Intermolecular interactions in some pyridazinium ylides solutions

Dorohoi, Dana Ortansa; Holban, Viorel

doi:10.1016/0022-2860(93)80033-r

Cited by 20 publications

(5 citation statements)

References 3 publications

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“…In some solutions, specific (short-range or quasichemical) interactions of the hydrogen bond type or of that of proton or electron transfer can act between some parts of molecules [18][19][20].…”

Section: Resultsmentioning

confidence: 99%

“…The dipolar moment of pyridazinium ylides diminishes by excitation [3,14]. So, the solvation energy in their ground state is bigger than that corresponding to their excited state [18][19][20]. The ICT absorption bands of pyridazinium ylides shift to the blue side (See Table 2), when they pass from a non-polar to a polar solvent or from an aprotic to a protic solvent.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Interaction Energy in Pairs of Pyridazinium Ylide−Solvent Molecules Estimated by Spectral Means within the Cell Ternary Solution Model

Avădanei

Dorohoi

2012

Ukr. J. Phys.

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Ternary solutions of three carbanion disubstituted pyridazinium ylides in a binary solvent containing two kinds of miscible simple liquids (active and inactive ones from the point of view of intermolecular interactions) are studied. Electronic absorption spectra are used to estimate the average statistical weights of the two solvents in the first solvation sphere of pyridazinium ylide molecules. This sphere contains a higher number of active solvent molecules than the rest of the solution. The relation established between the average statistical weights in the first solvation sphere and the molar concentrations of the two solvents in the solution allows us to evaluate the interaction energy in molecular pairs of the type pyridazinium ylide--active solvent and pyridazinium ylide–inactive solvent.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Interaction Energy in Pairs of Pyridazinium Ylide−Solvent Molecules Estimated by Spectral Means within the Cell Ternary Solution Model

Avădanei

Dorohoi

2012

Ukr. J. Phys.

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“…All pyridazinium ylids have a visible absorption band due to an intramolecular charge transfer (ICT) from carbanion to heterocycle [30][31][32][33][34]. This band is extremely sensitive to the solvent nature.…”

Section: Introductionmentioning

confidence: 99%

Solvent scales used to study the intermolecular interactions in binary solutions of two p-aryl-pyridazinium methylids

Babusca

Dorohoi

2016

Spectrochimica Acta Part A: Molecular and Biomolecular Spectros

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“…Pyridazinium ylids 1,2 are amphionic compounds with a characteristic electronic absorption band in the visible range, assignable to an intramolecular charge transfer (ICT) from carbanion to heterocycle 3,4. This band is very sensitive to the carbanion substituents as well as to the heterocycle structure 5.…”

Section: Introductionmentioning

confidence: 99%

Thermal dimerization kinetics of 3‐(p‐bromo‐phenyl)‐pyridazinium benzoyl methylid in solutions

Melnig

Humelnicu

Dorohoi

2008

Int J of Chemical Kinetics

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3-( p-Bromo-phenyl)-pyridazinium-benzoyl methylid (BPPBM) participates in solution at 3 + 3 dipolar thermal dimerization that can be spectrally monitored by the extinction in its visible intramolecular charge transfer (ICT) band. The attenuation of ICT band intensity shows the decrease of the BPPBM concentration with the increasing of dimer concentration. The complex kinetics of light-assisted dimerization process was studied taking into account that the thermodynamic equilibrium is reached after more than 24 h. On the basis of general order of reaction theory, we found that the dimerization reaction must be described as a multistep mechanism. The rate constants of the dimerization reactions in ethanol (k = 0.00897 s −1 ) and benzene (k = 0.00774 s −1 ) solutions were correlated with the BPPBM and dimer structural features established by using the HyperChem 5.02 simulation program package. A kinetic mechanism of 3 + 3 dipolar thermal dimerization for the studied ylid is proposed.

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Intermolecular interactions in some pyridazinium ylides solutions

Cited by 20 publications

References 3 publications

Interaction Energy in Pairs of Pyridazinium Ylide−Solvent Molecules Estimated by Spectral Means within the Cell Ternary Solution Model

Interaction Energy in Pairs of Pyridazinium Ylide−Solvent Molecules Estimated by Spectral Means within the Cell Ternary Solution Model

Solvent scales used to study the intermolecular interactions in binary solutions of two p-aryl-pyridazinium methylids

Thermal dimerization kinetics of 3‐(p‐bromo‐phenyl)‐pyridazinium benzoyl methylid in solutions

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