Chemistry:Dimethoxytrityl

Dimethoxytrityl

Names
IUPAC name bis(4-methoxyphenyl)-phenylmethyl radical
Other names 4,4'-Benzylidenedianisole 4,4'-Dimethoxytrityl cation 4,4'-Dimethoxytriphenylmethyl radical Bis(p-methoxyphenyl)phenylmethyl radical DMT
Identifiers
CAS Number	7500-76-7
3D model (JSmol)	Interactive image
PubChem CID	82012
InChI InChI=1S/C21H20O2/c1-22-19-12-8-17(9-13-19)21(16-6-4-3-5-7-16)18-10-14-20(23-2)15-11-18/h3-15,21H,1-2H3 Key: RIRAVPPUGSNYOU-UHFFFAOYSA-N
SMILES COC1=CC=C(C=C1)C(C2=CC=CC=C2)C3=CC=C(C=C3)OC
Properties
Chemical formula	C21H19O2
Molar mass	303.4
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Tracking categories (test):

• SizeSet

Dimethoxytrityl, often abbreviated DMT, is a protecting group widely used for protection of the 5'-hydroxy group in nucleosides, particularly in oligonucleotide synthesis.

It is usually bound to a molecule, but can exist as a stable cation in solution, where it appears bright orange.