jdla
01-05-2008, 03:42 PM
Which is stronger a hydrogen bond or double bond?
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View Full Version : Bond Strength? jdla 01-05-2008, 03:42 PM Which is stronger a hydrogen bond or double bond? BloodySurgeon 01-05-2008, 04:06 PM C=C is stronger than C-H intramolecularly however O-H ----- F-H is much stronger intermolecularly. PreMed4Dummies 01-05-2008, 04:06 PM A double bond is actually composed of a sigma and pi covalent bond- these are intramolecular bonds. A hydrogen bond is a strong type of intermolecular bond. However, a covalent bond is much stronger than a hydrogen bond, hence the double bond has greater bond strength. BloodySurgeon 01-05-2008, 04:07 PM [delete] jdla 01-05-2008, 04:08 PM I confused now. Two different answers. PreMed4Dummies 01-05-2008, 04:13 PM If I'm not mistaken, looking at the bond dissociation table on this site for example http://www.science.uwaterloo.ca/~cchieh/cact/c120/bondel.html. It takes 614 kj/mol of energy to break a C=C while it takes 568 kj/mol to break H-F, 366 kj/mol to break O-H, and 391 kj/mol to break H-N. So since it takes greater energy to break C=C, its stronger. Does my reasoning make sense? BloodySurgeon 01-05-2008, 04:14 PM I confused now. Two different answers. same answer... hydrogen bond is an intermolecular bond and C=C is a intramolecular bond so you cant compare unless you mean C-H << C=C but then there is O-H > C-H jdla 01-05-2008, 04:18 PM You guys are saying that double bonds are stronger than hydrogen bonds. jdla 01-05-2008, 04:22 PM Thanks. I understand. |