Über Pterinchemie. 64. Mitteilung. Die Kristallstruktur von 6-Methyl-7,8-dihydropterin-monohydrochlorid-monohydrat

The crystal structure of 6-methyl-7,8-dihydropterine-monohydrochloride-monohydrate The crystal structure of the title compound has been determined by X-ray analysis (direct methods) and refined with 990 structure amplitudes to R = 0.025. The crystal system is triclinic, space group P1, with unit cell dimensions a = 5.859, b = 7.686, c = 12.107, α = 71.84, β = 76.35, γ = 85.80. The molecule is protonated at the N(5)-position and is planar. The atoms H(19) and H(20) are with 0.818 A above respectively with −0.705 A under the plane.