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HSAB is widely used in chemistry for explaining the stability of compounds, reaction mechanisms and pathways. It assigns the terms 'hard' or 'soft', and 'acid' or 'base' to chemical species . 'Hard' applies to species which are small, have high charge states (the charge criterion applies mainly to acids, to a lesser extent to bases), and are ...
The classification into hard and soft acids and bases (HSAB theory) followed in 1963. The strength of Lewis acid-base interactions, as measured by the standard enthalpy of formation of an adduct can be predicted by the Drago–Wayland two-parameter equation.
Ralph Gottfrid Pearson (January 12, 1919 – October 12, 2022) was an American physical inorganic chemist best known for the development of the concept of hard and soft acids and bases (HSAB). He received his Ph.D. in physical chemistry in 1943 from Northwestern University , and taught chemistry at Northwestern faculty from 1946 until 1976 ...
The Hamburg Foundation Asia Bridge (HSAB) is a foundation set up by the Hamburg Senate and the Hamburg Parliament to promote development cooperation in Asia while working with businesses and institutions in Hamburg. [1] It was founded in 2005 [2] and is a charitable foundation under civil law with legal capacity. Hamburg's Senate and Parliament ...
In the theory of chemical reactivity, the Klopman–Salem equation describes the energetic change that occurs when two species approach each other in the course of a reaction and begin to interact, as their associated molecular orbitals begin to overlap with each other and atoms bearing partial charges begin to experience attractive or repulsive electrostatic forces.
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Before we explain this incorrectness, let us examine a little of the principles of HSABs: Pearson is the one who created the HSAB theory, based on the principle: Hard acids can react well with hard bases, amd soft acids with soft bases. The following is a table of common HSABs. Blnguyen (bananabucket) 03:53, 21 November 2006 (UTC)
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