z 4 ethylhex 2 ene formula c8h16 structural formula for 4 ethyl 4 ethyl 2 hexene structural condensed z 4 ethylhex 2 ene formula c8h16 hydrocarbon bartleby 3 ethyl 2 hexene structure c8h16 4 ethylheptane formula c9h20 over 2e 4 ethyl 5 methylhex 2 ene structure the compound 2 ethylhex 2 ene 1 thiol 3 dichloro 4 ethyl hex 2 ene ethyl 2 2 dimethyl hexane 2 ethyl 1 hexene 1632 16 2 c8h16