Abstract
Four new octahedral cadmium(II) complexes, [(Cd)(L1)(HL1)](ClO4) (1), [Cd2(L2)2(SCN)2(CH3OH)2] (2), [(CdL3)3(μ-1,1,1-OH)](ClO4)2 (3) and [Cd2(L4)2(SCN)(NO3)] (4) have been synthesized using four Schiff bases, HL1, HL2, HL3 and HL4, (where HL1=2-(2-(ethylamino)ethyliminomethyl)phenol, HL2=2-(2-(dimethylamino)ethyliminomethyl)-4-bromophenol, HL3=2-(2-(diethylamino)ethyliminomethyl)-6-methoxyphenol and HL4=2-(2-(ethylamino)ethyliminomethyl)-6-methoxyphenol). All four complexes have been characterized by elemental and spectral analysis and structures have been confirmed by single crystal X-ray diffraction studies. Complex 1 is a mononuclear cationic bis-ligand complex. Complex 2 features a double end-to-end thiocyanate bridged dinuclear cadmium(II) complex. Complex 3 has a partial cubane [Cd3O4] core in which three [CdL3] subunits are interconnected through two types of oxygen bridges afforded by phenoxo oxygen atoms of ligands and a central hydroxo group. Complex 4 has a double phenoxo bridged dinuclear structure. Supramolecular interactions in all four complexes were also explored. All four complexes show fluorescence.
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