organic chemistry midterm chem 221 concordia organic chemistry midterm

CHEM 221 – UNIT 2 Lecture 5: Alkenes and Alkynes  Alkene formula: C Hn 2n  Remember: o Hybrid orbitals: the combination of 2 or more atomic orbitals forms a new set of atomic orbitals. o 3 types: sp , sp , sp o  bond: formed by direct overlap o  bond: formed by parallel overlap o The 3 hybrid sp orbitals orient themselves as far apart as possible, which forms a trigonal planar  Ethane (C H2):4type of alkene o 2 2p ozbitals (parallel) form a  bond o The overlapping sp orbitals form a  bond o The  bond and  bond form a double bond  C-C bonds:  vs  o -bonding is less favourable than -bonding;