Organoboron compounds

Conclusions ³J_HH SSCC values and the¹³C chemical shifts of derivatives of 3-borabicyclo[3.3.1]nonane with a three-coordinated boron atom have a flattened double-chair conformation. The derivatives with a four-coordinated boron atom and a substituent at the 7 position have predominantly the chair-boat conformation, and the cyclohexane ring has the boat form; the the exceptions are the compounds with an internal donor-acceptor bond between boron and the 7 substituent.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 2, pp. 341–352, February, 1981.