Metall-π-Komplexe von Benzolderivaten, 36. Zur Kenntnis der Struktur von μ(η6:η6-Biphenyl)bis[(η6-benzol)metall]-Komplexen in starrer Lösung und im Kristall
✍ Scribed by Elschenbroich, Christoph ;Heck, Jürgen ;Massa, Werner ;Birkhahn, Matthias
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1990
- Tongue
- English
- Weight
- 338 KB
- Volume
- 123
- Category
- Article
- ISSN
- 0009-2940
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✦ Synopsis
Metal π‐Complexes of Benzene Derivatives, 36. — The Structure of μ(η^6^:η^6^‐Biphenyl)bis[(η^6^‐benzene)metal] Complexes in Rigid Solution and in the Crystalline State
For μ(η^6^:η^6^‐C~6~H~5~C~6~H~5~)[η^6^‐C~6~H~6~)Cr]~2~ (2) an antiperiplanar conformation has been established by means of X‐ray diffraction. Two (C~6~H~6~)Cr units coordinate to planar bridging biphenyl. This configuration differs from that of the diradical dication 2^d⊕ d⊕^ in rigid solution. According to the zero‐field splitting parameter D in the EPR spectrum, 2^d⊕ d⊕^ adopts a synclinal conformation, the half‐sandwich fragments coordinating to twisted biphenyl (dihedral angle α ≈︁ 60°).