▁Ber th el ot ▁reduced ▁ben z ene ▁with ▁hydro iod ic ▁acid ▁at ▁elev ated ▁temper atures . ▁ ▁In ▁ 1 8 7 0 , ▁Adolf ▁von ▁Ba ey er ▁repeated ▁the ▁reaction ▁and ▁pron ounced ▁the ▁same ▁reaction ▁product ▁" hex ah ydro ben z ene " ▁ ▁in ▁ 1 8 9 0 ▁Vladimir ▁Mark ov nik ov ▁believed ▁he ▁was ▁able ▁to ▁dist ill ▁the ▁same ▁comp ound ▁from ▁C au cas us ▁pet role um , ▁calling ▁his ▁con co ction ▁" hex an ap ht ene ". ▁ ▁Sur pr ising ly , ▁their ▁cy clo hex anes ▁bo iled ▁higher ▁by ▁ 1 0   ° C ▁than ▁either ▁hex ah ydro ben z ene ▁or ▁hex an ap ht ene , ▁but ▁this ▁r iddle ▁was ▁solved ▁in ▁ 1 8 9 5 ▁by ▁Mark ov nik ov , ▁N . M . ▁K ish ner , ▁and ▁Nikol ay ▁Z elin sky ▁when ▁they ▁re ass igned ▁" hex ah ydro ben z ene " ▁and ▁" hex an ap ht ene " ▁as ▁m eth yl cyc lop ent ane , ▁the ▁result ▁of ▁an ▁unexpected ▁re arr ang ement ▁reaction . ▁ ▁Success ▁In ▁ 1 8 9 4 , ▁Ba ey er ▁synth es ized ▁cy clo hex ane ▁starting ▁with ▁a ▁k eton ization ▁of ▁p im el ic ▁acid ▁followed ▁by ▁multiple ▁redu ctions : ▁ ▁In ▁the ▁same ▁year , ▁E . ▁Haw orth ▁and ▁W .