# What are all the structural isomers of a tertiary amine with the sum formula C6H15N?

According to the solutions there exist 7 different structural isomers 'containing 3 degree amines' for the molecular formula $\ce{C_6H_{15}N}$

I tried and made a few, here are those

I have been trying since an hour and all I made were the repetitions of these 5 only. Could anyone suggest me the remaining 2?

• There is a methyl ethyl propyl amine and methyl ethyl isopropyl amine . – LDC3 Apr 4 '15 at 5:05
• Welcome to chemistry.se! Find out about the site by taking the tour and about formatting in the help center. If you get helpful answers, please consider accepting one. – Martin - マーチン Apr 4 '15 at 5:16

Please note that this is just a visualization of the comment given by LDC3!

Here are the two missing isomers:

• The drawings were made using BKChem under Linux. The program is in the repositories of all major Linux distributions, There also seem to be Windows and OSX ports at BKChem which I haven't tried. The program was initially written by Beda Kosata and is currently maintained by Reinis Danne. Sources are available from her repository on gitorious. – Klaus-Dieter Warzecha Apr 4 '15 at 7:42