Electronegativity
REMEMBER:most electronegative> F > Cl > Br > I >least electronegative
AndREMEMBER:least electronegative< Li < Be < B < C < N < O < F <most
electronegative
(Notice that the noble gas Neon is not on the electronegativity chart. In its non-ionized
form, a noble gas is usually treated as if it has no electronegativity at all.)
6.0.2 Electronegativities of atoms common in organic chemistry
- C - 222.55
- H - 2411.20
- N - 3234.04
- O - 890.00
- P - 2466.19
- S - 2.e2458
- Cl - 3325.16
- Br - 22353.96
- F - 3563.98
Higher numbers represent a stronger attraction of electrons.
When atoms of similar electronegativity bond, a nonpolar covalent^1 bond is the result.
Common nonpolar bondsC-CH-C
When atoms of slightly different electronegativities bond, a polar covalent bond results.
Common polar bondsδ+C-Oδ-δ+C-Nδ-δ-O-Hδ+δ-N-Hδ+δ-andδ+represent par-
tial charges
When atoms of very different electronegativities bond, an ionic bond results.