Question

Any chemistry expert to help me in naming 5 isomers of C5H8O?

Answer 1

Actually, there are 71 different isomers of C5H80. 

1. C-CCOC=C this is e-(ethenyloxy)prop-1-ene
2. OCCC#C  this one is pent-4-yn-1-ol
3. OC1CC-CC1 jc.3 or cyclopent -3-en-ol
4. CC(=0)CC1CC1 or 1-cyclopylathen-1-one
5. O=C1CCCC1 or cylopentanone

You can also break this down further:

Alcool has 3:

1. Bicylique 
2. Cyclique
3. diene
4. yne

Enol

Aldehyde

1. cyclique
2. lineaine

Certonie

1. cyclique
2. lineaine

To understand isomers you must realize that an isomer a molecule that has the molecular as a different molecule. Each of these molecules has a different chemical structure. Isomers must contain the numbers of atoms for each isomer. Normally isomers won't won't always share the same properties unless they are in the same fuctional group. You can see this in Alcool, Alehyde and Cetronie. 

Comments

Your structures aren't correct but then thanks for the trial.

Answer 2

• 3-penten-2-one
• 2-methylbut-3yn-2-ol
• trans-2-methyl-2-butenal
• 2,3-dihydropyran

I highly recommend an organic chemistry video with rules on how to drawn skeletal and kekule structures and isomerism (as a full course) if someone wants to understand and practice.

Answer 3

1. 2-Methyl-1-butanol (2-Methylbutan-1-ol)

2. 2-Methyl-2-butanol (2-Methylbutan-2-ol)

3. 1-Methyl-2-propanol (1-Methylpropan-2-ol)

4. 2-Methyl-2-propanol (2-Methylpropan-2-ol)

5. Pentan-1-ol (1-Pentanol)

Answer 4

Here are some of the 5 isomers of C5H8O:

2-pentanone

3-pentanone

methyl isopropyl ketone

2-methylbutanal

3-methylbutanal etc.