Acta Cryst. (2004). C60, m215-m218 [doi:10.1107/S0108270104007450]
Abstract: The title compounds contain the catena-arsenite [AsO2]nn- unit, in which the AsIII atom is pyramidally coordinated to one terminal and two bridging O atoms, resulting in an infinite anionic chain. Ethylenediammonium catena-arsenite, (C2H10N2)0.5[AsO2], is the first example of this anion in the company of an organic cation. The ethylenediammonium species interact with the [AsO2]- chains by way of N-H
O hydrogen bonds. The structure of sodium catena-arsenite, Na[AsO2] [Menary (1958). Acta Cryst. 11, 742-743], has been redetermined to yield more reliable geometrical parameters. The As-O distances are normal and the Na+ cation is seven-coordinate [Na-O = 2.285 (4)-3.063 (4) Å] in a distorted capped trigonal prismatic geometry.
Formula: (C2H10N2)0.5[AsO2] and Na[AsO2]
Online 30 April 2004
 |   Structure factor file (CIF format) (70.7 kbytes) |
| Structure factor file (CIF format) (44.5 kbytes) |
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