For example, in a S2 reaction, Walden inversion occurs at a tetrahedral carbon atom.

The so-called Walden inversion illustrates the stereochemical consequences of inversion at carbon.

Walden inversion is the inversion of a chiral center in a molecule in a chemical reaction.

In contrast, a reversal (Walden inversion) of the previously existing stereochemistry is observed in the S2 mechanism.

Racemization by Walden inversion may be restricted (such as ammonium or phosphonium cations), or slow.

These can then be reacted with e.g. N-methylbenzylamine, effecting a Walden inversion (SN2).

If the substrate under nucleophilic attack is chiral, this can lead, although not necessarily, to an inversion of stereochemistry, called the Walden inversion.

Solvolysis of a chiral reactant results in the racemate (as expected in S1) but is often accompanied by Walden inversion.

In particular he invented the stereochemical reaction known as Walden inversion and synthesized the first room-temperature ionic liquid, ethylammonium nitrate.

Since a molecule can form two enantiomers around a chiral center, the Walden inversion converts the configuration of the molecule from one enantiomeric form to the other.

If the electrophile is chiral, it typically keeps its chirality, though the S2 product's configuration is flipped as compared to that of the original electrophile (Walden inversion).

In 1895, Walden made his most remarkable discovery which was later named Walden inversion, namely that various stereoisomers can be obtained from the same compound via certain exchange reactions involving hydrogen.

Malic acid was important in the discovery of the Walden inversion and the Walden cycle, in which (-)-malic acid first is converted into (+)-chlorosuccinic acid by action of phosphorus pentachloride.

However, because of the new antisemitic laws and the increasing intensity of prevalent Fascism, Levi had difficulty finding a supervisor for his graduation thesis which was on the subject of Walden inversion, a study of the asymmetry of the carbon atom.