brid ised ▁orbit als ) ▁and ▁leads ▁to ▁significant ▁ring ▁stra in . ▁The ▁mole c ule ▁also ▁has ▁t ors ional ▁stra in ▁due ▁to ▁the ▁e cli ps ed ▁con formation ▁of ▁its ▁hydro gen ▁atoms . ▁As ▁such , ▁the ▁b onds ▁between ▁the ▁carbon ▁atoms ▁are ▁consider ably ▁we aker ▁than ▁in ▁a ▁typical ▁alk ane , ▁resulting ▁in ▁much ▁higher ▁react ivity . ▁ ▁Bond ing ▁between ▁the ▁carbon ▁cent res ▁is ▁generally ▁described ▁in ▁terms ▁of ▁bent ▁b onds . ▁In ▁this ▁model ▁the ▁carbon - car bon ▁b onds ▁are ▁bent ▁out wards ▁so ▁that ▁the ▁inter - orb ital ▁angle ▁is ▁ 1 0 4 ° . ▁ ▁This ▁reduces ▁the ▁level ▁of ▁bond ▁stra in ▁and ▁is ▁achieved ▁by ▁dist ort ing ▁the ▁sp 3 ▁hy brid isation ▁of ▁carbon ▁atoms ▁to ▁techn ically ▁sp 5 ▁hy brid isation ▁( i . e . ▁ ▁s ▁density ▁and ▁ ▁p ▁density ) ▁so ▁that ▁the ▁C - C ▁b onds ▁have ▁more ▁ π ▁character ▁than ▁normal ▁( at ▁the ▁same ▁time ▁the ▁carbon - to - h ydro gen ▁b onds ▁gain ▁more ▁s - character ). ▁One ▁unusual ▁consequence ▁of ▁bent ▁bond ing ▁is ▁that ▁while ▁the ▁C - C ▁b onds ▁in ▁cy clo prop ane ▁are ▁we aker ▁than ▁normal , ▁the ▁carbon ▁atoms ▁are ▁also ▁closer ▁together ▁than ▁in ▁a ▁regular ▁alk ane ▁bond : ▁ 1 5 1 ▁pm ▁versus ▁ 1 5 3 ▁pm ▁( aver age