Table 4.

EPR Parameters for Selected Low-Spin Iron–Nitrosyl Species Produced in Enzymatic Sites and Model Complexes

	g-values			A-values (MHz)
${\{\text{ES}-\text{NO}\}}^7(S=1/2)$	$g_1$	$g_2$	$g_3$	A2 (14N)	A2 (14N)	A2 (14N)	ref
wild-type Mm ES-NO	2.071	2.022	1.976	27	60	28	36
Y157F Av ES-NO	2.080	2.017	1.984	34	50	24	this work
wild-type Av ES-NO (pH 9.4)	2.071	2.014	1.981	35	53	39	this work
$\text{Fe}(\text{NO})\left({\text{N}}_3\text{PyS}\right)]\cdot {\text{BF}}_4$	2.047	2.007	1.962	40	59	40	63
$\left[{\text{L}}^{\text{Pr}}\text{Fe}(\text{NO})\right]\cdot 2.5{\text{CH}}_2{\text{Cl}}_2$	2.072	2.021	1.992	47	62	50	59
$\text{DNIC}\left[\text{Fe}{(\text{NO})}_2{\text{L}}_2\right]$	2.040	2.036	2.015	-	-	-	this work