| Autor: |
Mikhail N. Bochkarev, Alexander F. Shestakov, Nina S. Emel’yanova, Yuri T. Struchkov, Alexander A. Trifonov, Lev N. Zakharov |
| Rok vydání: |
1997 |
| Předmět: |
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| Zdroj: |
Journal of Organometallic Chemistry. 540:1-6 |
| ISSN: |
0022-328X |
| DOI: |
10.1016/s0022-328x(97)00103-4 |
| Popis: |
The diphenylbutadiene-bridged gadolinium complex [GdCl2(THF)3]2(μ-Ph2C4H4) · 3THF (1) has been obtained by the reaction of Gd(III) chloride with diphenylbutadienepotassium. The molecular structure of 1 was determined by X-ray diffraction. The complex 1 has a binuclear structure in which a bridging diphenylbutadiene ligand is η4-bonded to the Gd atoms connecting two GdCl2(THF)3 units. Both Gd atoms have a distorted octahedral environment. At the Gd atom the two Cl atoms are in trans positions and the four other coordination sites are occupied by the three O atoms of THF molecules and the η4-bonded C4H4 fragment of a diphenylbutadiene ligand. In the two η4-bonded GdC4H4 fragments one of the Gd-C η4-distances is significantly elongated (2.86(3) and 2.97(3) A) compared with other three (2.65(3)–2.69(3) and 2.67(3)—2.77(3) A). The magnetic moment of Gd, equal to 8.1 BM, is typical for Gd3+ compounds that is evidence for a formal charge of DPBD ligand of −2 in complex 1. However, the expected distribution of the C-C bond of the diene fragment as long—short—long is not realized. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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