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Исследование проявления парной ассоциации в ИК-спектрах пиридина методом функционала плотности

Исследование проявления парной ассоциации в ИК-спектрах пиридина методом функционала плотности

Abstract

The calculation of structure, frequencies of normal fluctuations and the strips intensity in IR-spectrums of five dimer of pyridine with hydrogen communication has been performed by the matrix isolation technique B3LYP/6-311+G (d, p). The number’s modeling of the difficult oscillatory contours in the pyridine’s IR-spectrum was executed taking into account the intermolecular interaction. It is shown that the hydrogen communications of the pair self-associatesthe brought the big contribution to formation of strips of the satellites complicating structure of oscillatory strips of monomeric pyridine in the matrix-isolated low-temperature IR-spectrum. The detailed interpretation of the low-temperature matrix isolated IR-spectrum of H5 D5 pyridine absorption is offered. Thermodynamic characteristics of complexes formation taking into account a basic peak-a-boo mistake are calculated.

Методом функционала плотности B3LYP/6-311+G(d, p) выполнен расчет структуры, частот нормальных колебаний и интенсивностей полос в ИК-спектрах пяти димеров пиридина с водородной связью. Выполнено моделирование ряда сложных колебательных контуров в ИК-спектре пиридина с учетом межмолекулярного взаимодействия. Показано, что большой вклад в формирование полос сателлитов, усложняющих структуру колебательных полос мономерного пиридина в матрично-изолированном низкотемпературном ИК-спектре, вносят водородосвязанные парные самоассоциаты. Предложена детальная интерпретация низкотемпературного матрично-изолированного ИК-спектра поглощения пиридина H5 и D5. Вычислены термодинамические характеристики образования комплексов с учетом базисной суперпозиционной ошибки.

Keywords

ИНФРАКРАСНАЯ (КОЛЕБАТЕЛЬНАЯ) СПЕКТРОСКОПИЯ, ИК-СПЕКТР, МЕТОД МАТРИЧНОЙ ИЗОЛЯЦИИ, infrared (oscillatory) spectroscopy

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average