Lecture_8 - Apolar molecules could contain polar bonds but,...

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1 Apolar molecules could contain polar bonds but, the net dipole moment is zero. AB 2 CO 2 AB 3 BF 3 SO 3 AB 4 CH 4 CCl 4 6. Partial Ionic Character of Covalent Bonds: Dipolar molecule: electrons are not shared equally. What is the difference between an ionic bond and a polar covalent bond? Measurement of dipole moments of binary compounds of the type X Y, in the GAS PHASE there is probably no totally ionic bonds between pairs of atoms. Define : 100 XY of moment dipole calculated XY of moment dipole measured character ionic % × =
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2 Notes : ± As expected, the % ionic character increases as the EN difference increases. ± Most of the compounds with ionic character > 50% are actually considered ionic. ± Calculations and measurements are all done in the gas phase. they don’t necessarily apply in the solid phase. ± Operational definition of an ionic compound : Any compound that conducts an electric current when melted.
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This note was uploaded on 09/07/2010 for the course FAS chem 201 taught by Professor Sultan during the Summer '07 term at American University of Beirut.

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Lecture_8 - Apolar molecules could contain polar bonds but,...

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