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High-resolution 13C NMR studies of solid 1,4-bis(n-butylamino)anthraquinone

✍ Scribed by R. K. Harris; P. Jonsen; K. J. Packer

Publisher: John Wiley and Sons
Year: 1984
Tongue: English
Weight: 427 KB
Volume: 22
Category: Article
ISSN: 0749-1581
DOI: 10.1002/mrc.1270221211

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✦ Synopsis

High-resolution 13C NMR spectra of solid ~4-bis(n-butylamioo)aothraguinone are presented. In spectra measured at 22.6 M H z the effects of two short-range and two long-range residual ("C, ' " N , diplar couplings have been observed. Only the short-range effects are observable in the 50.3-spectra. These typical asymmetric doublets allow the determination of the " N nuclear quadruple coupling eonstant ( ~= k Q q / h = -3 . 0 M H z ) , the asymmetry parameter (-q=O.3) and the orientation of the electric field gradient tensor of the '*N in the molecular framework.

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