. Author manuscript; available in PMC: 2019 Mar 28.

Published in final edited form as: J Am Chem Soc. 2018 Mar 15;140(12):4204–4207. doi: 10.1021/jacs.7b13681

Table 1.

NO stretching frequencies (cm⁻¹) for (OEP)Fe(NO) •BF₃ and anionic {FeNO}⁸ iron porphyrins.

system	υ_NO	Δυ_NO^a	ref
(OEP)Fe(NO) •BF₃	1425	−241	t.w.
[(OEP)Fe(NO)]⁻	1445	−228	¹⁵
[(TPP)Fe(NO)]⁻	1496	−185	¹⁶
[(TFPPBr₈)Fe(NO)]⁻	~1450	−165	¹⁷
[(3,5-Me-BAFP)Fe(NO)]⁻	~1466	−218	¹⁸
[(To-F₂PP)Fe(NO)]⁻	1473	−214	¹⁸

Δυ_NO with respect to the neutral {FeNO}⁷ precursors.