CRYSTAL STRUCTURE OF DI(α-HYDROXYISOBUTYRATE)DIAQUO NEODYMIUM NITRATE Nd(C_4H_7O_3)_2NO_32H_2O

The crystal structure of di(-hydroxyisobutyrate)diaquo neodymiumnitrate Nd(C_4H_7O_3)_2NO_32H_2O was determined by X-ray diffraction analysis.It belongs to monoclinic,space group C2/C,with cell dimensionsa=8.996(1),b=8.601(1),c=21.111(3),β=92.38°,V=1632.O,Z=4,D_c=1.83g/cm~3.Crystalstructure has been refined by full-matrix least-square techniques giving afinal R value of 0.036.The neodymium atom is coordinated to eight oxygenatoms.The nitrate group in complex is not bonded to neodymium,each twoneodymium atoms are linked by bridging carboxyl group forming a chainpolymeric molecule.     

SYNTHESIS AND CRYSTAL STRUCTURE OF THE LANTHANIDE COMPLEX WITH MIXED LIGANDS [Pr (CH_3COO)_2(NO_3)(Phen)]_2

<正> [Pr(CH3COO)2(NO3)(Phen)]2, Mr = 1002. 41. The crystal is monoclinic, space group I2/m, with a = 11. 725(5), b = 12. 269(5), c=12. 732(4) A, V = 1792(2)A3,β=101. 88(0)°. Z = 2, Dc=1. 86g/cm3,μ(MoKa) = 27. 5cm-1, F (000) = 984. The structure was solved by Patterson method and Fourier syntheses, and refined by full matrix least-squares method to R = 0. 033 for 1660 observed reflections with I>3σ(I). The molecule of the complex is a dimer and each praseodymium atom is eight-coordinated in a distorted square antiprism geometry.     

SYNTHESIS AND CRTYSTAL STRUCTURE OF LUTETIUM (Ⅲ) COMPLEX WITH 1,3,5-BENZENETRICARBOXYLIC ACID

<正> LuC9H3O6(H2O)5·4H2O, Mr = 528. 3, monoclinic, C2/c, a = 14. 673(3), b=16.930(4), c= 14. 383(4)(?) , β=118.77(2)°, Z = 8, 7 = 3132(1) (?)3, Dc = 2. 24g/cm3, μ(MoKα) = 67.0cm-1, F(000) = 2064, R = 0. 052 for 4080 observed reflections. The Lutetium ion is eight-coordinated by three oxygen atoms, one from a 1, 3, 5,-benzenetricarboxylate ligands, two from another one, and five aqua ligands,forming a polymeric zigzag chain along the [101] direction. The Lu -O distances fall in the range of 2. 229 -2. 404(?).     

SYNTHESIS AND STRUCTURE OF EUROPIUM (Ⅲ) WITH N,N'''' BISSALICYLIDENE ETHYLENEDIAMINE (H_2salen)

<正> A europium (Ⅲ) complex with N, N' - bissalicylidene-ethylenediamine (H2salen) has the formula Eu(Hsalen)(salen)4H2O,where water molecules are in the outer sphere and do not coordinate with Eu (Ⅲ), was synthesized and structurally studied. The central atom Eu is coordinated by four nitrogen atoms and four oxygen atoms in a deltadodecahedron arrangement. The crystal is monoclinic,space group P21/a with cell constants a=16. 441(2),b=20. 599(3),c=10. 719(2) A ,β=84. 16(1)°,Z=4 and V = 3611. 5(8) A3,Dc=1. 392g/cm3.The final standard deviation R is 0. 093.     

SYNTHESIS AND CRYSTAL STRUCTURE OF A PLATINUM (Ⅱ) COMPLEX WITH MIXED DIPHOSPHINE AND THIOLATE LIG-ANDS, Pt(dppm)(SPh)_2

<正> The reaction of H2PtC14, Ph2PCH2PPh2(dppm) , NaSPh, and element selenium in DMF gives rise to a mononuclear complex Pt (dppm ) (SPh)2, PtS2P2C37H32, Mr = 797. 83, triclinic, space group P1, a = 10. 051(2), b = 11. 805 (3), c=15. 499(4)(?). α=109.41(3), β=90. 94(3), γ=107. 80°, V = 1636.3 (?)3. Z = 2, Dc= 1. 619gcm-3, * = 45. 749cm-1, and F(000) = 788. The final structural refinement converged with unweighted and weighted R factors of 0. 029 and 0. 044, respectively, for 4832 observed unique reflections with I>3σ(I). The complex is an asymmetric molecule with a four-coordinated Pt atom. The average of Pt -S and Pt-P bond distances are 2. 334(3) and 2. 260(3) (?), respectively.     

