Mono- and Dinitro-BN-Naphthalenes: Formation and Characterization

Molecules. 2021 Jul 11;26(14):4209. doi: 10.3390/molecules26144209.

Abstract

Mono- and dinitro-BN-naphthalenes, i.e., 1-nitro-, 3-nitro-, 1,6-dinitro-, 3,6-dinitro-, and 1,8-dinitro-BNN, were generated in the nitration of 9,10-BN-naphthalene (BNN), a boron-nitrogen (BN) bond-embedded naphthalene, with AcONO2 and NO2BF4 in acetonitrile. The nitrated products were isolated and characterized by NMR, GC-MS, IR, and X-ray single crystallography. The effects of the nitration on the electron density and aromaticity of BNN were evaluated by B-11 NMR analysis and HOMA calculations.

Keywords: BN aromatics; nitration; nitro-BN-naphthalene; nitro-azaborine.