Crystal engineering with heteroboranes. III. 2-Carboxy-1-methoxymethyl-1,2-dicarba-closo-dodecaborane(12).
The title compound, 1-CH(2)OCH(3)-2-COOH-1,2-closo-C(2)B(10)H(10) or C(5)H(16)B(10)O(3), forms a discrete centrosymmetric tetramer, via hydrogen bonding, involving two inner and two outer carborane molecules. One conventional eight-membered hydrogen-bonded ring [graph set R(2)(2)(8)] is formed between two carboxylic acid groups of the inner carboranes. This interaction is then supplemented by an open finite hydrogen bond (graph set D) between the ether O atom of the inner carborane and the carboxylic acid H atom of the outer carborane.
Venkatasubramanian
Ulaganathan
U
Department of Chemistry, Heriot-Watt University, Edinburgh EH14 4AS, Scotland. u.venkatasubramanian@hw.ac.uk
Ellis
David
D
Rosair
Georgina M
GM
Welch
Alan J
AJ