166773-08-6

Basic information

• Product Name: 1,3,4-Triphenyl-4,5-dihydro-1H-1,2,4-triazol-5-ylidene
• Synonyms: 2,4-DIHYDRO-2,4,5-TRIPHENYL-3H-1,2,4-TRIAZOL-3-YLIDENE;1,3,4-TRIPHENYL-4,5-DIHYDRO-1H-1,2,4-TRIAZOL-5-YLIDENE;1,3,4-TRIPHENYL-4,5-DIHYDRO-1H-TRIAZOL-5-YLIDENE;1,3,4-Triphenyl-4,5-dihydro-1H-1,2,4-triazol-5-ylidene,96%
• CAS NO: 166773-08-6
• Molecular Formula: C₂₀H₁₅N₃
• Molecular Weight: 297.35
• Mol File: 166773-08-6.mol
• Article Data: 8

Chemical Properties

• Melting Point: 150 °C
• Boiling Point: 428.86°C (rough estimate)
• Flash Point: 215.1°C
• Appearance: Beige/Crystalline Powder
• Density: 1.1226 (rough estimate)
• Vapor Pressure: 0mmHg at 25°C
• Refractive Index: 1.6000 (estimate)
• Storage Temp.: Freezer (-20°C)
• CAS DataBase Reference: 1,3,4-Triphenyl-4,5-dihydro-1H-1,2,4-triazol-5-ylidene(CAS DataBase Reference)
• NIST Chemistry Reference: 1,3,4-Triphenyl-4,5-dihydro-1H-1,2,4-triazol-5-ylidene(166773-08-6)
• EPA Substance Registry System: 1,3,4-Triphenyl-4,5-dihydro-1H-1,2,4-triazol-5-ylidene(166773-08-6)

Safety Data

• Safety Statements: 24/25
• Hazardous Substances Data: 166773-08-6(Hazardous Substances Data)

Usage

Chemical Properties

beige crystalline powder

InChI:InChI=1/C20H17N3/c1-4-10-17(11-5-1)20-21-23(19-14-8-3-9-15-19)16-22(20)18-12-6-2-7-13-18/h1-15H,16H2

Upstream product

• 102913-61-1 [(5RS)-1,4-bis[2,6-bis(1-methylethyl)phenyl]-4,5-dihydro-3-phenyl-1H-1,2,4-triazol-5-yl]phenylmethanone 
• 93-98-1 N-phenyl benzoyl amide 
• 13136-18-0 N-phenylbenzamide phenylhydrazone 
• 5014-47-1 N-chloro-N-phenylbenzamide 
• 154643-41-1 5-methoxy-1,3,4-triphenyl-4,5-dihydro-1H-1,2-4-triazoline 

Downstream Products

• 2273-09-8 1,3,4-Triphenyl-4,5-dihydro-1H-1,2,4-triazol-5-one 
• 2273-08-7 1,3,4-Triphenyl-4,5-dihydro-1H-1,2,4-triazol-5-thione 
• 1254381-14-0 1-(1,3,4-triphenyl-4,5-dihydro-1H-1,2,4-triazol-5-yl)propan-1-one 

Relevant articles and documents

N-Heterocyclic carbene-mediated redox condensation of alcohols

N-Heterocyclic carbenes (NHCs) with a variety of oxidants promote the Mitsunobu-type coupling reactions of alcohols with phenols, carboxylic acids, and phthalimide. Experiments using a chiral alcohol indicate that these reactions proceed via SN1 or SN2 pathways depending on the polarity of the used solvents. The NHCs are consumed as reducing reagents to form their oxides as readily separable byproducts.

Cooperative N-heterocyclic carbene/Br?nsted acid catalysis for the tail-to-tail (co)dimerization of methacrylonitrile

The first tail-to-tail dimerization of methacrylonitrile (MAN) has been realized by the cooperative use of N-heterocyclic carbene (NHC) and Br?nsted acid catalysts, producing 2,5-dimethylhex-2-enedinitrile with the E/Z ratio of 24:76. Although the NHC alo

Preparation and application of 1,3,4-triphenyl-4,5-dihydro-1H-1,2,4-triazol-5-ylidene, a stable carbene

The title compound 1,3,4-triphenyl-4,5-dihydro-1H-1,2,4-triazol-5-ylidene has been prepared in quantitative yield from the corresponding 5-methoxytriazoline precursor by simple thermal decomposition in vacuo via α-elimination of methanol. The carbene is a