fig1

Figure 1. ¹H NMR spectra (500 MHz, 300 K) in DMSO-d₆of: 1 (A); LA (B); SA (C), LB (D); and SB (E). ³¹P{¹H} NMR spectra (500 MHz, 300 K) in DMSO-d₆of: 1 (F); SA (G); and SB (H). ESI-MS spectra of SA (I) and SB (J). DFT-optimized ground-state structure of SA (K) and single-crystal X-ray structure of SB (L). Carbon atoms of ligands LA and LB are gray, carbon atoms of acceptor 1 are green, nitrogen atoms are dark blue, oxygen atoms are red, phosphorus atoms are pink, and platinum atoms are orange. Hydrogens and counterions OTf^- (trifluoromethanesulfonate) anions are omitted for clarity.