ChemInform Abstract: Efficient Visible Light Photoresponse Following Surface Complexation of Titanium Dioxide with Transition Metal Cyanides.

ChemInform ◽  
1989 ◽  
Vol 20 (17) ◽  
Author(s):  
E. VRACHNOU ◽  
M. GRAETZEL ◽  
A. J. MCEVOY
Keyword(s):  
Titanium Dioxide ◽  
Transition Metal ◽  
Visible Light ◽  
Surface Complexation ◽  
Metal Cyanides

Regioselective C3-H Trifluoromethylation of 2H-Indazole Under Transition-Metal-Free Photoredox Catalysis

2019 ◽  
Author(s):  
Arumugavel Murugan ◽  
Venkata Nagarjuna Babu ◽  
Nagaraj Sabarinathan ◽  
Sharada Duddu. S
Keyword(s):  
Transition Metal ◽  
Visible Light ◽  
Practical Approach ◽  
Hypervalent Iodine ◽  
Radical Mechanism ◽  
Photoredox Catalysis ◽  
Metal Free

Here we report a visible-light-promoted metal-free regioselective C3-H trifluoromehtylation reaction that proceeds via radical mechanism and which supported by control experiments. The combination of photoredox catalysis and hypervalent iodine reagent provides a practical approach for the present trifluoromethylation reaction and synthesis of a library of trifluoromethylated indazoles.

Highly chemoselective deoxygenation of N-heterocyclic N-oxides under transition metal-free conditions

2021 ◽  
Vol 19 (16) ◽  
pp. 3735-3742
Author(s):  
Se Hyun Kim ◽  
Ju Hyeon An ◽  
Jun Hee Lee
Keyword(s):  
Transition Metal ◽  
Visible Light ◽  
Eosin Y ◽  
Metal Free ◽  
Simple Protocol

Here, we provide an operationally simple protocol for the highly chemoselective deoxygenation of various functionalized N-heterocyclic N-oxides under visible light-mediated photoredox conditions with Na2-eosin Y as an organophotocatalyst.

Interaction of cyclosporin A molecules with alkali and transition metal atoms on Cu(111)

2021 ◽  
Vol 57 (23) ◽  
pp. 2923-2926
Author(s):  
Yuanyuan Guo ◽  
Li Jiang ◽  
Ari Paavo Seitsonen ◽  
Bodong Zhang ◽  
Joachim Reichert ◽  
...  
Keyword(s):  
Transition Metal ◽  
Cyclosporin A ◽  
Surface Complexation ◽  
Metal Atoms ◽  
Transition Metal Atoms ◽  
Natural Peptide

Discriminatory on-surface complexation by the natural peptide CsA: up to two K atoms within its macrocycle, Co to residue 9 and the macrocycle, Fe non-selectively.

Carbon-13/carbon-12 isotope effects on nitrogen-15 chemical shielding in some diamagnetic cyano complexes

1982 ◽  
Vol 60 (17) ◽  
pp. 2194-2197 ◽  
Author(s):  
Roderick E. Wasylishen
Keyword(s):  
Transition Metal ◽  
High Field ◽  
Chemical Shifts ◽  
Isotope Effects ◽  
Chemical Shielding ◽  
Cyanide Ion ◽  
Theoretical Formulation ◽  
Metal Cyanides ◽  
Shielding Constants ◽  
Cyano Complexes

Carbon-13/carbon-12 isotope-induced 15N chemical shifts of 0.06 to 0.10 ppm have been observed for the cyanide ion and several transition metal cyanides. In each case, the 15N resonance of the 13C labelled isotopomers is to high field of that in the corresponding carbon-12 species. The sensitivity of the 15N and 13C shielding constants in the cyanide ion to small changes in the CN bond length are evaluated using the theoretical formulation of Jameson: (∂σ(15N)/∂r)e = −872 ± 160 ppm/Å and (∂σ(13C)/∂r)e = −473 ± 90 ppm/Å. Nitrogen-15 chemical shifts in the metal complexes exhibit basically the same behaviour as do the 13C chemical shifts in these same complexes.

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