Conformation of 2,5-substituted 1,3,2-dioxaborinanes studied by NMR
The conformation of a series of 2,5-substituted 1,3,2-dioxaborinanes is studied by PMR. The preferred conformation for the majority of compounds has an equatorial group on atom C(5). The 5-nitroderivative exists in the conformation with an axial nitro group.