Pyridine-2-olato bridged dirhodium(III) acyl organometallics: Synthesis, spectroscopic, structural and theoretical studies
Year: 2024
Type: article
Abstract: The heterogeneous phase reaction of [Rh( Me L sb )(PPh 3 ) 2 Cl 2 ] ( 1 ) with the sodium salt of three different pyridine-2-olato ligands [Na(R‒Opy), R = H , Me, NO 2 ] in dichloromethane–acetone–water medium afforded the complexes of type [Rh(L al )(PPh 3 )(R-Opy)] 2 ( 2 (R)) in excellent yield. These are the first examples of dirhodium(III) acyl complexes with the bridging pyridine-2-olato ligand. The penta coordinated dirhodium(III) acyl complexes are formed by the cleavage of the Rh Cl and Rh PPh 3 bonds of the precursor complex 1 . The two R-Opy ligands bridge the two rhodium centers through their O Opy donor centers. The conversion of 1 → 2 (R) is attended with the concomitant hydrolysis of the aldiminium function in 1 . The spectral (UV–vis, IR, NMR) data of the complexes are reported. The identity of 2 (Me) has been established by single crystal X–ray structure determination which revealed distorted trigonal bipyramidal RhCNO 2 P coordination sphere. The Rh, C, N and O phenolato atoms define the equatorial plane whereas Rh, O Opy and P atoms define the axial plane. The electronic structures and absorption spectra of the complexes are also scrutinized by the density functional theory (DFT) and time–dependent DFT calculations.
Source: Journal of Molecular Structure
Authors: Anikul Islam, Jagannath Chowdhury, Arijit Mondal, Swarup Chattopadhyay
Institution: University of Kalyani
Language: English
Subfield: Organic Chemistry
Field: Chemistry
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,570
OpenAlex ID: W4402533171