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Comment on the Estimation of the Dimerisation Constant of Caffeine

✍ Scribed by Helmut Stamm; Friedrich Timeus

Publisher: John Wiley and Sons
Year: 1984
Tongue: German
Weight: 152 KB
Volume: 67
Category: Article
ISSN: 0018-019X
DOI: 10.1002/hlca.19840670816

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✦ Synopsis

Abstract

Reasons for the low reliability of the Compare e.g. former results cited in [3][4] with our results in [3].

H‐NMR estimation of the dimerisation constant of caffeine in D~2~O are discussed. The main reasons are (1) strong influence of small variations in the monomer shifts δ~0~ which are to be determined by extrapolation, and (2) disturbance by the formation of higher oligomers. The dilemma ist that attempts to minimize errors from (1) increase the influence of (2) and vice versa.

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