%0 Journal Article
%T Barium Oxalates Combined with Oxo-Anions and Organic Cations: Syntheses and Structures of Ba2(C2O4)(H2PO3)2 and C2H10N2¡¤Ba(H2O)2(HC2O4)4
%A Samuel J. Iveson
%A Chloe B. Johnston
%A William T.A. Harrison
%J Crystals
%D 2011
%I MDPI AG
%R 10.3390/cryst1020059
%X The syntheses and single-crystal structures of Ba 2(C 2O 4)(H 2PO 3) 2 ( 1) and C 2H 10N 2¡¤Ba(H 2O) 2(HC 2O 4) 4 ( 2) are described. Compound 1 is a three-dimensional mixed-anion framework containing BaO 9 coordination polyhedra, which approximate to monocapped square anti-prisms: the connectivity of the BaO 9 units via edges and triangular faces leads to a sheet structure. The oxalate ion in 1 is substantially twisted about its C¨CC bond [dihedral angle between the CO 2 groups = 33.8 (3)¡ã]. Compound 2 is a molecular salt containing ethylenediammonium dications and [Ba(HC 2O 4) 4(H 2O) 2] 2¨C dianions, which are linked by O¨CHLO and N¨CHLO hydrogen bonds. The BaO 10 coordination polyhedron can be described as a distorted pentagonal anti-prism. Crystal data: 1 (C 2H 4Ba 2O 10P 2), M r = 524.68, monoclinic, C2/ c (No. 15), Z = 4, a = 12.3829 (3) £¿, b = 7.9124 (2) £¿, c = 11.0858 (3) £¿, b = 114.788 (2)¡ã, V = 986.10 (4) £¿ 3, R( F) = 0.016, wR( F 2) = 0.040. 2 (C 10H 18BaN 2O 10), M r = 591.60, monoclinic, C2/ m (No. 12), Z = 2, a = 12.7393 (7) £¿, b = 13.0111 (7) £¿, c = 5.6050 (3) £¿, b = 104.208 (4)¡ã, V = 900.62 (8) £¿ 3, R( F) = 0.027, wR( F 2) = 0.054.
%K barium
%K oxalate
%K crystal structure
%K polyhedra
%K hydrogen bonding
%U http://www.mdpi.com/2073-4352/1/2/59