Linear combination of tomic orbitals

1. LINEAR COMBINATION OF
ATOMIC ORBITALS (L.C.A.O).
COURSE:REVIEWOFQUANTUMMECHANICSANDE.M.T
CODE:612
COURSEINSTRUCTOR:ASSISTANTPROFESSORDR.P.THANGADURAI.
PRESENTED BY :
ROOPAVATH UDAY KIRAN
M.Tech1st YEAR , sem-1.

2. Introduction
•Ifanelectroncanbefoundinanatomicorbital
belongingtoatomAandalsoinanatomicorbital
belongingtoatomB,thentheoverallwave
functionisasuperpositionofthetwoorbitals.
•Thetechnicaltermforsuperpositionintheabove
equationisalinearcombinationofatomic
orbitals.
•Theapproximatemolecularorbitalformedfroma
linearcombinationofatomicorbitalsiscalleda
LCAO-MO.

4. •Thelower-energyorbital,whichhastheform
iscalledabondingorbital.
•Thehigherenergyorbital,whichhastheform
• iscalledAntibondingorbital
•Anantibondingorbitalismoreantibonding
thanabondingorbitalisbonding.