25640-27-1

Basic information

• Product Name: Ethynyl, phenyl-
• CAS NO: 25640-27-1
• Molecular Formula: C8H5
• Molecular Weight: 101.128
• Mol File: 25640-27-1.mol
• Article Data: 4

Chemical Properties

• CAS DataBase Reference: Ethynyl, phenyl-(CAS DataBase Reference)
• NIST Chemistry Reference: Ethynyl, phenyl-(25640-27-1)
• EPA Substance Registry System: Ethynyl, phenyl-(25640-27-1)

Safety Data

• Hazardous Substances Data: 25640-27-1(Hazardous Substances Data)

Upstream product

• 932-88-7 1-iodo-2-phenylethyne 
• 63707-12-0 Phenyl(p-tolylthio)acetylene radical anion 
• 3141-58-0 tert-butoxy radical 
• 536-74-3 phenylacetylene 
• 98943-20-5 (OEP)Ga(CCC₆H₅) 
• 72340-09-1 (OEP)In(CCC₆H₅) 
• 72340-12-6 (TPP)In(CCC₆H₅) 
• 98943-17-0 (TPP)Ga(CCC₆H₅) 

Relevant articles and documents

FTIR and computational studies of gas-phase hydrogen atom abstraction kinetics by t-butoxy radical

By using Fourier-Transform Infrared (FTIR) absorption spectroscopy, rate coefficients in the range of 10-16 to 10-14 cm3 molecule-1 s-1 have been determined for the hydrogen atom abstraction reactions of several substrates including halogenated organic compounds and amines by t-butoxy radical generated from the uv photolysis of t-butyl nitrite in the gas phase. Arrhenius parameters for selected reactions have been measured in the temperature range 299-318 K. Transition states and activation barriers for such reactions have been computed with the help of Gaussian 03 software and found to match very well with the experimental values.

Photoreactivity of σ-bonded metalloporphyrins. 1. Formation of zwitterionic indium and gallium porphyrin complexes in tetrahydrofuran

Continuous irradiation and laser-flash photolysis experiments were carried out in THF on σ-bonded indium and gallium porphyrins of the type (P)M(R), where P is the dianion of tetraphenylporphyrin (TPP) or octaethylporphyrin (OEP), M is In or Ga, and R is CH3, C2H5, C4H9, CH(CH3)2, C(CH3)3, CH=CHC6H5, or C≡CC6H5. Steady-state photolysis of (P)M(R), where R = CH3, C2H5, C4H9, CH(CH3)2, or C(CH3)3, leads to photodissociation of the metal-carbon bond. In contrast, indium and gallium porphyrins with σ-bonded CH=CHC6H5 or C≡CC6H5 groups do not undergo this photodissociation reaction. Laser photolysis studies were carried out both in the presence and in the absence of ferrocene and indicate that the photoreaction occurs via a triplet state originating from the porphyrin macrocycle. The resulting ESR spectra obtained after photolysis of (TPP)In(C2H5) in THF are compared with ESR spectra obtained after electrochemical reduction of (TPP)InCl. On the basis of these results, a photochemical generation of zwitterionic metalloporphyrin radicals of the type (P)-In+ is demonstrated to occur in THF. Similarly, the (P)Ga(R) complexes also form a zwitterionic photoproduct upon irradiation as evidenced by ESR and UV-visible spectra. The photoreactivity of (P)In(R) and (P)Ga(R) is discussed with respect to the porphyrin macrocycle, the σ-bonded R group, and the solvent polarity.