和晶体结构

邻甲基苯荒酸四乙基铵盐分别与硝酸银和氯化铜反应,经毗啶重结晶,得到四核银簇合物Ag_4(o-CH_3C_6H_4CS_2)_4(Py)_4(晶体Ⅰ)和二核铜化合物Cu_2(o-CH_3-C_6H_4CSS_2)_2(Py)_(晶体Ⅱ)。用X射线单晶衍射法测定了它们的晶体结构。晶体Ⅰ的空间群为P2/n。晶胞参数:a=14.757(4),b=12.231(3),c=15.183(4)A,β=91.14(2)°,V=2739.95A~3,Z=2。2590个衍射点参与修正,最终偏差因子R=0.087。晶体Ⅱ的空间群为C_1~1-P1。晶胞参数:a=9.307(7),b=9.546(7),c=10.119(8)A,α=95.06(9),β=109.74(10),γ=118.86(10)°,V=705.94A~3,Z=1。1198个衍射点参与修正,最终偏差因子R=0.086。 Ag_4(o-CH_3C_6H_4CS_2)_4(Py)_4分子中Ag_4呈蝴蝶状构型,其配位情况与四核银簇合物Ag_4(a-C_(10)H_7CS_2)_4(Py)_4相似。Cu_2(o-CH_3C_6H_4CSS_2)_2(Py)_2分子构型与Cu_2(a-C_(10)H_7CSS_2)_2(Py)_2十分相似。Cu—Cu键长为2.608A。而且邻甲基苯荒酸与Cu~(2+)反应包括一个氧化还原反应,也与a-萘荒酸与Cu~(2+)反应相似。可以认为邻甲基苯荒酸与a-萘荒酸有相似的空间效应和电子效应。     

THE SYNTHESIS AND CRYSTAL STRUCTURE OF B-(32) MODEL COMPOUND: 1-C_4H_9Co(salen)(Py)

The title complex i-C_4H_9Co(salen)(Py) (Py=pyridine. salen=dianion of disalicylideneethylenediamine) has been first synthesized. Its crystal structure has been determined by X-ray diffraction method. The crystsis are monoclinic with space group P2_1/ C. The unit cell parametes are presented. The structure has been refined to a final R of 0.038.     

Oxidation of coordinated ethylenediamine in platinum(IV) complexes with bromine. Crystal structures of [Pt(en)Py2Br2]Br2 · H2O, [Pt(HN-C(O)-C(O)-NH)Py2Br2] · H2O, and [Pt(en)PyBr3]NO3

Heating of an aqueous solution of [Pt(en)Py₂Cl₂]Cl₂ · 2H₂O (I) with KBr excess leads to the formation of [Pt(en)Py₂Br₂]Br₂ · H₂O (II). The interaction of a solution of II with bromine water results in the precipitation of polybromide ([Pt(en)Py₂Br₂]Br₂ · Br₂), which within a few days in the reaction solution partly transforms into oximide platinum(IV) complex, [Pt(HN-C(O)-C(O)-NH)Py₂Br₂] · H₂O (III). Complex [Pt(en)PyBr₃]Br · H₂O (IV) with an impurity of II was prepared by reacting KBr excess and the product of [Pt(en)Py₂]Cl₂ oxidation with chlorine in 0.05 N HCl. The action of HNO₃ on the solution of IV produced a nitrate derivative ([Pt(en)PyBr₃]NO₃, V). Complex IV, unlike II, does not react with bromine. The IR spectra of all the obtained compounds were recorded. Complexes II, III, and V were studied by X-ray crystallography. The crystals of II are monoclinic, space group P2₁/c, a = 15.640(2) Å, b = 9.345(1) Å, c = 14.167(2) Å, β = 102.63(1)°, V = 2020.5(5) ų, Z = 4, R _hkl = 0.033. The crystals of III are triclinic, space group P $\bar 1$ , a = 7.108(1) Å, b = 10.946(1) Å, c = 11.020(2) Å, α = 83.63(1)°, β = 80.31(1)°, γ = 75.02(1)°, V = 814.4(2) ų, Z = 2, R _hkl = 0.033. In the near-planar five-membered chelate ring (torsion angle NCCN is 7°), the C-O distances (1.23(1) Å) correspond to double bonds; the C-C (1.53(1) Å) and C-N (1.31(1) Å), distances correspond to ordinary bonds. The crystals of V are monoclinic, space group P2₁/c, a = 8.306(2) Å, b = 8.995(2) Å, c = 20.231(4) Å, β = 97.48(2)°, V = 1498.6(6) ų, Z = 4, R _hkl = 0.037.     

