First-order rate law plots of the reaction of substrate 2 in cavitand 1 with (a) 5 mol % 1, 25 mM 2 in mesitylene-d12 (blue circles), (b) 5 mol % 1, 25 mM 2, 10 mol % CH2Cl2 in mesitylene-d12 (green squares) and (c) 5 mol % 10, 25 mM 2, 10 mol % CH2Cl2 in mesitylene-d12 (red triangles).