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  Stereodynamics and characterization of the hexa(4-n-dodecylbiphenylyl)benzene hexaanion that includes a twisted benzene core

Eshdat, L., Hoffman, R. E., Fechtenkötter, A., Müllen, K., & Rabinovitz, M. (2003). Stereodynamics and characterization of the hexa(4-n-dodecylbiphenylyl)benzene hexaanion that includes a twisted benzene core. Chemistry-A European Journal, 9(8), 1844-1851.

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 Creators:
Eshdat, L., Author
Hoffman, R. E., Author
Fechtenkötter, Andreas1, Author           
Müllen, Klaus1, Author           
Rabinovitz, M., Author
Affiliations:
1MPI for Polymer Research, Max Planck Society, ou_1309545              

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Free keywords: alkali metals; carbanions; molecular dynamics; NMR spectroscopy; structure elucidation
 Abstract: Hexa(4-n-dodecylbiphenylyl)benzene (HDBB) was reduced by a series of alkali metals in THF under high vacuum. Three reduction states were identified by NMR spectroscopy, namely the dianion, tetraanion and hexaanion. The NMR spectra of HDBB6- revealed a remarkable distortion of symmetry, which is interpreted by adoption of a twisted conformation of the central benzene ring and a slow rotation of the inner phenylene rings of the biphenyl units. Due to the surprising thermal stability of the hexaanion, a dynamic NMR investigation revealed the pseudorotation of the twisted conformation and the phenylene rotation mentioned above.

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Language(s): eng - English
 Dates: 2003-04-14
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: eDoc: 28352
ISI: 000182381600020
Other: P-03-154
 Degree: -

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Title: Chemistry-A European Journal
  Alternative Title : Chem.-Eur. J.
Source Genre: Journal
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Publ. Info: -
Pages: - Volume / Issue: 9 (8) Sequence Number: - Start / End Page: 1844 - 1851 Identifier: ISSN: 0947-6539