## Abstract The 1‐NH structure for 3‐azidoindazole has been demonstrated by the observation of ^1^H^1^H and ^13^C^1^H couplings involving the hydrogen atom attached to nitrogen. A comparison between 3‐azidoindazole and indazole shows that both compounds have the same tautomeric structure.
Method for reactivity ratio determination in high-conversion copolymerisations by means of 1H-n.m.r. spectroscopy
✍ Scribed by Natansohn, Almeric
- Book ID
- 104527013
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1978
- Tongue
- English
- Weight
- 245 KB
- Volume
- 10
- Category
- Article
- ISSN
- 0007-1641
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✦ Synopsis
Abstract
Copolymerisation of methyl methacrylate and styrene is carried out in the n.m.r. spectrometer's sample tube, measuring the comonomer concentration against time evolution. The data are processed according to the integrated Mayo‐Lewis and Fineman‐Ross equations in order to obtain the reactivity ratios values. The applicability, advantages and limits of the method are discussed.
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13G1 H heteronuclear dipolar dephasing n.m.r. techniques allow discrimination between different chemical species contributing to the 13C n.m.r. spectra of complex hydrocarbons. Model compound studies show significantly different effective transverse relaxation constants for carboxyl and quaternary c