MOLECULAR AND CRYSTAL STRUCTURE OF （（C6H5）3P）2Ag（CO2H）

<正> C_37 H_31 O_2P_2Ag, Mr = 677. 47. The crystal structure belongs to mon-oclicnic system with space group Cc. Cell constants a =24. 952(2), b = 9. 179(1), c = 15. 262(1) A ,β= 116. 34 (2)°, V= 3132. 9 (3) A3, Z = 4, Dc = 1. 436g/cm3, D0 = 1. 43g/cm3.The final R achieved is 0. 052 for 5677 observed reflections, F (000) = 673. Like other silver complexes, Ag ( I ) in the center of the complex is 4-coordinat-ed. Formic acid anion also acts as a bidentate ligand in this complex beside two triph-enylphosphine groups.     

CRYSTAL STRUCTURE OF VANADIUM（V） COMPLEX OF SCHIFF BASE

<正> The complex C23H29N2O6V crystallizes as a dark red crystal in monoclinic space group P21/a, with a = 10. 233(2), b = 24.805(8), c= 10. 423(2) (?). β=117. 93(2)°, V =2337.1 (?)3. Mr = 480.43, Z = 4, Dx =1. 368g/cm3, μ = 4. 463cm-1,. F(000) = 1061. The final R is 0. 054 for 1778 observed reflections. X-ray crystallography demonstrates that the ligand in the complex is a condensation pro-suet from l:l 4-tert-butyl-6-formyl salicylaldehyde to benzoyl hydrazine. The compound has a five-coordinated square pyramidal VO3+ gump.     

CRYSTAL STRUCTURE OF ORGANOMETALLIC COMPLEX [Zn（pom）2Br2]

<正> Organometallic complex [Zn (pom)2Br2] (pom = 3-M ethyl-4-Ni-tropyridine-1-Oxide), C12H12Br2N4O6Zn, MT = 533. 44, triclinic, P1, a = 11. 450 (3), b = 13. 027(2), c=6. 605(1)A, α=101. 25(1),β=96. 96(2), γ=108. 06 (2)°,V = 901.2(4)A3, Z = 2, Dc=1. 97 gcm-3,λ(MoKa) = 0. 71069A , F(OOO) = 520, μ= 58. 21cm-1, final R = 0. 040 for 2192 observed reflections, T = 296K. The compound is a mononuclear complex, containing a tetrahedrally coordinated zinc atom.     

CRYSTAL STRUCTURE OF NEODYMIUM（Ⅲ）COMPLEX WITH1，2，4—BENZENETRICARBOXYLIC ACID

<正> [NdC6H3(COO)3(H2O)3]·H2O, Mr=423. 45, orthorhombic,space groupP212121,a=6. 120(3) ,b=9. 719(2) ,c=20. 133(8) A ,V=1197. 5A3.Z = 4,F (000) = 820,DC=2. 35g/cm3,μ(Moka) = 44. 1cm-1.The final R = 0. 0278 and Rw= 0. 0270 for 1760(I>3σ(I)) observed unique reflections. The neodymium ion is nine-coordinated by six oxygen atoms of carboxylato groups from four 1, 2, 4-benzenetricar-boxylates and three aqua molecules,forming a distorted monocapped square antiprism. The Nd -O distances fall in the range of 2. 41 - 2. 70A with an average of 2. 51A