Unit 9: Advanced Bonding Theory
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Last updated 3:41 AM on 10/25/22
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18 Terms
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Bond length or bond distance
the distance between the nuclei in a bond
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Covalent Radii
values assigned to atoms such that the sum of the radii of atoms "A" and "B" approximate the A-B bond length
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Bond Order
the number of pairs of electrons in a bond
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Bond length depends on
bond order
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As bond order increases, the bond gets
shorter and stronger
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Bond Energy
the average enthalpy change for breaking an A-B bond in a molecule in its gas phase
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Valence bond theory
to explain the covalent bond from a quantum mechanical view
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Hybrid orbitals
bonding orbitals obtained by combinations of atomic orbitals of an atom
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Hybridization for linear geometric arrangement
sp
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Hybridization for trigonal planar geometric arrangement
sp2
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Hybridization for tetrahedral geometric arrangement
sp3
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Hybridization for trigonal bipyramidal geometric arrangement
sp3d
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Hybridization for octahedral geometric arrangement
sp3d2
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σ bonds
overlap along bonding axis
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π bonds
off bonding axis overlap, "side to side", 2 places of overlap
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Constructive [molecular orbital theory]
bonding
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Destructive [molecular orbital theory]
antibonding
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Molecular orbitals [molecular orbital theory]
spreading over several atoms or entire molecule
