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Isomerism help please!!

HI,

I have been given this list of chemicals and some questions on isomerism and was wondering if anyone could help?id be eternally grateful!!

k the chemicals are:

a)Pentane
b)Butan-1-ol
c)Butan-2-ol
d)2-methylbutane
e)tetrachloromethane
f)trichloromethane
g)ethoxyethane
h)propanoic acid
i)Methyl ethanoate
j)1-bromoethanol

I have to answer:
1) molecules that are positional isomers of eachother
2) three molecules that are all strutural isomers of eachother
3) molecules that are chain isomers of eachother
4) a molecule that is a functional group ismer of butan-1-ol
5)all molecules that can exhibit stereoisomerism
6) one molecule that has an isomer, not shown above, that has exactly the same boiling point.

I have attempted it and havegot the answers:
1) b and c
2) b, c and g
3) a and d

and after that it all gets a lil confusing and i think im thinking too much in depth and the answers are actually easy?..wel im hoping this is the case!!

I anyone could help even a little bit i would be really grateful

thankyou very much x
e = mc(squared)

a solution to all ur problems
I got:

1) b, c
2) b, c, g
3) a, d
4) c
5) j
6) don't know this one, sorry!

I did them by drawing them all out. Makes it easier if you're stuck.
Reply 3
For numer six, try naming two enantiomers. (And I say "try" because I'm not totally sure about what the question asks) They should have exactly the same boiling point.
j: 1-bromoethanol: CH3CHBrOH
and butan-2-ol: CH3CHOHCH2CH3

have two enantiomeric forms with the same boiling point
weasympm
HI,
a)Pentane
b)Butan-1-ol
c)Butan-2-ol
d)2-methylbutane
e)tetrachloromethane
f)trichloromethane
g)ethoxyethane
h)propanoic acid
i)Methyl ethanoate
j)1-bromoethanol

I have to answer:
1) molecules that are positional isomers of eachother
2) three molecules that are all strutural isomers of eachother
3) molecules that are chain isomers of eachother
4) a molecule that is a functional group ismer of butan-1-ol
5)all molecules that can exhibit stereoisomerism
6) one molecule that has an isomer, not shown above, that has exactly the same boiling point.


1) (b,c)
2) (b,c,g)
3) (a,d)
4) (g)
5) j
6) j - its optical isomer. If you alter the chemical in a structural any way the boiling point will change even if the change is slight.
Only changing the stereochemistry will not alter the bp.
icedsarcasm
I got:

1) b, c
2) b, c, g
3) a, d
4) c
5) j
6) don't know this one, sorry!

I did them by drawing them all out. Makes it easier if you're stuck.


I think 4) is incorrect as its an isomer, but a position rather than Functional Group
Turdburger
I think 4) is incorrect as its an isomer, but a position rather than Functional Group


Oops, my mistake!
Reply 8
Turdburger

1) (b,c)
2) (b,c,g)
3) (a,d)
4) (g)
5) j
6) j - its optical isomer. If you alter the chemical in a structural any way the boiling point will change even if the change is slight.
Only changing the stereochemistry will not alter the bp.


also c for number 5.
Darrell90
also c for number 5.


oops. Well spotted.

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