For each molecule (a)(f), indicate how many different

Chapter , Problem 9.3

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QUESTION:

For each molecule (a)(f), indicate how many different electron-domain geometries are consistent with the molecular geometry shown. [Section 9.2] (a) (b) (c) (e) (f) (d) (e) (f)

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QUESTION:

For each molecule (a)(f), indicate how many different electron-domain geometries are consistent with the molecular geometry shown. [Section 9.2] (a) (b) (c) (e) (f) (d) (e) (f)

ANSWER:

Problem 9.3EVisualizing ConceptsFor each molecule (a)–(f), indicate how many different electron- domain geometries areconsistent with the molecular geometry shown. [Section]Solution 3E:Here, we have to determine how many electron- domain geometries are consistent with themolecular geometry for each moleculeStep 1:Valence shell electron pair repulsion (VSEPR) theoryIt is based on the electron groups surround the central atom (lone pairs, single bonds, multiplebonds, and single electrons). The number of electron groups is determined from the Lewisstructure of the molecule. The geometry of the molecule is dependent on the repulsions betweenelectron groups on interior atoms of a molecule that determine the angle and geometry of themolecule.Lone pair–lone pair > lone pair–bonding pair > bonding pair–bonding pair\nTherefore, the bond angles can vary from the predicted angles because double and triple bondsoccupy more space than single bonds and lone pairs occupy more space than bonding groups.Hence, the presence of lone pairs make the bond angles smaller than the ideal angle for theparticular geometry. Electron Group Electron Bonding Lone pair Molecular geometry electrons electrons geometry 2 Linear 2 0 Linear 3 Trigonal planar 3 0 Trigonal planar Trigonal planar 2 1 Bent 4 Tetrahedral 4 0 Tetrahedral Tetrahedral 3 1 Trigonal pyramidal Tetrahedral 2 2 Bent 5 Trigonal 5 0 Trigonal bipyramidal bipyramidal Trigonal 4 1 SeeSaw bipyramidal Trigonal 3 2 T-shape bipyramidal 6 Octahedral 6 0 Octahedral Octahedral 5 1 Square pyramidal Octahedral 4 2 Square planar

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