Organic Chemistry Naming Branched Hydrocarbons 1 st Determine the longest continuous carbon chain CH 3 CH 3 CH 3 -CH 2 -CH 2 -CH-CH -CH--CH 2 –CH 3 CH-CH 3 CH 3 CH 3 CH 3 CH3-CH2-CH2-CH-CH-CH-CH 2 –CH 2 -CH 3 CH-CH 3 CH 3

Organic Chemistry Naming Branched Hydrocarbons 2 nd Add the ending –yl to every group branching off the longest chain (if more than one of the same group add the prefixes) (di=2, tri=3, tetra=4) alphabetically according to –yl group CH 3 CH 3 CH 3 -CH 2 -CH 2 -CH-CH-CH-CH 2 –CH 3 CH-CH 3 CH 3

Organic Chemistry Naming Branched Hydrocarbons 3 rd Number the longest continuous carbon chain to write the lowest locant possible in the name. 4 th Insert the numbers in the name. 5 th Punctuate the name (insert hyphens and commas). CH 3 CH 3 CH 3 -CH 2 -CH 2 -CH-CH-CH-CH 2 –CH 3 CH-CH 3 CH 3 CH 3 CH 3 CH 3 -CH 2 -CH 2 -CH-CH-CH-CH 2 –CH 3 CH-CH 3 CH ethyl 457 trimethyloctane OR