Table 1. Bond Lengths of the Ru Coordination Environment for the Dark-State and Light-Induced Crystal Structures of 1.

bond	bond length (dark), Å	bond length (light), Å
Ru1–N1(ammine)	2.168(3)	2.119(6)
Ru1–N2(ammine)	2.197(3)	2.125(6)
Ru1–N3(ammine)	2.182(3)	2.129(6)
Ru1–N4(ammine)	2.195(3)	2.118(6)
Ru1–N5(3-Brpyridyl)	2.042(3)	2.075(6)
Ru1–S1/O1(SO2)	2.0344(9)	2.063(5)