Table 2. Crystallographically determined dihedral angles and conformational assignments of the -O-CH₂-CH₂-O- linkers in 1 and 2.

Guest	Host	Θ 1(°)*/Conf.	Θ 2(°)*/Conf.	Θ 3(°)*/Conf.
'Collapsed'	CS-2	63.9/gauche	−87.7/gauche	−63.9/gauche
Partial occupancy	CC-1	72.3/gauche	−165.3/anti	73.8/gauche
MeOH	2	77.4/gauche	171.9/anti	74.5/gauche
Xe	2 (conf. 1)*	73.4/gauche	−167.2/anti	−175.8/anti
	2 (conf. 2)*	73.5/gauche	−166.9/anti	70.7/gauche
	1	71.9/gauche	−164.8/anti	73.2/gauche
CDCl3	2 (conf. 1)*	75.3/gauche	−174.0/anti	−171.7/anti
	2 (conf. 2)*	75.0/gauche	75.4/gauche	−174.0/anti

*Measured dihedral angles: Θ 1: O₂-C₄₆-C₄₇-O₃; Θ 2: O₈-C₅₆-C₅₇-O₉; Θ 3: O₅-C₅₁-C₅₂-O₆.