STRUCTURE OF PENTAAQUO PYROMEL DIZINE (Ⅱ)-DIHYDROUS [C_6H_2(COO)_4Zn_2(H_2O)_5]·2H_2O

Crystal and molecular structure of [C6H2(COO)4Zn2(H2O)5]·2H2O has been determined by X-ray diffraction technique, Mr = 507. 0,monoclinic,space group P21/n,a = 5. 925(1), 6 = 23. 613(9) ,c= 11. 790(5) A ,β= 96. 36 (3)°, V=1639. 3 (1. 0) A3,Z=4,DC = 2. 05g/cm3,λ=0. 71069 A,μ(MoKa) = 30. 9/cm-1,F(000) = 1024e. The structure was solved by Patterson and Fourier techniques and refined by least-squares method to a final conventional R value of 0. 055(Re = 0. 059)for 1557(I>3σ(I))reflections. Both atoms Zn(1) and Zn(2) are bridged by the Z,E-type of the car-boxyl group, in addition, Zn (1) is monodentate-bonded to the three remaining carboxyl and Zn(2) is bonded to five water molecules. The crystal structure shows a 2-dimensional polymeric network along(010)face. The Zn(l) -O distances are in the range of 1. 94~ 2. 01 A (average 1. 98 A ). The Zn(2) -O distances are in the range of 2. 06~2. 21 A (average 2. 12A).     

CRYSTAL AND MOLECULAR STRUCTURE OF MOLYBDENUM COM-PLEX MoO_2Cl_2(C_4H_3OCOOH)_2

<正> The crystal and molecular structure of the title compound was determined by single crystal X-ray diffraction method. The complex crystallizes in the mono-clinic space group P21/n with a = 10. 306 ( 3) , b = 10. 161 (2), c = 14. 798 ( 4) A . β= 108. 52(2)°, V= 1469. 4(6)A3,Z= 4. The structure was solved by direct methods. Least-squares refinement converged to a final value of R = 0. 043 and Rw= 0. 040 for 1237 reflections. The molybdenum (Ⅵ) ion is bonded to two chlorine atoms, two oxo atoms and two oxygen atoms from two monodentately and weakly coordinated carboxyl groups of molecules C4H3OCOOH, forming a octahedron. The Mo-O distances are in the range 1. 66 - 2. 39A ,the Mo-Cl distances fall in the range 2. 33-2. 34A.     

CRYSTAL STRUCTURE OF 18-TUNGSTODIVANADATE ANION IN Na_2H_2[H_2V_2W_(18)O_(62)].12H_2O

The structure of Na_2H_2[H_2V_2W_(18)O_(62)]12H_2O has been determined by x-rayanalysis.The crystals are trigonal,space group R3m,with cell parametersa=37.613(11),c=12.972(7)A,V=15901(13)A~3,and Z=9.The structure model wasrefined by full-matrix least square to R=0.065 for 1702 reflections with F>4σ(F).The existence of the[H_2V_2W_(18)O_(62)]~(4-)heteropolyanion in the crystals has beenconfirmed.It is composed of two VO_4 tetrahedra and eighteen WO_6 octahedralinked to gve the Dawson-type structure.     

CRYSTAL STRUCTURE OF CYCLOOCTADIENYL POTASSIUM TE- TRAHYDROFURANATE ,C_8H_(11)K(OC_4H_8)_2

<正> The title compound, cyclooctadienyl potassium tetrahydrofuranate was prepared by the reaction of cycloocta-1,5-diene with metallic potassium in tetrahydrof u-ran(THF) in the presence of triethylamine. Its crystal structure was determined by a low temperature X-ray diffraction analysis method. The crystal is monoclinic with space group Pc,a=6. 192(3),b=9. 444(8),c=14. 543(1) A ,β=94. 92(5)°,V = 847. 24 A3,Z = 2,DC= 1. 14 g/cm3 and μ(MoKa) = 5. 58cm-1. The structure was solved by heavy-atom methods and refined by least-squares to a final R value of 0. 049. The potassium cations, each with two complex THF molecules attached,are linked by bridging cyclooctadienyl an-ions,while the anions are connected to the bridging cations to form a puckered chain.     

