Synthesis and crystal structure of uranium(IV) complexes with compartmental Schiff bases: from mononuclear species to tri- and tetranuclear clusters

Dalton Transactions : an International Journal of Inorganic Chemistry
Lionel SalmonMichel Ephritikhine

Abstract

Treatment of U(acac)4 with the hexadentate Schiff base H2L(i) gave the [UL(i)2] complexes 1-4 [H2L1=N,N'-bis(3-methoxysalicylidene)-2-methyl-1,2-propanediamine, H2L2=N,N'-bis(3-methoxysalicylidene)-1,2-phenylenediamine, H2L3=N,N'-bis(3-methoxysalicylidene)-2-aminobenzylamine and H2L4=N,N'-bis(3-methoxysalicylidene)-2,2-dimethyl-1,3-propanediamine for 1-4, respectively]. The [U(L(i))(acac)2] compounds could not be isolated because of their ready disproportionation into [UL(i)2] and U(acac)4. Compounds 2 and 4 adopt a meridional configuration in the solid state and in solution, while exists in solution as the two equilibrating meridional and sandwich isomers and crystallizes in the meridional isomeric form. Reaction of U(acac)4 with H4L5 afforded the expected compound [U(H2L5)(acac)2] (5) [H4L5=N,N'-bis(3-hydroxysalicylidene)-2-methyl-1,2-propanediamine] but, in the presence of H4L6 and H4L7, U(acac)4 was transformed in a serendipitous and reproducible manner into the tri- and tetranuclear U(IV) complexes [U3(L6)(HL6)2(acac)2] (6) and [U4(HL7)4(H2L7)2] (7) [H4L6=N,N'-bis(3-hydroxysalicylidene)-1,2-phenylenediamine and H4L7=N,N'-bis(3-hydroxysalicylidene)-2-aminobenzylamine]. The crystal structures of 6.3thf and 7.5thf show the as...Continue Reading

References

Feb 22, 2002·Chemistry : a European Journal·Thierry Le BorgneMichel Ephritikhine
May 31, 2002·Acta Crystallographica. Section B, Structural Science·Frank H Allen
Jun 13, 2002·Chemical Reviews·Jean-Claude G Bünzli, Claude Piguet
Jun 10, 2003·Acta Crystallographica. Section C, Crystal Structure Communications·Lionel SalmonMichel Ephritikhine
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Jan 1, 1997·Methods in Enzymology·Zbyszek Otwinowski, Wladek Minor

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Citations

Mar 4, 2010·Chemical Communications : Chem Comm·Polly L ArnoldJason B Love
Jan 13, 2016·Dalton Transactions : an International Journal of Inorganic Chemistry·Min RenLuis D Carlos
May 24, 2006·Dalton Transactions : an International Journal of Inorganic Chemistry·Michel Ephritikhine
May 22, 2008·Dalton Transactions : an International Journal of Inorganic Chemistry·Mohan S BhararaAnne E V Gorden
Jun 14, 2006·Dalton Transactions : an International Journal of Inorganic Chemistry·Lionel SalmonMichel Ephritikhine
Jan 19, 2020·International Journal of Molecular Sciences·Sokratis T TsantisSpyros P Perlepes
Dec 2, 2004·Dalton Transactions : an International Journal of Inorganic Chemistry·Lionel SalmonMichel Ephritikhine
Dec 21, 2011·Dalton Transactions : an International Journal of Inorganic Chemistry·Giuseppe M LombardoFrancesco Punzo
Sep 10, 2020·Chemistry : a European Journal·Thomas RadoskeThorsten Stumpf
Nov 18, 2020·Dalton Transactions : an International Journal of Inorganic Chemistry·Mohammad AzamSimelys Hernàndez
Nov 26, 2010·Journal of the American Chemical Society·Clément CampMarinella Mazzanti
May 27, 2015·Inorganic Chemistry·Clément CampMarinella Mazzanti
Oct 8, 2021·Chemical Communications : Chem Comm·Sukhen BalaRaju Mondal

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