Synthesis, structure and characterization of a novel asymmetrical half-sandwich binuclear iron carborane complex [eta(5)-C5H3 (t-Bu)(2)](2)Fe-2 (CO)(3)Se2C2B10H10

Halfsandwich iron dicarbonyl complex [eta(5)-C5H3(t-Bu)(2)]Fe(CO)(2)Cl(1) reacts with 1, 2-dilithium diseleno carborane Li(2)Se(2)C(2)B(10)H10 (2) to give a binuclear iron carborane complex [eta(5)-C5H3(t-Bu)(2)](2)Fe-2(CO)(3) Se2C2B10H10(3). The X-ray diffraction analysis of complex 3 reveals that one of the iron atoms is chiral.

Synthesis and structure of iron complex with 1,2-dithiolate-1,2-dicarba-closo-dodecaborane [Li(THF)(4)][Fe(S2C2B10H10)(2)(THF)]

The crystal of complex [Li(THF)(4)][Fe(S2C2B10H10)(2)(THF)] 3 belongs to monoclinic, space group P2(1) with a = 11.964(2), b = 16.527(3), c = 12.554(3) Angstrom,beta = 108.70(3)degrees, V= 2351.3(8) Angstrom(3), Z = 2, M-r = 835.95, D-c = 1.181 g/cm(3), mu (MoKalpha) = 5.30 cm(-1), f(000) = '874, R = 0.0622 and Rw 0.1538 for 1641 observed reflections with I > 2sigma(I). The ionic complex,of 3 contains the square pyramidal anion of [Fe(S2C2B10H10)(2)(THF)](-) and the tetrahedral cation of [Li(THF)(4)](+). The iron is 5-coordinated and located in the square pyramidal configuration. The iron atom and the four sulfur atoms are almost coplanar. The Lithium atom is coordinated with four oxygen atoms of four THF molecules and located in a tetrahedral configuration.

Synthesis, characterization and molecular structure of a novel asymmetrical half-sandwich binuclear iron carborane complex Cp ' Fe-2(2)(CO)(3)(Se2C2B10H10)

The half-sandwich methylcyclopentadlenyl iron carbonyl complex reacted with 1,2-dilithium diselenolate carborane Li2Se2C2B10H10 (1) which was produced by the insertion of element Se into 1, 2-dilithium carborane to give a half-sandwich binuclear iron carborane complex Cp'Fe-2(2)(CO) 3Se2C2B10H10 (3). X-ray structural analysis of complex 3 reveals that one of the iron atoms is chiral.

Assembly of the transition metal substituted polyoxometalates ZnW11M(H2O)O-39(n-) (M = Mn, Cu, Fe, Co, Cr, Ni, Zn) on 4-aminobenzoic acid modified glassy carbon electrode and their electrochemical study

Through layer-by-layer assembly, a series of undecatungstozincates monosubstituted by first-row transition metals, ZnW11M(H2O)O-39(n-) (M=Cr, Mn, Fe, Co, Ni, Cu. or Zn) were first successfully immobilized on a 4-aminobenzoic acid modified glassy carbon electrode surface. The electrochemical behaviors of these polyoxometalates were investigated. They exhibit some special properties in the films different from those in homogeneous aqueous solution. The Cu-centered reaction mechanism in the ZnW11Cu multilayer film was described. The electrocatalytic behaviors of these multilayer film electrodes to the reduction of H2O2 and BrO3- were comparatively studied.