Strong Chemical Bonds
| Typical bond lengths in pm and bond energies in kJ/mol. |
||
| Bond | Length (pm) |
Energy (kJ/mol) |
|---|---|---|
| H — Hydrogen | ||
| H–H | 74 | 436 |
| H–O | 96 | 366 |
| H–F | 92 | 568 |
| H–Cl | 127 | 432 |
| C — Carbon | ||
| C–H | 109 | 413 |
| C–C | 154 | 348 |
| C–C= | 151 | |
| =C–C≡ | 147 | |
| =C–C= | 148 | |
| C=C | 134 | 614 |
| C≡C | 120 | 839 |
| C–N | 147 | 308 |
| C–O | 143 | 360 |
| C–F | 134 | 488 |
| C–Cl | 177 | 330 |
| N — Nitrogen | ||
| N–H | 101 | 391 |
| N–N | 145 | 170 |
| N≡N | 110 | 945 |
| O — Oxygen | ||
| O–O | 148 | 145 |
| O=O | 121 | 498 |
| F, Cl, Br, I — Halogens | ||
| F–F | 142 | 158 |
| Cl–Cl | 199 | 243 |
| Br–H | 141 | 366 |
| Br–Br | 228 | 193 |
| I–H | 161 | 298 |
| I–I | 267 | 151 |
Strong chemical bonds are the intramolecular forces which hold atoms together in molecules. A strong chemical bond is formed from the transfer or sharing of electrons between atomic centers and relies on the electrostatic attraction between the protons in nuclei and the electrons in the orbitals. Although these bonds typically involve the transfer of integer numbers of electrons (this is the bond order, which represents one transferred electron or two shared electrons), some systems can have intermediate numbers of bonds. An example of this is the organic molecule benzene, where the bond order is 1.5 for each carbon atom, meaning that it has 1.5 bonds (shares three electrons) with each one of its two neighbors.
The types of strong bond differ due to the difference in electronegativity of the constituent elements. A large difference in electronegativity leads to more polar (ionic) character in the bond.
Read more about this topic: Chemical Bond
Famous quotes containing the words strong, chemical and/or bonds:
“Even if fathers are more benignly helpful, and even if they spend time with us teaching us what they know, rarely do they tell us what they feel. They stand apart emotionally: strong perhaps, maybe caring in a nonverbal, implicit way; but their internal world remains mysterious, unseen, “What are they really like?” we ask ourselves. “What do they feel about us, about the world, about themselves?””
—Augustus Y. Napier (20th century)
“We are close to dead. There are faces and bodies like gorged maggots on the dance floor, on the highway, in the city, in the stadium; they are a host of chemical machines who swallow the product of chemical factories, aspirin, preservatives, stimulant, relaxant, and breathe out their chemical wastes into a polluted air. The sense of a long last night over civilization is back again.”
—Norman Mailer (b. 1923)
“Oh! I have slipped the surly bonds of earth,
And danced the skies on laughter-silvered wings ...
And while with silent lifting mind I’ve trod
The high, untrespassed sanctity of space,
Put out my hand and touched the face of God.”
—John Gillespie Magee (c. 1922–1941)