CRYSTAL AND MOLECULAR STRUCTURE OF GUANIDINIUM BIS (o-AMINOPHENYLARSENIC) HEXAMOLYBDATE (CN_3H_6)_4[(o NH_2C_6H_4 As)_2Mo_6O_(24)]

<正> Guanidinium bis (o - aminophenylarsenic) hexamolybdate belongs to monoclinic space group P21/c,with a=10. 217(2),b= 18. 870(2),c= 10. 939(2)A,β = 102. 82(3)°,Z = 2,V=2056. 4A3,and Dc=2. 477 g·cm-3. Each molecule contains one [(o-NH2C6H4As)2Mo6O24]4- anion and four CN3H6+ cations. In the anion,six distorted MoO6 octahedra are connected with edges-sharing to form a six-membered Mo ring which is capped above and below by two o - aminophenylarsenic groups. There is half a molecule in an asymmetric unit. It is interesting that both phenyl planes are almost perpendicular to the plane of the Mo atoms. The structure of the anion is similar to that of [ (CH3 As)2Mo6O24]4-,[(n-C3H7As)2Mo6O24]4- or [(C6H5CH2As)2Mo6O24]4-. This is the first example of this type of compounds in which the As atom is directly connected to a substituted phenyl group.     

Crystal and Molecular Structure of Guanidinium Pentamolybdobis (n-amylphosphonate)(CN3H6)4[(n-C5H11P)2Mo5O21]

The crystal structure of guanidinlum pentamolybdobis(n-ainylphcsphonate), which contains the longest carbon chain hitherto known, was determined by single-crystal X-ray diffraction analysis. It belongs to monoclinic, space group C2/c, Z = 4, 0=18.857(2), b=12.170(1), c=18. 294(2) A .β=102.73 (2), V=4095. 2A3.u= 140. 34 cm-1. The intensity data were collected on an Enraf-Nonius CAD4 diffractometer with MoKa radiation. The positions of all molybdenum and phosphorus atoms were determined by the direct method. The other non-hydrogen atoms were revealed by difference Fourier synthesis. The structure was refined by full-matrix least-squares procedure to a final R value of 0. 068. The structure of the anion is similar to [(CH2P)2Mo5O21]4-, [(NH3C2H4P)2Mo6O21]2-, [(n-C3H7As)2Mo5O21]--, and [(C3H5As)2Mo6O21]4-. It consists of a ring of five distorted MoO, octahedra joined by edge-sharing, except for one pair which is joined by corner- sharing. The size of the Mo6O16 ring is close to those of [(CH3P)2Mo5O21]4- a     

Hydrothermal Synthesis,Crystal Structure and Thermal Stability of a Novel Water Cluster [Mn(phen)_2·H_2O·Cl]·p-FBA·3H_2O

A novel water cluster [Mn(phen)2·H2O·Cl]·p-FBA·3H2O (p-FBA = p-fluorobenzoic acid and phen = 1,10-phenanthroline) was synthesized by the hydrothermal reaction of MnCl2 with p-FBA and phen at 150 ℃ and characterized by elemental analysis,IR spectra and TG. Its crystal structure was determined by X-ray single-crystal diffraction study. The crystal belongs to the triclinic system,space group P1,with a = 10.5768(1),b = 11.5960(1),c = 12.9916(2) ,α = 101.816(2),β = 95.397(2),γ = 103.052(2)o,V = 1502.8(3) 3,Z = 2,Dc = 1.463 g/cm3,R = 0.0399 and wR = 0.0997. The crystal structure shows that the manganese(Ⅱ ) ion is six-coordinated by four nitrogen atoms,one chloride ion and one oxygen atom forming a distorted octahedral coordination geometry. The structure includes three acyclically connected water molecules and one coordinated water molecule thus forming a (H2O)4 water cluster. This water pattern forms a cross-linked discrete ring. The steady (H2O)4 is further extended into a cage-like structure by the hydrogen-bonding interaction formed by dissociative aqua molecule and Cl-ligand. The dimer structure is further extended into a one-dimensional (1D) structure through C-H···O interaction. π···π Stacking interaction among adjacent phen aromatic rings further stabilizes the crystal structure.     

SYNTHESIS AND STRUCTURE OF A NEW TYPE OF COORDINA-TION COMPOUND OF Gd(Ⅲ) WITH H_2 CCH_2CH_2C(~+NH_2)C-HCOO-

<正> The crystal structure of gadolinium L-proline (Pro) complex [Gd2-(C5H9NO2)6 (H2O)6] (ClO4)6 has been determined. The complex crystallizes in the triclinic space group PI with following crystal data: a = 9. 906(3), b=13. 052(5), c = 13.703(5) A. α=109. 63(3), β=110.31(2), γ=100. 73(3)°, V=1470.3(9) A3.Mr=1710. 1, F(000) = 854,μ=26. 30 cm-1, Dc = 1. 931 g/cm3, Z=1.The structure was refined to the final R of 0. 048 for 3804 reflections. The structure is of one-dimensional chain, in which each gadolinium ion lies at the center of a distorted square antiprism of the eight oxygen atoms provided by four bridging carboxylate groups from four Pro ligands, a terminal carboxylate group from one terminal Pro ligand and three water molecules and the two neighbouring gadolinium ions are linked to each other through the two bridging carboxylate groups from the two Pro ligands. The prolines exist in the form of H2 CCH2CH2(+NH2)CHCOO-, and the complexions in the crystal are linked together by the net of hydrogen bo     

