Draw the condensed and skeletal structures for each of the...

Key Concepts

Alkynes

Alkynes are unsaturated hydrocarbons characterized by the presence of at least one carbon–carbon triple bond. Their triple bonds have a linear geometry, which influences both the physical structure and the chemical reactivity of the molecule. This functional group is central to the compounds in the question.

Condensed Structural Formulas

A condensed structural formula expresses the molecular structure in a shorthand notation by writing sequentially the atoms and groups without explicitly drawing all bonds. It emphasizes the connectivity of the atoms, using parentheses to denote branches, and is particularly useful for complex organic molecules.

Skeletal (Line-Angle) Structures

Skeletal structures, or line-angle formulas, simplify the depiction of carbon chains and rings by representing carbon atoms as vertices. The lines denote bonds, and hydrogen atoms attached to carbons are usually omitted, making this a concise and clear method to present an organic molecule’s framework.

IUPAC Nomenclature and Substituent Positioning

IUPAC nomenclature provides a systematic approach to name organic compounds and determine their structure by indicating the positions of functional groups and substituents on the carbon skeleton. Correct numbering and identification of substituents are essential for unambiguously conveying the molecular structure.

Cyclic Alkynes

Cyclic alkynes are compounds in which a carbon–carbon triple bond is incorporated into a ring system. Their cyclic structure often introduces additional strain compared to acyclic alkynes, affecting the molecule’s reactivity and stability, and requires careful consideration when drawing structural representations.

Transcript

00:03 In this question, we are drawing the condensed and skeletal structures for each of the compounds listed.

00:11 So starting with number one, one chloro three hexine.

00:14 So what i'm going to do is draw the condensed structures, and then we'll go back and do the skeletal structures.

00:19 So for number one, the condensed structure, we have three hexine.

00:25 So that's a six carbon alkan with the alkan on carbon three and one chloro.

00:30 So i'm going to go ahead and put that chloro out in front, which i'm going to go ahead and put that chloro.

00:33 Would make carbon 1 a ch2.

00:36 And then, so that's carbon 1, carbon 2, carbon 3 has our triple bond on it, which makes it have no hydrogens.

00:46 Carbon 4 also has no hydrogens, and then carbon 5 and carbon 6.

00:52 So there is our condensed structure for 1chloro3 hexine.

00:56 And then if we want to make this into a skeletal structure, we'll just draw lines instead of reading ch every time.

01:03 So we'll have chlorine on carbon one and then carbon two, carbon three, and then we have our triple bond on there, and that's four, five, six.

01:17 There's our skeletal structure.

01:21 B is cycloctine, so that is an eight -membered ring.

01:27 So one, two, three, four, five, six, seven, eight.

01:34 We have a triple bond.

01:36 In there somewhere.

01:38 And then these guys will have no hydrogens.

01:43 Let's connect everything.

01:46 And then everything else will be a ch2.

01:57 And then if you want to draw the skeletal structure, we'll do that same thing.

02:01 We'll draw an octagon and make one of them a triple bond.

02:10 So c is isopropylosacetylene.

02:12 So acetylene is, looks like this...

Please give Ace some feedback