Substituent Effects on the Lifetimes and Reactivities of Arylnitrenium Ions Studied by Laser Flash Photolysis and Photothermal Beam Deflection

1996 ◽  
Vol 118 (34) ◽  
pp. 8127-8135 ◽  
Author(s):  
Rebecca J. Robbins ◽  
David M. Laman ◽  
Daniel E. Falvey
Keyword(s):  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Substituent Effects ◽  
Laser Flash ◽  
Beam Deflection ◽  
Arylnitrenium Ions

Structures of Reactive Nitrenium Ions:  Time-Resolved Infrared Laser Flash Photolysis and Computational Studies of SubstitutedN-Methyl-N-arylnitrenium Ions

2000 ◽  
Vol 122 (34) ◽  
pp. 8271-8278 ◽  
Author(s):  
Sanjay Srivastava ◽  
Patrick H. Ruane ◽  
John P. Toscano ◽  
Michael B. Sullivan ◽  
Christopher J. Cramer ◽  
...  
Keyword(s):  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Laser Flash ◽  
Infrared Laser ◽  
Computational Studies ◽  
Time Resolved ◽  
Nitrenium Ions ◽  
Arylnitrenium Ions

Substituent effects in the photochemistry of 5-aryl-3,3-diphenyl-2(3H)-furanones. Steady-state and laser flash photolysis studies

1988 ◽  
Vol 53 (25) ◽  
pp. 5826-5831 ◽  
Author(s):  
S. Pratapan ◽  
K. Ashok ◽  
D. R. Cyr ◽  
P. K. Das ◽  
M. V. George
Keyword(s):  
Steady State ◽  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Substituent Effects ◽  
Laser Flash

Photogenerated Arylnitrenium Ions: Reactions of N-tert-Butyl(4-substituted 2-acetylphenyl)nitrenium Ions with Alcohols and Water Studied by Laser Flash Photolysis

1995 ◽  
Vol 117 (24) ◽  
pp. 6544-6552 ◽  
Author(s):  
Rebecca J. Robbins ◽  
Lucie L.-N. Yang ◽  
Gary B. Anderson ◽  
Daniel E. Falvey
Keyword(s):  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Laser Flash ◽  
Nitrenium Ions ◽  
Tert Butyl ◽  
Arylnitrenium Ions

Substituent effects on silene reactivity — Reactive silenes from photolysis of phenylated tri- and tetrasilanes

2008 ◽  
Vol 86 (12) ◽  
pp. 1105-1117 ◽  
Author(s):  
William J Leigh ◽  
Andrey G Moiseev ◽  
Eugenie Coulais ◽  
Farahnaz Lollmahomed ◽  
Mohammad S Askari
Keyword(s):  
Phenyl Ring ◽  
Kinetic Data ◽  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Substituent Effects ◽  
Laser Flash ◽  
Acetonitrile Solution ◽  
Ortho Position ◽  
Absolute Rate ◽  
Reported Data

Laser flash photolysis of 2-phenylheptamethyltrisilane (5d), 2,2-diphenylhexamethyltrisilane (5e), and phenyltris(trimethylsilyl)silane (5f) in hexane and acetonitrile solution affords strong, long-lived transient absorptions centered in the 440–470 nm range, which are assigned to the transient silenes formed via [1,3]-trimethylsilyl migration into the ortho-position of a phenyl ring on the basis of their UV–vis spectra and kinetic data for their reactions with methanol (MeOH), acetic acid (AcOH), acetone, 2,3-dimethyl-1,3-butadiene (DMB), carbon tetrachloride (CCl4), and oxygen. The silene derivatives are formed along with the corresponding silylenes (SiMePh, SiPh2, and Si(SiMe3)Ph, respectively) upon photolysis of these compounds in solution, and indeed, weak, short-lived transient absorptions assignable to the silylenes can also be detected in laser photolysis experiments with the three compounds in hexane, superimposed on the much more prominent absorptions due to the silenes. The silylene absorptions are quenched by MeOH and triethylsilane (Et3SiH) with absolute rate constants varying over the narrow ranges of (1.1–1.8) × 1010 (mol/L)–1 s–1 and (2.5–3.6) × 109 (mol/L)–1 s–1, respectively, in excellent agreement with previously reported values for SiPh2 and SiMe2 under the same conditions. The kinetic data obtained for the silenes are compared to previously reported data for the reactions of the same substrates with the related silenes (6a–6c) formed by photolysis of pentamethylphenyl-, 1,1,1,2-tetramethyl-2,2-diphenyl-, and 1,1,1-trimethyl-2,2,2-triphenyldisilane (5a–5c, respectively) under similar conditions. The comparison provides the first systematic, quantitative assessment of the stabilizing effects of trialkylsilyl substitution at the silenic silicon atom in silene derivatives.Key words: silene, silylene, trisilane, tetrasilane, kinetics.

Photochemically Generated Arylnitrenium Ions:  Laser Flash Photolysis and Product Studies of the Photochemistry ofN-tert-Butyl-3-methyl-6-chloroanthranilium Ions

1996 ◽  
Vol 61 (9) ◽  
pp. 3195-3199 ◽  
Author(s):  
Dominic Chiapperino ◽  
Gary B. Anderson ◽  
Rebecca J. Robbins ◽  
Daniel E. Falvey
Keyword(s):  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Laser Flash ◽  
Tert Butyl ◽  
Arylnitrenium Ions

Laser flash photolysis study of substituent effects on the rate of 1,2-H migration in a series of benzylchlorocarbenes

1992 ◽  
Vol 114 (10) ◽  
pp. 3604-3607 ◽  
Author(s):  
Michael T. H. Liu ◽  
Roland Bonneau
Keyword(s):  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Substituent Effects ◽  
Laser Flash

ChemInform Abstract: Substituent Effects in the Photochemistry of 5-Aryl-3,3-diphenyl-2(3H)-furanones. Steady-State and Laser Flash Photolysis Studies.

ChemInform ◽  
1989 ◽  
Vol 20 (22) ◽  
Author(s):  
S. PRATAPAN ◽  
K. ASHOK ◽  
D. R. CYR ◽  
P. K. DAS ◽  
M. V. GEORGE
Keyword(s):  
Steady State ◽  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Substituent Effects ◽  
Laser Flash

Fast reactions of arylnitrenium ions with amino acids and proteins: a laser flash photolysis study

2006 ◽  
Vol 19 (5) ◽  
pp. 291-294 ◽  
Author(s):  
Selina I. Thomas ◽  
Daniel E. Falvey
Keyword(s):  
Amino Acids ◽  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Laser Flash ◽  
Fast Reactions ◽  
Arylnitrenium Ions

ChemInform Abstract: Photogenerated Arylnitrenium Ions: Reactions of N-tert-Butyl (2-Acetyl- 4-substituted)phenyl Nitrenium Ions with Alcohols and Water Studied by Laser Flash Photolysis.

ChemInform ◽  
2010 ◽  
Vol 26 (41) ◽  
pp. no-no
Author(s):  
R. J. ROBBINS ◽  
L. L.-N. YANG ◽  
G. B. ANDERSON ◽  
D. E. FALVEY
Keyword(s):  
Flash Photolysis ◽  
Laser Flash Photolysis ◽  
Laser Flash ◽  
Nitrenium Ions ◽  
Tert Butyl ◽  
Arylnitrenium Ions
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