Search results for "PHOTOCHEMISTRY"
showing 10 items of 2034 documents
ChemInform Abstract: Molybdenum Pentachloride Mediated Synthesis of Spirocyclic Compounds by Intramolecular Oxidative Coupling.
2016
Oxidative treatment of 4-methoxy substituted 2-aryl cinnamates leads to an dealkylative C—C coupling and gives access to spirocyclic compounds.
ChemInform Abstract: Molybdenum Pentachloride. A Multifaceted Reagent for Efficient Coupling of Aromatics
2015
Direct Anodic Dehydrogenative Cross- and Homo-Coupling of Formanilides
2018
Zirconocen–Benzyme-Mediated Intramolecular Coupling of Bis(alkynyl)phosphane: A Way to Mono- and Tricyclic 1,2-Dihydrophosphetes
1997
Electrically Conductive Phthalocyanine Assemblies. Structural and Non-Integer Oxidation Number Considerations
1990
Aggregation is a well-known phenomenon in phthalocyanine chemistry. Interactions can occur between adjacent phthalocyanine rings, both in organic and aqueous phases, resulting in coupling between the electronic states of two, or more, phthalocyanine units [1].
Transition-Metal-Free Decarboxylative Photoredox Coupling of Carboxylic Acids and Alcohols with Aromatic Nitriles.
2016
A transition-metal-free protocol for the redox-neutral light-induced decarboxylative coupling of carboxylic acids with (hetero)aromatic nitriles at ambient temperature is presented. A broad scope of acids and nitriles is accepted, and alcohols can be coupled in a similar fashion through their oxalate half esters. Various inexpensive sources of UV light and even sunlight can be used to achieve this C–C bond formation proceeding through a free radical mechanism.
ChemInform Abstract: Efficient Anodic and Direct Phenol-Arene C,C Cross-Coupling: The Benign Role of Water or Methanol.
2012
For the first time a significantly improved electrochemical C-C cross-coupling is reported.
Back Cover Picture: Coupling of Azomethine Ylides with Nitrilium Derivatives ofcloso-Decaborate Clusters: A Synthetic and Theoretical Study (ChemPlus…
2012
1,3-Benzyl Migration in Iminium Ions: Evidence for a Fast Free-Radical Chain Reaction
2011
The “exocyclic” 1,3-benzyl shift observed in iminium salts derived from 1-benzyl-1,2,3,4-tetrahydroisoquinolines is related to the “endocyclic” Knabe rearrangement. A crossover experiment, isotopic labelling, the study of initiators and inhibitors as well as DFT calculations of gas-phase model structures provide evidence for a free-radical pathway under kinetic entropy control that is not affected by “slow” radical traps.
Photostimulated processes in the CsI-Tl crystal after UV irradiation
1997
The photostimulated luminescence is studied for CsI-Tl crystal after irradiation with ultraviolet light in the 80 - 300 K temperature range. The PSL creation spectrum coincides with the D absorption band at 80 K. Three bands are observed in the stimulation spectra at 80 K: 1400, 950, and 600 nm. The 1400 and 950 nm stimulation bands are presumably explained as optical transitions in the Tl 0 and V k centers situated in the spatial correlated pairs. The stimulation at 600 nm band is ascribed to the unperturbed Tl 0 centers.