Comment on 'new infrared spectra and tautomeric studies of purine and alpha L-alanine with an innovative sampling technique.'.
IR spectra claimed [Spectrochim. Acta A 55 (1999) 2329] to be those of NH2CHMeCO2H and N(7)H purine, as isolated molecules in KBr. are those of cationic species formed in the acid media used.
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John Curtin School of Medical Research, Australian National University, Canberra, ACT.
D000409:Alanine / Q000032:analysis*; D011687:Purines / Q000032:analysis*; D013055:Spectrophotometry, Infrared / Q000379:methods
D011687:Purines; D000409:Alanine; C030985:purine