Structure and Polarity of Molecules Lab Molecular Geometry Charts Basic Structures Total # of e− # of lone e− # of bonding pairs Molecular geometry Bond angles pairs 2 2 0 Linear 180 3 3 0 Trigonal planar 120 3 2 1 Bent <120 4 4 0 Tetrahedral 109.5 4 3 1 Trigonal pyramidal <109.5 4 2 2 Bent <109.5 4 1 3 Linear 180 More Advanced Structures Total # of e− # of lone e− # of bonding pairs Molecular geometry Bond angles pairs pairs 5 5 0 Trigonal bipyramidal 90, 120 5 4 1 See-saw 180, 90, <120 5 3 2 T-shaped 90 5 2 3 Linear 180 6 6 0 Octahedral 90 6 5 1 Square pyramidal <90 6 4 2 Square planar 90 6 3 3 T-shaped 90 6 2 4 Linear 180 For each molecule listed in the box below, use a separate sheet of paper to determine the total number of e− pairs draw the Lewis structure determine the number of bonding e− pairs determine the number of lone e− pairs state the shape of the molecule state whether the molecule is polar or nonpolar. H2 XeF4 N2 C2H5OH CO2 HCN CH3NH2 O2 H2O2 BCl3 IF3 C6H12 CH4 SO3 XeOF4 BH2− HBr SeBr2 Br3− COCl2 H2O PCl3 SeF4 N2F2 acetone NH3 CF4 IF5 C6H6 isopropyl C2H2 AsF5 CH3CH2CH2OCH2CH2CH3 alcohol
Structure and Polarity of Molecules Lab Molecular Geometry Charts Basic Structures Total # of e− pairs # of bonding pairs # of lone e− Molecular geometry Bond angles 2 2 0 Linear 180 3 3 0 Trigonal planar 120 3 2 1 Bent <120 4 4 0 Tetrahedral 109.5 4 3 1 Trigonal pyramidal <109.5 4 2 2 Bent <109.5 4 1 3 Linear 180 More Advanced Structures Total # of e− pairs # of bonding pairs # of lone e− pairs Molecular geometry Bond angles 5 5 0 Trigonal bipyramidal 90, 120 5 4 1 See-saw 180, 90, <120 5 3 2 T-shaped 90 5 2 3 Linear 180 6 6 0 Octahedral 90 6 5 1 Square pyramidal <90 6 4 2 Square planar 90 6 3 3 T-shaped 90 6 2 4 Linear 180 For each molecule listed in the box below, use a separate sheet of paper to determine the total number of e− pairs draw the Lewis structure determine the number of bonding e− pairs determine the number of lone e− pairs state the shape of the molecule state whether the molecule is polar or nonpolar. H2 N2 CO2 O2 CH4 HBr H2O NH3 C2H5OH HCN H2O2 SO3 SeBr2 PCl3 CF4 C2H2 CH3NH2 BCl3 XeOF4 Br3− SeF4 IF5 AsF5 XeF4 IF3 BH2− COCl2 N2F2 C6H6 CH3CH2CH2OCH2CH2CH3 C6H12 acetone isopropyl alcohol
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