Sunday, June 10, 2018

hsab - Why does iron(III) form the trithiocyanate complex instead of the triisothiocyanate one?


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As far as I know, $\ce{Fe^{3+}}$ is a hard acid, and thus shouldn't it favor complexation with the nitrogen's lone pair rather than the softer S?




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periodic trends - Comparing radii in lithium, beryllium, magnesium, aluminium and sodium ions

Apparently the of last four, $\ce{Mg^2+}$ is closest in radius to $\ce{Li+}$. Is this true, and if so, why would a whole larger shell ($\ce{...