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How molecules are formed: generally two other molecules react

How molecules are formed: generally two other molecules react. How molecules are formed: generally two other molecules react. What factors are involved?. Molecule R. Molecule S. Molecule R. Joined through atoms r and s. Molecule S. Molecule R. Joined through atoms r and s.

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How molecules are formed: generally two other molecules react

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  1. How molecules are formed: generally two other molecules react

  2. How molecules are formed: generally two other molecules react What factors are involved?

  3. Molecule R Molecule S

  4. Molecule R Joined through atoms r and s Molecule S

  5. Molecule R Joined through atoms r and s Molecule S Makes a supermolecule

  6. The possible interactions Molecule R Joined through atoms r and s Molecule S Makes a supermolecule

  7. Molecule R Joined through atoms r and s Molecule S Lets look at FMO concepts L H Makes a supermolecule

  8. Orbital Control Molecule R Joined through atoms r and s Molecule S Lets look at FMO concepts L H One gets preferential interaction between frontier orbitals closest in energy

  9. Molecule R Joined through atoms r and s Molecule S Lets look at FMO concepts L H If there is substantial energy difference

  10. Reactions are governed by charge control Molecule R Joined through atoms r and s Molecule S L H If there is substantial energy difference

  11. Hard and Soft Acid Base Theory

  12. Hard and Soft Acid Base Theory Charge control involves small, polarizable electron donors and acceptors

  13. Hard and Soft Acid Base Theory Charge control involves small, polarizable electron donors and acceptors Large atoms with little or no charge almost unsovated and readily polarized

  14. Relationship between hardness and electronegativity

  15. Relationship between hardness and electronegativity Electronegativity = = (I + A)/2

  16. Relationship between hardness and electronegativity Electronegativity = = (I + A)/2 Hardness = = (I-A)/2

  17. Relationship between hardness and electronegativity I = E HOMO Electronegativity = = (I + A)/2 Hardness = = (I-A)/2 A = E LUMO

  18. Relationship between hardness and electronegativity I = E HOMO Electronegativity = = (I + A)/2 Hardness = = (I-A)/2 A = E LUMO Thus, we see the useful relationship of hardness to FMO theory.

  19. Thermochemical Data Bond energies (Homolytic) C-H 99 kcal/mol C-C 83 C-O 86 C-Cl 79 C-Br 66 C-I 52

  20. Thermochemical Data Bond energies (Homolytic) C-H 99 kcal/mol C-C 83 C-O 86 C-Cl 79 C-Br 66 C-I 52

  21. Thermochemical Data Bond energies C-H 99 kcal/mol C-C 83 C C 143 C C 194

  22. Thermochemical Data Bond energies Try to know some trends:

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