How many isomers of #C_4H_8Cl_2# are here? How do you tell if one structure is an isomer of another?

Answer 1

Ruby Allen

I count 13 isomers of #"C"_4"H"_8"Cl"_2#: 9 structural isomers and 4 optical isomers,

I find that the easiest way to tell if one structure is an isomer of another is to write their IUPAC names.

Each isomer will have a unique name.

We use a systematic procedure to generate the structures.

A. Base chain is 1-chlorobutane

1,1-Dichlorobutane

(#R#)- and (#S#)-1,2-Dichlorobutane

(#R#)- and (#S#)-1,3-Dichlorobutane

1,4-Dichlorobutane

B. Base chain is 2-chlorobutane

2,2-Dichlorobutane

(#2R,3R)"-", (2S,3S)#-, and (#2R,3S#)-2,3-Dichlorobutane

C. Base is 1-chloro-2-methylpropane

1,1-dichloro-2-methylpropane

1,2-Dichloro-2-methylpropane

1,3-Dichloro-2-methylpropane

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Answer 2

Zoe Alexander

There are three isomers of C4H8Cl2: 1,1-dichlorobutane, 1,2-dichlorobutane, and 2,3-dichlorobutane. Isomers are molecules with the same molecular formula but different structural arrangements of atoms. To determine if one structure is an isomer of another, compare their structural arrangements and connectivity of atoms. If they have the same molecular formula but different structural formulas, they are isomers.

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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.