6th edition Prob 4.43


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Carissa Young 1K
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Joined: Fri Sep 28, 2018 12:17 am

6th edition Prob 4.43

Postby Carissa Young 1K » Mon Nov 19, 2018 4:03 pm

Why does the bond angle between two hybrid orbital increase
as the s-character of the hybrids is increased?

Matthew Tran 1H
Posts: 165
Joined: Fri Sep 28, 2018 12:16 am

Re: 6th edition Prob 4.43

Postby Matthew Tran 1H » Mon Nov 19, 2018 8:18 pm

A hybrid orbital will have more s-character when there are less p orbitals involved in hybridization (character is just the percentage contribution of the type of orbital to the hybrid). For example, sp3 hybrid orbitals are used for tetrahedral electronic geometries (109.5 degrees), sp2 hybrid orbitals are used for trigonal planar electronic geometries (120 degrees), and sp hybrid orbitals are used for linear electronic geometries (180 degrees). Notice how the bond angles increase as the hybrid orbitals have more s-character ([25%,109.5], [33%,120], [50%,180]).


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