Beiträge zur Chemie des Bors, 153 [1] Die Kristall- und Molekülstruktur eines 1.3.2-Dioxaborolan-2-yl-1.3.2-dioxaborolans

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Abstract
The structure of the title com pound 5 has been investigated by X-ray crystallography in order to discern between two structural alternatives. 5 crystallizes in the monoclinic space group P21/c, and almost planar B-B bonded dioxaborolane rings are present in the molecule. 5 possesses a crystallographically imposed center of inversion, and approaches the point group symmetry D2h-