- #1
danago
Gold Member
- 1,123
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Hey. I've just started organic chemistry in class, and I am currently up to naming compounds, and isomerism.
Ive been going through some excersizes, and came across a few questions I am having trouble with.
The first one:
http://img136.imageshack.us/img136/870/3methylpentanech5.gif
The answer book says its called 3-methylpentane. I can't understand why though. The longest carbon chain consists of 5 atoms, therefore making it a pentane, but from what i can understand, there is a branch off the second carbon, so i would have thought it would be called 2-ethylpentane, but apparently not. Where am i going wrong?
The next two I am very confused with. How do i draw them? I am a little lost as to how to handle the brackets.
[tex]
\begin{array}{l}
(CH_3 )_2 CHCH(CH_3 )_2 \\
CH_3 CH_2 C(CH_3 )_2 CH(CH_2 CH_3 )CH_2 CH_2 CH_3 \\
\end{array}
[/tex]
All help greatly appreciated.
Thanks,
Dan.
Ive been going through some excersizes, and came across a few questions I am having trouble with.
The first one:
http://img136.imageshack.us/img136/870/3methylpentanech5.gif
The answer book says its called 3-methylpentane. I can't understand why though. The longest carbon chain consists of 5 atoms, therefore making it a pentane, but from what i can understand, there is a branch off the second carbon, so i would have thought it would be called 2-ethylpentane, but apparently not. Where am i going wrong?
The next two I am very confused with. How do i draw them? I am a little lost as to how to handle the brackets.
[tex]
\begin{array}{l}
(CH_3 )_2 CHCH(CH_3 )_2 \\
CH_3 CH_2 C(CH_3 )_2 CH(CH_2 CH_3 )CH_2 CH_2 CH_3 \\
\end{array}
[/tex]
All help greatly appreciated.
Thanks,
Dan.
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