For each of the following molecules, indicate the bond angle...

For each of the following molecules, indicate the bond angle expected between the central atom and any two adjacent chlorine atoms.
a. $\mathrm{Cl}_{2} \mathrm{O}$
b. $\mathrm{CCl}_{4}$
c. $\mathrm{BeCl}_{2}$
d. $\mathrm{BCl}_{3}$

Key Concepts

VSEPR Theory

Valence Shell Electron Pair Repulsion (VSEPR) theory predicts the geometry of molecules based on the mutual repulsion between electron pairs in the valence shell of the central atom. The arrangement that minimizes repulsion determines the molecular shape and the bond angles between the atoms.

Molecular Geometry

Molecular geometry refers to the three-dimensional arrangement of atoms within a molecule. It is determined by both the number of bonding pairs and lone pairs around the central atom, and it directly influences the bond angles between atoms.

Lone Pair Effects

Lone pairs, or non-bonding pairs of electrons, occupy more space around the central atom than bonding pairs. This extra repulsion forces bonding pairs slightly closer together than the idealized angles predicted by simple electron pair counting, altering the bond angles in the molecule.

Hybridization

Hybridization is the mixing of atomic orbitals to form new hybrid orbitals that can form bonds with other atoms. The type of hybridization (such as sp, sp2, or sp3) dictates the ideal bond angles in a molecule and helps in predicting the molecular geometry.

Bond Angle Deviations

Bond angle deviations occur when the observed angles between adjacent atoms differ from the idealized values predicted by simple geometric shapes. These deviations are mainly due to the presence of lone pairs, differences in electronegativity, and the inherent repulsion between different types of electron pairs.

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