Flanders, David John (1985) Structural studies of actinide compounds. PhD thesis, University of Warwick.

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Abstract

The work described in this thesis was an investigation into the coordination chemistry of uranium(VI) and neptunium(VI). Structural determinations of comparable uranium and neptunium compounds were used to examine the actinide contraction between uranium and neptunium, the changes in metal-ligand bond length on substituting nitrogen for oxygen as the donor atom and to establish the mode of coordination of certain ligands around the actinyl(VI) ion.

These areas have been explored through the determination of the crystal structures of the following compounds:-
a) The 2,2'-dipyridyl complexes [CO2(NO3),C10H8N2], [NpO2(N [UOa(CH3COO)2Cl0H8N2] and [NpO2a(CH3COO)2C10H8N2].
b) The 1,10-phenanthroline complex [C02(NC3)2C12H8N2].
c) The pentan-2,4-dionate complexes [CO2(CH3COCHCOCH3)aC5H5N],
[NpOa(CH3COCHCOCH3)2C 5HsN],
[UO2(CH3COCHCOCH3)a.HaO] and
[U0aCH3C0CHC0CH3)2H2C[UO2CH3COCHCOCH3(NO3)2 [(CH3)3C5H3N]*
d) The 4,4'-dipyridyl compound [(UO2(NO3)2OH2] [C10H10N2]2*

In addition the structure determination of the compound bis(nitrato)dioxo tetrakis(glycinato)uranium(VI) showed that the glycine ligands are coordinated via the oxygen atoms with two bidentate and two monodentate glycines. Other structures which have been determined are the mixed oxidation state neptunium alkali metal salt [CsTNp( v,Oa(Np( w|Oa)aClia], the organoneptunium(IV) compound
[(CsHs)CI3Np(OPPh3)a] and the photo-oxidation product [L'OjfCCIjCOOICMOPPhj),]

There is also an uncompleted structure of a 1,10-phenanthroline complex with uranyl(VI)acetate which is described as far as possible.

Item Type:	Thesis or Dissertation (PhD)
Subjects:	Q Science > QD Chemistry
Library of Congress Subject Headings (LCSH):	Actinium compounds
Official Date:	March 1985
Dates:	Date Event March 1985 UNSPECIFIED
Institution:	University of Warwick
Theses Department:	Department of Chemistry
Thesis Type:	PhD
Publication Status:	Unpublished
Supervisor(s)/Advisor:	Alcock, N. W. (Nathaniel Warren)
Sponsors:	Science and Engineering Research Council (Great Britain); Atomic Energy Research Establishment (Harwell, England)
Format of File:	pdf
Extent:	[7], 150 leaves : illustrations
Language:	eng

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