SYNTHESIS AND CRYSTAL STRUCTURE OF MgCl_2(CH_3COOC_2H_5)_2

The crystal of the title compound was prepared and its structure determined by X-ray diffraction method.1672 independent reflections were collected. The crystal is orthogonal with space group P2_12_12, and a=7.353(3),b=25.111(10), c=8.631(2), Z=8. The structure was solved by using Patterson method and modified with LSM program.The final R= 0.0795. The structural features of the title compound are:Mg(Ⅱ) is octahedral and ethyl acetate is located on trans-position.Mg atoms are connected by double chloro-bridge and form polychains.     

SYNTHESIS,CRYSTAL STRUCTURE AND MAGNETISM OF THE COMPLEX:GdFe(CN)_64H_2O

ＳＹＮＴＨＥＳＩＳ，ＣＲＹＳＴＡＬ　ＳＴＲＵＣＴＵＲＥ　ＡＮＤ　ＭＡＧＮＥＴＩＳＭ　ＯＦ　ＴＨＥ　ＣＯＭＰＬＥＸ：ＧｄＦｅ（ＣＮ）_６４Ｈ_２ＯＳＹＮＴＨＥＳＩＳ，ＣＲＹＳＴＡＬＳＴＲＵＣＴＵＲＥＡＮＤＭＡＧＮＥＴＩＳＭＯＦＴＨＥＣＯＭＰＬＥＸ：ＧｄＦ...     

SYNTHESIS AND CHARACTERIZATION OF POLY(STYRENE-co-4-VINYLPYRIDINE) NEODYMIUM COMPLEX

Poly(styrene-co-4-vinylpyridine)-neodymium complexes(NdCl_3·PS4VPY)with variouscontents of the functional group and neodymium have been prepared and characterized.Theinfrared and X-ray photoelectron spectra indicate that uncoordinated 4-vinylpyridine(4VPY)unitsremain in the NdCl_3·PS4VPY complexes.The catalytic behaviour of NdCl_3·PS4VPY was described briefly.     

SYNTHESIS AND CRYSTAL STRUCTURE OF Pr(NO_3)_3(Me_2-16-C-5)

<正> The complex Pr (NO3)3 (Me2-16-C-5) (Me2-16-C-5 = 3, 3-dimethyl-1,5,8,11,14-pentaoxacyclohexadecane) crystallizes in the hexagonal space group P65with a = b = 13. 145(2), c=25. 611(5) A ; Z = 6; V = 3832(1)A3; Dc = 1. 53gcm-3; F (000) = 1776;μ= 19. 7cm-1 (MoKa). The final refinement converged with R = 0. 049 and Rw = 0. 051 for 2005 observed reflections. The Pr(Ⅲ) ion is 11-coordinated to three bidentate nitrate groups and five oxygen atoms of a crown ether. The average Pr -O(crown) and Pr -O(NO3-) bond lengths are 2. 68 and 2. 57A , respectively.     

SYNTHESIS AND STRUCTURE OF THE DINUCLEAR MANGANESE-SULFUR COMPLEX (Ph_4As)_2Mn_2(SC_3H_6S)_4

<正> (Ph4As)2[Mn2(SC3H8S)4] was obtained from the reaction of MnCl2-4H2O,Na2(1,2-pdt)(1,2-H2pdt=CH3CH(SH)CH2SH),and Ph4AsCl.C80H64As2Mn2S8, Mr =1301.41,orthorhombic,Pbca; a=10.854(2), b =22.562(6), c =24.545(6)A; V=6010.8A3;Z =4,Dc=1.44g/cm3. The centrosymmetic anion of title compound is a dimer of (Mn(pdt)2]- bridged by one sulfur atom each of the two bridging pdt2-, The atom Mo(Ⅲ) is in a distorted trigonal bipyramidal geometry.     

THE SYNTHESIS AND CRYSTAL STRUCTURE OF NdBr_3(i-C_3H_7OH)_2(THF)_2

ＴＨＥ　ＳＹＮＴＨＥＳＩＳ　ＡＮＤ　ＣＲＹＳＴＡＬ　ＳＴＲＵＣＴＵＲＥ　ＯＦ　ＮｄＢｒ＿３（ｉ－Ｃ＿３Ｈ＿７ＯＨ）＿２（ＴＨＦ）＿２￥ＨｏｎｇＹｅＳＵＮ；ＣｈｕｎＨｕｉＨＵＡＮＧａｎｄＧｕａｎｇＸｉａｎＸＵ（ＲｅｓｅａｒｃｈＣｅｎｔｅｒｏｆＲａｒｅＥ...     

SYNTHESIS AND STRUCTURE OF Ni_2(PBu_3~n)_2(SC_7H_6S)_2

<正> The nickel(Ⅱ) complex Ni2(PBu3n)2(tdt)2(tdt = SC7H6S2-) containing dithiolato and phosphino ligands has been prepared and characterized by X-ray diffraction. The complex crystallizes in triclinic system, space group P1, with a = 14. 423(4), b = 15. 053(3), c=10. 648(3)(?), α=93.,95(2), β=100. 31(3), γ = 84. 16(2)°; V =2259.6 (?)3; Z = 2, Dc= 1. 22 gem-3, Mr = 830. 57; μ = 11. 076cm-1, F (000) = 888. In the complex, the Nickel atoms are linked by two bridging sulfur atoms from the two tdt ligands with the Ni-Ni distance of 2. 679 (?) . and each nickel atom is four coordinated by one phosphorus and three sulfur atoms with a square-planar geometry, the average length of Ni -S bond is 2. 193(?) and that of Ni-P bond 2.186(?).     

