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Highlights in Solute-Solvent Interactions (Paperback, Softcover reprint of the original 1st ed. 2002)
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Highlights in Solute-Solvent Interactions (Paperback, Softcover reprint of the original 1st ed. 2002)
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Most organic molecules retain their integrity when dissolved, and
even though in such cases the effects exerted by solvents are, in
the language of the coordination chemist, of the "outer sphere"
kind, the choice of solvent can be critical to the successful
outcome of an operation or preparation. Solubilities of reactants
and products must be taken into account, and even if the organic
principals in the reactions retain their integrity, many of the
reagents are electrolytes, and their state of aggregation will
affect their reactivity. In testifying to the importance of
understanding solute-solvent interactions I draw attention to a
large class of inorganic species for which the involvement in the
chemical and physical properties by the solvent is even more deeply
seated. It is comprised by the large body of metal atoms in low
oxidation states for which solvent molecules intervene as reagents.
At the same time, because the ions carry charges, the effects
arising from outer sphere interactions are usually greater than
they are for neutral molecules. To cite an example: when FeCb(s) is
dissolved in water to form a dilute - say O. OlO- solution there is
a complete reorganization of the coordination sphere of the cation.
Whereas in the solid each cation is surrounded by six chloride
ions, in the solution the dominant form is [Fe(H20)6]3+ followed by
[Fe(H20)sCI]2+, [Fe(H20)4CI2]+, etc. in rapidly decreasing
abundance.
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