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Covalent bonding in transition metals. Can someone help?

by Chemist20
Tags: bonding, covalent, metals, transition
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Apr18-12, 11:58 AM
P: 87
According to my book, for 1st row Transition Metals, the acidity of a aquo-complex is greater for those elements at the right of the periodic table. They justify this by saying that to the RHS, the cation is more polarizing and weakens the O-H bond to a greater extent.

I do get this, but for me, this is contradictory to the fact that towards the RHS, the d-orbital is more contracted and less available for bonding. THEREFORE, the degree of bonding between the metal and O is lower, and it does not "break" the O-H bond as much.

Any ideas?

thank you!
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