Near IR spectroscopic studies on the interaction between acetamide and Ln(dpm)3 in carbon tetrachloride

Young Sang Choi, Hongsoon Kim, Jeong A. Yu, Sang-Won Lee, Jeunghee Park, Chang Ju Yoon

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Abstract

The interactions between Ln(dpm)3 [Ln3+ = Eu3+, Yb3+, Pr3+, Sm3+, Tb3+ and Ho3+; dpm=tris 2,2,6,6-tetramethylheptane-3,5-dionate] and acetamide in CCl4 solution were investigated using near IR absorption spectroscopy. From the measured 2 νc=o+ amide III combination band of acetamide in the region of 2130-2180 nm (4695-4587 cm-1), it was found that acetamide is coordinating through its carbonyl oxygen atom to Ln(dpm)3 [C=O⋯Ln(dpm)3)] and forms only 1:1 stoichiometric Ln(dpm)3- acetamide complex. The ΔH° values for the formation of Ln(dpm)3-acetamide obtained from the temperature studies are -39.1, -28.4, -25.5, -24.7, -21.1 and -17.7 kJ mol-1 for Eu(dpm)3, Yb(dpm)3, Pr(dpm)3, Sm(dpm)3, Tb(dpm)3 and Ho(dpm)3, respectively, which are larger than those of the hydrogen bond between amide and various hydrogen acceptors. Except Eu(dpm)3 and Yb(dpm)3, -ΔH° value increases as the ionic size increases.

Original languageEnglish
Pages (from-to)511-514
Number of pages4
JournalBulletin of the Korean Chemical Society
Volume17
Issue number6
Publication statusPublished - 1996 Dec 1

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Carbon Tetrachloride
Amides
Absorption spectroscopy
Hydrogen
Infrared spectroscopy
Hydrogen bonds
acetamide
Oxygen
Atoms
Temperature

ASJC Scopus subject areas

  • Chemistry(all)

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Near IR spectroscopic studies on the interaction between acetamide and Ln(dpm)3 in carbon tetrachloride. / Choi, Young Sang; Kim, Hongsoon; Yu, Jeong A.; Lee, Sang-Won; Park, Jeunghee; Yoon, Chang Ju.

In: Bulletin of the Korean Chemical Society, Vol. 17, No. 6, 01.12.1996, p. 511-514.

Research output: Contribution to journalArticle

Choi, Young Sang ; Kim, Hongsoon ; Yu, Jeong A. ; Lee, Sang-Won ; Park, Jeunghee ; Yoon, Chang Ju. / Near IR spectroscopic studies on the interaction between acetamide and Ln(dpm)3 in carbon tetrachloride. In: Bulletin of the Korean Chemical Society. 1996 ; Vol. 17, No. 6. pp. 511-514.
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AU - Yoon, Chang Ju

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