How many straight-chain isomers are there of hexene, #C_6H_12#?

Answer 1

Five isomers

The double bond may be between carbon 1 and 2, or 2 and 3, or 3 and 4. If the double bond is between carbon 2 and 3 or 3 and 4 there are 2 geometric isomers for each case (cis- and trans)

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Answer 2

There are 5

Of course, there are no straight chain answers, because most bonds rotate around the #"C"#-atoms, except for the double bonds, and even those are not straight.

These bonds can be between #"C"#1=#"C"#2, #"C"#2=#"C"#3 and #"C"#3=#"C"#4.
(The others are mirror-images if you count from the other side of the chain.)

Now, with every double bond, there are two possibilities: cis or trans

If the rest of the molecule is on the same side it's called cis:
For the double bond between #"C"#1=#"C"#2 this doesn't make a difference, but for the other two, there are two possibilities, bringing the total to five.

  • hex-#1#-ene
  • cis-hex-#2#-ene
  • trans-hex-#2#-ene
  • cis-hex-#3#-ene
  • trans-hex-#3#-ene

    Another way of showing if a molecule is cis or trans is using *E-Z notation*.

    (Pictures from Wiki of the two possibilities of but-2-ene)

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Answer 3

There are five straight-chain isomers of hexene, C6H12.

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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.

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.

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.

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.

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