Step 1: Carbon (EN = 2.5) is less electronegative than oxygen (EN = 3.5) so C is the central atom.
Step 2: The total number of valence electrons:
Group Valence Electrons
C 4A 1 × 4 e– = 4 e–
H 1A 4 × 1 e– = 4 e–
O 6A 1 × 6 e– = 6 e–
Total: 14 valence e–
Step 3: O prefers 2 bonds. The complete Lewis structure of CH3OH is:
Determine the electron geometry, molecular geometry and polarity around the O of CH3OH .
a) eg=tetrahedral, mg=bent, polar
b) eg=linear, mg=linear, polar
c) eg=trigonal bipyramidal, mg=trigonal planar, nonpolar
d) eg=tetrahedral, mg=linear, nonpolar
e) eg=octahedral, mg=square planar, nonpolar
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