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This tag should be applied to questions that deal with the particular arrangement of atoms in a molecule, the so-called molecular structure or geometry.

6 votes
2 answers
5k views

How do α,β-unsaturated acids undergo decarboxylation?

I know the concerted mechanism for β-keto acids, but neither could I figure out, nor was I able to find out the mechanism for α,β-unsaturated acids. Any help is appreciated.
user226375's user avatar
14 votes
3 answers
13k views

Why is the $\mathrm d_{z^2}$ orbital so different from the rest?

$\mathrm d_{z^2}$ orbital appears to be special: Although degenerate with other d orbitals, it has no nodal planes, instead it has two nodal "cones". Instead of having four lobes, it has two lobes an …
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