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Laboratory Experiment 1. Making Ball-and-Stick Models of Hydrocarbon Molecules

Lecture



From the provided set of balls and rods, assemble models of the molecules of methane, ethane, propane, n-butane, and n-pentane.

Laboratory Experiment 1. Making Ball-and-Stick Models of Hydrocarbon Molecules

Video 7.1.
Rotation around
the C—C bond

In alkane molecules, rotation around carbon-carbon bonds occurs easily (video 7.1). Because of this, the carbon chain of alkane molecules can take on various spatial shapes. By rotating around the carbon-carbon bonds, give the ball-and-stick model of the n-pentane molecule the spatial shapes shown in the figure:

Laboratory Experiment 1. Making Ball-and-Stick Models of Hydrocarbon Molecules

Is the sequence in which the atoms are connected in the molecule disrupted during rotation around carbon-carbon bonds? Are the structures shown in the figure isomers?

Assemble ball-and-stick models of the isomers of n-pentane. Can these models be obtained from the model of n-pentane by rotation around carbon-carbon bonds?

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Lectures and tutorial on "organic-chemistry"

Terms: organic-chemistry