Dinuclear nickel(ii) complexes of reduced asymmetric compartmental ligandsIn memoriam Noel McAuliffe (1941–2002).

Bis(μ-acetato)(μ-2,6-bis{[(2-hydroxyethyl)(2-pyridylmethyl)amino]methyl}-4-methylphenolato)dinickel(II) hexafluorophosphate hemihydrate

“…The average separation between the two Ni atoms in (I) is 3.399 (1) A Ê , which is comparable to that in urease (3.5 A Ê ; Jabri , 1995) and also similar to the NiÁ Á ÁNi distances in most of the reported`end-off' compartmental ligand-derived dinuclear nickel complexes with additional bridges (Koga et al, 1998;Uozumi et al, 1998;Adams et al, 2003;Carlsson et al, 2004). (Buchanan et al, 1989).…”

The generation of a trinuclear cobalt (II) core supported by differing tridentate acetate bridges

“…When a five-membered chelate ring was introduced at the iminic binding site double syn-syn acetate bridging, as in 3, was noted. This mode of interaction has also been observed in dinickel(II) complexes of reduced asymmetric Schiff base compartmental ligands which induce a five-membered chelate rings at the metal atoms [13].…”

18 Macrocyclic and supramolecular coordination chemistry

“…136 Dinuclear, tetranuclear and pentanuclear nickel() complexes of the related, reduced asymmetric compartmental ligands (L 140/141 ) (have been synthesised. 137,138,139 The assembly of the dinuclear complex includes one -OH bridge whereas the pentanuclear nickel() complexes includes 3-OH bridges and the tetranuclear nickel() complex contains an intramolecular [H 3 O 2 ] 2 bridge. A new ligand, H 2 L 142 , bearing four coordination sites that may be metallated in a stepwise manner has been synthesised and complexed with Cu() and Fe() salts.…”