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These molecules are our first examples of central atoms with two lone pairs of electrons

These molecules are our first examples of central atoms with two lone pairs of electrons

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These molecules are our first examples of central atoms with two lone pairs of electrons. Thus, the electronic and molecular geometries are different. Both substituents are the same but molecule is polar. Molecules are angular, bent, or V-shaped and polar. Tetrahedral electronic arrangement: AB 2 U 2 Species (Two Lone Pairs of Electrons on A) Electronic Structures Tetrahedral electronic arrangement: AB 2 U 2 Species (Two Lone Pairs of Electrons on A) shape Tetrahedral electronic arrangement: AB 2 U 2 Species (Two Lone Pairs of Electrons on A) Valence Bond Theory (Hybridization) Tetrahedral electronic arrangement: AB 2 U 2 Species (Two Lone Pairs of Electrons on A) Tetrahedral electronic arrangement:
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Unformatted text preview: ABU 3 Species (Three Lone Pairs of Electrons on A) Linear molecules – only 2 atoms. Neither VSEPR nor VB theory adds to understanding. There may be debate whether the “central” atom is hybridized or unhybridized. Some examples of molecules with this geometry are: HF, HCl, HBr, HI, FCl, Ibr Electronic and molecular geometries are different due to lone pairs. Molecules are linear and polar when the two atoms are different. – Cl 2 , Br 2 , I 2 are nonpolar. Helpful Table for Molecular and Electronic Geometry Formula Regions of Electronic Shape Hybridi- # Lone Polar? Examples high electron geometry zation pairs...
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