Table 1.

Ammonia Borane Consumption as a Function of [AB] and [Ru] in Slow Catalysis.^a

[AB] Dependence		[Ru] Dependence
AB (M)	Rate (kobs, s−1)b	12 (mol%)	Rate (kobs, s−1)c
0.42	5.99(12) × 10−5	2.5	4.31(7) × 10−5
0.52	7.09(19) × 10−5	3.75	5.13(6) × 10−5
0.73	1.05 (2) × 10−4	5.0	5.99(12) × 10−5
0.94	1.35(4) × 10−4	7.5	7.49(12) × 10−5

^aData calculated from ¹¹B NMR-monitored kinetic studies at 70 °C.

^b[Ru_atom]₀ is 42.0 mM.

^c[AB]₀ is 0.42 M.