Mulliken's Scale | Electronegativity Scales
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In 1934, Mulliken suggested an
In 1934, Mulliken suggested an alternative approach to electronegativity based on ionization energy and electron affinity of an atom. According to this method electronegativity could be regarded as the average of the ionization energy and electron affinity of an atom.
Electronegativity is equal to ionization energy plus electron affinity the whole divided by two.
Mulliken used ionisation energy and electron affinity values measured in electron volts and values were found to be 2.8 times higher than Pauling values.
The values of ionisation energy and electron affinity are measured in kilo joules per mole and one electron volt is equal to 96.48 kilo joules per mole.
Therefore the commonly accepted Pauling values are more nearly obtained by Electronegativity is equal to ionization energy plus electron affinity divided by 2 into 2.8 into 96.48
Is equal to ionization energy plus electron affinity divided by 540.
This method has an ordinary theoretical basis and also has advantage that different values can be obtained for different oxidation states of the same element.
Disadvantage
Although Mulliken’s scale is less empirical than Pauling Scale, yet it suffers from a serious disadvantage that electron affinities with the exception of a few elements are not reliably known.
Electronegativity is equal to ionization energy plus electron affinity the whole divided by two.
Mulliken used ionisation energy and electron affinity values measured in electron volts and values were found to be 2.8 times higher than Pauling values.
The values of ionisation energy and electron affinity are measured in kilo joules per mole and one electron volt is equal to 96.48 kilo joules per mole.
Therefore the commonly accepted Pauling values are more nearly obtained by Electronegativity is equal to ionization energy plus electron affinity divided by 2 into 2.8 into 96.48
Is equal to ionization energy plus electron affinity divided by 540.
This method has an ordinary theoretical basis and also has advantage that different values can be obtained for different oxidation states of the same element.
Disadvantage
Although Mulliken’s scale is less empirical than Pauling Scale, yet it suffers from a serious disadvantage that electron affinities with the exception of a few elements are not reliably known.
6 سال پیش
در تاریخ 1397/02/13 منتشر شده
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