13C Nuclear Magnetic Resonance Studies of Phenol-Formaldehyde Resins 1 - Model Compounds
β Scribed by Pethrick, Richard A. ;Thomson, Barry
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1986
- Tongue
- English
- Weight
- 837 KB
- Volume
- 18
- Category
- Article
- ISSN
- 0007-1641
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H and I3C N M R studies were carried out on l-ethenylnaphthalene, Zethenylnaphthalene, 9ethenylanthracene, 9ethenylphenanthrene, l-ethenylpyrene and l-ethenylperylene. Assignments of proton and carbon resonances were made with the aid of 2D COSY, 2D HETCOR, 2D COLOC, 2D COLOCS, 3J(H,C) INAPT, and NO
Analysis of 'H and 13C! spectra of l-'3C-acctyl&ne giver the same relative sign for JCH and -I&. Precise chemical shift valyes due to isotopic substitution are reported and compared with the earlier results. The chemical shift anisotropics (Ao) in acetylene and 1,2-13 C-acetylene arc found to be 22