Table 2.

Key ground state vibrational modes involved in the radiationless decay of the lowest-lying 2¹A_g^- state of the all-trans C₁₈ linear polyene.

v″	σf	sym	${\left|H_{v″}^{if}\langle 0|1\rangle \right|}^2$	${\left|H_{v″}^{if}\langle 0|2\rangle \right|}^2$
	cm-1	C2h	cm-2	cm-2
71	1649.3	bu	685.046	319.104
72	1655.1	bu	476.924	138.994
21	1633.8	ag	262.510	129.732
9	1124.0	ag	177.322	24.936
36	942.9	au	83.195	1.826
52	968.9	bg	57.727	3.559
8	1094.5	ag	46.316	31.891
31	432.3	au	41.721	7.635
29	222.0	au	30.481	8.098
32	649.6	au	29.233	5.054
69	1569.5	bu	26.545	13.369
44	237.5	bg	21.482	4.683
34	906.6	au	20.103	9.408
19	1547.8	ag	18.533	12.561
28	203.5	au	18.497	5.308
46	649.0	bg	16.792	2.725
$\text{∑}_{v″}{\left|H_{v″}^{if}\langle 0|k\rangle \right|}^2$ [above list]			2012.429	718.883