Nucleophilic Atom

A nucleophilic atom is an electron-rich atom in a molecule or ion.  Use the following generalizations to identify the most common types of electron-rich atoms.

1. An atom bearing one or more lone pairs but not a formal positive charge is electron-rich.

eg. 1:



eg. 2:



2. A formally neutral atom bearing a partial negative charge is electron-rich.

eg. 1:



eg. 2:



3. A carbon atom not bearing a formal or partial positive charge and multiple-bonded to another carbon atom is electron-rich.

eg. 1:



eg. 2:



see also electrophilic atom, nucleophile, electrophile

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