Table 1. Selected Distances (Å) and Angles (°) in Ni(I) and Ni(II) Bis(trimethylsilyl)amides.

compound	Ni–N	Ni-donor	N–Ni–N	coord. no. and structure type	∑angles Ni
[K][Ni{N(SiMe3)2}3] (1)	1.931(2)a	N/A	120(2)a	3, ion pair	359.999(8)
[K][Ni{N(SiMe3)2}2] (2)	1.86(1)a	N/A	176.81(6)	2, ion pair	176.81(6)
[K(THF)2][Ni{N(SiMe3)2}3] (3)	1.932(4)	N/A	120.00(6)	3, ion pair	359.99(12)
[K(DME)][Ni2{N(SiMe3)2}3] (4)	1.88(2)a	K-donor	175(1)	3, monomer	360.00(12)
[K2][O(Ni{N(SiMe3)2}2)2] (5)*	1.935(2)a	N/A	130.18(5)	3, monomer	360.00(6)
Ni{N(SiMe3)2}2(THF)2	1.861(3)a	2.0143(2)	140.664(5)	3, monomer	359.86(27)
Ni{N(SiMe3)2}2(py)22	1.942(4)a	1.9310(6)a	179.2607(3)	4, monomer	358.3599(4)
[Ni{N(SiMe3)2}]42	1.916(3)a	N/A	168.85(7)a	2, tetramer	168.85(7)a
	1.9197(14)	1.96(6)a	N/A	4, monomer	360.07
[Na(pmdeta)2][Ni{N(SiMe3)2}3]15	1.929(2)a	Na-donor	120.0(7)a	3, ion pair	359.9(2)
[Li(dmap)4][Ni{N(SiMe3)2}3]14	1.930(2)a	Li-donor	120(2)a	3, ion pair	360.00(8)
Ni{N(SiMe3)2}2(dmap)214	1.949(1)a	1.917(1)a	179.08(6)	4, monomer	356.64(8)
[Ni{N(SiMe3)2}(bipy)]14	1.898(3)	1.947(4)a	N/A	3, monomer	360.01(31)
Ni{N(SiMe3)2}2(bipy)14	1.860(1)	2.030(1)	136.05(6)	4, monomer	415.05(10)
[K(18-crown-6)][Ni{N(SiMe3)2}2]14	1.866(1)	K-donor	180	2, ion pair	180
[K(toluene)][Ni2{N(SiMe3)2}3]14	1.881(16)	K-donor	174.74(5)	3, monomer	359.91(7)

^aAverage value *triclinic data. dmap = 4-dimethylaminopyridine; bipy = 2,2′-bipyridine; pmdeta = N,N,N′,N″,N″-pentamethyldiethylenetriamine.