CHEM 1124Q Midterm: CHEM 1124Q - Term Test 3 - 2018Winter
Document Summary
Number of electron domains and hybrid orbitals on central atom. Determine the hybridization for the central atom in clp 5. Valence bond theory and hybridization can be used to describe the bonding in molecules containing double and triple bonds. A sigma ( ) bond forms when sp 2 hybrid orbitals on the c atoms overlap. In a sigma bond, the shared electron density lies directly along the internuclear axis. The ethylene molecule contains five sigma bonds: 1 between the two carbon atoms ( sp 2 and sp 2 overlap) 4 between the c and h atoms ( sp 2 and 1 s overlap) The remaining unhybridized p orbital is perpendicular to the plane in which the atoms of the molecule lie. The unhybridized p orbitals overlap in a sideways fashion to form a pi ( ) bond . Sigma bonds exhibit free rotation around the bond axis. Pi bonds restrict free rotation around the bond axis.
