A novel chain structure constructed from copper complexes and dimers based on bi-capped Keggin clusters

A new compound, [Cu(en)2][Cu(en)2(H2O)]2[SiMo8V6O42][Cu(en)2]·1.5H2O (1) (en = ethylenediamine), has been hydrothermally synthesized and characterized by elemental analysis, IR, ESR spectrum, TG analysis and single-crystal X-ray diffraction analysis. Compound 1 represents a 1-D zigzag chain-like structure constructed from dimeric units of bi-capped polyoxoanions {[Cu(en)2]2[Cu(en)2(H2O)]2[SiMo8V6O42]2[Cu(en)2]}6− and transition metal coordination fragment [Cu(en)2]2 +. The adjacent chains are further interconnected into a 3-D supramolecular structure via hydrogen bonds. The magnetic susceptibility of 1 demonstrated the presence of antiferromagnetic interactions.