EXAMPLE 4.6 Accounting for the structure of a molecule with
multiple bonds
Formic acid is an important starting material for some polymers. Its structure makes it
useful for the synthesis of strong polymer chains.
Account for the structure of a formic acid molecule, HCOOH, in terms of hybrid
orbitals, bond angles, and - and -bonds. The C atom is attached to an H atom, a
terminal O atom, and an ßOH group.
ANTICIPATE Because the C atom is attached to three atoms, you should anticipate
that its hybridization scheme is sp2 and that one unhybridized p-orbital remains.
PLAN Use the VSEPR model to identify the shape of the molecule and then assign the
hybridization consistent with that shape. All single bonds are -bonds, and multiple
bonds are composed of a -bond and one or more -bonds. Finally, form - and
-bonds by allowing the orbitals to overlap.
EXAMPLE 4.6 Accounting for the structure of a molecule withmultiple bondsFormic acid is an important starting material for some polymers. Its structure makes ituseful for the synthesis of strong polymer chains.Account for the structure of a formic acid molecule, HCOOH, in terms of hybridorbitals, bond angles, and - and -bonds. The C atom is attached to an H atom, aterminal O atom, and an ßOH group.ANTICIPATE Because the C atom is attached to three atoms, you should anticipatethat its hybridization scheme is sp2 and that one unhybridized p-orbital remains.PLAN Use the VSEPR model to identify the shape of the molecule and then assign thehybridization consistent with that shape. All single bonds are -bonds, and multiplebonds are composed of a -bond and one or more -bonds. Finally, form - and-bonds by allowing the orbitals to overlap.
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