Rhodium(I) dimethyl sulfoxide oxyquinolinato carbonyl complex, [Rh(Oxq)(CO)(DMSO)]. NMR and X-ray structure data

• New complex, [Rh(Oxq)(CO)(DMSO)], contains S-coordinated DMSO in trans-N position.
• DMSO in its net donating potency is close to tertiary phosphites and olefins.
• Long-range spin couplings 13C to 103Rh reflect interactions between remote ligands.

A new rhodium(I) dimethyl sulfoxide (DMSO) 8-oxyquinolinato (Oxq) complex, [Rh(Oxq)(CO)(DMSO)] (I), has been prepared and characterized by IR, 1H and 13C NMR, and X-ray data. DMSO is S-coordinated in the trans-N position. The values of ν(CO), carbonyl δ13С, as well as δ13С and δ1H of Oxq ligand for three L trans-N complexes, [RhOxq(CO)(L)] (L = NH3, DMSO, and CO), define the intermediate position of DMSO within the ligand L series ranged in their net donating potency. Observed spin–spin couplings of Oxq 13C (C2, C3, C4a, C7, C8a) and 1H (H2) nuclei to 103Rh provide one more tool to study long-range interactions of Oxq rings with metallocenter and remote ligand L.

A new rhodium(I) dimethyl sulfoxide 8-oxyquinolinato carbonyl complex is prepared and characterized by IR, 1H and 13C NMR, and X-ray data. Long-range ligand interactions are discussed.Figure optionsDownload as PowerPoint slide