CRYSTAL AND MOLECULAR STRUCTURE OF (μ-PhS) (μ-σ,π-CH_3CH = CH)Fe_2(CO)_6

<正> The crystal and molecular structure of (μ-PhS) (μ-σ, n-CH3CH = CH)-Fe2(CO)6 has been determined by X - ray diffraction technique. The complex has chemical formula of C15H10O6SFe2 and Mr=129. 99. The crystals are monoclinic,space group P21/c,with α=11. 789(2),b= 7. 159(1),c = 20. 890(4) A ;β = 100. 89(2);V = 1731. 32 A3;Z=4,Dc=1. 65g·cm-3;F(000) = 863. 86. The final R and Rw equal 0. 0315 and 0. 0405 respectively for 2527 observed unique reflections.     

CRYSTAL AND MOLECULAR STRUCTURE OF (μ-SPh) (μ-SCH2CH2CN)Fe_2 (CO)_6

<正> The crystal and molecular structure of (μ-SPh)(μ-SCH2CH2CN)Fe2-(CO)5 has been determined by X-ray diffraction method. The crystals of this complex are triclinic, space group P1,with a=ll.175(1), b=ll.877(2), c= 15.640(2)1,α=106.20(1),β=103.15(1),γ=98.46(1)°; Z=4; Dc=1.67g/cm3. The final structure refinement converged with unweighted and weighted R factors of 0.028 and 0.034 for 2853 observed unique reflections.     

CRYSTAL STRUCTURE OF MOLYBDENUM-CARBENE COMPLEX (CO)_5Mo=C(OC_2H_5)C_6H_4-p-CH_3

<正> INTRODUCTION. Recently, researches on carbene metal complexes are very active, as they are of great importance in both theoretical study and catalytic activity. In a systematic research, the crystal structure of the title complex was analyzed and reported here to the advantage of understanding the catalytic action and searching for new and better carbene catalysts of novel kinds.     

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 AND MOLECULAR STRUCTURE OF TETRANUCLEAR MOLYBDENUM CLUSTER Mo_4(μ_3-O)_2Cl_2(o-CH_3C_6H_4COO)_6

<正> Cluster compound [Mo4(μ3-O)2O4Cl2(o-CH3C6H4COO)6] has been prepared by the reaction of molybdenum pentachloride and o-methylbenzoic acid. It crystllizes in the orthorhombic space group Praia with cell parameters:Mr= 1361. 6,a=13. 792(4), b=17. 957(3),c= 20. 974(9) A ,V=5194(2) A3,Z= 4,Dc= 1. 74g/cm3,F(000) = 2704,μ(MoKa) = 11. 0/cm. The final R=0. 061 and Rw=0. 064 for 1441(I>3oooooooooo(I)) observed unique reflections. The tetranuclear complex molecule, where the molybdenum atoms are bridged by two μ3-O atoms and six bidentate o-methylbenzoato ligands,is located at crystallographic two-fold axis(x,-1/4,1/4) with one Mo-Mo bond of 2. 610A     

CRYSTAL AND MOLECULAR STRUCTURE OF(μ-PhCH_2S)(μ-CH_3C(0)CH_2S)Fe_2(CO)_6

<正> The crystal and molecular structures of (μ-PhCH2S)(μ-CH3C(O)CH2S)-Fe2(CO)6 have been determined by X-ray diffraction technique. The complex has chemical formula of C16H12O7S2Fe2 and Mr=492.08. The crystals are tri-clinic, space group P1,with a=8.461(5), b=10.937(5), c=ll.419(4)A,α=81.61 (3), β=78.21(4),γ=71.04(4)°,V=974.5A3, Dc=1.68 gcm-3,μ(MoKα)=17.3cm-1, Z=2,F(000)=495.93. The final R was 0.038 for 2874 independent reflections.     

