Abstract
In this article, we describe the synthesis of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) adducts of rhodium(II) carboxylate complexes, [Rh2(μ-O2CCR3)4(DBU)2] (R = H (1), Me (2)). The DBU ligand is coordinated to the axial site in both adducts via the imido-nitrogen atom, and single-crystal X-ray diffraction analysis of 1 and 2 revealed structurally similar attributes between the compounds. The Rh–Rh bond distance is 2.4108(3) Å for 1 and 2.4143(2) Å for 2. The Rh–N distance is 2.2681(3) Å for compound 1 and 2.2587(10) Å for compound 2. Compound 1, however, crystallized with solvent molecules in its unit cell, and Hirshfeld surface analysis showed intermolecular C–H···O interactions between oxygen atoms of [Rh2(μ-O2CCH3)4] and the hydrogen of the chloroform solvent among other intermolecular close-contact interactions. The crystal structure of compound 2 was found to be devoid of solvent and showed weak intramolecular C–H···O interactions from the DBU axial ligand to the oxygens of the bridging acetates. Otherwise, Hirshfeld analysis showed that 2 was dominated by H···H interactions. UV-vis spectroscopy of both adducts was also conducted in different solvents to examine shifts attributed to the π*(Rh2) to σ*(Rh2) band.
Highlights
Crystals 2021, 11, 517. https://Rhodium(II) paddlewheel complexes [(Rh(II)] are an exceptionally diverse group of bimetallic scaffolds
These compounds have primarily been employed in catalysis to facilitate carbene mediated reactions [1,2], though they have seen promising use in a variety of other applications such as potential anti-tumor drugs [3,4,5], sensors [6,7,8,9], and scaffolds for supramolecular assemblies [10,11,12]
Rh(II) complexes consist of four equatorial ligands that bridge the dirhodium core and two axial ligands that occupy the remaining coordination site on each rhodium atom (Figure 1)
Summary
Rhodium(II) paddlewheel complexes [(Rh(II)] are an exceptionally diverse group of bimetallic scaffolds These compounds have primarily been employed in catalysis to facilitate carbene mediated reactions [1,2], though they have seen promising use in a variety of other applications such as potential anti-tumor drugs [3,4,5], sensors [6,7,8,9], and scaffolds for supramolecular assemblies [10,11,12].
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
