Answer
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Hint: This compound that is given in the question is an exception in chemistry and hydrogen bonding, as chlorine does not generally show hydrogen bonding but in this molecule it shows hydrogen bonding.
Complete answer:
The correct answer to this question is option A, only intramolecular H-bonding occurs in chloral hydrate, that is \[CC{{l}_{3}}CH{{(OH)}_{2}}\] .
First, we have to understand the difference between intermolecular hydrogen bonding and intramolecular hydrogen bonding.
Intermolecular hydrogen bonding occurs between two same or different kinds of molecule, and intra molecular hydrogen bonding occurs between the atoms of the same molecule.
Thus, let us take a look at the structure of chloral hydrate, that is \[CC{{l}_{3}}CH{{(OH)}_{2}}\] .
As shown in the above figure, the molecule of chloral hydrate comprises carbon, chlorine, hydrogen and oxygen. Carbon is not shown in the figure but it is there between the bonds of chlorines and oxygens.
The dotted line in the above figure shows hydrogen bonding between chlorine and hydrogen. Therefore, the compound chloral hydrate contains an intra molecular hydrogen bond.
Thus, option D, which says the compound does not contain any type of hydrogen bond, gets automatically discarded.
But, the compound does not contain an intermolecular hydrogen bond, thus the answer is option A, chloral hydrate only contains intra molecular hydrogen bond.
Note:
Chlorine does not show hydrogen bonding due to its electron density which comes from the size of its atom. Despite chlorine being highly electronegative, it does not form hydrogen bonding, neither intra nor inter. This example is an exception to that statement, a reason is believed that as the given compound is a geminal diol. Geminal diols are generally unstable compounds, so to make it stable, chlorine might have formed an intramolecular hydrogen bond.
Complete answer:
The correct answer to this question is option A, only intramolecular H-bonding occurs in chloral hydrate, that is \[CC{{l}_{3}}CH{{(OH)}_{2}}\] .
First, we have to understand the difference between intermolecular hydrogen bonding and intramolecular hydrogen bonding.
Intermolecular hydrogen bonding occurs between two same or different kinds of molecule, and intra molecular hydrogen bonding occurs between the atoms of the same molecule.
Thus, let us take a look at the structure of chloral hydrate, that is \[CC{{l}_{3}}CH{{(OH)}_{2}}\] .
As shown in the above figure, the molecule of chloral hydrate comprises carbon, chlorine, hydrogen and oxygen. Carbon is not shown in the figure but it is there between the bonds of chlorines and oxygens.
The dotted line in the above figure shows hydrogen bonding between chlorine and hydrogen. Therefore, the compound chloral hydrate contains an intra molecular hydrogen bond.
Thus, option D, which says the compound does not contain any type of hydrogen bond, gets automatically discarded.
But, the compound does not contain an intermolecular hydrogen bond, thus the answer is option A, chloral hydrate only contains intra molecular hydrogen bond.
Note:
Chlorine does not show hydrogen bonding due to its electron density which comes from the size of its atom. Despite chlorine being highly electronegative, it does not form hydrogen bonding, neither intra nor inter. This example is an exception to that statement, a reason is believed that as the given compound is a geminal diol. Geminal diols are generally unstable compounds, so to make it stable, chlorine might have formed an intramolecular hydrogen bond.
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