The title compound, [Mn3(L)6(CH3OH) 2]n·0.5nH2O (1), where HL=3,5-dimethylbenzoic acid, was synthesized and its crystal structure was determined by X-ray diffraction structure analysis. The crystal is of triclinic, space group P1 with a=1.275 1(13) nm, b=1.354 6(14) nm, c=1.882 3(19) nm, α=110.826(1)°, β=94.358(2)°, γ=108.038(1)°, V=2.825 4(5) nm3, Z=1, Mr=2 265.77, Dc=1.332 g·cm-3, μ=0.723 mm-1, F(000)=1 180, R int=0.037, R=0.056 4, wR=0.128 5. In the crystal the manganese atom is six-coordinated by six oxygen atoms, completing an oct...