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Lecture notes

Molecule Structure

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PDF containing notes from Molecule Structure lesson for A-level chemistry

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University Of Portsmouth (UoP)
Module
Pharmaceutical Chemistry

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Molecule Structure
Created @January 20, 2025 7:35 PM

Class Pharmaceutical Chemistry

Bond Lengths

Nuclear separation distance leads to a stable molecule

Attractive interactions are maximised but equal to repulsive interactions

Bond Trends

Small atoms= shorter bonds

More electrons present in a bond, shorter the bond

Bigger the electronegativity difference with bonded atoms, shorter the
bond



Bond Energy Trends

Bonds become shorter as energy increases

More electrons present increases the bond energy

Bigger the difference in electronegativity in bonded atoms, bigger the
bond energy



Ionic Bonding

Lattices

Formed from ionic compounds

Contains strong electrostatic forces between ions



Molecule Structure 1
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