PREPARATION AND B-11 NMR-SPECTRUM OF HEPT ABROMO-CLOSO-HEPTABORATE, [B7BR7](2-), AND THE CRYSTAL-STRUCTURE OF [(C5H5N)(2)CH2][B7BR7]

Authors
FRANKEN A THOMSEN H PREETZ W
Citation
A. Franken et al., PREPARATION AND B-11 NMR-SPECTRUM OF HEPT ABROMO-CLOSO-HEPTABORATE, [B7BR7](2-), AND THE CRYSTAL-STRUCTURE OF [(C5H5N)(2)CH2][B7BR7], Zeitschrift fur Naturforschung. B, A journal of chemical sciences, 51(5), 1996, pp. 744-746
Citations number
7
Categorie Soggetti
Chemistry Inorganic & Nuclear","Chemistry Inorganic & Nuclear
Journal title
Zeitschrift fur Naturforschung. B, A journal of chemical sciences → ACNP
ISSN journal
09320776
Volume
51
Issue
5
Year of publication
1996
Pages
744 - 746
Database
ISI
SICI code
0932-0776(1996)51:5<744:PABNOH>2.0.ZU;2-J
Abstract
By reaction of conjuncto-[B6H6-B6H6](2-) in alkaline solution with exc ess bromine the heptabromo-closo-heptaborate, [B7Br7](2-) is formed. T he crystal structure of [(C5H5N)(2)CH2][B7Br7] has been determined by single crystal X-ray diffraction analysis (monoclinic, space group P2( 1)/a with a = 15.0843(14), b = 9.8882(14), c = 17.057(2) Angstrom, bet a = 114.039 degrees(7)). In accordance with the D-5h point symmetry th e anion shows two singlets at -23.3 and -0.1 ppm with the intensity ra tio 2:5 in its B-11 NMR spectrum.