Chy102-Tutorial 09

Chy102-Tutorial 09 - General Chemistry General Chemistry...

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Unformatted text preview: General Chemistry General Chemistry General Chemistry General Chemistry 1 C h e m . C h e m . 1 0 2 1 0 2 f o r E n g i n e e r i n g f o r E n g i n e e r i n g C h e m . C h e m . 1 0 2 1 0 2 f o r E n g i n e e r i n g f o r E n g i n e e r i n g Tutorial 9 Objectives • Valence Bond (VB) Theory and orbital hybridization • Types of hybrid orbitals – sp Hybridization – sp 2 Hybridization – sp 3 Hybridization – sp 3 d Hybridization 2 – sp 3 d 2 Hybridization • End-to-end (head to head) overlap and sigma ( σ ) bonding • Side to side (lateral) overlap and pi ( π ) bonding The steps from molecular formula to the hybrid orbitals used in bonding Composition and Orientation of Hybrid Orbitals Electron pairs 2 3 4 5 6 3 Postulating the Hybrid Orbitals in a Molecule Example: Describe how mixing of atomic orbitals on the central atoms leads to the hybrid orbitals in the following: a) Methyl amine, CH 3 NH 2 b) Xenon tetrafluoride, XeF 4 Plan: From the Lewis structure and molecular shape, we know the number and arrangement of electron groups around the central atoms, from which we postulate the type of hybrid orbitals involved. Then we write the partial orbital diagram for each central atom before and after the orbitals are hybridized....
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This note was uploaded on 12/13/2010 for the course CHEM 102 taught by Professor Raafat during the Spring '10 term at Ain Shams University.

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Chy102-Tutorial 09 - General Chemistry General Chemistry...

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