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Dissociation in chemistry is a general process in which molecules (or ionic compounds such as salts, or complexes) separate or split into other things such as atoms, ...
The dissociation involves cleaving of the molecular bonds in the adsorbate, and formation of new bonds with the substrate. Breaking the atomic bonds of the dissociating molecule requires a large amount of energy, thus dissociative adsorption is an example of chemisorption , where strong adsorbate-substrate bonds are created. [ 1 ]
Dissociation, in the wide sense of the word, is an act of disuniting or separating a complex object into parts. Dissociation may also refer to: Dissociation (chemistry) , general process in which molecules or ionic compounds (complexes, or salts) split into smaller particles, usually in a reversible manner
In chemistry, biochemistry, and pharmacology, a dissociation constant (K D) is a specific type of equilibrium constant that measures the propensity of a larger object to separate (dissociate) reversibly into smaller components, as when a complex falls apart into its component molecules, or when a salt splits up into its component ions.
Stepwise dissociation constants are each defined for the loss of a single proton. The constant for dissociation of the first proton may be denoted as K a1 and the constants for dissociation of successive protons as K a2, etc. Phosphoric acid, H 3 PO 4, is an example of a polyprotic acid as it can lose three protons.
In chemistry, dissociative substitution describes a reaction pathway by which compounds interchange ligands. The term is typically applied to coordination and organometallic complexes, but resembles the S N 1 mechanism in organic chemistry. This pathway can be well described by the cis effect, or the labilization of CO ligands in the cis position.
Dissociation is when a molecule falls apart, ionisation is just losing electrons. There are several processes that can give a molecule energy, things like electron impact, (multi) photon impact, third body impact, etc., with each having the posibilty of leaving the molecule in some other state;
The mechanism behind hydrogen spillover has been long disputed. [5] Khoobiar’s work in 1964 marks the nascency of the spillover concept. [3] In his findings, yellow WO 3 can be reduced by H 2 to a blue compound with the use of a platinum catalyst. [3]