Toward an Arsenic Analogue of Hittorf′s Phosphorus: Mixed Pnicogen Chains in Cu₂P_1.8As_1.2I₂.

Abstract

Structure Structure D 2000Toward an Arsenic Analogue of Hittorf's Phosphorus: Mixed Pnicogen Chains in Cu 2 P 1.8 As 1.2 I 2 .-The title compound is prepared by solid state reaction of a stoichiometric mixture of CuI, red phosphorus, and As (evacuated silica tube, 550°C, 14 d). Cu 2 P 1.8 As 1.2 I 2 crystallizes in the monoclinic space group P2 1 /c with Z = 16 and is fundamentally isostructural to Cu 2 P 3 I 2 ; however, the structure is more complex because of the shared occupancy of the pnicogen positions by P and As. The mixed pnicogen compound exhibits increased thermal stability relative to Cu 2 P 3 I 2 but a similar optical bandgap (E g ≅ 1.2 eV). -(JAYASEKERA, B.; AITKEN, J. A.; HEEG, M. J.; BROCK*, S. L.; Inorg. Chem. 42 (2003) 3, 658-660; Dep. Chem., Wayne State Univ., Detroit, MI 48202, USA; Eng.) -Schramke 18-006