Results from the fitting of compounds Co(2), Co(3) and Zn/Co(4), including D, E, g_x, g_y, g_z and zJ parameters.

	Co(2)	Co(3)	Zn/Co(4)	Confidence interval
D (cm−1)	46.3	48.0	55.1	±0.4
E (cm−1)	9.4	11.4	14.0	±0.2
g x	1.73	1.86	2.09	±0.02
g y	2.60	2.58	2.51	±0.01
g z	3.13	3.00	2.91	±0.01
zJ (cm−1)	−0.012	−0.017	−0.019	±0.001