Table 1. Mn³⁺ Bond Lengths in Different Spin States of 1–5.

Mn–X	ClO4– (1)	BF4– (2)	NO3– (3)	Br– (4)	I– (5)
temp (K)	100	100	100	100	100
Mn–Ophen	1.878	1.881	1.890	1.899	1.887
Mn–Nimine	2.102	2.098	2.060	2.012	2.073
Mn–Namine	2.227	2.221	2.165	2.085	2.178
spin state	S = 2	S = 2	mixed	S = 1	mixed
temp (K)	a	a	293	190	a
Mn–Ophen			1.884	1.892
Mn–Nimine			2.092	2.051
Mn–Namine			2.197	2.139
spin state			S = 2	mixed

^aNot measured as magnetism not temperature dependent above 100 K.