Question:
Which of the following is the correct order of priority of group in D-glyceraldehyde?
Which of the following is the correct order of priority of group in D-glyceraldehyde?
Updated On: Apr 29, 2024
- $OH(1), CH0(2), CH_2 0H(3) \, and \, H(4)$
- $OH(1), CH_2 0H(2), CH0(3) \, and \, H(4)$
- $CH_2 0H(1) , CHO(2), OH(3), \, and \, H(4)$
- $ CHO(1) , OH(2),CH_2 0H(3) \, and \, H(4)$
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The Correct Option is A
Solution and Explanation
The structure of D-glyceraldehyde is as .The priority of groups is decided by the following rules
(i) Atom having higher atomic number gets higher priority.
(ii) If the priority cannot be decided by ruie I then the next atoms are considered for priority assignment.
(iii) Where there is a = bond or $\equiv$ bond both atoms are
$ \, \, \, \, $considered to be duplicated or triplicated .$(-\overset {|^{H}} {c}\equiv0$ has
$ \, \, \, \, $higher priority than --$CH_2 0H).$ Hence, the corret order
$ \, \, \, \, $of priority of group in D-glyceraldehyde is as :
$ \, \, \, \, \, $ $OH(1), CH0(2), CH_2 0H(3) \, and \, H(4)$
(i) Atom having higher atomic number gets higher priority.
(ii) If the priority cannot be decided by ruie I then the next atoms are considered for priority assignment.
(iii) Where there is a = bond or $\equiv$ bond both atoms are
$ \, \, \, \, $considered to be duplicated or triplicated .$(-\overset {|^{H}} {c}\equiv0$ has
$ \, \, \, \, $higher priority than --$CH_2 0H).$ Hence, the corret order
$ \, \, \, \, $of priority of group in D-glyceraldehyde is as :
$ \, \, \, \, \, $ $OH(1), CH0(2), CH_2 0H(3) \, and \, H(4)$
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Concepts Used:
Biomolecules
Biomolecules are the most essential organic molecules, which are involved in the maintenance and metabolic processes of living organisms. These non-living molecules are the actual foot-soldiers of the battle of sustenance of life.
There are four major classes of Biomolecules – Carbohydrates, Proteins, Nucleic acids and Lipids.
- Carbohydrates are chemically defined as polyhydroxy aldehydes or ketones or compounds which produce them on hydrolysis.
- Proteins are another class of indispensable biomolecules, which make up around 50per cent of the cellular dry weight. Proteins are polymers of amino acids arranged in the form of polypeptide chains. The structure of proteins is classified as primary, secondary, tertiary and quaternary in some cases.
- Nucleic acids refer to the genetic material found in the cell that carries all the hereditary information from parents to progeny. There are two types of nucleic acids namely, deoxyribonucleic acid (DNA) and ribonucleic acid (RNA). The main function of nucleic acid is the transfer of genetic information and synthesis of proteins by processes known as translation and transcription.
- Lipids are organic substances that are insoluble in water, soluble in organic solvents, are related to fatty acids and are utilized by the living cell.