scholarly journals Molecular Spectra Calculations Using an Optimized Quasi-Regular Gaussian Basis and the Collocation Method

2021 ◽  
Author(s):  
Shane W. Flynn ◽  
Vladimir A. Mandelshtam
Keyword(s):  
Collocation Method ◽  
Molecular Spectra

PHT-Spline-Based Enhanced Isogeometric Collocation Method

2018 ◽  
Vol 30 (4) ◽  
pp. 702
Author(s):  
Yue Jia ◽  
Anitesuc Cosmin ◽  
Jessica Zhang Yongjie ◽  
Gang Xu ◽  
Chun Li ◽  
...  
Keyword(s):  
Collocation Method

Reaction of organolithium compounds with 1-substituted 2,4,6-triphenylpyridinium perchlorates

1989 ◽  
Vol 54 (7) ◽  
pp. 1880-1887 ◽  
Author(s):  
Marián Schwarz ◽  
Josef Kuthan
Keyword(s):  
Visible Range ◽  
Molecular Spectra ◽  
Organolithium Compounds ◽  
Phenylmagnesium Bromide

The reaction of organolithium compounds with 1-substituted 2,4,6-triphenylpyridinium perchlorates Ia-Ic produces mixtures of 1,4-dihydropyridines IIa-IIe and 1,2-dihydropyridines IIIa-IIIe. Analogous reactions of phenylmagnesium bromide with compounds Ia-Ic proceed with very low conversions (less than 1%). Photochromism in visible range is observed only with the compounds II which have two aromatic substituents at 4-position, whereas compounds III and IId show no visible photochromism. The molecular spectra of the compounds newly prepared are discussed.

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