Preparation of Borazole by the Reduction of Trichloroborazole^1a

Structural Chemistry of Borazines

“…Synthesis of Fluoroborazines (RN=BF) 3 It is well known that the thermal stability of 2,4,6-trihaloborazines (HN=BX) 3 depends on the halogen atom X and increases in the order of X = I Ͻ Br Ͻ Cl Ͻ F. The compound (HN=BI) 3 is unstable at ambient temperature, [27] (HN=BBr) 3 decomposes slowly at ambient temperature but rapidly at 90°C [28] whereas (HN=BCl) 3 can be sublimed at 65°C. Nevertheless, on storing the latter at 100°C for an extended time, it decomposes with formation of HCl and a diborazinyl.…”

Research on Boron Polymers

“…The product of "several" runs of borazole obtained by the reduction of trichloroborazole with lithium aluminum hydride was thirteen grams (5).…”

“…Thus, Michaelis and his coworkers prepared phenylboron dichloride from the reaction of BC1 on mercury diphenyl (11) and used the same reaction for alkyl benzene derivatives (12). Phenylboron difluoride was prepared from BF 5 and diphenyl zinc (13).…”

An investigation on the synthesis of borazine

“…However, all those reactions involved the use of diborane and gave borazine in small quantity. Later a procedure suitable for laboratory preparation of borazine was reported, which involved the initial preparation of trichloroborazine (TCB) and its subsequent reduction by metal borohydrides [10]. Yet, this approach has some drawbacks such as difficult purification and handling of diborane.…”