Electronic Spectra of Cycl[3.3.2]azine and Related Compounds: Solvent Effect on Vibronic Couplings

2012 ◽  
Vol 116 (36) ◽  
pp. 9100-9109 ◽  
Author(s):  
Yasuhiro Shigemitsu ◽  
Motoyuki Uejima ◽  
Tohru Sato ◽  
Kazuyoshi Tanaka ◽  
Yoshinori Tominaga
Keyword(s):  
Solvent Effect ◽  
Electronic Spectra ◽  
Vibronic Couplings ◽  
Related Compounds

Comment on “Solvent Effect on the Electronic Spectra of Azine Dyes under Alkaline Condition”

2009 ◽  
Vol 113 (34) ◽  
pp. 9575-9576 ◽  
Author(s):  
Andrew Mills ◽  
David Hazafy ◽  
John A. Parkinson ◽  
Tell Tuttle ◽  
Michael G. Hutchings
Keyword(s):  
Solvent Effect ◽  
Electronic Spectra ◽  
Alkaline Condition

Protonation of purines and related compounds in dimethylsulfoxide and water

1985 ◽  
Vol 63 (6) ◽  
pp. 1228-1232 ◽  
Author(s):  
Robert L. Benoit ◽  
Danielle Boulet ◽  
Luc Séguin ◽  
Monique Fréchette
Keyword(s):  
Solvent Effect ◽  
Functional Groups ◽  
Thermodynamic Data ◽  
Ionization Constants ◽  
Enthalpies Of Transfer ◽  
Heats Of Solution ◽  
Bonding Properties ◽  
Related Compounds

The ionization constants of the conjugated acids BH+ of purine, adenine, 9-methyladenine, adenosine, guanine, and hypoxanthine, and of the related compounds imidazole, N-methylimidazole, benzimidazole, and 4-amino-2,6-dimethylpyrimidine have been determined potentiometrically in Me2SO. The heats of solution and the heats of protonation of most of these bases have been obtained by calorimetry. Some additional determinations were carried out in water so that thermodynamic data in Me2SO and in water could be compared. Our discussion of the solvent effect on these data is largely based on a consideration of the enthalpies of transfer of B and BH+ and emphasizes the contrasting H-bonding properties of the solvents and of the functional groups on the solutes B and BH+.

Electronic spectra and electronic structures of [2.2]paracyclophane and related compounds

1973 ◽  
Vol 46 (1) ◽  
pp. 1-15 ◽  
Author(s):  
Suehiro Iwata ◽  
Kiyokazu Fuke ◽  
Michiko Sasaki ◽  
Saburo Nagakura ◽  
Tetsuo Otsubo ◽  
...  
Keyword(s):  
Electronic Spectra ◽  
Electronic Structures ◽  
Related Compounds

Pyridyl enamines and dienamines as models of mycobacterial pigments

1970 ◽  
Vol 23 (10) ◽  
pp. 2109 ◽  
Author(s):  
GM Renwick
Keyword(s):  
Mycobacterium Tuberculosis ◽  
Electronic Spectra ◽  
Dissociation Constants ◽  
Related Compounds

N,N'-Tetramethylformamidinium perchlorate and its higher vinylogue react with 4-picolylsodium to yield 4-(2-dimethylaminovinyl)pyridine (1) and l-dimethyl-amino-4-(4-pyridyl)buta-1,3-diene (3), and with 2-picolylsodium to yield the 2-pyridine isomers (2) and (4). The N.M.R. spectra and dissociation constants of these products are reported. The electronic spectra of the bases, their mono- and di-cations, and of some related compounds are described, and comparisons are drawn with coloured alkaloids which are produced by Mycobacterium tuberculosis in the presence of isonicotinoylhydrazide.

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