Answer. The presence of acid improves the leaving capacity of the hydroxyl group and enables its substitution with an alkoxyl group (-OR).

The compounds in which two or three hydroxyl groups are attached to the same carbon atom are unstable and lose water to give aldehydes, ketones, or carboxylic acids. Acetals are products of substitution reactions catalyzed by acid.

C. Ambiguous. Weekly acidic. A geminal diol has two hydroxyl groups bonded to the same atom.

Explanation for the correct answer: Option (b) is given as hydroxyl. Ask for details ; Follow Report by Jaindrasingh3229 27.10.2018 Log in to add a comment

As mentioned, a large part of the action caused by the hydroxyl group is due to the electronegativity of the oxygen. The primary reason involves the relative stability of the two molecules.DNA is more chemically stable than RNA because it lacks the hydroxyl group on the 2' carbon. These species arise by hydration of the carbonyl compounds. November 22, 2019 Toppr.

enol Two functional groups attached to the same carbon.

True. Mixing the two reactants together produces the hemiacetal. Another example is (F 3 C) 2 C(OH) 2, the hydrated form of hexafluoroacetone.

Additionally the deoxyribose sugar in DNA is much less reactive than the ribose sugar in RNA. The hydration is usually unfavorable, but a notable exception is formaldehyde which, in water, exists in equilibrium with methanediol H 2 C(OH) 2. November 22, 2019 Musaf Karkera. carbon atom.

A. And the final compound that I am not sure about is when there are two hydroxyl groups attached to the carbon as well as an oxygen with a double bond. This substance is unstable, as it has two hydroxyl groups on the same carbon atom. B.

This kind of compounds automatically transform into ketones, releasing one molecule of water. This will normally mean that the hydroxyl group is joined to the same carbon atom as a branch. On the other hand, important biomolecules can be modified by the introduction of oxygen atoms by means of non-oxidative hydroxyl radicals. Why presence of more than 1 hydroxyl groups on the same carbon atom makes the molecule(of which the carbon atom is a part)unstable?

In a vicinal diol, the two hydroxyl groups occupy vicinal positions, that is, they are attached to adjacent atoms. Because of that hydroxyl group on the 2' carbon sugar ... Nucleic acids are directional, meaning that there are two different ends. However, clinical trials with such antioxidants as ascorbic acid and vitamin E, failed to produce the expected beneficial results. What functional groups define the two different ends of a DNA strand? So, I doubt this would even exist.

hemiacetal Two functional groups attached to the same carbon. These compounds are called glycols. The conversion of a hemiacetal to an acetal is an S N 1 reaction. Why two hydroxyl groups cannot present in.Same carbon group?

D. None of the above. I think it is hydroxymethanoic acid, but I am not completely sure. Why is RNA more reactive and unstable than DNA: Definition. Note : If two or more hydroxyl groups attached to same carbon atom, the compound is usually unstable and lose a molecule of water to give a stable and therefore two or more hydroxyl groups must be present on different carbon atoms. divided into 2 groups based on the position of the hydroxyl group on the chiral carbon furthest from the carbonyl carbon D (dextro) isomer if the hydroxyl group on the most distant chiral carbon is to the right This chapter discusses the glycol compounds, in which two hydroxyl groups are attached to different carbon atoms and their derivatives, in which one or both of the hydroxyl groups are alkylated to form ethers, esterified with organic or inorganic acids, or replaced by thiol or amino groups.

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