| Autor: |
Cole, Marcus L., Deacon, Glen B., Junk, Peter C., Proctor, Kathryn M., Scott, Janet L., Strauss, Christopher R. |
| Zdroj: |
European Journal of Inorganic Chemistry; October 2005, Vol. 2005 Issue: 20 p4138-4144, 7p |
| Abstrakt: |
Direct treatment of excess lanthanum, europium or ytterbium metal with 2,6-dibenzylphenol (HOdbp) at 150 °C afforded [La2(Odbp)6], [Eu2(Odbp)4] and [Yb(Odbp)2]n, respectively, in high yields. Alternatively, treatment of Yb metal with excess HOdbp gave an ytterbium(III) species [Yb2(Odbp)6], similar to the lanthanum analogue. X-ray crystal structures were obtained for [La2(Odbp)6], [Eu2(Odbp)4] and [Yb2(Odbp)6]. [La2(Odbp)6] and [Yb2(Odbp)6] are pseudo-centrosymmetric dimers with two terminal and four bridging Odbp– ligands and [Eu2(Odbp)4] crystallizes as a centrosymmetric dimer with further organization in a polymeric form through supramolecular interactions. All three structurally characterized compounds achieve coordination saturation by Ln–π-arene interactions. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005) |
| Databáze: |
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