OChem quest..

[TimeforDAT]

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1. why is the chair conformation of 1,4 dimethylcyclohexane more stable than the normal cyclic conformation?

2. using Z or E to name geometric isomers is the iupac name, so then what is cis and trans considered to be? the common name?

 

[jdoc04]

1. why is the chair conformation of 1,4 dimethylcyclohexane more stable than the normal cyclic conformation?

2. using Z or E to name geometric isomers is the iupac name, so then what is cis and trans considered to be? the common name?

What do you mean by normal?? Chair 1,4 conformation places the Methyl groups furthest from one another lowering steric effects. If you don't understand why build a model.

I don't fully understand your 2nd question.

 

[whoaaitzkyle]

1. why is the chair conformation of 1,4 dimethylcyclohexane more stable than the normal cyclic conformation?

2. using Z or E to name geometric isomers is the iupac name, so then what is cis and trans considered to be? the common name?

Don't understand what you're saying in #2

Chair formation is always the most stable.

 

[TimeforDAT]

What do you mean by normal?? Chair 1,4 conformation places the Methyl groups furthest from one another lowering steric effects. If you don't understand why build a model.

I don't fully understand your 2nd question.

well normal as in like your typical cyclohexane

for the second question..i remember seeing a question that asked which was the corrrect IUPAC name for a molecule...i don't remember exactly the molecule, but it was something like (Z) - something for one choice and (cis) - something for another choice..the right answer was (Z)- something.

so i was just wondering what "cis" and "trans" is considered...

 

[jdoc04]

well normal as in like your typical cyclohexane

for the second question..i remember seeing a question that asked which was the corrrect IUPAC name for a molecule...i don't remember exactly the molecule, but it was something like (Z) - something for one choice and (cis) - something for another choice..the right answer was (Z)- something.

so i was just wondering what "cis" and "trans" is considered...[/QUO

http://en.wikipedia.org/wiki/Geometric_isomerism

Scroll down to E/Z good explanation when to look for E/Z