Assign relative priorities to each set of substituents:
a. -Br, -I, -OH, -CH₃

Guida verificata passo dopo passo

Step 1: Understand the Cahn-Ingold-Prelog (CIP) priority rules. These rules are used to assign priorities to substituents based on atomic number, isotopic mass, and connectivity. The higher the atomic number, the higher the priority.

Step 2: Compare the atomic numbers of the atoms directly attached to the carbon. For the given substituents: -Br (atomic number 35), -I (atomic number 53), -OH (oxygen has atomic number 8), and -CH3 (carbon has atomic number 6). Assign priorities based on these atomic numbers.

Step 3: Assign the highest priority to the substituent with the highest atomic number. In this case, iodine (-I) has the highest atomic number (53), so it gets the highest priority.

Step 4: Assign the second highest priority to bromine (-Br), as it has the next highest atomic number (35). Oxygen (-OH) comes next with an atomic number of 8, followed by carbon (-CH3) with an atomic number of 6.

Step 5: Finalize the relative priorities as follows: 1) -I, 2) -Br, 3) -OH, 4) -CH3. These priorities will be used in stereochemical assignments such as R/S configuration or E/Z isomerism.

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