Unexpected chelation interaction for 2-hydroxy-2-(1-oxy-pyridin-2-yl)-N,N-diphenyl acetamide with La(III)

Sylvie Pailloux, Iris Binyamin, Lorraine M. Deck, Benjamin P. Hay, Eileen N. Duesler, Lev N. Zakharov, W. Scott Kassel, Arnold L. Rheingold, Robert T. Paine

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


The lanthanide coordination chemistry of the new ligand 2-hydroxy-2-(1-oxy-pyridin-2-yl)-N,N-diphenyl acetamide (5) has been examined. X-ray crystal structure determinations for the free ligand 5 and for one complex, [La(5)6] (NO3)3·7H2O, have been completed and the latter reveals an unexpected bidentate chelation mode for 5 that involves the amide carbonyl oxygen atom and the 2-hydroxy oxygen atom of each ligand. The six bidentate ligands generate an icosohedral inner coordination sphere. The N-oxide oxygen atom of each ligand also hydrogen bonds with a 2-hydroxyl hydrogen atom in a neighboring ligand molecule in the same molecular unit.

Original languageEnglish (US)
Pages (from-to)3979-3984
Number of pages6
Issue number18
StatePublished - Dec 8 2009

Bibliographical note

Funding Information:
Acknowledgement is made to the US Department of Energy (DOE), Chemical Sciences, Geosciences and Biosciences Office, Office of Basic Energy Sciences (Grant DE-FG02-03ER15419 ) for financial support at UNM (RTP) and (Grant DE-AC05-00OR22725 ) for financial support at Oak Ridge National Laboratory managed by UT-Battelle, LLC (BPH). We also acknowledge the contributions of Dr. S.-J. Kim to the early phase of this study.


  • 2-(1-Oxypyridin-2-yl) acetamide ligand
  • Hexakis-bidentate chelate
  • La(III) complex

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