##############################CEM
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CEM 141_ VSEPR.pdf#######################################################################################
141_ VSEPR.pdfCEM 141_ VSEPR.pdf#############################################
CEM 141: VSEPR
= the geometry of the molecule - ANS-Shape does not always
an element forming an unusual # of bonds - ANS-Can tell if something has a formal charge if
angle of 109, sp^3 - ANS-Tetrahedral
angle of 120, sp^2 hybridization - ANS-Trigonal planar
Angle of 180, sp hybridization - ANS-Linear shape
are counted as one center of e- density - ANS-Multiple bonds in VSEPR
bent - ANS-Tetrahedral with two free pairs, shape?
bent, angle = 120 - ANS-Trigonal planar with free pair, shape?
comparison method, keep count of e- - ANS-Formal charge
FC = Valence e- on free atom - # of bonds - non-bonded electrons - ANS-Formal charge
equation
Geometry - count all bonds and free pairs
Shape - count only bonds - ANS-Geometry vs shape
helps us figure out shape of molecule through lewis structure
- assume all centers of e- density repel each other
- minimum energy arrangement that the atom will naturally take up - ANS-What does VSEPR
do?
lewis structure --> hybridization --> geometry --> shape - ANS-Process to determine the shape
opposing formal charge groups - ANS-Transisomer
same side formal charge groups - ANS-Cysisomer
trigonal pyramidal - ANS-Tetrahedral with one free pair, shape?
valence shell electron pair repulsion theory - ANS-What does VSEPR stand for?
######################################################################################!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!Q
CEM 141_ VSEPR.pdf####################################################################################CE
######################################################################################!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!Q
CEM 141_ VSEPR.pdf#######################################################################################
141_ VSEPR.pdfCEM 141_ VSEPR.pdf#############################################
CEM 141: VSEPR
= the geometry of the molecule - ANS-Shape does not always
an element forming an unusual # of bonds - ANS-Can tell if something has a formal charge if
angle of 109, sp^3 - ANS-Tetrahedral
angle of 120, sp^2 hybridization - ANS-Trigonal planar
Angle of 180, sp hybridization - ANS-Linear shape
are counted as one center of e- density - ANS-Multiple bonds in VSEPR
bent - ANS-Tetrahedral with two free pairs, shape?
bent, angle = 120 - ANS-Trigonal planar with free pair, shape?
comparison method, keep count of e- - ANS-Formal charge
FC = Valence e- on free atom - # of bonds - non-bonded electrons - ANS-Formal charge
equation
Geometry - count all bonds and free pairs
Shape - count only bonds - ANS-Geometry vs shape
helps us figure out shape of molecule through lewis structure
- assume all centers of e- density repel each other
- minimum energy arrangement that the atom will naturally take up - ANS-What does VSEPR
do?
lewis structure --> hybridization --> geometry --> shape - ANS-Process to determine the shape
opposing formal charge groups - ANS-Transisomer
same side formal charge groups - ANS-Cysisomer
trigonal pyramidal - ANS-Tetrahedral with one free pair, shape?
valence shell electron pair repulsion theory - ANS-What does VSEPR stand for?
######################################################################################!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!Q
CEM 141_ VSEPR.pdf####################################################################################CE