Amine and related complexes

Sramko and E. Jona, Coll. Czech. Chem. Comm., 1972, 37, 1645. 676 Y Fukuda and K. Sone, J. Inorg. Nuclear Chem., 1972, 34, 2315. 

2-Methylbenzimidazole (L) forms the complexes NiL2X2 (X = Cl, Br, or I) which are all pseudo-tetrahedral. 2-Benzylbenzimidazole (Dibaz) forms the complexes [Ni(Dibaz)2X2]. When. X = SCN, the complex is dimeric with bridging SCN when X = Cl or Br, octahedral or pseudo-octahedral structures are adopted when X = I, the complex is square-planar. The ligands 2-(2 -pyridyl)benzimidazole (L ) and 2-(2 -pyridyl)imidazoline (L ) form the complexes Ni(L )3X2 and Ni(L )2-X2 (X = Cl, Br, I, or NCS). All the complexes are high-spin.  

Pyrazole (pz) and 3(5)-methylpyrazole (mpz) react with metal salts in acetone or ethanol in a variety of molar ratios, yielding [Ni(pz)4X2], [Ni(pz)g(N03)2], 

Macrocyclic N-donor ligands. Nickel complexes of macrocyclic ligands have been studied by cyclic voltammetry, and the irreversible or quasi-reversible couples Ni L Ni L Ni L have been established. The structure of (124) has been reported and the co-ordination is essentially square-planar with a slight tetrahedral distortion. The reaction of [Ni(pn)3] with 

Complexes of the strained macrocyclic ligand (134) have been prepared. The complex [NiL(N03)2],- H20 is octahedral however, [NiLCl2],fH,0 and [NiLCl](C10J,H20 [L = (134)] are the first nickel(ii) complexes containing 

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