CRYSTAL-STRUCTURE OF CU12P20BR10, A POLYPHOSPHIDE CONTAINING A NEW PHOSPHORUS POLYMER

We report about the crystal structure of Cu<INF>12</INF>P<INF>20</INF> Br<INF>10</INF>, a polyphosphide containing the new polyanionic phosph orus polymer ty</INF><SUP>1</SUP>[P<INF>20</INF><SUP>2-</SUP>]. It cry stallizes in the triclinic system, space group <P(1)over bar> (No. 2) with a = 9.886 (2) Angstrom, b = 13.190(2) Angstrom, c = 14.763(3) Ang strom, alpha = 70.83(1)degrees, beta = 82.68(1)degrees, gamma = 80.13( 1)degrees, V = 1786.1(6) Angstrom<SUP>3</SUP> and Z<SUP></SUP> = 2. Th e The phosphorus atoms build up one dimensional negatively charged tub es consisting: of condensed 5- and 6-membered rings. They are connecte d via copper atoms to form double tubes oriented parallel [010] and ar e embedded between wavy layers of copper and bromine atoms, All copper atoms except those that are linked to negatively charged P-atoms are strongly disordered.