what is called chillating reagents
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Chelating agents are chemical compounds that react with metal ions to form a stable, water-soluble complex. They are also known aschelants, chelators, or sequestering agents. ... Chelating agents are usually organic compounds (a compound that contains carbon).
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A chelating agent is a compound, usually quite a bit large, which can envelope an ion.
Now to get a bit more technical. A positively charged ion when dissolved in a solvent or in a crystal would have several oppositely charged ions or neutral species with excess electron density surrounding it. These ions would be getting some electrons shared to them by the surrounding electron density cloud which would make the structure more stable.
Now, in a solution the chances of the positive ion getting surrounded by a large number(4-6) of these requisite electron rich species is slightly low. The chances are much much higher for the positive ion to get attached to a single species. Now if that species is able to donate a large amount of negative charge, the union would be energetically as well as entropically more favorable than the single donating species. Such species which can donate multiple electron pairs are called chelators.
These chelators can help in dissolving ions as well as in controlling reactions.
An example of a very strong chelators is EDTA or ethyldiaminetetraacetate
Now to get a bit more technical. A positively charged ion when dissolved in a solvent or in a crystal would have several oppositely charged ions or neutral species with excess electron density surrounding it. These ions would be getting some electrons shared to them by the surrounding electron density cloud which would make the structure more stable.
Now, in a solution the chances of the positive ion getting surrounded by a large number(4-6) of these requisite electron rich species is slightly low. The chances are much much higher for the positive ion to get attached to a single species. Now if that species is able to donate a large amount of negative charge, the union would be energetically as well as entropically more favorable than the single donating species. Such species which can donate multiple electron pairs are called chelators.
These chelators can help in dissolving ions as well as in controlling reactions.
An example of a very strong chelators is EDTA or ethyldiaminetetraacetate
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