Nickel complexes in solution

Dynamic behavior in solution is revealed by variable temperature NMR measurements and is primarily due to inversion at sulfur. The trans-anti and trans-syn isomers are the major species in the solution of the nickel complex. In solutions of Pd and Pt complexes, the cis-anti isomers are also detectable. The cis-anti isomer of the Pt complex has been isolated and is more stable than that of the Pd analogue (64). Hypothetically, a fourth isomer, the cis-syn isomer, may also exist. However, this species may not be stable even at temperatures as low as —50 °C. Inspection of the crystal structure of the trans-anti isomer... 

Singlet Oxygen Quenching Mechanisms of Dithiolene Nickel Complexes in Solution... 

For silica of high surface area (400 m /g), the dissolution is kinefically favored because of the large support-solution interface. Hence, the amount of silicic species is large enough to react with the nickel complexes in solution via a heterocondensation reaction (step 7) ... 

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