MOLECULAR AND CRYSTAL STRUCTURE OF (μ-HOCH_2 CH_2 S)_2 Fe_2 (CO)_4(PPh_3)_2

<正> The molecular and crystal structure of the complex (μ-HOCH2CH2-S)2 Fe2(CO)4(PPh3)2 synthesized by reaction of ethylene epoxide with (μ-Lis)2Fe2(CO)6, followed by EtOH alcoholysis and PPh3 substitution,was determined by X-ray diffraction technique. The crystals are triclinic,space group P 1,with a= 10. 902(2),b=12. 106 (2),c=16. 123(4) A ,V= 2079. 36A3,α=78. 13(1),β=89. 37(2),γ=87. 93(1)°, Z = 2,Dx=1. 44 g/cm3.μ(MoKa) = 9. 149cm-1, F(000) = 940. The final R and Rw equal to 0. 055 and 0. 068,respectively,for 3598 observed independent reflections. In this molecule two PPh3 ligands are trans to the Fe - Fe bond and axially coordinated to two iron atoms. In addition,two hydroxylethyl groups are attached to bridging sulfur atoms by e-type of bond and thus this molecule is an ee conformer.     

CRYSTAL AND MOLECULAR STRUCTURE OF IPOHARDINE PICRATE, C_(15)H_(16)NO·C_6H_2N_3O_7

<正> INTRODUCTION. Ipomoea Hardwickii Hemsl (Ⅰ) belongs to Convolvulaceae, and its seed may be used as an anodyne. Ipoharine and Ipohardine were obtained by Reinickate method from the aqueous solution of Ⅰ. The structure of the title compound has been determined by X-ray crystal structure analysis. The structure of the cation (C_(15)H_(16)NO)~+ is reported here for the first time.     

CRYSTAL AND MOLECULAR STRUCTURE OF 2-PHBNYLQUINOXALINE

<正> C14H10N2,Mr =206.24, space group P21/n, a =5.861(3), b =10.230 (5), c =17.440(11) A,β=92.07(5)°,V= 1045(1) A3,Z=4, Dx=1.31 g.cm-3, MoKa radiation,u=0.73 cm-1,F(000)=432,R=0.063 for 1054 observed reflections. 2-Phenylquinoxaline molecule is approximately planar. The dihedral angle between the quinoxaline ring and the substituted phenyl ring is 7.0°. The C-C bond distance connecting these two rings is 1.495(4) A. The whole molecule is a conjugation system.     

MOLECULAR AND CRYSTAL STRUCTURE OF TETRAHYDROFURAN COORDINATED YTTERBIUM TRICHLORIDES YbCl_3(C_4H_8O)_3

<正> YbCl3(C4H8O)3, Mr = 495. 73, monoclinic, space group P21/c, a = 9.024(2), b=12.863(2), c=15. 762(7) A ,β=92. 21(2)°. V = 1828. 7(9) A3, Z = 4, DC=1. 801gcm-3, A(MoKa) = 0. 71073A, μ= 64. 44cm-1, F (000) = 964, R = 0. 075 for 2259 unique observed reflections. The Yb3+ ion is in a distorted octahedral coordination with three Cl ions and three O atoms from three tetrahydrofuran (THF) molecules. The average Yb -Cl distance is 2. 525A and Yb -O is 2. 303A.     

CRYSTAL AND MOLECULAR STRUCTURE OF IPOHARDINE CHLORIDE, C_(15)H_(16)NOCl

<正> INTRODUCTION. Ipohardine is an alkaloid which can be dissolved in water. It was obtained by Reineckate method from the aqueous solution of Ipomoea Hardwickii Hemsl. In the previous paper we have reported the crystal and molecular structure of Ipohardine Picrate. The structure determination of the title compound is described here. The structure analysis shows that the structure of the title compound is slightly different from the former.     

CRYSTAL AND MOLECULAR STRUCTURE OF μ-ACYL Fe-S COMPLEX (μ-C_2H_5S)[μ-CO-C(CH_3 )=CH_2]Fe_2(CO)_6

<正> The crystal and molecular structure of(u-C2H5S)[μ-CO-C(CH3)-CH2]Fe2(CO)6, Mr = 409.958 has been determined by X-ray diffraction method. Crystals of this complex are monoclinic, belonging to space group P21/c, and the cell parameters are a = 9.191(1), b = 9.666(1), c = 18.47(2)A,β=98.71(1)° V= 1621.9A3,Z=4,Dc=1.68g/cm3.Thg final R and Rw equal 0.058 and 0.089 for 1948 observed unique reflections. The acyl and ethyl-thio groups are bridged to two iron atoms to form an envelope type of structure. The bond lengths of Fe(1)-0(1), Fe(2)-C(1), Fe(l)-S, Fe(2)-S, Fe(l)-Fe(2) involved in the envelope structure are 1.992, 1.980, 2.260, 2.242 and 2.552A, respectively.     

