Hybridization ofAtomic Orbitals PGCC CHM 101 Sinex
Illustrating hybridization Shockwave animation of hybridization click here Chime site with atomic and hybrid orbitals click here Now let’s make some bonds!
s bond remaining p orbitals from sp or sp2
p bond hinders rotation about the carbon-to-carbon bond Planar molecule (each carbon is trigonal planar) with p cloud above and below the plane formation of p bond
end-to-end side-to-side Bond formation from hybridization • Single bond - sigma bond • Double bond – sigma bond + pi bond • Triple bond – sigma bond + pi bond + pi bond How are the two pi bonds in the triple bond oriented?
How about the electron density around a carbon-carbon bond? Polar or Non-polar C2H4 C2H6 C2H2 H+ attack? single bond double bond triple bond Spartan 02
What is the hybridization in each carbon atom? 4 2 5 6 3 7 1 sp3 – 2, 5 tetrahedral sp2 – 1, 3, 4 trigonal planar sp – 6, 7 linear
H H H .. .. .. H:C:C:::C:H C::C::C .. .. .. H H H Draw the Lewis dot structure – C3H4 Remember to chain the carbon atoms and fill the octet of the center carbon atom in the chain first. You should have come up with one of these structures: Build the molecular model.
What is the hybridization? Allene, H2C=C=CH2 The p clouds of the two double bonds are oriented perpendicular to each other. Hence the hydrogens are turned 90o.The is due to the original orientation of the p orbitals on the center carbon atom. Spartan 02