Acta Cryst. (2004). E60, o97-o98  [ doi:10.1107/S1600536803028538 ]

Unique hydrogen bonding in the acetone-mediated helical structure of (R,R)-3,3'-bisBINOL

T. Kawanami, K. Ishizuka, H. Furuno and J. Inanaga

Abstract: The asymmetric unit of the title compound, C₄₀H₂₆O₄·-2(CH₃)₂CO, consists of one molecule of (R,R)-3,3'-bisBINOL [(R,R)-1,1':3',3'':1'',1'''-quater-2-naphthol] and two acetone molecules. The central feature of the structure is the pair of unique sets of O-HOH-O hydrogen-bond arrangements between the two hydroxy groups of (R,R)-3,3'-bisBINOL and the O atom of acetone, which fixes the axial chirality of the 3,3'-bond as S, thus maintaining the helical structure of the bisBINOL in the M form.

Online 19 December 2003

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