Organic Solutes in Aqueous Solutions

B71

B73

Pyridazine (1,2-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 = (5.0 ± 0.3) x 109 dm3mol-1s-1  

KIE = kM / kH = 5 x 109 / 2.7 x 108 = 18.5

kH = 2.7 x 108 dm3mol-1s-1 at pH ~ 1 (~ 99 %  solute have one of their N atoms

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

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