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Question
In which of the following compounds the carbon marked with asterisk is expected to have greatest positive charge?
Options
*CH3 – CH2 – Cl
*CH3 – CH2 – Mg+ Cl–
*CH3 – CH2 – Br
*CH3 – CH2 – CH3
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Solution
*CH3 – CH2 – Cl
Explanation:
Order of electronegativity of the attached group is as follows:
Cl > Br > C > Mg.
More electronegative group attached to the C will give more positive charge. Therefore, in case asterisk C will have greatest positive charge.
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\[\begin{array}{cc}
\phantom{.........}\ce{O}\\
\phantom{.........}||\\
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\end{array}\]
\[\begin{array}{cc}
\phantom{.........}\ce{\overset{⊕}{O}}\\
\phantom{.........}|\\
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\end{array}\]
\[\begin{array}{cc}
\phantom{.........}\ce{\overset{⊕}{O}}\\
\phantom{.........}|\\
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\end{array}\]
