title: Sequestered plutonium: [Pu(IV){5LIO(Me-3,2-HOPO)}2]--the first structurally characterized plutonium hydroxypyridonate complex.
abstract: The first single-crystal X-ray diffraction analysis of a hydroxypyridonate plutonium(IV) complex is presented, that of the tetradentate ligand 5LIO(Me-3,2-HOPO) with Pu(IV). The [Pu(IV){5LIO(Me-3,2-HOPO)}(2)] complex crystallizes in the space group Pna2(1) with the asymmetric unit cell containing two unique eight-coordinate plutonium complexes and one perchlorate anion. According to shape measure analysis, the geometry of both Pu centers is closest to a bicapped trigonal prism (C(2v) symmetry, for Pu 1: S(C(2v))=13.48 degrees , S(D(4d))=15.43 degrees , S(D(4d))=16.10 degrees ). The average bond length for the Pu--O(phenolic) is 2.31(4) A, whereas the Pu--O(amide) distances are slightly longer, averaging 2.40(2) A. The preparative chemistry of this compound and the implications of the structure are discussed.
authors.affiliation: Glenn T. Seaborg Center, Chemical and Nuclear Sciences Divisions, Lawrence Berkeley, National Laboratory, and Department of Chemistry, University of California, Berkeley, CA 94720-1460, USA.
authors.forename: Anne E V
authors.initials: AE
authors.lastname: Gorden
authors.forename: David K
authors.initials: DK
authors.lastname: Shuh
authors.forename: Bryan E F
authors.initials: BE
authors.lastname: Tiedemann
authors.forename: Richard E
authors.initials: RE
authors.lastname: Wilson
authors.forename: Jide
authors.initials: J
authors.lastname: Xu
authors.forename: Kenneth N
authors.initials: KN
authors.lastname: Raymond