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Arxiv / №2 · 2026 / Maqola
01.00.00 – FIZIKA-MATEMATIKA FANLARI

OG‘IR GALOID ATOMLI AROMATIK MOLEKULALARNING TEBRANISH DINAMIKASI VA RAMAN SPEKTRLARIDA NAMOYON BO‘LISHI: BROMBENZOL VA ORTO-DIBROMBENZOL

Annotatsiya
O'ZBEKCHA

Ushbu tadqiqot brombenzol va orto-dibrombenzol molekulalari strukturasida og‘ir ga-loid atomlarining tebranish dinamikasini hamda Raman spektrlarida namoyon bo‘lish qonuniyatlarini o‘r-ganishga bag‘ishlangan. Eksperimental Raman spektrlari asosida molekulalarning simmetriyasi bilan bog‘liq tebranish chastotalari va intensivliklari aniqlanib, mono- va digaloidli aromatik molekulalar orasi-dagi spektral farqlar tahlil qilindi. Ortodibrombenzol molekulasida og‘ir atom effekti natijasida spektral chiziqlar sonining ortishi hamda intensivliklarning qayta taqsimlanishi kuzatildi. Olingan natijalar kvant-kimyoviy hisoblashlar yordamida izohlanib, eksperimental ma’lumotlar bilan yaxshi mos kelishini ko‘rsat-di. Tadqiqot natijalari aromatik galoid birikmalarning spektral xususiyatlarini chuqurroq talqin qilishga va molekulyar spektroskopiyada og‘ir atom ta’sirini baholashga ilmiy asos bo‘ladi.

Kalit so'zlar: Raman spektri, og‘ir atom effekti, molekulyar simmetriya, brombenzol, orto-dibrom-benzol.
РУССКИЙ

Данное исследование посвящено изучению колебательной динамики атомов тя-желых галоидов в структуре молекул бромбензола и орто-дибромбензола, а также закономернос-тей их проявления в спектрах Рамана. На основе экспериментальных спектров Рамана были оп-ределены колебательные частоты и интенсивности, связанные с симметрией молекул, и проана-лизированы спектральные различия между моно- и дигалоидароматическими молекулами. В мо-лекуле орто-дибромбензола наблюдалось увеличение числа спектральных линий и перераспреде-ление интенсивностей в результате эффекта тяжелого атома. Полученные результаты были ин-терпретированы с использованием квантово-химических расчетов и показали хорошее соответ-ствие экспериментальным данным. Результаты исследования обеспечат научную основу для более глубокой интерпретации спектральных свойств ароматических галоидных соединений и оценки эффекта тяжелого атома в молекулярной спектроскопии.

Ключевые слова: Рамановский спектр, эффект тяжелых атомов, молекулярная симметрия, бромбензол, орто-дибромбензол.
ENGLISH

This study investigates the vibrational dynamics of heavy halide atoms in the structure of bromobenzene and ortho-dibromobenzene molecules, as well as their manifestation in Raman spectra. Using experimental Raman spectra, vibrational frequencies and intensities related to molecular symmetry were determined, and spectral differences between mono- and dihaloaromatic molecules were analyzed. In the ortho-dibromobenzene molecule, an increase in the number of spectral lines and a redistribution of intensities were observed as a result of the heavy atom effect. The results were interpreted using quantum chemical calculations and showed good agreement with experimental data. The results of the study will provide a scientific basis for a more thorough interpretation of the spectral properties of aromatic halogen compounds and an assessment of the heavy atom effect in molecular spectroscopy.

Keywords: Raman spectrum, heavy atom effect, molecular symmetry, bromobenzene, ortho-dibromobenzene.
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