Table 2. Identified electronic transitions in 1–6.

Compound	Transition no.	Energy, cm-1	Absorption intensity	MCD
1	1	38,000	w	-(vw)
	2	42,000	w	+(w)
	3	46,100	m	-(m)
	4	49,000	s	-(s)
2	1	40,700	w	+(w)
	2	43,000	w	+(m)
	3	46,300	s	-(m)
3	1	42,000	w	+(w)
	2	43,700	w	+(m)
	3	47,600	s	-(m)
4	1	43,000	m	+(w)
	2	44,600	w	+(w)
	3	48,000	s	-(m)
5	1	41,200	—	-(w)
	2	42,200	s	+(w)
6	1	41,500	—	-(w)
	2	42,400	s	+(w)

W, weak; m, medium; s, strong; vw, very weak.