Abstract
The solution structure and dynamics and the relaxation properties of the lanthanide(III) complexes with ethylenebis(oxyethylenenitrilo)tetraacetic acid (EGTA) are studied by NMR techniques. The longitudinal water proton relaxation rates as a function of the magnetic field in a solution of Gd(EGTA) − are investigated and analysed. The experimental results are compared with existing data for other linear and macrocyclic complexes and interpreted as indicative of the presence of a single coordinated water molecule and of an unusual symmetry and stereochemical rigidity of the coordination cage. Variable temperature high resolution 1H and 13C NMR spectra for the Eu(III), Ho(III) and Yb(III) complexes confirm the above hypothesis and suggest a dodecahedral geometry for the complexes as well as a marked increase of rigidity along the lanthanide series.
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.