CRYSTAL AND MOLECULAR STRUCTURE OF A DIPHENYL SULFOXIDE COMPLEX WITH CERIUM NITRATE, Ce(N0_3)_3[(C_6H_5)_2SO]_4

<正> The title complex crystallises in the triclinic, space group PT with two formula units in a unit cell of dimensions a=11.182(4), b=14.357(5), c=17.362(6) A and α= 84.08(3)°, β=72.79(3)°, r= 69.27(2)°, Dx=1.51 g.cm-3, V=2489.6(15) A3. The final index for 6319 observed reflections is 0.0274. The Ce3+ ion is coordinated by ten oxygen atoms with Ce-O distances varying from 2.469 to 2.706 A. The three nitrate groups are all bidentate ligands.     

CRYSTAL STRUCTURE OF COMPLEX OF ERBIUM(Ⅲ) AND QLYCINE,[Er(GLy)_2(H_2O)_4]_2(ClO_4)_6·4(C_4H_8O_2)

<正> The crystal structure of [Er(Gly)2 (HaO)4]2(ClO4)6.4(Dio) (Gly= NH2CH2COOH; Dio=dioxane) has been determined belonging to triclinic system with space group P1.The final R was 0.055. The carboxyl groups of Gly are associated to Er(Ⅲ) atoms to act as the bidentate bridging ligands.     

SYNTHESIS AND STRUCTURE OF A COBALT DIMER COMPLEX (Bt_4N)_2 [Co(SOC_6H_4 )(HOSC_6H_4)]_2

<正> The title compound was obtained by reaction of CoCl2.6H2O and mp2- (σ-C6H4SO2-) in MeCN,crystallized as Et4N+ salt in monoclinic system with space group P21/c, Mr=877.040. The cell parameters are:a =16.606(2), b=15.575(1),c=17.725(2)A,β=111.07(1)°,V=4277.8A3,Z=4,Dx= 1.36g/cm3.It is a dimer of [Co(mp)(Hmp)]- connected by two strong hydrogen bonds with a twist angle of about 36.94 .     

SYNTHESIS AND CRYSTAL STRUCTURE OF Ta_3(Te_2)_6

<正> Ta3(Te2)6, Mr = 2074. 04, tetragonal, P4/ncc, a = 9. 204(1) A , c=20,401(8) A, V=1728. 3 A 3, Z = 4, Dc = 7. 97g/cm3, λ(MoKa) = 0. 71073 A . μ= 386, 3cm-1,F(000) = 3372, T= 296K , R= 0. 027, Rw = 0, 029 for 493 observed unique reflections. The structure is composed of infinite [TaTe4] chains along the e axis. In these chains, the Ta sequences distort in such a way that linear Ta, clusters are formed.     

SYNTHESIS AND STRUCTURE OF COMPLEX(PPh3)_2Ni[S_2C=C(CN)_2]

(PPh_3)_2Ni(i-mnt),(i-mnt=S_2C=C(CN)_2),Mr=613.43,monoclinic,Pn,a=9.167(3),b=10.872(3),c=18.209(7) ,β=101.46(3)°,V=1779(1) ,Z=2,Dc=1.15 g/cm~3,λ(Moka)=0.71069 ,μ=7.67 cm~(-1),F(000)=648,T=296K,final R=0.060,Rw=0.073 for 1909 observed reflections with Ⅰ≥3σ(Ⅰ).The complexadopts a square planar geometry as its coordination unit,the mean Ni-S and Ni-P distances are 2.216and 2.221 ,respectivety.     

SYNTHESIS AND CRYSTAL STRUCTURE OF COMPLEX [CrMo_3 (μ_3-O)_3(μ-O)(μ-O_2CCH_3)_5(O_2CCH_3)_3]Na2 · H_2O

<正> The title complex C CrMo3 (μ3-O )3 (μ-O) (μ-O2CCH3 )5 (O2CCH3)3]2Na2 · H2O (Mr=1814. 32) crystallizes in monoclinic, space group P21/ n with a=11.209(5), b=18. 05(1), c=14. 44(1) A , β= 98. 30(5)°. V=2890 (3) A3, Z=2, A = 2. 08 g/cm3, F(000) -1780, Final R = 0. 049, Rw = 0. 058 for 2622 independent reflectons with I>3σ(I). The complex anion contains two Mo3O4 cores which connect two chromium atoms through four μ3-O atoms and eight bridging CH3COO- groups. Each of the Cr atoms and the Mo atoms is coordinated by six oxygen atoms. The anions are linked by Na cations to form one-dimensional infinite chain structure.