1.6 VSEPR

a2026-02-24 19:39

Status: #new

Tags: #chemistry #cram #molecules

VSEPR

About VSEPR

VSEPR stands for
- Valence Shell Electron Pair Repulsion

Steric Numbers

The Steric Number is = to the num of bonds and lone pairs around the central atom
- ie. $O = C = O$ has a steric number of 2

Steric Number VSEPR shapes

Some Observations:
- 0 lone paid = S (non-polar)
- 1 or more lone paid = NS (polar)

Exceptions

Boron Trifluoride

150

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Excalidraw Data

Text Elements

F
F
B
F

- This is a violation to the octet rule, as Boron has 6 $e^{-}$

Violation to octet rule

A $e^{-}$ less than 8 or higher than 8
- Generally higher than 8 is easier to work with :0

References

1.4 Electron Properties
1.5 Metallic, Covalent Bonds and Polarity