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structure_and_bonding_f08

structure_and_bonding_f08 - Structures and bonding models...

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Structures and bonding models for covalent compounds of p-block elements – Valence Bond Lewis structures (atom connectivities, all valence electrons, formal charges) Valence Shell Electron Pair Repulsion (VSEPR) (foolproof method of predicting molecular structure based upon the number of electron pairs around atom) Modified Lewis structures (depict molecular structure plus, valence electrons, and formal charges) Hybridization (equivalent orbitals for all valence shell electron pairs) Prediction of composition and structure of binary compounds (based on valence shell electron configurations of combining atoms and the notion that a chemical bond consists of a shared electron pair in a bonding orbital formed by overlap of orbitals on adjacent atoms)
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Lewis Structures Lewis structures depict Atom connectivities All valence electrons of each atom in a molecule or ion Bonding elecron pairs represented by a line connecting atoms Lone (non-bonding) pairs of electrons represented by pair of dots Formal charges consistent with the number of electrons assigned to each atom
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VESPR model Foolproof method of predicting molecular structure based upon the number of σ bonding electron pairs and lone pairs; π bonding pairs do not influence the gross structure Modified Lewis structures Depict molecular structure, location of all valence shell electrons, and formal charges when present VESPR model/modified Lewis structures
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Valence Shell Electron Repulsion Model SF 6 IF 5 XeF 4 Octahedral square pyramidal square planar 6 bp 5 bp, 1lp 4 bp, 2 lp octahedral, 90° 6 PF 5 SF 4 ICl 3 I 3 - trigonal bipyramidal see saw T-shape linear 5 bp 4 bp, 1 lp
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