. Author manuscript; available in PMC: 2020 Apr 10.

Published in final edited form as: J Am Chem Soc. 2019 Mar 29;141(14):5942–5960. doi: 10.1021/jacs.9b00795

Table 2.

Spectroscopic Characterization of Lewis Acid F₈Compound-II Derivatives^a

	UV-vis	Mössbauer^b		Fe XAS	rR
	Soret, Q-band (nm)	δ (mm/s)	ΔE_Q (mm/s)	pre-edge area^d	ν(⁵⁷Fe=O) (Δ⁵⁷⁻⁵⁴Fe) (cm⁻¹)
F₈Cmpd-Il(LutH⁺)	413, 546	0.08	2.23	48.8(1.5)	819(4)
					ν₄: 1371
					ν₂: 1573
(DCHIm)F₈Cmpd-Il(LutH⁺)	418,	0.07	1.30	25.0	-^c
	539			(1.0)

All these complexes are EPR silent via perpendicular mode EPR spectroscopy at 10 K.

The values for the major species are reported in this table. See SI for minor Mössbauer species fits and details.

Attempts to obtain the rR spectrum were unsuccessful for (DCHIm)F₈Cmpd-II(LutH⁺).

Pre-edge area (standard deviations for the fits).