Chemistry of inorganic compounds – Boron or compound thereof – Nitrogen and hydrogen containing
Patent
1986-08-28
1987-06-30
Doll, John
Chemistry of inorganic compounds
Boron or compound thereof
Nitrogen and hydrogen containing
423276, C01B 3514
Patent
active
046769625
ABSTRACT:
The present invention relates to a method of preparing B-trichloroborazine, B.sub.3 N.sub.3 Cl.sub.3 H.sub.3. Generally, the method includes the combination of gaseous boron trichloride in an anhydrous aprotic organic solvent followed by addition of excess gaseous ammonia at ambient temperature or below. The reaction mixture is heated to between about 100.degree. to 140.degree. C. followed by cooling, removal of the solid ammonium chloride at ambient temperature, distillation of the solvent under vacuum if necessary at a temperature of up to about 112.degree. C., and recovery of the B-trichloroborazine. Solvents include, toluene, benzene, xylene, chlorinated hydrocarbons, chlorinated aromatic compounds, or mixtures thereof. Toluene is a preferred solvent. The process provides a convenient synthesis of a material which often decomposes on standing. B-trichloroborazine is useful in a number of chemical reactions, and particularly in the formation of high temperature inorganic polymers and polymer precursors.
REFERENCES:
patent: 2754177 (1956-07-01), Gould
patent: 4578283 (1986-03-01), Kirtley et al.
Earl L. Muettries, editor, Boron Hydride Chemistry, Academic Press, New York (1975), pp. 248, 270.
Charles A. Brown et al., "B-Trichloroborazole", J.A.C.S. 77, 3699 (1955).
Chen Timothy S.
Hsu Ming-Ta S.
Riccitiello Salvatore R.
Brekke Darrell G.
Doll John
Leeds Jackson
Manning John R.
Marchant Robert D.
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