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Raman studies of lattice vibrations in weak charge-transfer complexes: Naphthalene-tetrachlorophthalic anhydride

✍ Scribed by M.H. Kuok; E.C. Looi; S.H. Tang; C.T. Lin; C.A. Caetano

Publisher
Elsevier Science
Year
1984
Tongue
English
Weight
470 KB
Volume
109
Category
Article
ISSN
0009-2614

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✦ Synopsis

Low-frequency (H-150

cm-r) Raman spectra of naphthalene (N) I tetrachlorophthahc anhydride (TCPA) complex and its individual parent molecules were recorded at room temperature and at 77 Ii. The results suggest that the crystal structures for the compleses and for TCPA are in good agreement with those determined by X-ray studies. Within the temperature range studied, no orientational order-disorder phase transitions were observed for all the crystals investigated. The observed 26.7 cm-' lattice mode in N : TCPA might be assigned as the interaction coordinate for complex formation_ * Senior Teaching Fellow,.

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The low-frequency Raman spectra of tetrabromophthalic anhydride (TBPA) and its associated charge-transfer complex naphthalene-tetrabromophthalic anhydride (N:TBPA) have been recorded at 300 and 77 K. Nine lattice modes are identified for TBPA, the crystal structure of which is found to be unchanged

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## Abstract Thermodynamic and spectroscopic properties of the charge‐transfer complex acenaphtene‐tetrachlorophtalic anhydride were studied in different solvents. The corresponding thermodynamic and spectroscopic parameters were corrected for solvent competition. Only in this case were correlations