Tetrameric Iridium Hydride-Rich Clusters Formed under Hydrogenation Conditions (pages 582–585)
Yingjian Xu, Mehmet A. Celik, Amber L. Thompson, Hairong Cai, Mine Yurtsever, Barbara Odell, Jennifer C. Green, D. Michael P. Mingos and John M. Brown
Version of Record online: 9 DEC 2008 | DOI: 10.1002/anie.200804484
Butterfly clusters: Hydrogenation of a cationic iridium complex with the sterically bulky N-ligand tetrahydroquinoline (thq) leads to the formation of two distinct tetrameric polyhydrides (see scheme; Ir green, N blue, P purple), which differ by exchanging one thq ligand for hydride. Both complexes have butterfly structures, with similar core geometries, but markedly different hinge angles (40.8° for 1 and 9.1° for 2).