Untersuchungen zur Reaktivität von Organo-Nickel-Verbindungen – „Spin-Trapping”︁ als Indikatormethode für die relative Reaktivität von Nickel-Kohlenstoff-Bindungen

Investigations to the Reactivity of Organonickel Compounds – “Spin Trapping” as an Indicator Method for the Relative Reactivity of Nickel-Carbon Bonds The spin trap nitrosodurene reacts with σ-alkyl, σ-aryl, π-allyl, σ-allyl, and π-cyclopentadienyl compounds of nickel(II) to form nitrosoduryl radicals which can be detected by ESR spectroscopy. Nickelolefine and nickel heteroolefine complexes do not react by formation of radicals. The spin trapping method can be generally used as an indicator for determination of structure elements in organonickel compounds and for determination of the relative reactivity of σ- and π-bonded groups.     

Zum Zusammenhang zwischen Ligand-Acidität und Metallkomplex-Stabilität: Abnehmende Stabilität bei zunehmender Basizität

The increase of the stability of metal ion complexes with decreasing basicity of the ligands within different series is discussed with the help of the equation of IRVING & ROSSOTTI [4] [12] and explained in terms of the free energy G of the complexes.