The optically active compound between c i s − Cr ( acac ) 2 ( H 2 O ) 2 , t r a n s − Cr ( acac ) 2 ( H 2 O ) 2 and Cr ( acac ) 3 is to be identified. Concept introduction: The following are the conditions for the optically active compounds, The compound should not have plane symmetry. The compound should not have center of symmetry. The mirror image of the compound should be non-superimposable. If plane passes through the molecule and the molecule is divided into two equal halves, then the molecule is said to have plane symmetry. Normally, trans complex compounds show plane of symmetry. A point is said to be the center of symmetry, if same molecules are present in the opposite direction to each other. A molecule is said to be non-superimposable, if its mirror image does not overlap each other completely. To determine: The optically active compound between c i s − Cr ( acac ) 2 ( H 2 O ) 2 , t r a n s − Cr ( acac ) 2 ( H 2 O ) 2 and Cr ( acac ) 3 .

Question

1) a) Give the dominant Intermolecular Force (IMF) in a sample of each of the following compounds. Please show your work. (8) SF2, CH,OH, C₂H₂ b) Based on your answers given above, list the compounds in order of their Boiling Point from low to high. (8)

Answer 1

Question

Chapter 21, Problem 49E

Interpretation Introduction

Interpretation: The optically active compound between cis−Cr(acac)2(H2O)2 , trans−Cr(acac)2(H2O)2 and Cr(acac)3 is to be identified.

Concept introduction: The following are the conditions for the optically active compounds,

The compound should not have plane symmetry.

The compound should not have center of symmetry.

The mirror image of the compound should be non-superimposable.

If plane passes through the molecule and the molecule is divided into two equal halves, then the molecule is said to have plane symmetry. Normally, trans complex compounds show plane of symmetry.

A point is said to be the center of symmetry, if same molecules are present in the opposite direction to each other.

A molecule is said to be non-superimposable, if its mirror image does not overlap each other completely.

To determine: The optically active compound between cis−Cr(acac)2(H2O)2 , trans−Cr(acac)2(H2O)2 and Cr(acac)3 .

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