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.