The Redox Chemistry of Nickel

Controlled Thiolate Coordination and Redox Chemistry: Synthesis, Structure, Axial-Binding, and Electrochemistry of Dinickel(II) Dithiolate Macrocyclic Complexes

“…The orange-brown oneelectron reduction products of 1 and 3 showed very similar EPR behaviour consistent with a metal-centred reduction to a d 9 Ni I centre (g ͉͉ ϭ 2.11, g -ϭ 2.00). [51] These results are consistent with both the first one-electron oxidations and reductions being largely metal based with little delocalisation onto the ligand. Importantly there Figure 10.…”

“…This shift is to be expected as the Ni III ion will be stabilised by axial coordination of solvent molthe macrocyclic cavity size or by changing from imines to amines, usually has a much larger effect on the potentials ecules, [11] [51] and DMF has a greater tendency to bind axially than MeCN. [48] The results obtained in the non-coordithan is the case here.…”

Nickel(II) Complexes Incorporating Pyridyl, Imine and Amino Chelate Ligands: Synthesis, Structure, Isomer Preference, Structural Transformation and Reactivity Towards Nickel(III) Derivatives

“…The observed g inequality (g Ќ Ͼ g ||) is fully consistent with a tetragonally distorted octahedral geometry with elongation of the axial bond along the z-axis. [2,26,27] Hence a strong JahnϪTeller effect must be operative to lift the degeneracy of the e orbital set following the energy order 3d…”

Generation and Properties of CoI/NiI Species Stabilized by a Tetradentate Pyridylpyrazole Ligand: Crystal Structures of Dialkyl‐CoIII Complexes

“…It has been well-documented that a flexible ligand augments stabilization of Ni I species. [2][3][4][5][6] The key feature of nitrogen heterocycles [7][8][9][10] containing six-membered rings (e.g. 2,2Ј-bipyridine and 1,10-phenanthroline) is their low-lying π*-antibonding orbitals which make them excellent π acceptors; consequently they have been used to stabilize various metal ions in lower oxidation states.…”