Organic Solutes in Aqueous Solutions

B70

B72

Pyrazine (1,4-diazine)

Wu, Z., Stadlbauer, J.M. and Walker, D.C.
J. Am. Chem. Soc., 1992, 114, 3988.

Reaction: C4H4N2 + Mu ® MuC4H4N2

Type of reaction: addition to ring

kM = (7.7 ± 0.5) x 109 dm3mol-1s-1  

KIE = kM / kH = 7.7 x 109 / 3.0 x 108 = 25

kH = 3.0 x 108 dm3mol-1s-1 at pH ~ 1 (30 % of the solute have one of their N atoms protonated)


from:
www.rcdc.nd.edu/compilations/HAtom/H.htm

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