Formation of H-bonding networks in the solid state structure of a trinuclear cobalt(iii/ii/iii) complex with NO donor Schiff base ligand and glutaric acid as bridging co-ligand: synthesis, structure and DFT study.

A trinuclear linear mixed-valence centrosymmetric cobalt(iii)-cobalt(ii)-cobalt(iii) complex, [Co{(μ-L)(μ-Hglu)Co(OH)}](ClO)·6HO has been synthesized during tetradentate NO donor 'Schiff base' ligand, HL {,'-bis(salicylidene)-1,3-diaminopropane} and glutaric acid (Hglu) as anionic co-ligand. The complex has been characterized by spectroscopic measurements and its solid state structure has been determined by single crystal X-ray diffraction analysis. The supra-molecular assembly formed by the hydrogen bonding interactions in the solid state of the complex has been analysed using DFT calculations.

An insight into the hydrogen bonding, halogen bonding and chalcogen bonding interactions in manganese(iii) complexes with NOdonor salicylidine Schiff base ligands.

Four manganese(iii) complexes, [MnL(HO)]ClO·HO (1), [MnL(HO)]ClO (2), [MnL(DMSO)(HO)]ClO (3) and [MnL(DMSO)(HO)]ClO (4), where HL = ,'-bis(5-bromosalicylidene)-1,3-diaminopropane, HL = 2,2-dimethyl-,-bis(3-methyloxysalicylidene)-1,3-diaminopropane, HL = ,'-bis(5-chlorosalicylidene)-2,2-dimethyl-1,3-diaminopropane and HL = 2-hydroxy-,'-bis(3-ethyloxysalicylidene)-1,3-diaminopropane are tetradentate NO-donor ligands and DMSO = dimethyl sulfoxide, have been synthesized and characterised by elemental analysis, IR and UV-vis spectroscopy and single-crystal X-ray diffraction studies. All are monomeric complexes. Complex 1 crystallises in orthorhombic space group 222, complex 3 crystallises in triclinic space group -1, whereas complexes 2 and 4 crystallize in monoclinic space groups, 2/ and 2/ respectively.