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How many isomers exist for #C_5H_10#?

Answer 1

Not counting geometric isomers, I can count at least 9 isomers. There may be more.

A formula of #C_5H_10# has #1^@# of unsaturation. What does this mean? It means that in comparison to the saturated formula, #C_5H_12#, this formula has #2# hydrogens fewer. A degree of unsaturation specifies an unsaturated bond OR a ring.

So I can make at least 4 olefins with this formula (one of which has a geometric isomer); given the formula, the double bond can be either at #C1# or #C2#.

A five-membered ring, a four-membered ring, and three three-membered rings are the five alicyclic structures that can be formed from a ring junction; one of the three-membered rings can have geometric isomers.

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Answer 2

Skylar Alexander

For (C_5H_{10}), there are three isomers:

Pentane
2-Methylbutane
2,2-Dimethylpropane

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Answer 3

Ava Andrews

For (C_5H_{10}), there are three isomeric structures:

Pentane: This is a straight-chain alkane with the formula (C_5H_{12}).
Isopentane: Also known as methylbutane, it has the formula (CH_3CH(CH_3)CH_2CH_3).
Neopentane: This is 2,2-dimethylpropane with the formula (CH_3C(CH_3)_3).

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.