The =C chemical shifts of a series of isoflavones having hydroxy, acetoxy, methoxy and methylenedioxy substituents are compared. Some general relationships between substitution patterns and chemical shifts, useful for the identitication of naturally occurring isoflavones, are outlined.
Carbon-13 nuclear magnetic resonance spectra of model hydroaromatic hydrocarbons and solvent
✍ Scribed by Kalkunte S. Seshadri; Raffaele G. Ruberto; Douglas M. Jewell; Huey P. Malone
- Publisher
- Elsevier Science
- Year
- 1978
- Tongue
- English
- Weight
- 757 KB
- Volume
- 57
- Category
- Article
- ISSN
- 0016-2361
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✦ Synopsis
Carbon-13 chemical shifts are reported for tetralin, hydrophenanthrenes and hydropyrenes and their alkyl substituted derivatives.
Mono-and di-plus tri-aromatic fractions of hydrogenated phenanthrene and pyrene were also examined by carbon-13 n.m.r. and, wherever possible, the components in them identified.
* Quaternary carbons in a structure are those with no hydrogen atoms attached to them
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