. Author manuscript; available in PMC: 2013 May 2.

Published in final edited form as: J Am Chem Soc. 2012 Apr 23;134(17):7367–7377. doi: 10.1021/ja211247f

Table 2.

IVCT analysis for [1^R1,R2]⁺ and [2^R1,R2]⁺.

complex	ν_max (cm⁻¹)^a	ε (M⁻¹cm⁻¹)^a	Δν_1/2 (cm⁻¹)^a	Δν_HTL (cm⁻¹)^b	H_AB (cm⁻¹)^c
[1^tBu2]⁺	5700	2900	5600	3600	2300
[1^tBu,OMe]⁺	8700	1400	5300	4500	1900
[1^OMe2]⁺	7800	1400	6200	4200	2000
[1^OMe,SiPr]⁺	9300	1200	6300	4600	2000
[1^SiPr2]⁺	10200	1300	6200	4900	2200
[1^tBu,SiPr]⁺	9300	1600	5800	4600	2200
[2^tBu2]⁺	6300	2000	6200	3800	2100
[2^tBu,OMe]⁺	9600	700	5400	4700	1500
[2^OMe2]⁺	8300	1000	6200	4400	1700
[2^OMe,SiPr]⁺	10500	900	5600	4900	1800
[2^SiPr2]⁺	11200	900	6400	5100	2000
[2^tBu,SiPr]⁺	10600	600	6900	4900	1600

Determined by multiple Gaussian fitting of the UV-Vis-NIR spectra.

From eq. 3.

From eq. 4.