How many isomers are possible for octane? Share with your friends Share 1 Mohit Gupta answered this Kindly refer to the following:https://www.meritnation.com/ask-answer/question/plssssssssss-help-me-to-draw-structural-isomers-of-heptane/carbon-and-its-compounds/1448691 -1 View Full Answer Choco Chip answered this octance has 18 structural isomers n-octane 2-methyl heptane 3-methyl heptane 4-methyl heptane 2,2-dimethyl hexane 2,3-dimethyl hexane 2,4-dimethyl hexane 2,5-dimethyl hexane 3,3-dimethyl hexane 3,4-dimethyl hexane ethyl hexane (no number needed) 2,2,3-trimethyl pentane 2,2,4-trimethyl pentane 2,3,3-trimethyl pentane(number it from the right side) 2,3,4-trimethyl pentane 0 Choco Chip answered this only 15 i can get hope this helps !! 2
n-octane 
2-methyl heptane 
3-methyl heptane 
4-methyl heptane 
2,2-dimethyl hexane 
2,3-dimethyl hexane 
2,4-dimethyl hexane 
2,5-dimethyl hexane 
3,3-dimethyl hexane 
3,4-dimethyl hexane 
ethyl hexane 
2,2,3-trimethyl pentane 
2,2,4-trimethyl pentane 
2,3,3-trimethyl pentane
2,3,4-trimethyl pentane