Borazine, Chemistry

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Reaction of ammonia with diborane at 475K gives a compound B3N3H6 known as borazine or borazole:

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Borazine is best prepared by reducing B-trichloroborazme with sodium borohydride,  NaBH4. B-trichloroborazine is first prepared by heating BCl3 with NH4CI.

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Borazine has many physical properties closely similar to those of isoelectronlc benzene as shown in Table 6.4. Therefore, sometimes it is also called as inorganic benzene.

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Borazine, however, is more reactive than benzene. It readily reacts with H20, MeOH and HX to yield 1:3 adducts which eliminate Hz on being heated to 373 K, e. g :

B3N3 H6+3H2O--------------- >[BH(OH)NH2] 3---------------->[B(OH)NH]3+3H2

B3N3H6+3HCL-------------- >[BH (Cl) NH2]3------------------>B3N3HECL3+3H2


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