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(CuI)P 4 Se 4 : An Adduct of Polymeric P 4 Se 4 with CuI
Author(s) -
Pfitzner Arno,
Reiser Sara,
Deiseroth HansJörg
Publication year - 1999
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/(sici)1521-3749(199912)625:12<2196::aid-zaac2196>3.0.co;2-e
Subject(s) - crystallography , orthorhombic crystal system , crystal structure , raman spectroscopy , chemistry , adduct , polymer chemistry , physics , organic chemistry , optics
Pure yellow (CuI)P 4 Se 4 was prepared by reaction of stoichiometric amounts of CuI, red P, and gray Se in evacuated silica ampoules. The crystal structure was determined from single crystals at room temperature. (CuI)P 4 Se 4 crystallizes in the orthorhombic system, space group Cmca with a = 14.770 (1) Å, b = 12.029 (1) Å, c = 12.449 (1) Å, V = 2211.9(6) Å 3 , and Z = 8. The structure refinement converged to R = 0.0190 ( wR = 0.0272) for 1020 independent reflections and 51 parameters. A prominent feature of the crystal structure are neutral polymeric P 4 Se 4 strands which are connected by copper iodide. These strands consist of norbornane analogous P 4 Se 3 cages which are linked by selenium bridges. The polymers are achiral since a mirror plane exists perpendicular to the strands. The single polymers are connected by [Cu 2 I 2 ] units to form layers. These layers are stacked along the b axis and are connected by van der Waals‐interactions only. Raman spectra of (CuI)P 4 Se 4 differ significantly from Raman spectra of (CuI) 3 P 4 Se 4 and catena ‐(P 4 Se 4 ) x .