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Influence de l'imidazole, de quelques sels métalliques et de mélanges imidazole/sel métallique sur des réactions de condensation «prébiotiques» induites par les polyphosphates en milieu aqueux
Author(s) -
Rabinowitz Joseph,
Hampai Aioub
Publication year - 1979
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.19790620319
Subject(s) - chemistry , imidazole , aqueous solution , condensation , salt (chemistry) , yield (engineering) , nuclear chemistry , metal , medicinal chemistry , polymer chemistry , organic chemistry , physics , materials science , metallurgy , thermodynamics
Influence of imidazole, metal salts and mixtures of imidazole/metal salt on ‘prebiotic’ condensation reactions induced by polyphosphates in aqueous solutions In the presence of imidazole, aqueous solutions 0.1 M in glycine and 0.1 M in sodium trimetaphosphate, at pH 8.0–8.6 and room temperature, yield after 14 days up to 3% of triglycine. Addition of Cd 2+ or Zn 2+ decreases the yields, while Mg 2+ increases them slightly. The significance of the systems trimetaphosphate/imidazole and trimetaphosphate/imidazole/magnesium salt in the promotion of ‘prebiotic’ condensation reactions in aqueous solutions, especially the condensation of amino acids, is discussed.