HANDOUT-VSEPR

HANDOUT-VSEPR - See Saw (SF 4 ) yes XY 3 E 2 3 2 5 trigonal...

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Chem102A, Section 03: Handout for VSEPR VSEPR structures Molecule a bonded Lone Steric electron pair Nuclear geometry or or ion atoms pairs number b geometry Molecular geometry Dipole moment D LP SN=D+LP (example) ___________ A. Molecules without lone pairs of electrons on central atom: XY 2 2 0 2 linear Linear (CO 2 ) no XY 3 3 0 3 trigonal planar Trigonal planar (BF 3 ) no XY 4 4 0 4 tetrahedral Terahedral (CH 4 ) no XY 5 5 0 5 trigonal bipyramid Trigonal bipyramid (PF 5 ) no XY 6 6 0 6 octahedral Octahedral (SF 6 ) no B. Molecules with lone pairs of electrons on central atom: XY 2 E 2 1 3 trigonal planar Bent (SO 2 ,O 3 ) yes XY 3 E 3 1 4 tetrahedral Trigonal pyramid (NH 3 ) yes XY 2 E 2 2 2 4 tetrahedral Bent (H 2 O) yes XY 4 E 4 1 5 trigonal bipyramid
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Unformatted text preview: See Saw (SF 4 ) yes XY 3 E 2 3 2 5 trigonal bipyramid T-shape (ClF 3 ) yes XY 2 E 3 2 3 5 trigonal bipyramid Linear (XeF 2 ) no XY 5 E 5 1 6 octahedral Square pyramid (IF 5 ) yes XY 4 E 2 4 2 6 octahedral Square planar (XeF 4 ) no .......................................................................................................... a X=central atom; Y=atom bonded to central atom; E=lone pair of electrons on central atom b Steric number= number of bonded atoms + number of lone pairs of electrons on central atom...
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