Mechanistic and exploratory organic photochemistry. XXXIV. Control of photochemical reaction pathways by excited-state multiplicity

1968 ◽  
Vol 90 (15) ◽  
pp. 4191-4193 ◽  
Author(s):  
H. E. Zimmerman ◽  
R. S. Givens ◽  
R. M. Pagni
Keyword(s):  
Excited State ◽  
Photochemical Reaction ◽  
Reaction Pathways ◽  
Organic Photochemistry ◽  
State Multiplicity

Synthesis of nitropolychlorinated dibenzo-p-dioxins (NPCDDs) and their photochemical reaction with nucleophiles

1995 ◽  
Vol 73 (6) ◽  
pp. 826-834 ◽  
Author(s):  
Simona G. Merica ◽  
Nigel J. Bunce
Keyword(s):  
Excited State ◽  
Quantum Yield ◽  
Linear Relationship ◽  
Nitro Group ◽  
Photochemical Reaction ◽  
Ring Opening ◽  
Sodium Ethoxide ◽  
Chemical Yield ◽  
Triplet Excited State ◽  
High Chemical

A series of nitropolychlorodibenzo-p-dioxins (NPCDDs) was synthesized by condensation between catechols and 2,6-dinitrohalobenzene derivatives. In the presence of sodium ethoxide in anhydrous ethanol, these underwent photochemical SN2Ar* substitutions meta to the nitro group in high chemical yield and moderate quantum yield. Both ring-opening and chloride replacement reactions were observed. The reactions involved the triplet excited state of the NPCDD, and showed a linear relationship between Φ−1 and [nucleophile]−1. Analogous reactions with KCN in methanol showed similar behaviour, but the products could not be isolated. Keywords: photosubstitution, SN2Ar*, dibenzo-p-dioxins.

scholarly journals Structure of the Photochemical Reaction Path Populated via Promotion of CF2I2into Its First Excited State

2009 ◽  
Vol 113 (40) ◽  
pp. 10767-10771 ◽  
Author(s):  
Patrick Z. El-Khoury ◽  
Alexander N. Tarnovsky ◽  
Igor Schapiro ◽  
Mikhail N. Ryazantsev ◽  
Massimo Olivucci
Keyword(s):  
Excited State ◽  
Photochemical Reaction ◽  
Reaction Path ◽  
First Excited State

Organic photochemistry. XXVII. Electronically excited state structures

1967 ◽  
Vol 89 (25) ◽  
pp. 6589-6595 ◽  
Author(s):  
Howard E. Zimmerman ◽  
Roger W. Binkley ◽  
John J. McCullough ◽  
Gary A. Zimmerman
Keyword(s):  
Excited State ◽  
Electronically Excited State ◽  
Organic Photochemistry ◽  
Electronically Excited
Sign in / Sign up

Export Citation Format

Share Document