Table 3. Fitted parameters resulting from a two-dimensional (Ni—N, Ni—O) bond length followed by one-dimensional angle refinement.

	i-pr Ni	n-pr Ni
Ni—N(1), Ni—N(2) (Å)	2.044 ± 0.006	2.128 ± 0.013
Ni—O(1), Ni—O(2) (Å)	2.007 ∓ 0.006	1.958 ∓ 0.012
N—Ni—O ()	85 ± 1	90.24 ± 1.5
	1.07 ± 0.02	0.90 ± 0.03
α	0.9965 ± 0.0029	1.0074 ± 0.0017
, (Å2)	0.0010†	0.0010†
(Å2)	0.0020†	0.0020†
(Å2)	0.0047 ± 0.0020	0.0068 ± 0.0034
(eV)	−0.72 ± 0.64	4.00†
	4.971	9.060
	0.934	0.516

^†Fixed to physical value.