Oxidopolyborate chemistry: The self-assembled, templated, synthesis, and an XRD study of a 1-D coordination polymer, [Cu(en){B6O7(OH)6}].3H2O (en = 1,2-diaminoethane)

[Cu(en){B6O7(OH)(6)}](.)3H(2)O (1) (en = 1,2-diaminoethane), obtained as a crystalline solid in low yield (31%) after prolonged standing of an aqueous solution initially containing [Cu(en)(2)](OH)(2)and B(OH)(3)(1:7 ratio), was characterized by thermal analysis (TGA/DSC),B-11 NMR and IR spectroscopy, powder XRD, and single-crystal XRD studies, and magnetic susceptibility measurements. The single-crystal X-ray diffraction revealed that the oxidoborate complex is a 1D coordination polymer with the hexaborate(2-) ligand bridging two hexacoordinate Cu((II))centers, in an alternating afac-tridentate (kappa(3)-O) and monodentate (kappa(1)-O) arrangement. Cu-O coordination bonds and extensive H-bonding networks promote and stabilize the self-assembly of [Cu(en){B6O7(OH)(6)}](.)3H(2)O from the Dynamic Combinatorial Libraries of available reactants. [Cu(en){B6O7(OH)(6)}](.)3H(2)O is thermally decomposed to CuB(6)O(10)in air at 700 degrees C.