1H–NMR spectra of solutions containing various ratios, R = [La]t/[L]t of 0.2, 0.33, 0.5, and 1.0 (from top to bottom) in anhydrous CD3CN (* symbol) at 298 K. The symbols L, #, ^, and + denote signals arising from the L, 1:1, 1:2, and 1:3 species, respectively. L = (R,R)–1).