Homogeneous CO Hydrogenation: Ligand Effects on the Lewis Acid ...

Ph 2PCH 2B(C 8H 14)), 1.60 (m, 3H, Ph 2PCH 2B(C 8H 14)), 1.73-1.79 (m, 2H, Ph 2PCH 2B(C 8H 14)), 1.90
(m, 2H, Ph 2PCH 2B(C 8H 14)), 2.16 (br m, 2H, Ph 2PCH 2B(C 8H 14)), 7.07 (m, 6H, Ph 2PCH 2B(C 8H 14)),
7.20 (m, 4H, Ph 2PCH 2B(C 8H 14)), 7.35 (t, J HH = 7.0 Hz, 2H, m-C 5H 5N), 7.75 (t, J HH = 7.6 Hz, 1H,
p-C 5H 5N), 8.45 (d, J HH = 5.2 Hz, 2H, o-C 5H 5N). 31 P{ 1 H} NMR (THF-d 8, 121 MHz): δ -17.1. 11 B
NMR (THF-d 8, 160 MHz): δ -0.2. 13 C{ 1 H} NMR (THF-d 8, 125 MHz): δ 23.30 (br), 25.57,
25.84, 31.24, 33.35, 126.29 (m-C 5H 5N), 127.97 (p-Ph), 128.53 (d, 3 J PC = 6.3 Hz, m-Ph), 133.45
(d, 2 J PC = 19.2 Hz, o-Ph), 140.57 (p-C 5H 5N), 144.86 (d, 1 J PC = 18.2 Hz, ipso-Ph), 146.57 (o-
C 5H 5N). HRMS (FAB + ): m/z calcd. for C 26H 31BNP: 399.2287. Found: 399.2284 (M + ), 320.1907
(M-C 5H 5N), 200.1611 (M-Ph 2PCH 2).
Figure S12. 1 H NMR (~3% residual toluene).
S16