aya . ▁About ▁ 7 . 0 5 ▁percent ▁of ▁the ▁municipality ▁is ▁for ested . ▁ ▁References ▁ ▁Category : C ities ▁and ▁towns ▁in ▁H oll ab run n ▁District <0x0A> </s> ▁ 2 - Py rid one ▁is ▁an ▁organ ic ▁comp ound ▁with ▁the ▁formula ▁. ▁ ▁It ▁is ▁a ▁colour less ▁solid . ▁It ▁is ▁well ▁known ▁to ▁form ▁hydro gen ▁bond ed ▁dim ers ▁and ▁it ▁is ▁also ▁a ▁classic ▁case ▁of ▁a ▁comp ound ▁that ▁exists ▁as ▁t autom ers . ▁ ▁Str ucture ▁ ▁The ▁am ide ▁group ▁can ▁be ▁involved ▁in ▁hydro gen ▁bond ing ▁to ▁other ▁nit ro gen - ▁and ▁o xygen - cont aining ▁species . ▁ ▁T aut omer ism ▁▁ ▁The ▁pro ton ▁attached ▁to ▁the ▁nit ro gen ▁can ▁also ▁move ▁to ▁the ▁o xygen ▁to ▁give ▁the ▁second ▁t aut omer ▁form , ▁ 2 - h ydro x yp y rid ine . ▁This ▁la ct am ▁la ct im ▁t aut omer ism ▁can ▁also ▁be ▁exhib ited ▁in ▁many ▁related ▁comp ounds . ▁ ▁T aut omer ism ▁in ▁the ▁solid ▁state ▁ ▁The ▁pre domin ant ▁solid ▁state ▁form ▁is ▁ 2 - py rid one . ▁This ▁has ▁been ▁confirmed ▁by ▁X - ray ▁cry stal log raph y ▁which ▁shows ▁that ▁the ▁hydro gen ▁in ▁solid ▁state ▁is ▁closer ▁to ▁the ▁nit ro gen ▁than ▁to ▁the ▁o xygen ▁( because ▁of ▁the ▁low ▁electron ▁density ▁at ▁the ▁hydro gen ▁the