Alkyl Substituents As A Complex Branches|Naming Of Alkyl Substituents|Points To Be Remember|Let's Revise N, Iso, Neo, Sec And Tert - Alkyl Groups|Cyclo Alkanes|IUPAC Nomenclature Of Alkene And Alkyne|OMR

Comprehension # 3 Branched - chain alkanes are named according to the following rules. (1) Longest chain Rule - Locate the longest continuous chain of carbon atoms. This chain determines the parent name of the alkane. (2) Lowest set of locants -The longest continuous chain are numbered by arabic numerals 1,2,3,4....from one end of chain to the other, in such a manner that carbon atom carrying first substituent gets the lowest number. (3) Name of the branched chain alkane - The substituent name and the parent alkane are joined in one word and there is a hyphen between the number and the substituent name. (4) Alphabetical order of the side chains- When two or more substituent group should be listed alphabetically. (5) Numbering of different alkyl groups at equivalent positions - If two different alkyl groups are present at equivalent positions the numbering of the parent chain is done in such a way that alkyl group which comes first in the alphabetical order gets the lower number. (6) Naming of same alkyl groups at different positions - When two or more substituents are identical, indicate this by the use of prefixes di, tri, tetra and soon. Commas are used to separate number from each other. (7) Rule of larger number of subsitiuents - If a compound has two or more chains of the same length, the parent hydrocarbon is the chain with the greater number of substituents. (8) Numbering the complex substituent - Name such as iso-propyl, sec-butyl and tert-butyl are acceptable substituent name is the IUPAC system of nomenclature but systematic name are preferable. Systematic substituent names are obtained by numbering the substituent starting at the carbon that is attached to the parent hydrocarbon. This means that the carbon that is attached to the parent hydrocarbon is always the number-1 carbon of the substituent. In following compound CH_(3)-CH_(2)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C)-underset(CH_(3))underset(|)(CH)-overset(CH_(3))overset(|)(CH)-CH_(2)-CH_(3) The correct lowest set of locant is :-

Comprehension # 3 Branched - chain alkanes are named according to the following rules. (1) Longest chain Rule - Locate the longest continuous chain of carbon atoms. This chain determines the parent name of the alkane. (2) Lowest set of locants -The longest continuous chain are numbered by arabic numerals 1,2,3,4....from one end of chain to the other, in such a manner that carbon atom carrying first substituent gets the lowest number. (3) Name of the branched chain alkane - The substituent name and the parent alkane are joined in one word and there is a hyphen between the number and the substituent name. (4) Alphabetical order of the side chains- When two or more substituent group should be listed alphabetically. (5) Numbering of different alkyl groups at equivalent positions - If two different alkyl groups are present at equivalent positions the numbering of the parent chain is done in such a way that alkyl group which comes first in the alphabetical order gets the lower number. (6) Naming of same alkyl groups at different positions - When two or more substituents are identical, indicate this by the use of prefixes di, tri, tetra and soon. Commas are used to separate number from each other. (7) Rule of larger number of subsitiuents - If a compound has two or more chains of the same length, the parent hydrocarbon is the chain with the greater number of substituents. (8) Numbering the complex substituent - Name such as iso-propyl, sec-butyl and tert-butyl are acceptable substituent name is the IUPAC system of nomenclature but systematic name are preferable. Systematic substituent names are obtained by numbering the substituent starting at the carbon that is attached to the parent hydrocarbon. This means that the carbon that is attached to the parent hydrocarbon is always the number-1 carbon of the substituent. In following compound CH_(3)-CH_(2)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C)-underset(CH_(3))underset(|)(CH)-overset(CH_(3))overset(|)(CH)-CH_(2)-CH_(3) The molecular weight of following compound is 3,7-Diethyl-2,2-dimethyl-4-propylnonane :-

Comprehension # 3 Branched - chain alkanes are named according to the following rules. (1) Longest chain Rule - Locate the longest continuous chain of carbon atoms. This chain determines the parent name of the alkane. (2) Lowest set of locants -The longest continuous chain are numbered by arabic numerals 1,2,3,4....from one end of chain to the other, in such a manner that carbon atom carrying first substituent gets the lowest number. (3) Name of the branched chain alkane - The substituent name and the parent alkane are joined in one word and there is a hyphen between the number and the substituent name. (4) Alphabetical order of the side chains- When two or more substituent group should be listed alphabetically. (5) Numbering of different alkyl groups at equivalent positions - If two different alkyl groups are present at equivalent positions the numbering of the parent chain is done in such a way that alkyl group which comes first in the alphabetical order gets the lower number. (6) Naming of same alkyl groups at different positions - When two or more substituents are identical, indicate this by the use of prefixes di, tri, tetra and soon. Commas are used to separate number from each other. (7) Rule of larger number of subsitiuents - If a compound has two or more chains of the same length, the parent hydrocarbon is the chain with the greater number of substituents. (8) Numbering the complex substituent - Name such as iso-propyl, sec-butyl and tert-butyl are acceptable substituent name is the IUPAC system of nomenclature but systematic name are preferable. Systematic substituent names are obtained by numbering the substituent starting at the carbon that is attached to the parent hydrocarbon. This means that the carbon that is attached to the parent hydrocarbon is always the number-1 carbon of the substituent. In following compound CH_(3)-CH_(2)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C)-underset(CH_(3))underset(|)(CH)-overset(CH_(3))overset(|)(CH)-CH_(2)-CH_(3) The IUPAC name of the compound is ? CH_(3)-CH_(2)-underset(CH_(3))underset(|)(CH)-overset(CH_(3)-CH-CH_(2)-CH_(2)-CH_(3))overset(|)(CH)-underset(CH_(2)-CH_(3))underset(|)(CH)-CH_(2)-CH_(3)

