Solutions1860-1870
1. Crum Brown's formulas
Expanded formulas made it easier to predict isomers. Write the two compounds of formula C2H6O.
Ethanol, CH3–CH2–OH, and dimethyl ether, CH3–O–CH3. They have the same molecular formula but their atoms are bonded differently.
2. Ortho, meta and para
How many dichlorobenzenes, C6H4Cl2, are there? Why does the hexagonal structure of benzene explain it?
Three: ortho (1,2), meta (1,3) and para (1,4). In a regular hexagon, two substituents can only be on adjacent carbons, separated by one carbon, or opposite each other.