1334. Borazine

Nomenclature

CAS number: 6569-51-3
Inorganic benzene; hexahydro-s-triazaborine; borazane; borazole; triborine triamine; triboron nitride; s-triazaborane.
B3H6N3; mol wt 80.50.
B 40.29%, H 7.51%, N 52.20%.

Description and references

Isoelectronic with benzene. Prepn: Stock, Pohland, Ber. 59, 2215 (1926); Wiberg, Bolz, Ber. 73, 209 (1940). Structural study: H. Watanabe, W. Kubo, J. Am. Chem. Soc. 82, 2428 (1960); W. Harshbarger et al., Inorg. Chem. 8, 1683 (1969). Electronic structure: A. Ltz et al., Chem. Phys. 103, 317 (1986). Raman spectroscopy: J. V. Kainnady, A. Weber, J. Raman Spectrosc. 5, 35 (1976). Electric and magnetic properties: G. R. Dennis, G. L. D. Ritchie, J. Phys. Chem. 97, 8403 (1993). Use in synthesis of ceramic composites: K. Su et al., Chem. Mater. 5, 547 (1993). Review: E. M. Smolin, L. Rapoport, s-Triazines and Derivatives (Interscience, New York, 1959) pp 597-626.

Chemical structure

Properties

Mobile liquid; mp 58°; bp 53°. Stable up to 500° when pure and totally anhydrous. d40 0.824; d457 0.898. nD20 1.3821. Critical temp 252°. Heat of vaporization 7.0 kcal. Mol vol at bp = 99.7 ml. Surface tension at mp = 31.09 dynes/cm. Parachor 207.9. Trouton's constant 21.4. Etvs' constant 2.0. Dipole moment in benzene (25°) = 0.50. Dissolves in water, giving a soln with strong reducing properties. Hydrolyzes slowly in aq soln yielding hydrogen, boric acid, and ammonia.