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An Improved Synthesis of Borazine with Aluminum Chloride as Catalyst
Author(s) -
Li Junsheng,
Zhang Changrui,
Li Bin,
Cao Feng,
Wang Siqing
Publication year - 2010
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201000015
Subject(s) - borazine , chemistry , sodium borohydride , catalysis , borohydride , inorganic chemistry , chloride , fourier transform infrared spectroscopy , boron , aluminium , ammonium chloride , boron nitride , chemical engineering , organic chemistry , engineering
Borazine is an excellent precursor for boron nitride. However the existing synthetic methods for the preparation of borazine have drawbacks such as relatively high reaction temperatures, side reactions, long reaction times, and low yields. An improved synthesis procedure was disclosed, which involved the use of aluminum chloride as a catalyst in the reaction of sodium borohydride with ammonium sulfate. The aluminum chloride catalyst brought the reaction temperature down from 120–140 °C to 45 °C. Improved yields of borazine were obtained in comparison to the reaction without a catalyst. In addition, the reaction process was investigated in detail by 11 B NMR spectroscopy and Fourier transform infrared spectroscopy (FTIR). It was found that aluminum borohydride formed in very small quantity when aluminum chloride was introduced, which plays an important role in the reaction.