Table 2. Ratios of Out and In Isomers in 7a–c/Pyridine Complexes in CD₂Cl₂ Solution at 193 K^a.

complex	out isomer	in isomer
7a/pyridine	77%	23%
7b/pyridine	37%	63%
7c/pyridine	<5%	>95%

^aDetermined by ¹H NMR, Figure 6.