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

A new rhodium(I) dimethyl sulfoxide (DMSO) 8-oxyquinolinato (Oxq) complex, [Rh(Oxq)(CO)(DMSO)] ( I ), has been prepared and characterized by IR, 1 H and 13 C NMR, and X-ray data. DMSO is S-coordinated in the trans -N position. The values of ν(CO), carbonyl δ 13 С, as well as δ 13 С and δ 1 H of Oxq ligand for three L trans -N complexes, [RhOxq(CO)(L)] (L = NH 3 , 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 13 C (C2, C3, C4a, C7, C8a) and 1 H (H2) nuclei to 103 Rh provide one more tool to study long-range interactions of Oxq rings with metallocenter and remote ligand L.