Abstract
1H NMR and 2H NMR resonance of a series of oxo-centred trinuclear chromium complexes of the form [Cr 3O(O 2CR) 6(L) 3] + (R = —CH 3, —CH 2CH 3, —Ph, -4-MePh; L = H 2O, py, 2-Mepy, 3-Mepy, 4-Mepy) have been observed and assigned. The role of π- and σ-bonding frameworks in the delocalization of unpaired electron density onto the ligand protons is examined. The π-delocalization mechanism dominates where ligands contain aromatic substituents or carboxylate functionalities, consistent with the presence of a metal centre where unpaired electrons reside solely in t 2g orbitals. A comparison of the importance of these mechanisms with that in trinuclear manganese and iron complexes is reported. These results suggest that 1H and 2H NMR studies could be useful probes of proteins containing coupled multinuclear chromium assemblies.
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 callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
