4f-5f heterotrimetallic complexes exhibiting electrochemical and magnetic communication

Eric J Schelter; Jacqueline M Veauthier; Joe D Thompson; Brian L Scott; Kevin D John; David E Morris; Jaqueline L Kiplinger

doi:10.1021/ja057808+

4f-5f heterotrimetallic complexes exhibiting electrochemical and magnetic communication

J Am Chem Soc. 2006 Feb 22;128(7):2198-9. doi: 10.1021/ja057808+.

Authors

Eric J Schelter¹, Jacqueline M Veauthier, Joe D Thompson, Brian L Scott, Kevin D John, David E Morris, Jaqueline L Kiplinger

Affiliation

¹ Chemistry and Materials Science & Technology Divisions, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.

PMID: 16478158
DOI: 10.1021/ja057808+

Abstract

Novel 4f-5f complexes of U(IV) and Th(IV) with Yb have been prepared using a terpyridyl-functionalized ketimide linking group. These 4f-5f heterotrimetallic complexes (C5Me5)2An[-N=C(CH2C6H5)(tpyYb(C5Me5)2)]2 (where An = Th, U) exist in Yb(II/III) valence equilibria and exhibit rich electrochemical behavior consistent with electronic coupling between the actinide and Yb(II/III)tpy*- moieties. The magnetic response of the uranium complex, studied qualitatively using a subtraction method, is indicative of a coupled magnetic state between the U(IV) and Yb(III)tpy*- groups at low temperatures. Both the electrochemical and magnetic data are in agreement and are consistent with differences in participation of the actinide valence orbitals in the ketimide bonding.