With a bis Schiff base N,N' ethylene bis(5 chlorosalicylideneimine) (H 2 L) and K 3 [Co(CN) 6 ], a novel cyanide bridged heteronuclear Co(III)-Mn(III) complex was prepared and characterized by elemen tal analysis, IR spectroscopy and X ray structure determination (CIF file CCDC no. 1029225). The complex crystallizes in the monoclinic space group P2 1 /c with unit cell dimensions a = 10.741 (2), b = 14.015(3), c = 15.074(3) Å, β = 94.237(2)°, V = 2263.0(8) Å 3 , Z = 2, R 1 = 0.0441, and wR 2 = 0.0999. Single crystal X ray diffraction analysis reveals that two [Mn(L)(OH 2 )] + units are linked through a [Co(CN) 6 ] 3-bridge, forming a trinuclear Mn-Co-Mn moiety. The Mn-Co-Mn moieties are further linked through K atoms to form a 1D chain. The chains are stacked through π···π interactions. The Mn and Co atoms are in octahedral coor dination, and the K atom is in square planar geometry.

With a tridentate hydrazone ligand N' (3 bromo 2 hydroxybenzylidene) 2 methylbenzohy drazide (H 2 L) and a bidentate ligand benzohydroxamic acid (HL') with VO(Acac) 2 , a mononuclear vana dium(V) complex was prepared and characterized by elemental analysis, IR spectroscopy and X ray structure determination (CIF file CCDC no. 1029909). The complex crystallizes in the monoclinic space group C2/c with unit cell dimensions a = 27.870(2), b = 11.4893(5), c = 18.467(2) Å, β = 131.444(1)°, V = 4432.6(6) Å 3 , Z = 8, R 1 = 0.0350, and wR 2 = 0.0749. Single crystal X ray diffraction analysis reveals that the V atom is coor dinated by the phenolate O, imino N and enolate O atoms of the hydrazone ligand, and the carbonyl O and hydroxy O atoms of benzohydroxamate ligand, and one oxo O group, in an octahedral coordination. Cata lytic oxidation of the complex on some olefins was performed.