Table 2. Catalytic activities of I and II.

Entry	Ni–diamine–acetates	Additive (x mol%)	Yield (%)*	d.r.†	e.e.
1	Mononuclear I	—	62	>50/1	90
2	Trinuclear II‡	—	52	>50/1	60
3	Trinuclear II§	—	78	>50/1	60
4	Trinuclear II‡	iPr2NH (10)	83	>50/1	90

^*Yields are for isolated materials.

^†Determined by ¹H NMR.

^‡5 mol% of II (Ni-based) was used.

^§5 mol% of II (MW-based) was used.