A unique supramolecular structure of poly [mu-oxo- bis(1,1,2,3,4,5-hexahydro-1-nitratotellurophene)] [(C4H8TeNO3)(2)O](n) with ---O-Te-O-Te-O-- crosslinked chains

Poly [mu-oxo bis(1,1,2,3,4,5-hexahydro-1-nitratotellurophene)] I, is prepar ed by the room temperature reaction of 1,1,2,3,4,5-hexahydro-1,1-diiadotell urophene with silver nitrate in deionised water. Crystals of 1 are monoclin ic, space group C2/c with a=13.930(2) Angstrom, b =11.665(2) Angstrom, c=10 .0682(11) Angstrom, beta=116.264(8)(0) and Z=4. The monomeric unit of the t itle compound is centrosymmetric, with an angular TeOTe skeleton containing bridging O atom at the centre of symmetry. These monomeric units are linke d together through ---O-Te- O-Te -O--- cross linked chains and the nitrate groups are asymmetrically bidentate with a primary Te-ONO2 and a secondary Te---O semibonding interaction. Each nitrate group further participates in another Te---O semibonding interaction forming another asymmetric Te(NO3)(2 )Te bridge. The structural characteristics of I are compared with related c omplexes.