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

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

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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 ν_c=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 language	English
Pages (from-to)	511-514
Number of pages	4
Journal	Bulletin of the Korean Chemical Society
Volume	17
Issue number	6
Publication status	Published - 1996

ASJC Scopus subject areas

General Chemistry

Cite this

@article{1f90615e5bfc4c799179a5a66a4d5fb1,

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

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.",

author = "Choi, \{Young Sang\} and Hongsoon Kim and Yu, \{Jeong A.\} and Lee, \{Sang Won\} and Jeunghee Park and Yoon, \{Chang Ju\}",

year = "1996",

language = "English",

volume = "17",

pages = "511--514",

journal = "Bulletin of the Korean Chemical Society",

issn = "0253-2964",

publisher = "Wiley-Blackwell",

number = "6",

}

TY - JOUR

T1 - Near IR spectroscopic studies on the interaction between acetamide and Ln(dpm)3 in carbon tetrachloride

AU - Choi, Young Sang

AU - Kim, Hongsoon

AU - Yu, Jeong A.

AU - Lee, Sang Won

AU - Park, Jeunghee

AU - Yoon, Chang Ju

PY - 1996

Y1 - 1996

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/18444405253

UR - https://www.scopus.com/pages/publications/18444405253#tab=citedBy

M3 - Article

AN - SCOPUS:18444405253

SN - 0253-2964

VL - 17

SP - 511

EP - 514

JO - Bulletin of the Korean Chemical Society

JF - Bulletin of the Korean Chemical Society

IS - 6

ER -

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

Abstract

ASJC Scopus subject areas

Other files and links

Fingerprint

Cite this