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Is CH3CH2CH2CH(CH3)2 a primary, secondary or tertiary carbon and why?

I just started Chem and I am having a hard time getting started.

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Dr. Chandrani M. | I am Organic Chemistry Teacher and Your Science TeacherI am Organic Chemistry Teacher and Your ...
1

Both CH2 (2nd CH2 and 3rd CH2 from left) Has Secondary Carbon atom

There is only 1 CH  and this carbon is Tertiary

All the CH3 Carbons are Primary Carbon atom (1st CH3 and last 2 CH3)

 

Michael B. | Seasoned and experienced tutor with extensive science backgroundSeasoned and experienced tutor with exte...
1

Just to chime in, the atom designation increases with the amount of carbon atom bonding.

A primary carbon has one carbon atom bonded to it.

A secondary carbon atom has two carbon atoms bonded to it.

A tertiary carbon atom has three carbon atoms bonded to it.

A quaternary carbon atom has four carbon atoms bonded to it.

Arthur S. | Math, Science, Chemistry, and Computer TutorMath, Science, Chemistry, and Computer T...
0

First you must look for the longest chain of carbons to correctly determine the configuration. That is five carbons with a methyl group on number 4 so the second methylene group is attached to two other carbons and therefore secondary.

There is one tertiary carbon and the primary carbons are 1, 5 and the methyl group attached to 4.

Art

George C. | Humboldt State and Georgetown graduateHumboldt State and Georgetown graduate
5.0 5.0 (2 lesson ratings) (2)
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Ambiguous.  Which carbon are you talking about in this pentane molecule?  There are examples of each here, but which is unclear.

There are 3 1°, 2 2º, and 1 3º carbon here.

Elizabeth D. | Science, Math, and How to Write about ThemScience, Math, and How to Write about Th...
5.0 5.0 (4 lesson ratings) (4)
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Primary (1º) is a carbon with three hydrogens on it.

Secondary (2º) is a carbon with two hydrogens on it.

Tertiary (3º) is a carbon with only one hydrogen on it.