CRYSTAL AND MOLECULAR STRUCTURE OF ο-(2-CYANOETHYL)-BENZOYL FERROCENE OXIME, C_5H_5FeC_5H_4C(C_6H_5)NOC_2H_4CN

<正> INTRODUCTION. The derivatives of ferrocene are found to be increasingly used in the area of the catalysis of combustion reactions of high energy fuels and new material research. Therefore, more attention has been paid to these compounds. This work is a part of our systematic investigation on a     

CRYSTAL STRUCTURE OF A NOVEL TETRANUCLEAR MIXED-METAL CLUSTER Mo_2Fe_2Te_3(CO)_6(C_3H_3)_2

<正> Mr = 984. 63, orthorhombic Imm2, a = 14.562(3), b = 10.391(1), c = 7.139(4) A; V = 1080.2(1) A3, Z = 2, DC = 3.027 g.cm-3. Final R= 0.022 for 620 reflections with I > 20(Ⅰ). In the title compound, four metal atoms form a butterfly configuration, one ,μ-Te is bonded to these four metals and two μ3-Te cap two Fe-Mo-Mo faces. All these atoms as a whole give a bicapped trigonal bipyramidal structure.     

CRYSTAL AND MOLECULAR STRUCTURE OF 1-(4-DIMETHY-LAMINOPHENYL)-2- (3, 4-METHYLENE-DIOXYPHENYL ) ACRY-LONITRILE, C_(18)H_(16)N_2O_2

<正> C18H16N2O2, Mr = 292. 34, monoclinic space .group P21/c, a= 7.972(6), b = 6. 446(3), c=28.906(4)(?); β=95.59(8)°, V = 1478. 3(7)(?)3, Z = 4, Dx =1. 313 g/cm3, R = 0. 049. The non-hydrogen atoms of the title molecule are nearly co-planar forming a conjugation system.     

CRYSTAL AND MOLECULAR STRUCTURE OF BENZO-13-CROWN-4

<正> To elucidate structural relations between benzo-13-crown-4 and its similar crown compound. We determined the crystal structure of the title compound, which is a pure crown. The results of our investigation show that the dihedral angle between the planes of benzo-ring and of the O-atoms in the crown ring is 43.5°. The related distances between O atoms in benzo-13-crown-4 are 2.651 to 4.906, respectively.     

CRYSTAL STRUCTURE OF (C_5H_9C_5H_4)_3Er_4(μ_2-Cl)_6(μ_3-Cl)(μ_4-O)-(THF)_3

<正> The crystal of (C5H9C5H4)Er4(μ2-Cl)6(μ3-Cl)(μ4-O)(THF)3 belongs to triclinic space group P1, with a = 11. 909(4), b = 15.343(5), c=15. 619 (4)(?), α=104. 18(2), β=98. 81(3), γ= 111. 06(2)°, V = 2486(1)(?)3, Z = 2, Dc = 2. 07g/cm3, λ(MoKα) = 0.71073(?), μ= 73. 4cm-1, F(000) = 1476, Mr=1549. 25. The structure was solved by Patterson and Fourier techniques and refined by block diagonel least-squares method to final R = 0. 078 and Rw = 0. 084 for 5594 reflections with I≥1. 5σ(I). The results revealed that the complex is composed of four Er atoms bridged by seven Cl and one oxygen atoms with three of the Er atoms bonded each to a cyclopentylcyclopentadienyl group, and one Er atom, bonded to three THF. The Er atoms constitute a pseudo-tetrahedron.     

CRYSTAL AND MOLECULAR STRUCTURE OF A PHOTOSENSI-TIZER 3-BENZOYLCOUMARINE

<正> 3-Benzoylcoumarine C16H10O3, Mr = 250. 26, monpclinic, space group P21/n, a =11. 744(1), 6 = 16.837(2), c=12. 525(2)A , β= 100. 00(1)°, Z = 8, Dc =1. 363g/cm3, Do = 1. 382g/cm3, F( 000) = 1040, μ(MoKa) = 0. 880cm-1. R and Rw were 0. 048 and 0. 049, respectively, for 2490 observed reflections. X-ray structural analysis reveals that the title compound contains 3 planes intersecting each other with different dihedral angles and thus the whole molecule displays non-planar configuration. This result is consistant with the previous conclusion from photochemical study.