Table 2. Twist sense control in o-imine o-phenylenes ^a .

Compound	Conf.	Pop. b	de b	Twist sense c
(R)-oP6(o-tBu)	ii	33%	88%	P
	io	20%	42%	P
	oo	47%	0%	—
(R)-oP6(o-iPr)	ii	25%	68%	P
	io	20%	10%	P
	oo	55%	38%	M
(S)-oP6(o-Et)	ii	25%	20%	M
	io	20%	16%	P
	oo	55%	58%	P
(R)-oP6(o-Cy)	ii	24%	68%	P
	io	17%	8%	P
	oo	59%	54%	M
(S)-oP6(o-Bo)	ii	65%	88%	M
	io	18%	14%	M
	oo	18%	52%	P
(S)-oP6(o-Ph)	ii	28%	74%	n.d.
	io	23%	36%	n.d.
	oo	49%	16%	n.d.

^aConf. = conformer, Pop. = population.

^bDetermined from ¹H NMR deconvolution at 278 K (CDCl₃). Only the perfectly folded state was considered.

^cAssigned as discussed in the text.