25826-24-8Relevant academic research and scientific papers
Synthesis, thermal properties and structural characterisation, of the tetraphenylphosphonium pentaborate salt, [PPh4][B5O 6(OH)4]·1.5H2O
Beckett, Michael A.,Horton, Peter N.,Hursthouse, Michael B.,Timmis, James L.,Sukumar Varma
, p. 199 - 203 (2012)
[Ph4P][B5O6(OH)4]·1. 5H2O (1) was obtained as colourless crystals in high yield from a MeOH/H2O solution of B(OH)3 and [PPh4][OH] (5:1). A single-crystal X-ray study confirmed that the solid-state structure was comprised of supramolecular networks of interconnected anions (H-bonds) and cations (phenyl embraces). Crystals are triclinic, P1 with a = 13.3174(3) , b = 13.3180(3) , c = 16.2055(4) , α = 91.1950(10)°, β = 91.180(2)°, γ = 105.456(2)°, T = 120(2) K, V = 2768.66(11) 3 and Z = 4. TGA/DSC analysis showed that 1 thermally decomposed in air at 800 °C to 2.5B2O3, via a low temperature dehydration step to a condensed pentaborate, [PPh4][B 5O8].
Dehydrohalogenation process
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, (2008/06/13)
Aliphatic and cycloaliphatic halogen compounds containing a halogen atom and a hydrogen atom attached to adjacent carbon atoms are dehydrohalogenated to the corresponding unsaturated compounds by contact with a quaternary ammonium fluoride or quaternary phosphonium fluoride.
