Excitation characteristics of Os^a.

#	Energy/cm−1	Oscillator strength	Multiplicity	Major transitions
1	14 054		Triplet	H → L (98%)
2	14 470			H−2 → L (82%)	H–1 → L+1 (15%)
3	14 819			H → L+1 (96%)
4	15 613			H−2 → L (15%)	H–1 → L+1 (79%)
7	16 579			H → L+2 (30%)	H → L+3 (60%)
6	16 564	0.024	Singlet	H → L+1 (98%)
12	18 820	0.010		H−1 → L+1 (11%)	H → L+2 (81%)
17	20 940	0.242		H−2 → L (24%)	H–1 → L+1 (57%)	H → L+2 (16%)
18	21 219	0.044		H−1 → L+2 (92%)
21	21 466	0.039		H−2 → L+2 (99%)
23	21 778	0.044		H−2 → L+3 (98%)

^aCalculated using TD-DFT at the B3LYP/LanL2DZ (Os)/6-311++G(d,p) level of theory. The HOMO and LUMO are represented by H and L, respectively.