Table 2.

Assignment of Absolute Configuration of Compounds 9, 10, 12, and 13 at 15 mol % per OH of (R)- and (S)-Eu(tfc)₃ and Empirical Rules for the Determination of Absolute Configuration of Secondary and Tertiary Alcohols^a

	ΔδR = δCXR - δCYR			Δδs = δCXS - δCYS
Compound	δCXR	δCYR	Δ δ R	δCXS	δCYS	Δ δ S	ΔΔδ = ΔδR - ΔδS
9	44.16	44.73	−0.57	44.23	44.75	−0.52	−0.05
10	90.41	38.87	51.54	90.32	38.73	51.59	−0.05
12	90.53	38.15	52.38	90.53	38.14	52.39	−0.01
13	46.01	43.39	2.62	45.97	43.34	2.63	−0.01

^aThe ¹³C NMR data of alcohols 9, 10, 12, and 13 were recorded in C₆D₆, CDCl₃, acetone-d₆, and CDCl₃, respectively.