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Unformatted text preview: lecule is symmetrical and nonpolar. Not all bonded atoms around the central atom are the same. The E is different between the carbon and hydrogen than the E between the carbon and chlorine atoms. Slide 15 Fig. 12-10, p. 335 The molecule is not symmetrical and is polar.
60 61 p.316 62 p.316 Electronic vs. Molecular Geometry
Molecule Lewis Structure RHED Electronic As predicted by RHED Bond Angle Electronic 109.5o Bond Angle Molecular <109.5o NH3 H N H H 4 tetrahedran The lone pair of electrons around the central atom are very repulsive. The N--H bonds are pushed away from the lone pair and the geometry is distorted. The molecular geometry is trigonal pyramidal
63 64 p.322 65 p.322 66 p.322 Electronic vs. Molecular Geometry
Molecule Lewis Structure RHE D Electronic As predicted by RHED Bond Angle Electronic Bond Angle Molecular H2O : OH H 4 tetrahedran 109.5o <109.5o The lone pairs of electrons around the central atom are very repulsive. The O--H bonds are pushed away from the lone pair and the geometry is distorted. The molecular geometry is angular (bent).
67 68 p.325 Electronic vs. Molecular Geometry
Five RHED 69 Five RHED, one lone pair 70 p.329 71 Fig. 8-2, p.330 Six RHED 72 p.331 73 Fig. 8-3, p.333 74 75 76 77 78 79...
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