nomenclature and structure?

[baywatch123]

ok this is a ridiculous question, but i'm slowly starting to psych myself out....

CH3(CH2)2Br be H3C-CH2-CH2-Br? 1-bromopropane
and if it was CH3(CH3)2Br, it would be just 2-bromopropane right?

thank you

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[StumpMT]

The first one is correct. CH3(CH2)2Br = H3C-CH2-CH2-Br = 1-bromopropane
The second one cannot exist as written. 2-bromopropane would be CH3CHBrCH3 = CH3-CH-CH3 with the Br attached to CH.
CH3(CH3)2Br is missing a C to attach to the Br so it would be CH3(CH3)2CBr which would be 2-bromo-2-methylpropane or tert butyl bromide (it would look like a + with Br attached to)

Here is a quick sketch of 1-bromopropane and 2-bromopropane. The best thing to do is to draw the structures out to see for yourself.

Hope this helps.

 

[baywatch123]

yeahhhh trueee. i dunno during practice tests i tend to freeze when i see CH3.......blah blah mainly due to time

but yes it makes sense now thank you