ABSTRACT
The reactions of N-salicylidene-o-aminophenol or its derivatives and excess of nickel(II) acetate in alcohols have led to Ni(II)20 clusters with an unprecedented "bowl" metal topology.
ABSTRACT
The reactions of Co(II) sources with N-salicylidene-o-aminophenol (H2saph), N-salicylidene-o-amino-4-methylphenol (H2saph-4Me) and N-salicylidene-o-amino-4-chlorophenol (H2saph-4Cl) were studied in MeOH. The new solid complexes (Bu4(n)N)[Co(III)(saph)2] (1), (Et3NH)[Co(III)(saph-4Me)2]â MeOHâ MeCO2H (2â MeOHâ MeCO2H) and (Et3NH)[Co(III)(saph-4Cl)2]â MeOHâ MeCO2H (3â MeOHâ MeCO2H) have been isolated and their structures determined by single-crystal, X-ray crystallography. The three compounds contain the mononuclear, low- spin octahedral anion [Co(III)L2](-) (H2L=H2saph, H2saph-4Me, H2saph-4Cl), in which both L(2)(-) ligands act as tridentate chelating, meridional ONO donors. The crystal structures of 2â MeOHâ MeCO2H and 3â MeOHâ MeCO2H are built through H-bonding and π-π stacking interactions. The new complexes were characterized by elemental analyses and spectroscopic (IR, Raman, UV/VIS, (1)H NMR) data. All data are discussed in terms of the nature of bonding and known structures.
Subject(s)
Cobalt/chemistry , Organometallic Compounds/chemistry , Phenols/chemistry , Schiff Bases/chemistry , Crystallography, X-Ray , Magnetic Resonance Spectroscopy , Molecular Conformation , Molecular Structure , Spectrophotometry, Ultraviolet , Spectrum Analysis, RamanABSTRACT
Three structurally and magnetically different tetranuclear Ni(II) complexes have been isolated and magnetically characterized, emphasizing the effect of the reaction solvent and organic ligand substitution on the chemical identity of cluster compounds.