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Synthesis and Characterisation of Lanthanide(II) Aryloxides including the First Structurally Characterised Europium(II) Compound *thf (thf = tetrahydrofuran)

DOI: 10.1039/DT9950001427

Source and publish data:

Journal of the Chemical Society, Dalton Transactions p. 1427 - 1434 (1995)

Update date:2022-08-05

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Authors:

Hende, Johannes R. van denHende, Johannes R. van den

Hitchcock, Peter B.Hitchcock, Peter B.

Holmes, Stephen A.Holmes, Stephen A.

Lappert, Micheal F.Lappert, Micheal F.

Leung, Wing-PorLeung, Wing-Por

et al.et al.

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Article abstract of DOI:10.1039/DT9950001427

The lanthanide(II) aryloxide complexes 1, 2, 3, 4, *thf 5, 6 and 7 (thf = tetrahydrofuran) have been synthesized.Each of the complexes 1-3 was prepared by the reaction of 2 equivalents of the appropriate potassium aryloxide with YbI2 in diethyl ether (1) or thf (2 or 3).Complexes 4-6 were prepared by the reaction of 2 equivalents of K(OC6H2Bu-t2-2,6-Me-4) with LnI2(thf)2 (Ln = Sm, Eu or Yb) in thf.Reacting YbI2 with 1 equivalent of K(OC6H2Bu-t2-2,6-Me-4) in thf yielded complex 7 as the main product, but 171Yb-<1H> NMR spectroscopy showed that 6 and 8 were also formed.The crystal structure of complex 5 reveals that it adopts a distorted trigonal-bipyramidal conformation with (i) apical thf oxygens ; (ii) the equatorial O(1), O(2) and O(3) thf coplanar; and (iii) Eu-O(1) 2.321(5), Eu-O(2) 2.337(5) and Eu-O(3) 2.515(6) Angstroem.The crystal structure of complex 8 showed there to be an octahedral arrangement around the metal, the molecule lying an a crystallographic inversion centre, with angles I-Yb-O(1) 90.1(2), I-Yb-O(2) 91.4(2) and O(1)-Yb-O(2) 88.9(3) deg, and bond lengths Yb-I 3.103(1), Yb-O(1) 2.399(9) and Yb-O(2) 2.373(8) Angstroem.

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Product name:[Eu(OC6H2(t-Bu2-2,6-Me-4)2)(tetrahydrofuran)3] * tetrahydrofuran

Cas No:166943-05-1

166943-05-1

R&D Labs maybe for 166943-05-1

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