Rank the following groups in order of decreasing priority according to the Cahn-Ingold-Prelog system. $$\begin{array} { c c c c }
- \mathrm { CH } _ { 2 } \mathrm { CH } _ { 3 } & - \mathrm { CH } _ { 3 } & - \mathrm { H } & - \mathrm { CH } \left( \mathrm { CH } _ { 3 } \right) _ { 2 } \
\text { I } & \text { II } & \text { III } & \text { IV }
\end{array}$$

Question

Rank the following groups in order of decreasing priority according to the Cahn-Ingold-Prelog system. $$\begin{array} { c c c c } 
- \mathrm { CH } _ { 2 } \mathrm { CH } _ { 3 } & - \mathrm { CH } _ { 3 } & - \mathrm { H } & - \mathrm { CH } \left( \mathrm { CH } _ { 3 } \right) _ { 2 } \
\text { I } & \text { II } & \text { III } & \text { IV }
\end{array}$$

Quizplus · Accepted Answer

The Cahn-Ingold-Prelog priority rules rank substituents based on atomic number. The group -CH(CH3)2 (IV) has the highest priority due to the presence of more carbon atoms, followed by -CH2CH3 (I), then -CH3 (II), and finally -H (III) with the lowest priority.

Rank the Following Groups in Order of Decreasing Priority According