title: Gel-assisted crystallization of [Ir4(IMe)7(CO)H10](2+) and [Ir4(IMe)8H9](3+) clusters derived from catalytic glycerol dehydrogenation.
abstract: The two title clusters were formed during iridium-catalyzed glycerol dehydrogenation and display a remarkably high NHC content. They were crystallized in either agarose or polyethylene oxide gel matrices, while more conventional crystallization techniques proved unsuccessful. Cluster [Ir4(IMe)8H9](3+), with a net charge of +3, was only crystallizable with a polyoxometalate Keggin trianion. The crystal packing of this intercluster compound is discussed. Computational studies position the iridium hydrides and provide insights into the bonding.
authors.affiliation: Yale University, 225 Prospect Street, New Haven, Connecticut 06520, USA. jesus.camposmanzano@yale.edu.
authors.forename: Liam S
authors.initials: LS
authors.lastname: Sharninghausen
authors.forename: Brandon Q
authors.initials: BQ
authors.lastname: Mercado
authors.forename: Robert H
authors.initials: RH
authors.lastname: Crabtree
authors.forename: David
authors.initials: D
authors.lastname: Balcells
authors.forename: Jesús
authors.initials: J
authors.lastname: Campos