arbonyl complexes of rhodium and iridium with tricyclohexyl arsine

Tricyclohexylarsine (L) complexes of Ir and Rh carbonyls were prepd. Thus, treating the carboxylation mixt. from Rh halides with L gave RhXL2(CO) (X = Br, Cl) which added X2 to give RhX3L2(CO)​. Treating the Ir analogs with HX gave IrHX2(CO)​L2, which by dehydrohalogenation gave mixed IrX(CO)​L2 and IrX(CO)​(O)​2L2

Monochelates and bischelates of nickel(II) with bis-benzimidazolyl derivatives

The reaction of the hydrated halides/perchlorate of nickel(II) with bis-benzimidazolyl derivatives (I), namely, 1,3-bis(benzimidazol-2-yl) benzene (bbzlH2bzH; L1), 1,3-bis(1-methylbenzimidazol-2-yl) benzene (bbzlMe2bzH; L2) and 2.6-bis(1-methylbenzimidazol-2-yl)pyridine (bbzlMe2py; L 3) in stoichiometric amounts in absolute ethanol-teof and acetone has afforded a series of nickel(II) complexes with the formulae NiX 2L.nH2O (X = Cl or Br, L = L1 or L 2, n = 2; X = I, L = L2. n = 1; X = Cl, Br or I, L = L3, n = 0), NiI2L1H2O.(CH 3)2CO and Ni(L)2(ClO4) 2.nH2O (L = L1 or L2, n = 0; L = L3, n = 2. The brown iodo complex, NiI2L3 turns green on exposure to atmosphere, giving NiI2L 3.2H2O. The complexes have been characterised by elemental analyses, conductivity and magnetic measurements, infrared and electronic spectral studies as well as thermal analysis

Reactions of zinc salts with bis(Benzimidazolyl) derivatives

Zinc complexes of the formulae ZnX2L·nH2O X = Cl or Br, n = 2, X = I, n = 1, L - L1, 1,3-bis(benzimidazol-2-yl)benzene; X = Cl, Br or I, n = 0, L = L2, 1,3-bis(1-methylbenzimidazol-2-yl)benzene and Zn(L)2(ClO 4)2·2H2O (L = L1 and L 2) were obtained by the reactions of zinc halides/perchlorate with N-heterocycles in ethanol. The complexes have been characterized based on elemental analyses, molar conductance measurements, IR, 1H and 13C NMR spectral studies and thermal analysis

Synthesis and properties of mononuclear and binuclear copper(II) complexes stabilized by bis-benzimidazolyl ligands

The reactions of copper(II) halides with 1,3-bis(benzimidazol-2-yl)-benzene and its N-methylated derivative afforded binuclear and mononuclear complexes, respectively. Mononuclear perchlorate complexes have also been synthesized by the reactions of the aforesaid ligands with hydrated copper perchlorate. The complexes have been characterized by elemental analyses, conductivity and magnetic measurements, TGA studies, IR, electronic, and ESR spectral studies

Studies on palladium(II) complexes containing multidentate N-heterocycles

Palladium dihalides/perchlorate react with the multidentate N-heterocycles (I), 1,3-bis(benzimidazol-2-yl)benzene (L1) 1,3-bis(1- methylbenzimidazol-2-yl)benzene (L2), 2,6-bis(benzimidazol-2-yl) pyridine (L3) and 2,6-bis(1-methylbenzimidazol-2-yl) pyridine (L 4) in ethanol/tetrahydrofuran in presence of hydrohalic acid to yield complexes of the compositions, PdX2L·nH2O (X = Cl, L = L1 or L2, n = 1; X = Cl, L = L3 or L4, n = 0; X = Br, L = L1 or L3 n = 0; X = Br, L = L2, n = 3; X = Br, L = L4, n = 2), PdL 2(ClO4)2·nH2O (L = L 1, n = 2; L = L2, n = 1) and Pd2L 3(ClO4)4·nH2O (L = L 3, n = 2; L = L4, n = 0). The complexes were characterised by elemental analysis, molar conductance measurements, IR, electronic, 1H, 13C NMR and FAB-mass spectral studies