Chapter 1.8: Resonance
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Define contributing structures (resonance structures or resonance contributors)
representations of a molecule or ion that differ only in the distribution of valence electrons
Define double-headed arrows
a symbol used to show that structures on either side of it are resonance-contributing structures
What is a theory that many molecules and ions are best described as a hybrid of several Lewis structures?
resonance
Define resonance
a theory that many molecules and ions are best described as a hybrid of several Lewis structures
Describe the preference order for contributing structures
o Preference 1: Filled Valence Shell o Preference 2: Max number of covalent bonds o Preference 3: Least separation of unlike charges o Preference 4: Negative charge on a more electronegative atom
Define resonance hybrid
a molecule, ion, or radical described as a composite of a number of contributing structures
What are representations of a molecule or ion that differ only in the distribution of valence electrons?
contributing structures (resonance structures or resonance contributors)
What is a symbol used to show that structures on either side of it are resonance-contributing structures?
double-headed arrow
What is a molecule, ion, or radical described as a composite of a number of contributing structures?
resonance hybrid