Ae. Wille et al., SYNTHESIS OF MONO-B-ALKYLCYCLOTRIBORAZANES - STRUCTURAL CHARACTERIZATION OF 2-(PHC(2)H(4))B3N3H11, Inorganic chemistry, 35(17), 1996, pp. 5101
The new mono-B-alkylcyclotriborazanes 2-(PhC(2)H(4))B3N3H11 and 2-(C2H
5)B3N3H11 have been synthesized by reaction of the mono-B-alkylborazin
es 2-(PhC(2)H(4))B3N3H5 and 2-(C2H5)B3N3H5 with HCl, followed by reduc
tion of the 2-RB(3)N(3)H(5) . 3HCl intermediates with NaBH4. A structu
ral determination of 2-(PhC(2)H(4))B3N3H11 confirmed that the B3N3 rin
g adopts a chair conformation with the alkyl group attached to B2 in a
n equatorial position.