Summary
NMR spectral studies on the HCN oligomers suggest the presence of carboxamide and urea groupings. The release of CO2, H2O, HCN, CH3CN, HCONH2 and pyridine on pyrolysis is consistent with the presence of these groupings as well as carboxylic acid groups. No basic primary amine groupings could be detected with fluorescamine. Hydrazinolysis of the HCN oligomers releases 10% of the amino acids normally released by acid hydrolysis. The oligomers give a positive biuret test but this is not due to the presence of peptide bonds. There is no conclusive evidence for the presence of peptide bonds in the HCN oligomers. No diglycine was detected on partial hydrolysis of the HCN oligomers at pH 8.5 suggesting that HCN oligomers were not a source of prebiotic peptides.
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Chemical Evolution 38. For the previous papers see Ferris JP, Rao RV, Newton TA (1979). J Org Chem 44:4378–4381, 4381–4385; Ferris JP, Edelson EH, Mount NM, Sullivan AE (1979) J Mol Evol 13:317–330
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Ferris, J.P., Edelson, E.H., Auyeung, J.M. et al. Structural studies on HCN oligomers. J Mol Evol 17, 69–77 (1981). https://doi.org/10.1007/BF01732676
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DOI: https://doi.org/10.1007/BF01732676