Table 1.

Optimized bond length (Å) of Ni–N.

Compound 1		Compound 2
Bond	Length	Bond	Length
Ni(22)–N(24)	2.0395	Ni(26)–N(27)	1.9155
Ni(22)–N(27)	2.0595	Ni(26)–N(28)	1.9295
Ni(23)–N(30)	2.0635	Ni(33)–N(34)	1.9345
Ni(23)–N(33)	2.0655	Ni(33)–N(35)	1.9585
Ni(22)–N(10)	1.9685	Ni(26)–N(2)	2.0175
Ni(22)–N(18)	1.9635	Ni(26)–N(8)	2.0625
Ni(23)–N(4)	1.9935	Ni(33)–N(15)	2.1085
Ni(23)–N(15)	1.9715	Ni(33)–N(18)	2.0265