Nickel complexes photochemistry

Maslak P, Sczepanski JJ, Parvez M. Complexation through nitrogen in copper and nickel complexes of substituted meas.J Am Chem Soc. 1991 213 1062-1063. Sczepanski JJ. Divalent metal ion promoted urea solvolysis model studies for Jack Bean Urease and Photochemistry of phosphoryl Azides potential Photoafinity Labels [Ph.D. dissertation]. Pennsylvania The Pennsylvania State University, State College 1994. 

In a series of studies of the spectroscopy and photochemistry of nickel(O) -a-diimine complexes, the structural differences among the complexes NiL2 and Ni(CO)2L (L Q-diimine) have been examined by means of molecular orbital calculations and electronic absorption Raman resonance studies.2471, 472 Summing up earlier work, the noninnocence of a-diimine ligands with a flat — N=C—C=N— skeleton in low-valent Ni chemistry and the course of substitution reactions of Ni° complexes with 1,4-diaza-1,3-dienes or a,a -bipyridine have been reviewed.2473... 

Photochemistry of Oxalate and Dithiooxalate Complexes of Nickel, Palladium, and Platinum... 

Other light-absorbing compounds that may be present in marine aerosol particles and contribute to photochemistry include transition metals, nitrate anions, amines, polyaromatic hydrocarbons, and other organic molecules. Transition metal complexes (including iron, copper, manganese, nickel) are... 

As with the dithiolene complexes of divalent zinc and cadmium, solvated electrons are also observed in the photolysis of dithiolene complexes of nickeKII)/ " The S-alkyl dithiolene complexes of nickel(II) also show interesting photochemistry. For these complexes, photolysis results in cleavage of the S-alkyl The reaction occurs in a stepwise sequence where the slow... 

The photochemistry of dithiolene complexes of selected second- and third-row transition metal ions have also been investigated. Like the complexes with nickel, dithiolene complexes of palladium, platinum, molybdenum, and tungsten catalyze the formation of hydrogen from water when aqueous solutions of the complexes are irradiated at wavelengths shorter than 290 Tetrahydrofiiran is... 

Using a stoichiometric amount of 22, i.e. six equivalents, afforded a mixture of mono- to hexa-alkylated species from which the ligand 23 was isolated by crystallization. The hexa-alkylation process could be enhanced reacting a twofold excess of 22 with the hexaphenol. The ligand CTV(bipy)6 was then isolated in 71 % yield. Again, the H-NMR provided evidence for the hexasubstitution and the Cat, symmetry of the isolated ligand. The compound obtained can accommodate either three square planar (copper(II)) or tetrahedral (copper(I)) transition metals, or, two octahedral transition metals (nickel(II)). The corresponding complexes are of interest in order to study, metal-metal interactions either by electrochemistry, EPR or photochemistry [39]. 

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