CRYSTAL STRUCTURE OF TRIGALLIUM TRIS(OBTHOPHOSPHATE) 2-ETHANOLANINE HYDRATE, Ga_3(PO_4)_3·H_2NCH_2CH_2OH·H_2O

<正> Trigallium tris(orthophosphate) hydrate-2-ethanolamine was synthesized from the ethanolamine(EAN)-Ga2O3-P2O5-H2O system. The compound crystallizes in monoclinic system, space group P21/n, with a = 8.669(2), b = 17.932(4), c = 9.097(2) A,β= 108.32(1)°,V=1342.4 A3, Z = 4. The structure was solved by direct methods and refined to final R of 0.048. For the three gallium atoms in an asymmetric unit, the coordination tetrahedron of Ga(3) is nearly regular, while Ga(l) and Ga(2) are each coordinated by five oxygen atoms and their coordination polyhedra show some distortion from a trigonal bipyramid. The three-dimensional net in the crystal lattice is built of two-dimensional nets which are composed of irregular triangles, quadrilaterals, pentagons and octagons formed by Ga and P atoms. Moreover, the corrugated 2D nets running along [101] are linked together by two double-crank-shaft chains of GaPO4, one of which runs along [101] while the other along [101]. The ethanolamine molecule, so called the template,     

CRYSTAL STRUCTURE OF GdCl_3(DIMETHOXYETHANK)_2

<正> C8H2oCl3GdO4,Mr=443.80,monoclinic, space group P21/c, a=11.442 (3),b= 8.849(2), c= 15.575(5)A,β=104.8l(2)° ,V=1521.9(7)A3,Z= 4, DC = 1.94 g/cm3,λ(MoKα) =0.71069A,F(000)=860. The structure was solved by Patterson and Fourier techniques and refined by least-squares nethod to a final conventional lvalue of 0.051 (Rw=0.054). The central ion Gd(III) is bonded to three chlorine atoms and four oxygen atoms froa two dimethoxye-thane molecules to form a distorted pentagonal bipyramid. The Qd-Cl distances are in the range of 2.460-2.628A (average 2.571A). The Gd-O distances are in the range of 2.408-2.493A (average 2.458A).     

THE FORMATION AND CRYSTAL STRUCTURE OF 3β, 5α, 6β, 25-TETROL-24ζ/-METHYLCHOLESTAN TRIHYDRATE: C_(28)O_4H_(50)·3H_2O

<正> Compound C28O4H50·3H2O(Mr = 504. 74) is the orthorhombic space group P212121,wilh a=8. 244(3),b=9. 957(2),c=36. 442(3) A ,V=2991. 4 A3,Z = 4,Dc=1. 123g/cm3,and F(000) = 1120. The structure was solved by direct methods and refined by full-matrix least-squares to R=0. 064 for 2029 independent reflections with I≥1σ(I). The results showed that the basic structure of C28C4H50 is a 4-carboatomic ring -3 - terpene. There are three water molecules in an asymmetric unit.     

CRYSTAL STRUCTURE OF RhCl(dppm)_2·H_2O

<正> C50H46OP4ClRh, RhCl(dppm)2 · H2O, Mr = 922. 2, monoclinic, P21/2, a=10. 532(3), b=22.574(8), c=18. 641(8) A, β=93. 41(3)°, V = 4424 (3) A3, Z = 4, Dc=1. 386 g. cm-3, λ(MoKα) = 0. 71073A , F(000) = 1904. The structure was determined by direct methods and difference Fourier syntheses and refined by full-matrix least-squares to final R = 0. 037 and Rw = 0. 036 for 3432 (F> 6. 0σ(F) ) observed reflections. The structure of the title compound contains RhCl-(dppm)2 and non-coordinated H2O molecules. The rhodium atom is coordinated by one chlorine atom and four phosphorus atoms of two DPPM ligands forming a tetragonal pyramidal configuration.     