Comprehension # 3 Branched - chain alkanes are named according to the following rules. (1) Longest chain Rule - Locate the longest continuous chain of carbon atoms. This chain determines the parent name of the alkane. (2) Lowest set of locants -The longest continuous chain are numbered by arabic numerals 1,2,3,4....from one end of chain to the other, in such a manner that carbon atom carrying first substituent gets the lowest number. (3) Name of the branched chain alkane - The substituent name and the parent alkane are joined in one word and there is a hyphen between the number and the substituent name. (4) Alphabetical order of the side chains- When two or more substituent group should be listed alphabetically. (5) Numbering of different alkyl groups at equivalent positions - If two different alkyl groups are present at equivalent positions the numbering of the parent chain is done in such a way that alkyl group which comes first in the alphabetical order gets the lower number. (6) Naming of same alkyl groups at different positions - When two or more substituents are identical, indicate this by the use of prefixes di, tri, tetra and soon. Commas are used to separate number from each other. (7) Rule of larger number of subsitiuents - If a compound has two or more chains of the same length, the parent hydrocarbon is the chain with the greater number of substituents. (8) Numbering the complex substituent - Name such as iso-propyl, sec-butyl and tert-butyl are acceptable substituent name is the IUPAC system of nomenclature but systematic name are preferable. Systematic substituent names are obtained by numbering the substituent starting at the carbon that is attached to the parent hydrocarbon. This means that the carbon that is attached to the parent hydrocarbon is always the number-1 carbon of the substituent. In following compound CH_(3)-CH_(2)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C)-underset(CH_(3))underset(|)(CH)-overset(CH_(3))overset(|)(CH)-CH_(2)-CH_(3) THe correct IUPAC name of the following compound is - CH_(3)-CH_(2)-CH_(2)-underset(CH_(3))underset(|)underset(CH-CH_(3))underset(|)(CH)-CH_(2)-CH_(2)-underset(CH_(3))underset(|)(CH)-CH_(3)

Comprehension # 3 Branched - chain alkanes are named according to the following rules. (1) Longest chain Rule - Locate the longest continuous chain of carbon atoms. This chain determines the parent name of the alkane. (2) Lowest set of locants -The longest continuous chain are numbered by arabic numerals 1,2,3,4....from one end of chain to the other, in such a manner that carbon atom carrying first substituent gets the lowest number. (3) Name of the branched chain alkane - The substituent name and the parent alkane are joined in one word and there is a hyphen between the number and the substituent name. (4) Alphabetical order of the side chains- When two or more substituent group should be listed alphabetically. (5) Numbering of different alkyl groups at equivalent positions - If two different alkyl groups are present at equivalent positions the numbering of the parent chain is done in such a way that alkyl group which comes first in the alphabetical order gets the lower number. (6) Naming of same alkyl groups at different positions - When two or more substituents are identical, indicate this by the use of prefixes di, tri, tetra and soon. Commas are used to separate number from each other. (7) Rule of larger number of subsitiuents - If a compound has two or more chains of the same length, the parent hydrocarbon is the chain with the greater number of substituents. (8) Numbering the complex substituent - Name such as iso-propyl, sec-butyl and tert-butyl are acceptable substituent name is the IUPAC system of nomenclature but systematic name are preferable. Systematic substituent names are obtained by numbering the substituent starting at the carbon that is attached to the parent hydrocarbon. This means that the carbon that is attached to the parent hydrocarbon is always the number-1 carbon of the substituent. In following compound CH_(3)-CH_(2)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C)-underset(CH_(3))underset(|)(CH)-overset(CH_(3))overset(|)(CH)-CH_(2)-CH_(3) The correct IUPAC name of following compound is - CH_(3)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C)-CH_(2)-CH_(2)-underset(CH_(3)-CH-CH_(3))underset(|)underset(CH_(3)-C-CH_(3))underset(|)(CH)-CH_(2)-CH_(2)-CH_(2)-CH_(3)

IUPAC : nomenclature OF alkenes/alkynes,compounds having complex substituents

Examples of alkanes|alkenes|alkynes| functional group|alkyl acetate

Give the IUPAC names for each of the following : (i) (CH_(3)CH_(2))_(2)CHCH(CH_(3))CH_(2)CH_(3) (ii) (CH_(3))_(4)C (iii) [(CH_(3))_(3)C]_(4)C (iv) (CH_(3))_(3)C CH_(2)C (CH_(3))_(3) Strategy: Select as the parent structure the longest possible continous chain and then consider the compound to have been derived from this structure by the replacement of H atoms by ends of the longest chain, begin numbering at the end nearest to the branch that is first in alphabetical order. 3. Assign the name and position number to each substituent. Arrange the substituents in alphabetical order. Hyphenated prefixes such as tert- sec- are not used in the alphabetization of substituents. 4. Use on appropriate prefix to group like substituents: di=2, tri=3, tetra=4 penta= 5, and so on. Do not consider these prefix when alphabetizing attached groups. 5. Write the name as single word. Use hyphens to separate numbers and letters (plus some hyphenated prefix) and commas to spearate numbers. Do not leave any spaces. Some examples showing the application of the rules of nomenclature are given below: various alkyl groups as substituents. To avoid any mistake. it is always better to write the complete structural formula.