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# How many secondary carbon atoms are there in ${{\left( C{{H}_{3}} \right)}_{2}}CHC{{H}_{2}}CH{{\left( C{{H}_{3}} \right)}_{2}}$?

Last updated date: 19th Jul 2024
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Hint: A hydrocarbon chain may involve various carbon atoms. These are termed according to the carbon atoms attached adjacent to them. When a carbon has only one carbon atom attached, it is termed as primary carbon atom, while when it has 2 carbon atoms attached to it is called as secondary carbon atom. To recognize them a structural formula has to be drawn.

A hydrocarbon long chain may have alkyl groups attached at various positions that define the nature of the attached carbon atoms as primary $1{}^\circ$, secondary $2{}^\circ$and tertiary $3{}^\circ$. There are hydrogen atoms attached with these carbon atoms that are also termed in the same way as primary, secondary, and tertiary.
We have been given a compound that has a formula ${{\left( C{{H}_{3}} \right)}_{2}}CHC{{H}_{2}}CH{{\left( C{{H}_{3}} \right)}_{2}}$, we have to identify the secondary carbon atoms. For this let’s see the structural formula and label the carbon atoms as, 1 to 5.
Hence, there is only 1 secondary carbon atom present in ${{\left( C{{H}_{3}} \right)}_{2}}CHC{{H}_{2}}CH{{\left( C{{H}_{3}} \right)}_{2}}$.