Open AccessStructures of Na 9 [SO 4 ] 4 X ·2H 2 O 2 , where X = Cl or Br, in which the halide anions orchestrate extended orientation sequences of H 2 O 2 solvate molecules
Author(s) -
Pritchard Robin Gavin,
Begum Zubeda,
Lau Yuf Fai,
Austin Jonothan
Publication year - 2005
Publication title -
acta crystallographica section b
Language(s) - English
Resource type - Journals
eISSN - 1600-5740
pISSN - 0108-7681
DOI - 10.1107/s010876810503212x
Subject(s) - halide , tetragonal crystal system , bromide , crystallography , substructure , chemistry , molecule , chloride , inorganic chemistry , crystal structure , organic chemistry , structural engineering , engineering
Detailed structures of nonasodium tetrakis(sulfate) chloride diperhydrate, Na 9 [SO 4 ] 4 Cl·2H 2 O 2 , and its novel bromide analogue are compared. Hydrogen peroxide could not be resolved in a previously reported Na 9 [SO 4 ] 4 Cl·2H 2 O 2 substructure [tetragonal, P 4/ mnc ; Adams et al. (1978), J. Chem. Soc. Chem. Commun. p. 288; Adams & Pritchard (1978), Acta Cryst. B 34 , 1428–1432]. However, on lowering the symmetry to P 4/ n , and using reflection data based on full unit‐cells, the H 2 O 2 solvate can be clearly seen. Although H 2 O 2 molecules are not directly bonded to the halide anions, they exert considerable influence on the eight sodium cations that constitute each halide's coordination shell so that H 2 O 2 ordering can be linked to halide dimensions.