I don't get this example - number environments
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I don't get this example - number environments

[From: ] [author: ] [Date: 12-06-15] [Hit: ]
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1-methylbenzene

Here is the diagram
http://postimage.org/image/g1sw1qnw7/

It is showing the number of environments but I don't see why Cb and Cb are the same and why Cc and Cc are the same (hence the same colours).

PLEASE PLEASE EXPLAIN

because Cb and Cb are C-H? But Ca is C-H too!

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ah my friend it is not just the local environment but the bigger picture

OK - if we just had benzene you agree the all all the same - and spectrosocpy like NMR agrees

the thing that breaks the symmetry is the methly group

c is just one Carbon form that symmetry breaker
b is 2 carbonds form the symmetry breaker
a is at the opposite end (para)

think in terms of the bigger picture
1
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