ECCD of chiral bis-phosphine oxides bound to Zn-MAPOL 2.

Entry	Predicted sign	λ nm, Δε	A/Acorra
	Positive	427, +416	+612
		418, −196
	Negative	427, −426	−654
		418, +228
	Negative	429, −1838	−3460
		420, +1622
	Positive	429, +332	+586
		421, −254
	Negative	427, −1646	−2770
		419, +1124
	Positive	427, +1862	+3110
		419, −1248
	Negative	427, −1350	−2154
		418, +804

^a A corresponds to the amplitude for the ECCD spectrum, measured with the addition of 1 equiv. of the bis-phosphine oxide to a 1 μM Zn-MAPOL 2 solution.