IUPAC name of the compound CH₃—CH—OCH₃ is  _______________ .

                                                                       |

                                                                      CH3

I. 1-methoxy-1-methylethane

II. 2-methoxy-2-methylethane

III. 2-methoxypropane

IV. isopropylmethyl ether 

This is a multiple choice answer as classified in NCERT Exemplar

(II) 2-methoxy-2-methylethane

IUPAC provides consistency to the names of organic compounds. It enables every compound to possess a unique name, which otherwise is not plausible with the common names. The chemical structure of the given compound is shown below:

The given compound is an alkane so suffix in our case will be –ane. An ether functional group is also present so prefix will be Alkoxy-.

To determine the name of a compound, identify the longest and continuous chain of carbon containing the functional group and count the number of carbon atoms in the chain as sho

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This is a multiple choice answer as classified in NCERT Exemplar

(II) 2-methoxy-2-methylethane

IUPAC provides consistency to the names of organic compounds. It enables every compound to possess a unique name, which otherwise is not plausible with the common names. The chemical structure of the given compound is shown below:

The given compound is an alkane so suffix in our case will be –ane. An ether functional group is also present so prefix will be Alkoxy-.

To determine the name of a compound, identify the longest and continuous chain of carbon containing the functional group and count the number of carbon atoms in the chain as shown in the table below.

In the given compound, the number of carbon atoms in the longest chain is 2. That means the prefix of alkane in our case is eth-.

Numbering of the carbons in the longest chain of carbon (Remember that If the organic molecule is not an alkane (and has a functional group) you have to initiate numbering such that the functional group is placed on the carbon having the lowest possible number).

In the given compound, we can number as shown below:

In the given compound, either the group and methyl group present on the second carbon will be treated like a branched group. It will be written as 2-methyl methoxy before the main chain name.

Finally, combine the elements of the compound name in the specified order as: branched groups, prefix, suffix according to the functional group and its location along the longest carbon chain.

Therefore, the given compound will have IUPAC name as: 2-methyl methoxy ethane.

Hence, the correct answer is Option (B), the IUPAC name of the given compound is 2-Methyl methoxy ethane. 

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<p><span data-teams="true">This is a multiple choice answer as classified in NCERT Exemplar</span></p><p> (II) 2-methoxy-2-methylethane</p><p>IUPAC provides consistency to the names of organic compounds. It enables every compound to possess a unique name, which otherwise is not plausible with the common names. The chemical structure of the given compound is shown below:</p><div><div><picture><source srcset="https://images.shiksha.com/mediadata/images/articles/1746524305phpl8hQaV_480x360.jpeg" media=" (max-width: 500px)"><img src="https://images.shiksha.com/mediadata/images/articles/1746524305phpl8hQaV.jpeg" alt="" width="150" height="150"></picture></div><div><p>The given compound is an alkane so suffix in our case will be –ane. An ether functional group is also present so prefix will be Alkoxy-.</p><p>To determine the name of a compound, identify the longest and continuous chain of carbon containing the functional group and count the number of carbon atoms in the chain as shown in the table below.</p><p>In the given compound, the number of carbon atoms in the longest chain is 2. That means the prefix of alkane in our case is eth-.</p><p>Numbering of the carbons in the longest chain of carbon (Remember that If the organic molecule is not an alkane (and has a functional group) you have to initiate numbering such that the functional group is placed on the carbon having the lowest possible number).</p><p>In the given compound, we can number as shown below:</p><div><div><picture><source srcset="https://images.shiksha.com/mediadata/images/articles/1746524363phpuu2QpH_480x360.jpeg" media=" (max-width: 500px)"><img src="https://images.shiksha.com/mediadata/images/articles/1746524363phpuu2QpH.jpeg" alt="" width="257" height="128"></picture></div><div><p>In the given compound, either the group and methyl group present on the second carbon will be treated like a branched group. It will be written as 2-methyl methoxy before the main chain name.</p><p>Finally, combine the elements of the compound name in the specified order as: branched groups, prefix, suffix according to the functional group and its location along the longest carbon chain.</p><p>Therefore, the given compound will have IUPAC name as: 2-methyl methoxy ethane.</p><p>Hence, the correct answer is Option (B), the IUPAC name of the given compound is 2-Methyl methoxy ethane.&nbsp;</p></div></div></div></div>

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