Name these compounds, according to the IUPAC system

H H
\ /
C=C
/ \
CH3 CH2CH3

and

CH3-CH2 H
\ /
C=C
/ \
H CH2-CH-CH3
|
CH3

Thank you

To name these compounds according to the IUPAC system, we need to follow a few steps.

For the first compound:
1. Identify the main carbon chain: The longest continuous carbon chain is 4 carbons.
2. Number the carbon chain: Start from the end closest to the double bond and assign numbers to each carbon atom. In this case, we start from the left-hand side as number 1, and continue to the right-hand side.
3. Identify and name substituents: The substituents on the main chain are a methyl group (CH3) attached to carbon 3 and an ethyl group (CH2CH3) attached to carbon 4.
4. Name the compound: Combine the names of the substituents with the name of the main chain, with the substituents listed in alphabetical order. Use the prefixes "di," "tri," etc., as necessary to indicate multiple identical substituents. The name for this compound is 3-methyl-4-ethylbut-2-ene.

For the second compound:
1. Identify the main carbon chain: The longest continuous carbon chain is 5 carbons.
2. Number the carbon chain: Start from the end closest to the double bond and assign numbers to each carbon atom. In this case, we start from the left-hand side as number 1 and continue to the right-hand side.
3. Identify and name substituents: The substituents on the main chain are a methyl group (CH3) attached to carbon 3, an ethyl group (CH2CH3) attached to carbon 4, and a propyl group (CH2CHCH3) attached to carbon 5.
4. Identify and name additional groups: There's an ethyl (CH2CH3) group attached to carbon 1 and a methyl (CH3) group attached to the third carbon in the propyl group (number 6).
5. Name the compound: Combine the names of the substituents and the additional groups with the name of the main chain, with the substituents and additional groups listed in alphabetical order. Use the prefixes "di," "tri," etc., as necessary to indicate multiple identical substituents. The name for this compound is 1-ethyl-3,6-dimethyl-5-ethylhept-3-en-2-yne.

I hope this helps you name the compounds according to the IUPAC system!