Photochemical Generation of Nitrenium Ions from Protonated 1,1-Diarylhydrazines

2004 ◽  
Vol 6 (25) ◽  
pp. 4671-4674 ◽  
Author(s):  
Arthur H. Winter ◽  
Selina I. Thomas ◽  
Andrew C. Kung ◽  
Daniel E. Falvey
Keyword(s):  
Nitrenium Ions ◽  
Photochemical Generation

scholarly journals Time-Resolved Spectroscopic Study of N,N-Di(4-bromo)nitrenium Ions in Selected Solutions

Molecules ◽  
2018 ◽  
Vol 23 (12) ◽  
pp. 3182 ◽  
Author(s):  
Lili Du ◽  
Xin Lan ◽  
Zhiping Yan ◽  
Ruixue Zhu ◽  
David Phillips
Keyword(s):  
Transient Absorption ◽  
Direct Detection ◽  
Reaction Pathway ◽  
Addition Reactions ◽  
Time Resolved ◽  
Nitrenium Ions ◽  
Future Studies ◽  
Nitrenium Ion ◽  
Design Time

Nitrenium ions are important reactive intermediates in chemistry and biology. In this work, femtosecond and nanosecond transient absorption (fs-TA and ns-TA) along with nanosecond time-resolved resonance Raman (ns-TR3) experiments were employed to examine the photochemical pathways of N-(4,4′-dibromodiphenylamino)-2,4,6-trimethylpyridinium BF4− (salt (DN) from just absorption of a photon of light to the production of the important N,N-di(4-bromophenyl)nitrenium ion 2. In acetonitrile (MeCN), the formation of halogenated diarylnitrenium ion 2 was observed within 4 ps, showing the vibrational spectra with strong intensity. The nucleophilic adduct reaction of ion 2 with H2O was also examined in aqueous solutions. The direct detection of the unique ortho adduct intermediate 3 shows that there is an efficient and exclusive reaction pathway for 2 with H2O. The results shown in this paper give new characterization of 2, which can be used to design time-resolved spectroscopy investigations of covalent addition reactions of nitrenium ions with other molecules in future studies.

Nitrenium ions and trivalent boron ligands as analogues of N-heterocyclic carbenes in olefin metathesis: a computational study

2015 ◽  
Vol 44 (46) ◽  
pp. 20021-20026 ◽  
Author(s):  
A. Pazio ◽  
K. Woźniak ◽  
K. Grela ◽  
B. Trzaskowski
Keyword(s):  
Olefin Metathesis ◽  
Computational Study ◽  
Heterocyclic Carbenes ◽  
Mechanistic Study ◽  
Nitrenium Ions ◽  
Nitrenium Ion ◽  
Metathesis Catalysts

A DFT mechanistic study reveals that nitrenium ion-modified Hoveyda-like complexes are good candidates for latent metathesis catalysts, while boron-modified systems are candidates for very fast metathesis catalysts.

Photochemical generation of benzene–naphthalene biplanemers

2005 ◽  
Vol 46 (30) ◽  
pp. 4975-4977 ◽  
Author(s):  
Derong Cao ◽  
Herbert Meier
Keyword(s):  
Photochemical Generation

Convenient Routes to Di-tert-butylsilanediyl: Chemical, Thermal and Photochemical Generation

1988 ◽  
Vol 27 (10) ◽  
pp. 1355-1356 ◽  
Author(s):  
Philip Boudjouk ◽  
Upasiri Samaraweera ◽  
Ratnasabapathy Sooriyakumaran ◽  
Jerzy Chrusciel ◽  
Kevin R. Anderson
Keyword(s):  
Photochemical Generation
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