CH14 Notes Part 1 - Bonding (VB Theory) VB = Valence Bond -...

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VB = V alence B ond - tries to explain how bonds form - predicts which orbitals / hybrid orbitals* are used Hybrid orbitals : - created from s,p,d orbitals as required . Bonding (VB Theory) Use the H atom orbitals, superimposed and filled using Aufbau and Pauli Principles and Hund’s Rule. VB Theory: A bond occurs when a HALF filled orbital from one atom overlaps with another HALF filled orbital on another atom. What if the orbitals don’t have the right geometry? What if there are not enough half-filled orbitals? Use HYBRIDIZATION: ‘Mixing’ of orbitals to make new hybrid orbitals. ALWAYS MAKE THE SAME NUMBER OF HYBRID ORBITALS AS ATOMIC ORBITALS YOU START WITH!! Each hybrid orbital has its own equation, so has its own shape. Hybridization (VB Theory) sp Hybridization (for 2 RHED) sp HYBRIDIZE sp + sp
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sp sp sp Hybridization (for 2 RHED) = position of nucelus Actual orientation: Angles: 180° sp 2 Hybridization (for 3 RHED) sp HYBRIDIZE + p + sp 2 sp 2 sp 2 sp 2 sp 2 sp 2 = position of nucelus sp 2 Hybridization (for 3 RHED) Actual orientation: Angles: 120° sp 3 Hybridization (for 4 RHED) HYBRIDIZE + p + p + sp 3 sp 3 sp 3 sp 3
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sp 3 sp 3 sp 3 = position of nucelus Actual orientation: sp 3 sp 3 Hybridization (for 4 RHED) Angles: 109.5°
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CH14 Notes Part 1 - Bonding (VB Theory) VB = Valence Bond -...

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