μ-3,3'-Diisopropyl-1,1'-(propane-1,3-di-yl)bis-(1,3-diazinan-2-yl-idene)]bis-[bromido-(η(4)-cyclo-octa-1,5-diene)rhodium(I)

Gajanan Manohar Pawar; Klaus Wurst; Dongren Wang; Michael Buchmeiser

doi:10.1107/S1600536814001135

μ-3,3'-Diisopropyl-1,1'-(propane-1,3-di-yl)bis-(1,3-diazinan-2-yl-idene)]bis-[bromido-(η(4)-cyclo-octa-1,5-diene)rhodium(I)

Acta Crystallogr Sect E Struct Rep Online. 2014 Jan 31;70(Pt 2):m71-2. doi: 10.1107/S1600536814001135. eCollection 2014 Feb 1.

Authors

Gajanan Manohar Pawar¹, Klaus Wurst², Dongren Wang¹, Michael Buchmeiser¹

Affiliations

¹ Institut für Polymerchemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany.
² Institut für Allgemeine Anorganische und Theoretische Chemie, Universität Innsbruck, Innrain 80/82, 6020 Innsbruck, Austria.

Abstract

The title compound, [Rh2Br2(C8H12)2(C17H32N4)], was obtained by the reaction of 3,3'-(propane-1,3-di-yl)bis-(1-isopropyl-3,4,5,6-tetra-hydro-pyrimidin-1-ium) bromide and [{Rh(cod)Cl}2] (cod is cyclo-octa-1,5-diene) in tetra-hydro-furan. The two Rh(I) atoms each have a distorted square-planar coordination environment, defined by a bidentate cod ligand, a bromide anion and one C atom of the bridging bidentate bis-N-heterocyclcic carbene (NHC) ligand. The average Rh-CNHC distance is 2.038 (7) Å, suggesting that the bond has a major σ contribution with very little back donation. The distances between the cod ligands and the Rh(I) atoms vary between 2.104 (4) and 2.210 (4) Å.