Donor-acceptor complexes of trimethylamine with selenium trioxide, sulphur trioxide, and sulphur dioxide

1981 ◽  
Vol 46 (11) ◽  
pp. 2600-2612 ◽  
Author(s):  
Jiří Toužín ◽  
Petr Bauer
Keyword(s):  
Sulphur Dioxide ◽  
Conductometric Titration ◽  
Normal Coordinate ◽  
Vibration Spectra ◽  
Compound C ◽  
Donor Acceptor ◽  
Important Intermediate ◽  
Structural Analogy ◽  
Sulphur Trioxide

Study of reaction course of trimethylamine with selenium trioxide by conductometric titration and vibration spectra of the products proved that the reaction produces, besides the known donor-acceptor complex (CH3)3N.SeO3, also the adduct (CH3)3N.S2O6 similar to that formed in the system pyridine-selenium trioxide. Although the latter adduct could not be isolated in pure state, the results obtained indicate its structural analogy to the compound C5H5N.Se2O6. In preparation of the both DA complexes of selenium trioxide and trimethylamine the adduct (CH3)3N.SO2 is an important intermediate whose vibration spectra were measured and interpreted, too. Comparison and characterization of bonding relations in the DA complexes (CH3)3N.SeO3 and (CH3)3N.SO3 were carried out on the basis of results of normal coordinate analysis.

Vibration spectra of imidodiselenate and imidodisulphate anions

1981 ◽  
Vol 46 (11) ◽  
pp. 2620-2632 ◽  
Author(s):  
Jiří Toužín ◽  
Antonín Růžička
Keyword(s):  
Raman Spectra ◽  
Normal Coordinate Analysis ◽  
Infrared And Raman Spectra ◽  
Potassium Salts ◽  
Normal Coordinate ◽  
Vibration Spectra

Infrared and Raman spectra of potassium salts of N(SeO3)23-, N(SO3)23-, and HN(SO3)22- anions have been measured. Normal coordinate analysis has been used for their interpretation and characterization of bonding relations in the anions studied.

scholarly journals Crystallographic and spectroscopic characterization of racemic Mosher's Acid

2020 ◽  
Vol 76 (7) ◽  
pp. 1143-1145
Author(s):  
Carolyn Z. Savich ◽  
Joseph M. Tanski
Keyword(s):  
Carboxylic Acid ◽  
Spectroscopic Characterization ◽  
Acid Group ◽  
Compound C ◽  
Unit Form ◽  
Derivatizing Agent ◽  
Donor Acceptor ◽  
Group A ◽  
Mosher’S Acid

The title compound, C10H9F3O3, represents the structure of racemic Mosher's Acid (systematic name: 3,3,3-trifluoro-2-methoxy-2-phenylpropanoic acid), a carboxylic acid that when resolved can be employed as a chiral derivatizing agent. The compound contains a carboxylic acid group, a methoxy group and a trifluoromethyl substituent on an asymmetric benzylic carbon atom. The two independent molecules in the asymmetric unit form a non-centrosymmetric homochiral dimer via intermolecularly hydrogen-bonded head-to-tail dimers with graph-set notation R 2 2(8) and donor–acceptor hydrogen-bonding distances of 2.6616 (13) and 2.6801 (13) Å.

Vibration spectra of sulphur tetranitride

1981 ◽  
Vol 46 (11) ◽  
pp. 2613-2619 ◽  
Author(s):  
Jiří Toužín
Keyword(s):  
Solid State ◽  
Raman Spectra ◽  
Normal Coordinate Analysis ◽  
Infrared And Raman Spectra ◽  
Normal Coordinate ◽  
Vibration Spectra

Available data on infrared and Raman spectra of S4N4 in solid state and solutions have been verified and completed. On the basis of normal coordinate analysis an attempt has been made to define with more precision the interpretation of vibration spectra of this compound given in earlier reports.

Synthesis and Characterization of a New Donor–Acceptor Conjugated Polymer and Polymer∕Ag Nanocomposites

2011 ◽  
Author(s):  
M. G. Murali ◽  
D. Udayakumar ◽  
P. Predeep ◽  
Mrinal Thakur ◽  
M. K. Ravi Varma
Keyword(s):  
Conjugated Polymer ◽  
Synthesis And Characterization ◽  
Donor Acceptor

4-(Piperidin-1-yl)pyridinium hexafluorophosphate at 150 K

2003 ◽  
Vol 59 (11) ◽  
pp. o622-o624 ◽  
Author(s):  
Bruce D. James ◽  
Siti Mutrofin ◽  
Brian W. Skelton ◽  
Allan H. White
Keyword(s):  
Hydrogen Bonds ◽  
Structural Characterization ◽  
Title Compound ◽  
Ion Pairs ◽  
Piperidine Ring ◽  
Torsion Angles ◽  
Compound C ◽  
Counter Ions

Structural characterization of the title compound, C10H15N2 +·PF6 −, shows it to be ionic, with the pyridine rather than the piperidine N atom being protonated and forming hydrogen bonds to the counter-ions, resulting in two independent ion pairs. A number of unusual features are noted, in particular the remarkably close inter-ring hydrogen contacts [1.97 (3)–2.00 (3) Å] and the considerable differences in the pair of cations, in respect of the torsion angles within the piperidine ring involving the bonds to either side of the N atom.

The absorption spectrum of SO and the flash photolysis of sulphur dioxide and sulphur trioxide

1959 ◽  
Vol 249 (1259) ◽  
pp. 498-512 ◽  
Keyword(s):  
Absorption Spectrum ◽  
Dissociation Energy ◽  
Sulphur Dioxide ◽  
Flash Photolysis ◽  
Ultra Violet ◽  
Vibrationally Excited ◽  
A Value ◽  
Continuous Absorption ◽  
Sulphur Trioxide ◽  
Normal Spectrum

The flash photolysis of sulphur dioxide under adiabatic conditions results in the complete temporary disappearance of its spectrum , which then slowly regains its original intensity over a period of several milliseconds. Simultaneously with the disappearance of the sulphur dioxide spectrum a continuous absorption appears in the far ultra-violet and fades slowly as the sulphur dioxide reappears. It is shown that the effect of the flash is thermal rather than photochemical, and the possibility of the existence of an isomer of sulphur dioxide at high temperatures is discussed; the disappearance of the normal spectrum on flashing is explained in this way. Several previously unrecorded bands of SO observed in the photolysis indicate that the vibrational numbering of its spectrum should be revised by the addition of 2 to the present values of v' . This leads to a value of the dissociation energy of 123.5 kcal. In formation about the levels v' = 4, 5 and 6 has also been obtained. The isothermal flash photolysis of sulphur trioxide results in the appearance of vibrationally excited SO, and the primary photochemical step in this reaction is discussed.

scholarly journals 2,6-Di(thiophenyl)-1,5-dihydrodipyrrolopyrazine (DT-DPP) structural isomers as donor–acceptor–donor molecules and their optoelectronic investigation

RSC Advances ◽  
2017 ◽  
Vol 7 (62) ◽  
pp. 39228-39236 ◽  
Author(s):  
Puttavva Meti ◽  
Young-Dae Gong
Keyword(s):  
Synthesis And Characterization ◽  
Coupling Reactions ◽  
Structural Isomers ◽  
Donor Acceptor ◽  
Optoelectronic Applications

We report the synthesis and characterization of two new D–A–D molecules via Pd catalyzed C–C and C–N coupling reactions. This illustrates the potential of DT-DPP for promising optoelectronic applications.

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