The new binuclear molybdenum(V) complex Na4[Mo2O4(HNTA)2]2·19H2O (NTA = nitrilotriacetate) has been prepared and characterized by single-crystal X-ray diffraction analysis and IR. The crystal has space group Pnma with a = 10.2239(2),b = 23.8174(3),c = 23.1845(4) ,V = 5645.58(16) 3,Z = 4,C24H66Mo4N4Na4O51,Mr = 1702.50,Dc = 1.958 g/cm3,μ = 1.027 mm-1,F(000) = 3280,T = 293(2) K,the final R = 0.0609 and wR = 0.1449 for 5512 observed reflections (I > 2σ(I)). Each MoV atom has a distorted octahedral coordination geometry,and the two coordination octahedra share a common edge to form a dioxo-bridged Mo2O4 unit which is coordinated by NTA ligands. The dianionic binuclear units [Mo2O4(HNTA)2]2- are interconnected by Na+ into a layered structure.
Eight neutral mononuclear complexes constructed from transition metals (M = Co(II), Ni(II), Cu(II), Zn(II), Cd(II)) and ligands N-(2-pyridylmethyl)-L-phenylalanine (L-Hpmpa) and N-(2-pyridylmethyl)-L-tyrosine (L-Hpmtyr) have been synthesized by both hydrothermal and conventional room temperature reactions. Four of them have been structurally characterized by single-crystal X-ray diffractions. They are: [Co(L-pmpa)2·2H2O] 1, [Ni(L-pmpa)2·2H2O] 2, [Cu(L-pmpa)2·2H2O] 3 and [Cu(L-pmtyr)2·2H2O] 4. Single-crystal X-ray analysis, IR and elemental analysis revealed that complexes 1, 2 and 3 are isostructural. Powder X-ray diffraction, IR and elemental analysis revealed that complexes 4, 5 (Zn[L-pmtyr]2·2H2O), 6 (Cd[L-pmtyr]2·2H2O), 7 (Co[L-pmtyr]2·2H2O) and 8 (Ni[L-pmtyr]2·2H2O) are isostructural. The photoluminescence pro- perties of L-Hpmtyr ligand, compounds 5 and 6 were also investigated.