三核钼簇合物配基置换反应: 两个三核钼簇合物[Mo3S4(DTC)4(DMF)](EtOH)和[Mo3S4(DTC)4(Py)](Py)2(H2O)的合成和晶体结构研究

通过配基置换反应合成出两个新的三核钼簇合物[Mo3S4(DTC)4(DMF)](EtOH)(1)和[Mo3S4-(DTC)4(Py)](Py)2(H2O)(2). 用X射线衍射法测定了这两个簇合物的晶体结构.簇合物1的空间群为PT, 晶胞参数: A=10.624(5), b=11.373(2), c=19.216(5)埃;α=87.92(2), β=79.89(3), γ=69.44(3)°; Z=2. 簇合物2的空间群为PT, 晶胞参数:a=11.505(2), b=11.945(1), c=18.974(2)埃; α=99.18(1), β=94.82(1), γ=93.84(1)°; Z=2, 结构分析结果表明, 两个簇合物的簇胳均是{Mo3S4}^4^+的三核钼原子簇, 对簇合物中配基对Mo-Mo键的影响以及配基置换反应的规律性进行了讨论.     

三核钼簇合物配基置换反应: 两个三核钼簇合物[Mo3S4(DTC)4(DMF)](EtOH)和[Mo3S4(DTC)4(Py)](Py)2(H2O)的合成和晶体结构研究

通过配基置换反应合成出两个新的三核钼簇合物[Mo_3S_4(DTC)_4(DMF)](EtOH(1)和[Mo_3S_4-(DTC)_4(Py)](Py)_2(H_2O)(2)。用X射线衍射法测定了这两个簇合物的晶体结构。簇合物1的空间群为PI,晶胞参数:a=10.624(5),b=11.373(2),c=19.216(5)A;α=87.92(2),β=79.89(3),r=69.44(3);Z=2。簇合物2的空间群为PI,晶胞参数:a=11.505(2),b=11.945(1),c=18.974(2)A;α=99.18(1),β=94.82(1),r=93.84(1)°;Z=2。结构分析结果表明,两个簇合物的簇胳均是{Mo_3S_4}~(4+)的三核钼原子簇。对簇合物中配基对Mo-Mo键的影响以及配基置换反应的规律性进行了讨论。     

一种含吡啶配体氮杂环卡宾钯络合物(NHC)PdCl_2(Py)的合成及其高效催化偶联反应

通过两步反应合成了一种卡宾配合物(NHC)Pd Cl2(Py),该配合物在有氧条件下能够高效地催化Suzuki偶联反应、Heck偶联反应和Sonogashira偶联反应.对于Suzuki偶联和Sonogashira偶联,仅使用0.1 mol%催化量的催化剂就能取得较好的收率.而对于不活泼的Heck偶联,使用1 mol%催化量的催化剂也能得到较好的产率.     

氮氧自由基配合物[Cu(NIT4Py)(IDA)]_n的合成与晶体结构(英文)

A novel one-dimensional (1D) Cu(Ⅱ) nitronyl nitroxide complex bridged by iminodiacetate dianion [Cu(NIT4Py)(IDA)]n,where NIT4Py=2-(4'-pyridyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide and IDA= iminodiacetate dianion,was synthesized and structurally characterized by X-ray diffraction. It crystallizes in monoclinic,space group P21/c with a=0.921 09(10) nm,b=0.780 09(9) nm,c=2.486 3(3) nm,β=96.826(2)°. The Cu(Ⅱ) ion is five-coordinated with a distorted square-pyramidal geometry. Each iminodiacetate dianion bridges two Cu(Ⅱ) ions via a monodentate-tridentate mode into a 1D chain,and these 1D chains are further linked into a 2D network via hydrogen-bonding interactions.