The title compound, CHH12BNO4, crystallizes in a trigonal crystal system, space group R3, with two independent molecules A and Β in the asymmetric unit. These molecules show a bicyclooctane structure with different torsion angles of the junction, -22.3° (C 12 -Bi-N 6 -C 7 ) for A and 16.6° (C62-B5i-N 56 -C57) for Β and N->B coordination bond distances of 1.662 (3) and 1.673 (3) Ä, respectively. They are linked to one another by intermolecular interactions C=0 H-CH.
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