Abstract
The crystal structure of 3,5-dimethylpyrazole with a chloranilic acid adduct crystallizes in a monoclinic space group, P21/c, with unit-cell parameters: a = 10.6747(1)Å, b = 9.4204(1)Å, c = 13.6237(2)Å, β = 108.2971(14)°, V = 1300.73(3)Å3, and Z = 4. The positions of the methyl groups in the pyrazole ring play significant roles in the H-bond network, and could not be involved in an out-of-plane motion in the proton transfer 1:1 ion pair adduct.
