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Basicity of pyrazine

The 1,2,5-thiadiazole nucleus is extremely weakly basic and exhibits an ultraviolet spectrum in concentrated hydrochloric acid identical to that in water. A bathochromic shift of 9 m a in the spectrum taken in 96 % sulfuric acid indicates some protonation of the ring in that solvent. 1,2,5-Thiadiazole is a much weaker base than pyrazine (piTa 0.6) and probably has a pAa well below zero. The very low basicity of pyrazine was explained by Albert et ai. as being related to the... [Pg.130]

See other pages where Basicity of pyrazine is mentioned: [Pg.302]    [Pg.236]    [Pg.302]    [Pg.3756]   
See also in sourсe #XX -- [ Pg.1173 ]

See also in sourсe #XX -- [ Pg.1173 ]



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