The four- and five-coordinate complexes [(CNC)NiX(2)] (X = Cl, Br, I), [(CNC)NiX]PF(6) (X = Cl, Br) and [(CNC)NiCl]Cl·H(2)O have been isolated, where CNC is the bis(N-butylbenzimidazolin-2-ylidene)-2,6-pyridine pincer ligand. A five-coordinate geometry is rare for this class of complex. Where amenable, the complexes have been structurally characterised by single crystal X-ray diffraction studie...

The structure of five-coordinate Ru(II) complexes RuHCl(CO)(PPr3)2, 1, RuCl2(CO)(PPr3)2, 2, and Ru(Ph)Cl(CO)(PBu2Me)2, 12, are reported. All three of these complexes have square-based pyramid geometry with the strongest σ-donor ligand trans to the vacant site. These 16-electron complexes do not show bona fide agostic interactions. This is attributed to the strong trans influence ligand (H, CO, ...

An asymmetric copper(I) dimer Cu(1)2(pip)2 [pip = (2-picolyliminomethyl)pyrrole anion] with both two-coordinate and four-coordinate copper(I) sites was synthesized and studied by X-ray diffraction and DFT calculations.

The synthesis of new binucleating pyrazole-derived ligands (HL2, HL3) with bulky 2,6-diisopropylphenylimine side arms and backbone phenyl groups at the pyrazole-C4 and/or at the imine-C, which are derivatives from the known ligand HL1, is reported. Crystallographic analyses of three cobalt(II) complexes coordinated by ligands [L1-3]- reveal distinct metal to ligand ratios and different structur...