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(a) (4R)-(−)-carvone with the isopropenyl group axial to the ring. (b) (4R)-(−)-carvone with the isopropenyl group equatorial to the ring; adapted from Brookes et al. (2009). (c) The ‘twist’ , ‘boat’ and ‘chair’ states (and deviations inbetween) in cyclohexane; adapted from Juaristi (1995). Also, the difference (or lack of) between two-dimensional structures of (d) 5α-diH- and (e) 5β-diH-progesterone is shown.
