Molecule Shapes and Intermolecular Forces of Attraction

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10 Terms

1
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Linear shape

2 branches, sp, 180 degrees

Ex. BeH2, HCN, & CO2

2
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Trigonal planar shape

Three branches, sp², 120 degrees

Ex. BF2 & H2CO

3
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Tetrahedral Shape

4 branches, sp³, 109.5 degrees

Ex. CH4

4
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Pyramidal Shape

Four branches, sp³, 107 degrees

Ex. NH3

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Bent Shape

Four branches, sp³, 104.5

Ex. H2O

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Dipole-Dipole attraction

Molecule with positive and negative region due to uneven distribution of electrons, positive and negative ends of different molecules attract

7
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Hydrogen Bond

Hydrogen Bonding is FON, higher melting point and boiling point of compounds

8
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Van Dee Waals/London Dispersion Forces

The force of attraction between NONPOLAR molecules, symmetric charge distribution and diatomics

9
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Molecule - Ion Attraction

Polar molecule attraction to an ion

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What is the order of IFA strengths?

Strongest to weakest: Molecule-ion, H-bonding, Dipople-Dipole, Van Der Waals