Table 2. Control Experiments and Broader Applicability of the System in the Alcohol Oxidation^a.

entry	variation from conditions	substrate conversion (%)	yield (%)
1a	none	>95	>95
2a	γ-NiOOH as oxidant	>95	85
3a	β-Ni(OH)2 as oxidant	<5	<5
4a	no oxidant	<5	<5
5a	benzaldehyde as substrate	<5	<5c
6b,f	cinnamyl alcohol as substrate	79 (1 h), >95 (16 h)	79 (1 h), >95 (16 h)d
7b,f	1-phenylethanol as substrate	59 (1 h), >95 (16 h)	59 (1h), >95 (16 h)e

^aConversions and yields are based on (a) GC-analysis using chlorobenzene in acetonitrile as external standard or (b) ¹H-NMR integration using 1,3,5-trimethoxybenzene as internal standard. Superscripts refer to (c) benzoic acid-, (d) cinnamaldehyde- and (e) acetophenone yield. (f) Product formation was also confirmed with GC-MS.