S1 Original Transition Metal→Indium Interactions upon Coordination of a Triphosphine-Indane Eric J. Derrah, Marie Sircoglou, Maxime Mercy, Sonia Ladeira, Ghenwa Bouhadir,* Karinne Miqueu,* Laurent Maron,* and Didier Bourissou* SUPPLEMENTARY INFORMATION Contents Experimental details and spectroscopic data S2 Crystallographic data S4 Computational details S5 Theoretical results S6