Sulfur trioxide pyridine complex

Identifiers

CAS Number

26412-87-3^Y

3D model (JSmol)

Interactive image

ChemSpider

147422^Y

ECHA InfoCard

100.043.334

PubChem CID

168533

InChI

InChI=1S/C5H5N.O3S/c1-2-4-6-5-3-1;1-4(2)3/h1-5H;^Y

Key: UDYFLDICVHJSOY-UHFFFAOYSA-N^Y
InChI=1/C5H5N.O3S/c1-2-4-6-5-3-1;1-4(2)3/h1-5H;

Key: UDYFLDICVHJSOY-UHFFFAOYAG

SMILES

O=S(=O)=O.n1ccccc1

Properties

Chemical formula

C₅H₅NSO₃

Molar mass

159.16 g/mol

Appearance

white solid

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

(what is ^YN ?)

Infobox references

Sulfur trioxide pyridine complex is the compound with the formula C₅H₅NSO₃. It is a colourless solid that dissolves in polar organic solvents. It is the adduct formed from the Lewis base pyridine and the Lewis acid sulfur trioxide. The compound is mainly used as a source of sulfur trioxide, for example in the synthesis of sulfate esters from alcohols:

This is useful for sulfonylation reactions, especially in the sulfonylation of furans. It is also an activating electrophile in a Parikh-Doering oxidation.

...
Wikipedia