Trimethyloxonium tetrafluoroborate

Trimethyloxonium tetrafluoroborate
Names
	IUPAC name Trimethyloxonium tetrafluoroborate
	Other names Trimethyloxonium fluoborate
Identifiers
CAS Number	420-37-1 ;
3D model (JSmol)	Interactive image;
ChemSpider	2016863;
ECHA InfoCard	100.006.360
PubChem CID	2735153;
CompTox Dashboard (EPA)	DTXSID20883377 ;
	InChI InChI=1S/C3H9O.BF4/c1-4(2)3;2-1(3,4)5/h1-3H3;/q+1;-1 Key: CZVZBKHWOFJNCR-UHFFFAOYSA-N;
	SMILES F[B-](F)(F)F.[O+](C)(C)C;
Properties
Chemical formula	C3H9BF4O
Molar mass	147.91 g·mol−1
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Trimethyloxonium tetrafluoroborate Me₃OBF₄ (sometimes called the "Meerwein salt" after Hans Meerwein) is a strong methylating agent. It is the methyl analog to triethyloxonium tetrafluoroborate. Commercially available, this compound is prepared similarly, by reaction of boron trifluoride etherate with dimethyl ether and epichlorohydrin.^[1]

References

^ T. J. Curphey (1988). "Trimethyloxonium Tetrafluoroborate". Organic Syntheses; Collected Volumes, vol. 6, p. 1019.