Unit 2, Chap 13b

Unit 2, Chap 13b - POLAR COVALENT BONDS The O-H bonds in...

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P OLAR C OVALENT B ONDS The O-H bonds in the water molecule are polar The bond angles in the water molecule are such that the molecule is not symmetrical, so the dipole moments do not cancel each other out Water is very polar
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T HE V ALENCE S HELL E LECTRON P AIR R EPULSION M ODEL (VSEPR) The VSEPR model describes the geometry around a given atom determined by minimizing electron repulsion Electronic geometry- takes into account any region of high electron density (RHED) Each bond (single, double, or triple) is a RHED Each lone pair is a RHED Molecular geometry- the 3-D arrangement of atoms in a molecule without the lone pairs
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RHEDs Electronic Geometry 2 Linear (180°) 3 Trigonal planar (120°) 4 Tetrahedral (109.5°) 5 Trigonal bipyramidal (120° and 90°) 6 Octahedral (90°) VSEPR
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VSEPR Molecular geometry- the 3-D arrangement of atoms in a molecule without the lone pairs To determine the molecular geometry of a molecule Determine the Lewis dot structure
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This note was uploaded on 07/25/2011 for the course CH 301 taught by Professor Fakhreddine/lyon during the Spring '07 term at University of Texas.

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Unit 2, Chap 13b - POLAR COVALENT BONDS The O-H bonds in...

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