RESEARCH ON TRINUCLEAR MOLYBDENUM CLUSTER COMPOUNDS——CRYSTAL AND MOLECULAR STRUCTURE OF Mo_3(μ_3—O)(μ_2—S_2)_3[S_2P(OEt)_2]_3I

The title crystals are golden yellow rhomboic plates, belonging to the monoelinic system. The space group is P_(B_1)/n with unit cell parameters a=16.570(2), b=12.370(1), c=20.007(2), β=99.97(1)°, Z=4, D_c=1.938 g.cm~(-3). The crystal structure was solved mainly by the heavy atom method and refined by the full-matrix least-squares to a final R factor of 0.047 based on 4387 unique reflections with intensities I≥2σ(I). The results show that the crystal structure consists of neutral mono-oxo-capped trinuclear molybdenum cluster molecules with an average Mo-Mo bond length of 2.626(4) and an average Mo-O bond length of 2.036(2) respectively. Each pair of Mo atoms is further bridged by an S_2~(2-) radical, in which one S atom is essentially situated on the triangular plane formed by these three Mo atoms and the other one is situated on the side of the plane opposite to the μ_3-O atom. Besides, each Mo atom is coordinated to two S atoms belonging to an [S_2P(OEt)_2]~-radical so as to complete a nearly pen     

CRYSTAL STRUCTURE OF ORGANOLANTHANIDE COMPLEX [Li~+(DME)_3]_2[(CpNd)_4(μ_2-CH_3)_2(μ_4-O)(μ_2-Cl)_6]~(2-)

<正> The crystal and molecular structure of [Li+(DME)3]2[(CpNd)4 (μ2-CH3)2(μ4-O) (μ2-Cl)6]2~was determined from single crystal X-ray diffraction. The complex crystallizes in the monoclinic space group P21/n with lattice parameters a= 14. 614(5), b= 18. 683 (5),c= 24. 595 (6) A, β = ,91-85(2)°, V = 6712(3) A3,2 = 4,DC = 1. 63g/cm3,F(000) = 3256,Mr=1650. 85. The structure was solved by direct methods and Fourier techniques and refined by least-squares to a final R=0. 047,RW = 0. 049 for 3761 with I>3σ(I). The result revealed that the anion [(CpNd)4(μ4-O) (μ2-Cl)6(μ2-CH3)2]2- is composed of four neodymium (Ⅲ) atoms bridged by six Cl atoms, two methyl groups and one oxygen atom, and every Nd is bonded to a cyclopentadienyl group. The four Nd atoms form a distorted tetrahedron. The cations are composed of two Li+(DME)3 with average Li-O distance of 2. 120(40) A.     

Synthesis, Structure and Properties of (n-Bu_4N)_3[Mo_6O_18NNAr(NO_2)_2]

The title compound was synthesized and characterized by means of elemental analysis, IR, DTA-TG and UV. Its single crystal structure was solved by using direct methods. The compound crystallizes in the orthorhombic space group Pmc(?) with lattice parameters: a = 1. 7261(2), b=l. 7537(3), c=2. 4258(3) nm. V=7. 34220 nm3, F(000) = 3648, Z = 4. The structure was refined to conventional discrepancy factors of R=0. 060 for 3176 observed reflections [Ⅰ>3σ/(Ⅰ)]. The anion represents a modification of the well-known [Mo6O19]2- anion, in which a single terminal oxo group is replaced by a 2,4-dinitrophenyl hydrazine ligand while the structure integrity of the hexanuclear framework is maintained.     

THE SYNTHESIS AND CRYSTAL STRUCTURE OF A NOVEL TETRANUCLEAR COPPER (Ⅰ) CLUSTER COMPLEX, Cu_4(α-C_(10)H_7CSS_2)_4·1/2CS_2

The title compound has been synthesized by the reaction of sodium α-dithionaphthoatewith CuCl_2 in an alkaline aqueous solution or by the reaction of α-dithionaphthoic acid withCuCl_2 in an organic solvent, The crude product was recrystallized in a mixture of CS_2 andC_2H_5OH. The crystals obtained are red and stable in air. The structure of the title compound is determined by a single-crystal X-ray diffractionanalysis. The crystal belongs to monoclinic space group C_(2h)~5- P(2_1/a) with unit cell parameters:a= 16.453(3)A, b=12.651(4)A, c=23.182(7)A, β=100.5(2)°, V=4744.6A~3,Z=4. Thestructure was refined to R=0.06 for 4707 reflections. In the molecule, Cu_4 cluster has a distorted tetrahedral configuration. Surrounding thistetrahydron are four α-perthionaphthoate ligands, coordinated to copper through the sulfuratoms. One of the sulfur atoms in each ligand forms sulfur bridge with copper atoms,while the other is coordinated to only one copper. The three Cu--S bonds formed by thethree sulfur atoms with a given copper atom are approximately coplanar. Each group--C--S_2 with Cu atom on a vertex of the tetetrahedron forms a five-member ring. Thesefive-member rings are also approximately cooplanar. The molecule possesses an approachingS_4 point symmetry. The mechanism for the formation of the title compound involves a redox reaction.which is discussed in this paper.     

