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

1856-1860The 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; L3) in stoichiometric amounts in absolute ethanol-teof and acetone has afforded a series of nickel(II) complexes with the formulae NiX2L.nH2O (X = Cl or Br, L = L1 or L2, n = 2; X = I, L = L2, n= 1; X = Cl, Br or I, L = L3 n = 0), NiI2L1H2O.(CH3)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 NiI2L3.2H2O. The complexes have been characterised by elemental analyses, conductivity and magnetic measurement s, infrared and electronic spectral studies as well as thermal analysis

Cadmium complexes stabilized by bis-benzimidazolyl derivatives

1863-1867Cadmium halides/perchlorate react with bis-benzimidazolyl ligands (1) 1,3-bis(benzimidazol-2-yl)benzene (L1), 1,3 - bis(l-methylbenzimidazol-2-yl)benzene (L2) and 2,6-bis(l-methylbenzimidazol-2-yl)pyridine (L3) in ethanol to produce complexes of the compositions CdX2Ll.nH2O (X = Cl, n = 1, X = Br or I, n = 2), (CdCl2)2L2, CdX2L (X = Br or I, L = L2; X= Cl, Br or I, L = L3 Cd2(L1)3(ClO4).6H2O and Cd(L)2(ClO4)2.nH2O (L = L2, n = 2; L = L3, n = 0). The complexes have been characterized by elemental analyses, conductance measurements, IR, 1H and 13C NMR spectral studies as well as thermal analysis

Synthesis and characterization of Co(II) and Ni(n) complexes of 2-substituted benzimidazoles

463-465Thiocyanates of cobalt(ll) and nickel(ll) react with 2-alkyl substituted benzimidazoles to give complexes of the type M(NCS)2(R-BzlH)2 (where M = Co or Ni; R = Et, n-Pr, i-Pr or n-Bu). Perchlorates of the above metals also react with benzimidazole and its derivatives to yield Ni(i-PrBzIH)2)(CIO4)2, M(R-BzIH)3(CIO4)2 (where M = Co or Ni, R = H or Et; M = Co, R = i-Pr) and M(RBzlH)4 (CIO4)2 (where M = Co or Ni, R = Me or n-Pr; M = Ni, R = n-Bu). On the basis of elemental analyses, conductivity measurements, magnetic moments, infrared and electronic spectral studies, the cobalt complexes have been assigned a distorted tetrahedral stereochemistry and the nickel complexes, a square-planar geometry. Thermal studies of a few thiocyanate complexes have also been carried out

Reactions of Trichloro & Tribromo Complexes of Ruthenium (III) & Rhodium (III) with p- Tolyl Isocyanide

322-32

Substitution Reactions of Carbonyl & Hydridocarbonyl Complexes of Ruthenium(II) & Osmium(II) with p-Tolylisocyanide

571-57

Perchlorate Complexes of Mercury(II) with Tertiary Arsines & Phosphines

436-43

Cationic complexes of palladium(II) containing phosphorus, arsenic, antimony and nitrogen donor ligands

1001-1003Palladium perchlorate reacts with several monodentate tertiary phosphines or arsines in acetonitrile to produce three-coordinate complexes of the type [PdL3[ClO4]2 (L= Ph3P, Ph2EtP, Ph3As, Ph2MeAs, Nap2MeAs, Cy3As, Ph3Sb), while the reaction in tetrahydrofuran leads to four-coordinate complexes of the formula [PdL4][ClO4]2 (L= Ph3P, Ph3As, Ph3Sb). With chelating bidentate ligands, palladium perchlorate yields [Pd(L-L)2][ClO4]2 (L-L= diphos, ɑ-pybzl) complexes

Some π-Cyclooctenyl Complexes of Palladium(II)

1194-119