CHEM 2301 Chapter Notes - Chapter 10: Trigonal Planar Molecular Geometry, Sigma Bond, Pi Bond
Document Summary
Internal have it anywhere not at the end. Terminal have the bond at the end. Double bond has a sigma and a pi bond. Each c of the double bond is sp2 hybridized and trigonal planar. Pi bond is much weaker than sigma bond making it more easily broken. Stability - trans are generally more stable than cis. Stability increases as number of r groups on double bond increases. Cycloalkenes with less than 8 c are cis. Trans cycloalkenes needs to be long to reduce strain. There are unsaturated because they have fewer than the max number of hs per c. Each pi bond or ring removes 2 h atoms and is 1 degree of unsaturation. Compare actual to max number of h for degrees of unsaturation. A halogen is equivalent to one more h. A n is equivalent to one fewer h.