Hydrothermal Synthesis and Crystal Structure of a Cd~(2+) Supramolecular Coordination Complex{[Cd_2(HCAM)_2(H_2O)_4]·3.5H_2O}_n with a 3D Metal-organic Open Framework

<正>A three-dimensional coordination polymer {[Cd_2(HCAM)_2(H_2O)_4]·3.5H_2O}_n was synthesized by the hydrothermal reaction of H_3CAM(H_3CAM=4-hydroxypyridine-2,6-dicerboxylic acid)and Cd(NO_3)_2·4H_2O.The structure was characterized by elemental analysis,thermal gravimetric analysis,infrared spectroscopy and single-crystal X-ray diffraction.It crystallizes in triclinic,space group P_1~-with a= 9.4389(19),b=11.009(2),c=11.192(2)(?),α=87.87(3),β= 74.63(3),γ=81.22(3)°,V=1108.2(4)(?)~3,Z=2,D_c=2.164g/cm~3,μ=2.011 mm~(-1),F(000)=710,R =0.0419 and wR=0.1170.X-ray analysis reveals that the title compound adopts a one-dimensional staircase structure by carboxyl of H_3CAM and water molecules,and it is further linked by hydrogen bonds to form a 3-D metal-organic open framework.The thermal gravimetric analysis displays that the framework exists stably below 300℃.     

STRUCTURE OF { CEu_2 (OOCCH_2NHCOCH_2NH_3)_4 (H_2O)_4]·(C1O_4)_6·4H_2O}_n

<正> {[Eu(OOCCH2NHCOCH2NH3)2(H2O)2]·(ClO4)3·2H2O}2,Mr = 1572,P21/n,a=12. 014(4),b=8. 910(5),c=22. 749(5)A ,β=91. 73(3)°,V = 2034 A3,Z=2,Dx=2. 15g·cm-3,λ(MoKa) = 0. 71073A,R=0. 060 for 3107 unique observed reflections (I≥3σ(I)). The complex cation is of one-dimensional chain structure in which the basic unit is a dinuclear complex and the gly-gly ligands are coordinated to metal atoms in two kinds of forms. The overall structure of the dinuclear unit is dioxo and dicarboxyl-bridged.     

Synethesis and Crystal Structure of Bi(ethylenediamine)copper Tetracyanonickelate(Ⅱ)

The crystal structure of the title compound C8H16CuN8Ni has been determined by single crystal X-ray diffraction. The crystal is triclinic with space group P1, a=6.494(3), b=7.270(4), c=7.936(5) .A, α=106.67(3), β=91.33(4), γ=106. 80(6)°, V=341. 3(3) A3, Z==1, Mr=346. 54, F(000)=177, μ=2. 933mm-1, Dc= 1. 686 Mg/m3. The final R factor is 0. 0603 for 1214 unique ob24- served reflections [I≥2σ(I)]. The structure consists of [Cu(en)2]2+ (eh=ethylenedi amine) cations and [Ni(CN)4]2- anions linked together by two of the CN groups (the remaining two act as unidentate ligands) to form infinite chains, in the chain, the hy between the interchains also exist, with distances of 3. 160 and 3. 124 A , so it forms a three-dimensional structure of the title compound.     

CRYSTAL STRUCTURE OF DI - NITRATOBIS(ETHYLCAPROLACTAM)URANYL(Ⅱ) UO_2[CH_2(CH_2)_4CONC_2H_5]_2(NO_3)_2

The crystal structure of Di-nitratobis(ethylcaprolactam)uranyl(Ⅱ) UO_2[CH_2(CH_2)_4CONC_2H_5]_2(NO_3)_2 was established by a single-crystal X-ray diffraction study.It is triclinie, space group P1, with a=7.171(2), b=8.655(3), c=10.182(5)A, α=78.27(3), β=70.63(3), γ=81.76(3)°, V=581.7(4)A~3, Z=l, Dc=1.94 g.cm~(-3).Final R value is 0.0218.The result reveals that uranyl ion is coordinated to six oxygen atoms, two of them are from two carbonyl groups of ethylcaprolactam and the other four are from two nitrate groups.