Reduction of sterically hindered β-diketiminato europium(III) complexes by the β-diketiminato anion: a convenient route for the synthesis of β-diketiminato europium(II) complexes

Dalton Transactions : an International Journal of Inorganic Chemistry
Xiaodong ShenQi Shen

Abstract

The metathesis reaction of anhydrous EuCl(3) with sodium salt of bulky β-diketiminato NaL (L = [N(2, 4, 6- Me(3)C(6)H(2))C(Me)](2)CH(-), L(2, 4, 6-Me3); [N(2,6-(i)Pr(2)C(6)H(3))C(Me)](2)CH(-), L(2, 6-ipr2) and [(2, 6-(i)Pr(2)C(6)H(3))NC(Me)CHC(Me)N(C(6)H(5))](-), L(2, 6-ipr2)(Ph)) in THF at 60 °C afforded the corresponding Eu(II) complexes: Eu(II)(L(2, 4, 6-Me3))(2)(THF) (1), Eu(II)(L(2, 6-ipr2))(2) (2) and Eu(II)(L(2, 6-ipr2)(Ph))(2) (5) with the formations of dimers (L(2, 4, 6-Me3))(2) (3) and (L(2, 6-ipr2))(2) (4) for the former two reactions and proligand L(2, 6-ipr2)(Ph)H (6) for the latter one. Compounds 1-6 were confirmed by an X-ray crystal structure analysis. The central metal Eu(II) in 1 is coordinated by two monoanionic L(2, 4, 6-Me3) ligands and one THF molecule in a trigonal bipyramid. The Eu(II) in each of 2 and 5 is ligated by two monoanionic ligands to form a tetrahedral geometry. The BVS (Bond Valence Sum) calculation indicates the oxidation state of Eu in all the three complexes is 2+ (2.12 for 1, 1.86 for 2 and 1.99 for 5). The isolation of dimers of (L(2, 4, 6-Me3))(2) and L(2, 6-ipr2))(2) and proligand L(2, 6-ipr2)(Ph)H demonstrates that the reducing agent in the present reduction of a Eu(III) ion to a Eu(I...Continue Reading

References

Mar 7, 2002·Journal of the American Chemical Society·Paul G HayesRobert McDonald
Jun 13, 2002·Chemical Reviews·William J Evans, Benjamin L Davis
Sep 12, 2002·Chemical Reviews·Laurence Bourget-MerleJohn R Severn
May 8, 2003·Journal of the American Chemical Society·Paul G HayesMasood Parvez
Jul 28, 2004·Dalton Transactions : an International Journal of Inorganic Chemistry·Anthony G AventAndrey V Protchenko
Feb 9, 2005·Chemical Communications : Chem Comm·Peter B HitchcockAndrey V Protchenko
Sep 25, 2008·Dalton Transactions : an International Journal of Inorganic Chemistry·Xuehong WeiMichael F Lappert

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Citations

Jun 30, 2016·Dalton Transactions : an International Journal of Inorganic Chemistry·Clément Camp, John Arnold
Nov 4, 2015·Dalton Transactions : an International Journal of Inorganic Chemistry·Mingqiang XueQi Shen
Oct 12, 2018·Dalton Transactions : an International Journal of Inorganic Chemistry·Zehuai MouDongmei Cui
Jul 3, 2020·Inorganic Chemistry·Christopher M KotykLinda H Doerrer

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