Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
[C 6 H 5 CH 2 NH 3 ][B 5 O 6 (OH) 4 ] was obtained as colourless crystals in high yield from a MeOH/ H 2 O (1:1) solution of benzylamine and boric acid (1:5). A single-crystal X-ray study confirmed that the solid-state structure was comprised of a supramolecular H-bonded pentaborate anion lattice, templated by the benzylammonium cations which occupy positions within the lattice cavities. Each pentaborate anion formed 4 H-bonds to 4 neighbouring pentaborate anions at α,α,α,β acceptor sites. Additionally, each cation H-bonds to 3 pentaborate anions. Crystals were monoclinic, P 2 1 /c, with a = 9.3511(2) Å, b = 14.5157(4) Å, c = 10.4670(2) Å, β = 90.778(2)°, T = 120 K, V = 1420.64(6) Å 3 , and Z = 4. TGA/DSC analysis showed that [C6H 5 CH 2 NH 3 ][B 5 O 6 (OH) 4 ] thermally decomposed in air at 800 °C to 2.5B 2 O 3 , via a low-temperature (200–250 °C) dehydration step to a condensed pentaborate.
The slow hydrolysis of B(OMe)3 in a CH2Cl2 solution in the presence of 1,8-C10H6(NMe2)2 (5:1 ratio) led to the formation of the novel isolated pentaborate ester anion [B5O6(OMe)4]-, which was characterized by a single-crystal X-ray diffraction study as the salt [1,8-C10H6(NMe2)2H][B5O6(OMe)4].
J. Becher, T. K. Hansen, N. Malhotra, G. Bojesen, S. Bøwadt, K. S. Varma, B. Girmay, J. D. Kilburn and A. E. Underhill, J. Chem. Soc., Perkin Trans. 1, 1990, 175 DOI: 10.1039/P19900000175
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