Common Names

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Patricia Capiral 3G
Posts: 11
Joined: Fri Sep 25, 2015 3:00 am

Common Names

Postby Patricia Capiral 3G » Sun Feb 28, 2016 4:05 pm

Can someone explain to me when the different prefixes are used when writing the common name? I'm a bit confused on how to determine whether it's iso-, neo-, tert-, and sec-. Thank you!

ReijianiRelova1G
Posts: 12
Joined: Fri Sep 25, 2015 3:00 am

Re: Common Names

Postby ReijianiRelova1G » Sun Feb 28, 2016 5:22 pm

Iso groups has a "v" shape to it like a greater than or less than sign. A neo group has a "t" shape, almost like an x. A tert group has a t shape as well, but it the cross bar does not go through the vertical line the whole way. A sec group is a substituent that looks like a regular line structure (zigzags).

Rachel Russell 4B
Posts: 12
Joined: Fri Sep 25, 2015 3:00 am

Re: Common Names

Postby Rachel Russell 4B » Sun Feb 28, 2016 5:38 pm

It's all based on the shape of the molecule! This video helps explain:

https://www.khanacademy.org/science/organic-chemistry/bond-line-structures-alkanes-cycloalkanes/naming-alkanes/v/common-and-systematic-naming-iso-sec-and-tert-prefixes

It starts talking about the prefixes at 4:28

Sophia 3F
Posts: 17
Joined: Fri Sep 25, 2015 3:00 am

Re: Common Names

Postby Sophia 3F » Sun Feb 28, 2016 6:30 pm

So are common names only used for alkanes? Can they also be used on saturated substituents on alkenes/alkynes?

Hannah Markovic 3C
Posts: 32
Joined: Fri Sep 25, 2015 3:00 am

Re: Common Names

Postby Hannah Markovic 3C » Sun Feb 28, 2016 6:32 pm

Yes, common names can also be used with unsaturated parent chains.


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