CHEM 230 Lecture Notes - Soil Moisture And Ocean Salinity, Electronegativity, Fluoride
2 Mar 2014
School
Department
Course
Professor
Document Summary
+ stable: molecular orbital theory , odd number of bonding es, o2 , vb all es, experiment: paramagnetic, 2 unpaired es, difficulties for more complex molecules, o3 , coordination compounds, benzene, cannot see bond energy levels via spectroscopy. Need for a more sophisticated approach mo theory (a)formation of molecular orbitals: linear combination of atomic orbitals(lcao) (i) single electron molecule: h2. Schrodinger eqn. (in atomic units; 1au 27. 2 ev) Atomic orbitals wave function a and b. 34: ro = 1. 04 , e1min = -269 kj/mol (b) covalent bonding revisited (i) function of the density of probability. 2 antibonding orbital , e2 > eh. Lcao: = ca a + cb b + cc c + . H2: antibonding orbital 2 lower inter-nuclear e- density. (ii) covalent bonding: overlap of atomic orbitals bonding (molecular) orbitals(bos) Over whole molecule delocalized approach: es (c) molecular orbitals, multielectron molecule: (one) ith e- i, bonding es.
