Crystal structure of cis-1-phenyl-8-(pyridin-2-yl-methyl)dibenzo[1,2-c:2,1-h]-2,14-dioxa-8-aza-1-borabicyclo[4.4.0]deca-3,8-diene

The title compound, C26H23BN2O2, was obtained as by product during synthetic attempts of a complexation reaction between the tripodal ligand H2L [N,N-bis­(2-hy­droxy­benz­yl)(pyridin-2-yl)methyl­amine] and manganese(III) acetate in the presence of NaBPh4. The isolated B-phenyl dioxaza­borocine contains an N→B dative bond with a cis conformation. In the crystal, C—H⋯O hydrogen bonds define chains parallel to the b-axis direction. A comparative analysis with other structurally related derivatives is also included, together with a rationalization of the unexpected production of this zwitterionic heterocycle.