▁and ▁tw ist - bo at ▁are ▁energy ▁min ima ▁and ▁are ▁therefore ▁conform ers , ▁while ▁the ▁half - ch air ▁and ▁the ▁boat ▁are ▁transition ▁states ▁and ▁represent ▁energy ▁maxim a . ▁ ▁The ▁idea ▁that ▁the ▁chair ▁con formation ▁is ▁the ▁most ▁stable ▁structure ▁for ▁cy clo hex ane ▁was ▁first ▁proposed ▁as ▁early ▁as ▁ 1 8 9 0 ▁by ▁Hermann ▁Sach se , ▁but ▁only ▁gained ▁w ides p read ▁accept ance ▁much ▁later . ▁The ▁new ▁con formation ▁puts ▁the ▁car b ons ▁at ▁an ▁angle ▁of ▁ 1 0 9 . 5 ° . ▁Half ▁of ▁the ▁hyd rog ens ▁are ▁in ▁the ▁plane ▁of ▁the ▁ring ▁( equ atorial ) ▁while ▁the ▁other ▁half ▁are ▁per pend icular ▁to ▁the ▁plane ▁( ax ial ). ▁This ▁con formation ▁allows ▁for ▁the ▁most ▁stable ▁structure ▁of ▁cy clo hex ane . ▁Another ▁con formation ▁of ▁cy clo hex ane ▁exists , ▁known ▁as ▁boat ▁con formation , ▁but ▁it ▁inter con ver ts ▁to ▁the ▁slightly ▁more ▁stable ▁chair ▁formation . ▁If ▁cy clo hex ane ▁is ▁mon o - subst it uted ▁with ▁a ▁large ▁subst itu ent , ▁then ▁the ▁subst itu ent ▁will ▁most ▁likely ▁be ▁found ▁attached ▁in ▁an ▁equ atorial ▁position , ▁as ▁this ▁is ▁the ▁slightly ▁more ▁stable ▁con formation . ▁ ▁Cy clo hex ane ▁has ▁the ▁lowest ▁angle ▁and ▁t ors ional ▁stra in ▁of ▁all ▁the ▁cy clo alk anes ; ▁as ▁a ▁result ▁cy clo hex