Are Esters polar or non polar and what is the explanation.?
Furthermore what is the melting point will it be higher or lower as the carbon chain increases
Answer:
Esters are most definitely polar. The C=O bond is highly polarised (the oxygen is more electronegative than the carbon, and hence the bond will have a dipole).
You cannot say that the vector sum of the dipoles of the C-O bonds will cancel because (1) the two bonds are not the same, one is single, the other is double, and (2) they aren't in opposite directions - the bond angle is about 120 degrees.
However, yes, as the alkyl chain length increases, the melting and boiling points will increase. This is due to attraction forces (induced dipole - induced dipole forces) between the non-polar alkyl chains.
Ester is non polar... by looking at the structural formula.. the vector sum of the dipole moment from oxygens will be calcelled out.
As the alky group increases, the melting point also increases.
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Answer:
Esters are most definitely polar. The C=O bond is highly polarised (the oxygen is more electronegative than the carbon, and hence the bond will have a dipole).
You cannot say that the vector sum of the dipoles of the C-O bonds will cancel because (1) the two bonds are not the same, one is single, the other is double, and (2) they aren't in opposite directions - the bond angle is about 120 degrees.
However, yes, as the alkyl chain length increases, the melting and boiling points will increase. This is due to attraction forces (induced dipole - induced dipole forces) between the non-polar alkyl chains.
Ester is non polar... by looking at the structural formula.. the vector sum of the dipole moment from oxygens will be calcelled out.
As the alky group increases, the melting point also increases.
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