21654-46-6

Basic information

• Product Name: 3H-Indolium, 1,2,3,3-tetramethyl-, tetrafluoroborate(1-)
• CAS NO: 21654-46-6
• Molecular Formula: C12H16N.BF4
• Molecular Weight: 261.07
• Mol File: 21654-46-6.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: 3H-Indolium, 1,2,3,3-tetramethyl-, tetrafluoroborate(1-)(CAS DataBase Reference)
• NIST Chemistry Reference: 3H-Indolium, 1,2,3,3-tetramethyl-, tetrafluoroborate(1-)(21654-46-6)
• EPA Substance Registry System: 3H-Indolium, 1,2,3,3-tetramethyl-, tetrafluoroborate(1-)(21654-46-6)

Safety Data

• Hazardous Substances Data: 21654-46-6(Hazardous Substances Data)

Downstream Products

• 2016-67-3 6-[2-(1,3,3-trimethyl-2,3-dihydro-1H-indol-2-ylidene)ethylidene]-2,4-cyclohexadienone 
• 10017-85-3 4-[2-(1,3,3-trimethyl-2,3-dihydro-1H-indol-2-ylidene)ethylidene]-2,5-cyclohexadienone 

Relevant articles and documents

Synthesis and Properties of β-Phospha-trimethinecyanine Dyes with Indoline End Groups

Reaction of 1,3,3-trialkyl-2-methyleneindolines 4 and 5 with phosphorus(III) halides yields, by a twofold nucleophilic substitution, the halogeno-phosphanes 6a-c, which in turn react with trimethyloxonium tetrafluoroborate to give the β-phospha-trimethinecyanine dyes 3a, b.These β-phospha-cyanines 3a, b are the first higher-methinylogous representatives of the phosphamonomethinecyanine dyes 1, synthesized in 1964 by Dimroth and Hoffmann as the first compounds containing phosphorus in the oxidation state +3 and with coordination number 2. - The 1H-, 13C-, 31P-NMR- as well as the UV/VIS spectra of these β-phospha-cyanines 3a, b and of the analogous β-"carba"-, β-aza- and β-arsa-trimethinecyanines are discussed with respect to their constitution, configuration, and ?-electron-density distribution.