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How many structural isomers have the molecular formula C3H6F2? A - HSC - SSCE Chemistry - Question 8 - 2023 - Paper 1
Question 8
How many structural isomers have the molecular formula C3H6F2? A. 2 B. 3 C. 4 D. 5
Worked Solution & Example Answer:How many structural isomers have the molecular formula C3H6F2? A - HSC - SSCE Chemistry - Question 8 - 2023 - Paper 1
Step 1
Identify possible structural isomers
Answer
To find the structural isomers of C3H6F2, we need to consider how the carbon atoms can be arranged while adhering to the tetravalency of carbon. The formula suggests there are three carbon atoms, each capable of forming up to four bonds. The presence of fluorine also influences the bonding patterns.
- The backbone can involve either a straight-chain structure (propane) or branched structures.
- Each structure should accommodate the two fluorine atoms while balancing the hydrogen atoms.
Step 2
Draw the structural isomers
Answer
The two main structural isomers are:
- 1,1-Difluoropropane: Both fluorine atoms are attached to the same carbon atom.
- 1,2-Difluoropropane: Each fluorine atom is attached to different carbon atoms.
- 2,2-Difluoropropane: Both fluorine atoms are attached to the middle carbon atom.
By considering these arrangements, we can count the unique structures formed.
Step 3