Crystallisation Solvent Influence on the Crystal Structures of MnII and NiII Complexes with 2,6-bis(1-salicyloylhydrazonoethyl)pyridine, H4daps

✍ Scribed by Manuel R. Bermejo; Antonio Sousa; Matilde Fondo; Ana M. González; Olga L. Hoyos; Rosa Pedrido; Miguel A. Maestro; José Mahía

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: German
• Weight: 176 KB
• Volume: 626
• Category: Article
• ISSN: 0372-7874
• DOI: 10.1002/(sici)1521-3749(200002)626:2<506::aid-zaac506>3.0.co;2-e

✦ Synopsis

Neutral manganese and nickel complexes of the empirical formulae Mn(H 2 daps)(H 2 O) 0.5 and Ni(H 2 daps) (H 2 O) 1.5 (CH 3 CN) have been prepared by electrochemical syntheses. The structures of the complexes formed from solvents with different donor ability were investigated. Recrystallisation of Mn(H 2 daps)(H 2 O) 0.5 from pyridine and ethanol yields [Mn(H 2 daps)(py) 2 ] 1 and [Mn(H 2 daps)(C 2 H 5 OH) (H 2 O)] 2. Slow evaporation of dichloromethane and methanol solutions of Ni(H 2 daps)(H 2 O) 1.5 (CH 3 CN) allows the isolation of single crystals of [Ni 2 (H 2 daps) 2 ] ´CH 2 Cl 2 4 and [Ni 2 (H 2 daps) 2 (CH 3 OH) 2 ] ´3 CH 3 OH ´H2 O 5, suitable for Xray diffraction studies. Recrystallisation of 4 from pyridine yields [Ni 2 (H 2 daps) 2 (py) 2 ] ´CH 2 Cl 2 6, previously characterised by us. This study shows the versatility of the H 4 daps ligand and the influence that the crystallisation solvent can have on the crystal structure of these complexes.