Matrix isolation studies of reactive intermediate complexes

1988 ◽  
Vol 9 (3) ◽  
pp. 233-269 ◽  
Author(s):  
Bruce S. Ault
Keyword(s):  
Matrix Isolation ◽  
Reactive Intermediate

Bent Cyclopenta-2,4-dienylideneketene: Spectroscopic and ab initio Study of Reactive Intermediate

1998 ◽  
Vol 63 (8) ◽  
pp. 1094-1106 ◽  
Author(s):  
Juliusz G. Radziszewski ◽  
Piotr Kaszynski ◽  
Anders Friderichsen ◽  
Jens Abildgaard
Keyword(s):  
Absorption Spectrum ◽  
Ab Initio ◽  
Phthalic Anhydride ◽  
Infrared Absorption ◽  
Triple Bond ◽  
Theoretical Study ◽  
Infrared Absorption Spectrum ◽  
Matrix Isolation ◽  
Reactive Intermediate ◽  
Ab Initio Study

Results of an experimental and theoretical study of cyclopenta-2,4-dienylideneketene (3), a highly unstable reactive intermediate, are reported. The ketene was prepared, under matrix isolation conditions at 4.2 or 10 K, by laser photocarbonylation of 1,2-didehydrobenzene (1) photogenerated earlier from phthalic anhydride (2). FTIR polarization measurements performed on partially photooriented samples of 3 immobilized in solid neon or argon provide infrared transition moment directions for most of the observed vibrations. Experimental results confirm that the ketene is bent, as predicted by ab initio calculations. Utilizing two isotopically modified 3, 3b and 3c, on the basis of the infrared absorption spectrum alone, we have analyzed and assigned its vibrations in a way, which leaves no doubt about the bent ketene structure. This work was motivated by a long standing confusion surrounding the assignments of the vibrations in 1,2-didehydrobenzene (1), especially of its "triple" bond stretch.

The conformational equilibria and infrared matrix isolation spectra of chloroacetyl fluoride and bromoacetyl fluoride

1993 ◽  
Vol 90 ◽  
pp. 1685-1701 ◽  
Author(s):  
AA El-Bindary ◽  
A Horn ◽  
P Klaeboe ◽  
CJ Nielsen
Keyword(s):  
Matrix Isolation ◽  
Conformational Equilibria

CHARACTERIZATION OF A HYDROGEN PEROXIDE-BENZENE COMPLEX USING MATRIX ISOLATION INFRARED SPECTROSCOPY

2019 ◽  
Author(s):  
Jay Amicangelo ◽  
Lia Totleben ◽  
Jacob Oslosky ◽  
Yudhishtara Payagala ◽  
Catherine Kaiser ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Infrared Spectroscopy ◽  
Matrix Isolation

Mechanism of the propagation step in the anionic polymerization of styrene

1980 ◽  
Vol 45 (4) ◽  
pp. 1047-1055 ◽  
Author(s):  
Miroslav Kašpar ◽  
Jiří Trekoval
Keyword(s):  
Experimental Data ◽  
Induction Period ◽  
Anionic Polymerization ◽  
Reactive Intermediate ◽  
Coordination Polymerization ◽  
Kinetic Dependence ◽  
Mathematical Solution ◽  
Slow Reaction

The paper is dealing with an investigation of the kinetic dependence of the propagation step in the anionic coordination polymerization of styrene in benzene at 303 K with "living" oligostyryllithium as initiator at the onset of the reaction. A short but distinct induction period was found, indicating a preceding slow reaction leading to the formation of a reactive intermediate, which behaves as the initiator of the reaction. Using results obtained in the first paper of this series, a new mechanism of propagation has been suggested, the mathematical solution of which is correlated with experimental data.

Matrix Isolation Spectroscopy and Conformational Analysis of Epichlorohydrin in Solid Parahydrogen

2021 ◽  
pp. 111451
Author(s):  
Termeh Bashiri ◽  
Brendan Moore ◽  
Pavle Djuricanin ◽  
Takamasa Momose
Keyword(s):  
Conformational Analysis ◽  
Matrix Isolation ◽  
Matrix Isolation Spectroscopy

scholarly journals Infrared matrix-isolation and theoretical studies of interactions between CH3I and water

2021 ◽  
Vol 1236 ◽  
pp. 130342
Author(s):  
Sophie Sobanska ◽  
Hanaa Houjeij ◽  
Stéphane Coussan ◽  
Christian Aupetit ◽  
Sonia Taamalli ◽  
...  
Keyword(s):  
Matrix Isolation ◽  
Theoretical Studies
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