VB workshop tutorials program

Instructors

• Benoît Braida
• Zhenhua Chen
• Xun Chen
• David Danovich
• Stéphane Humbel (coordinator)
• Mathieu Linares
• Yirong Mo
• Avital Shurki
• Peifeng Su
• Wei Wu
• Fuming Ying

Program of the tutorials

Tutorial n°1 (Monday p.m) : XMVB program

• Exercices from The Book ... >PCH< (30')
• Work with determinant (det) and with structures with H2

- use Atomic AO's, optimized VBSCF compare to HF CASSCF energies, looks at the coefficients.

• HF, F2 : VBSCF, different correlation wave functions (BOVB, VBCI,...), computation of weights and "charge-shift" character, also compute CASSCF wave functions.

• Pseudo states : compute |ab|+|ba| then only one determinant. Use it to for in situ bond energy [ethylene pi bond energy |ab| vs fondament 4 determinants ]

Tutorial n°2 (Tuesday p.m): VB applications

• Exercices from The Book ... >PCH< (30')
• O2 paradigm : compute singlet - triplet gap
• Benzene systeme pi dissymétrique

Tutorial n°3 (Wednesday p.m): VB vs Lewis structures BLW & HuLiS

• Formamide VB & Lewis
• Butadiene VB & Lewis
• Allyl radical and cation : MO, VB & Lewis ; ground state ? Excitation energy, gap ?? (SH : je laisse; c'est corrects?)
• Hyper conjugaison in ... ?

Tutorial n°4 (Friday p.m): State correlation diagrams

• VB & CASSCF ....
• Computation of H3 barrier (BOVB and VBCI)
• Selected 1,3 dipoles (see with Philippe) : computation of 3-structure D-BOVB wave function, and of the biradical gap, correlation gap vs. barriers
• State correlation Diagrams : SN2, H bonds