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