Nickel complexes pseudo-octahedral

The formation in solution of nickel complexes with TV-substituted ethylenediamines has been studied over a long period by many authors.707 Solutions of nickel(II) complexes with TV-substituted diamines often exhibit equilibria between pseudotetrahedral and pseudo-octahedral species. These equilibria are displaced towards the pseudotetrahedral species when the temperature increases. Complexes Ni(TV,TV-Et2en)2X2691 with poorly coordinating anions are thermochromic. This behaviour has been investigated by means of calorimetric and NMR studies.708,709... [Pg.72]

Bis(salicylaldoximato)nickel(II) is diamagnetic in the solid state, but becomes partially paramagnetic in solution in chloroform157 and aqueous dioxane.151 This is likely to be due to molecular association or solvation,158 rather than to the adoption of a distorted tetrahedral structure in solution.151 The nickel(II) complex readily forms pseudo-octahedral bis-adducts in the presence of large amounts of amines,159 160 although analogous complexes of commercial orffto-hydroxy-oximes have been reported to retain the square-planar structure in hydrocarbon solution in the presence of moderate amounts of ammonia or aliphatic amines.161... [Pg.800]

Rotthaus O, Labet V, Philouze C et al (2008) Pseudo-octahedral schiff base nickel(II) complexes does single oxidation always lead to the mckel(III) valence tautomer Eur J Inorg Chem 4215 224... [Pg.34]

IV. PSEUDO-OCTAHEDRAL d NICKEL COMPLEXES WITH POLY(4-VINYLPYRIDINE)... [Pg.20]

Pseudo-Octahedral Nickel Complexes with Poly(4-Vinylpyridine) 21... [Pg.21]

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