Draw structures corresponding to the following IUPAC names: (a) 2 -Chloro-3,3-dimethylhexane (b)

Draw structures corresponding to the following IUPAC names:...

Key Concepts

Cyclic Compound Nomenclature

For cyclic compounds, the IUPAC rules adapt to account for the ring structure. Numbering starts at a substituent with priority and follows the ring in a way that assigns the lowest possible locants to substituents. Special prefixes, such as isopropyl or tert-butyl, may also be used when naming substituted rings.

Multiple Substituent Handling

When a molecule has more than one substituent, it’s necessary to account for each by providing locants and ensuring that substituent prefixes are properly ordered. This includes handling cases such as di-, tri-, and other multipliers and positioning multiple groups on the same carbon atom.

Longest Chain Identification

Identifying the longest continuous carbon chain is crucial in drawing a structure from an IUPAC name because it sets the skeleton of the molecule. The chain determines the base name and serves as the reference point for numbering substituents.

IUPAC Nomenclature

IUPAC nomenclature is the systematic method used to name chemical compounds and describes molecules unambiguously. This system uses defined rules to identify the longest carbon chain, assigns priority and locants to substituents, and orders names according to established conventions.

Substituent Identification and Locants

Substituents are groups attached to the main carbon chain, and locants are the numbers assigned to show their positions on the chain. Correctly mapping substituents (like chloro, bromo, methyl, and isopropyl) ensures that the molecule’s structure reflects its name accurately.

Transcript

00:01 Okay, so for this question, we have four different iupac names here that i've typed down beforehand.

00:08 So we can see here for this first one, we have two, three, dichloro for methyl hexane.

00:15 At first, it's pretty daunting, but if we just look at this root here, this will tell us what we need to know for our base of our compound.

00:23 So we go one, two, three, four, five, six.

00:28 So there's our hexane.

00:29 Now we have to look.

00:30 At okay is it going to be two three so we have two here from the dye in front and then we have chloro here as our root so it's basically saying that we have two chlorines on the second and the third carbons here so we'll put a chlorine there and a chlorine here so here's our corin and then on our fourth carbon here you can see that we have a methyl.

01:06 So our methyl is just one, one carbon, nothing too fancy there.

01:12 So we have one, two, three for a dichloro.

01:16 Then on our fourth carbon here, so one, two, three, four, we have a methyl.

01:22 And there's the structure for this iupac name.

01:26 Moving on to the next one, once again, we want to look at the root.

01:30 So the root here is hexane, same thing, so one, two, three, four, five, six.

01:38 Same here and same here.

01:40 So here, i always start from the front side and then work backwards after i have my root.

01:47 So here we have, on our fourth carbon, we have one, two, three, four, we have a bromine here, right here.

01:55 So we'll put a stick upwards and put our bromine here.

01:59 I'm going to put my halides in red, just so they stand out a little bit more.

02:05 And also on our fourth one, we have an ethyl.

02:08 So ethyl is basically instead of methyl, methyl means one carbon, ethyl means two.

02:15 Nothing too fancy about the name so we can just kind of stick it on like that.

02:19 You know, sometimes you have to put the one of wedges and dashes to show what's in front and what's in behind of this main structure here, but that's only whenever we get to like sis, trans, or r and s.

02:33 We don't have any of that so we can just stick it on like this.

02:38 And then on our second, we have one methyl here, so one carbon.

02:42 So one, two, we'll stick that upwards like that.

02:46 So that's the iupac.

02:47 That's a structure for this iupac name.

02:50 Moving on to this one, we have pentane as our root here.

02:53 So let me underline that.

02:55 We also have ioto, which is iodine instead of bromine or chlorine.

03:01 And then we have a tetra methyl here.

03:04 So that's why we have 2 -2 -4.

03:07 So we have four different numbers for where these four metals are going to go.

03:11 So we go 1, 2, 3, 4, 5.