%0 Journal Article
%T Potassium [1-(tert-butoxycarbonyl)-1H-indol-3-yl]trifluoroborate hemihydrate
%A Guillaume Berionni
%A Peter Mayer
%A Herbert Mayr
%J Acta Crystallographica Section E
%D 2012
%I International Union of Crystallography
%R 10.1107/s1600536812014225
%X The asymmetric unit of the title salt, K+¡¤C13H14BF3NO2¡¤0.5H2O, consists of two derivatized indolyltrifluoridoborate anions, two potassium cations and one water molecule. Within the indolyltrifluoroborate anions, the least-square planes consisting of the carboxyl group and the adjacent quarternary C atom of the tert-butyl groups deviate significantly from coplanarity with the indolyl planes [20.44 (11) and 21.02 (10)¡ã]. The potassium ions are coordinated by six atoms (one K+ ion by two O and four F atoms, and the second K+ ion by one O and five F atoms), however, one of the potassium ions undergoes an additional weak potassium¨C¦Ð interaction (K...centroid = 3.722  ). The packing is stabilized by sequential O¡ªH...O hydrogen bonds along [100] between water molecules and also by O¡ªH...F hydrogen bonds.
%U http://scripts.iucr.org/cgi-bin/paper?S1600536812014225