Question

Please help with the attached photo, please explain each. thank you ​

Answer 1

a) 3,4 dimethyl hexane.

b) 3 methyl hexane

c) 2, 4 dimethyl heptane

d) 2,4 di methtl hexane

Step-by-step explanation:

• Identify the longest chain.
• Number the carbons of the longest chain such that the sum of numbers at branch (methyl group here) is minimum.( You may need to do that more than once here)
• Name the group after mentioning the number of carbon it is at.
• Use di if two same groups are present. Tri for 3, tetra for 4 and so on.
• Naming thr longest chain is the last thing. If the hydrocarbon is pure (only H and C are present) use -ane as the ending and the number of carbon 1- meth , 2 - eth , 3 - prop, 4 -beut, 5- pent 6- hex and hept for 7 are used as prefix.

Answer 2

See below

Step-by-step explanation:

Part 1)

• The longest chain is of 6-C compound. Hence, we'll use the prefix "Hex-".
• It is an alkane. So, "-ane" will be used as a suffix.
• So, The parent compound is "Hexane".
• Now, Name the substituents by numbering the Hexane chain.
• The substituents (methyl) are attached to carbon no. 3 and 4

So, The name becomes 3,4-dimethyl hexane.

Part 2)

• The longest chain is of 6-C compound. => "Hex-"
• Alkane => "-ane"
• "Hexane"
• Number the longest carbon chain.
• The substituent (methyl) is attached to Carbon no. 3.

So, The name becomes 3-methyl hexane.

Part 3)

• Longest chain is of 7-C compound => "Hept-"
• Alkane => "-ane"
• "Heptane"
• Number the largest carbon chain.
• The substituents (methyl) are attached to carbon no. 2 and 5.
• 2 methyl => "di-"

So, The name becomes 2,5-dimethyl heptane.

Part 4)

• Longest chain is of 6-C compound => "Hex-"
• Alkane => "-ane"
• "Hexane"
• Number the longest carbon chain.
• The substituents are attached to carbon no. 2 and 4.
• 2 methyl => "di-"

So, The name becomes 2,4-dimethyl hexane.

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Hope this helped!

~AH1807