Synthesis, Thermal Behaviors and Dehydrogenation Kinetics Studies on Lithiated Ethylenediamine

Published

October 13, 2014

Author(s)

Juner Chen, Guotao Wu, Zhitao Xiong, Hui Wu, Yong Shen Chua, Wei Zhou, Bin Liu, Xiaohua Ju, Ping Chen

Abstract

The lithiation of ethylenediamine by LiH is a step-wise process forming the partially lithiated intermidiates LiN(H)CH₂CH₂NH₂ and [LiN(H)CH₂CH₂NH₂][LiN(H)CH₂CH₂N(H)Li]₂ prior to the formation of dilithiated ethylenediamine LiN(H)CH₂CH₂N(H)Li. A reversible phase transformation between the partial and dilithiated species were observed. On dimensional Li_nN_n ladder and three dimensional network structures were found in the crystal structures of LiN(H)CH₂CH₂NH₂ and LiN(H)CH₂CH₂N(H)Li undergoes dehydrogenation with an activation energy of 181 plus or minus} 8 kj mol^-1 while the partially lithiated ethylenediamines were polymerized giving off ammonia at elevated temperatures. The dynamical dehydrogenation mechanism of dilithiated ethylenediamine was investiaged by means of the Johnson-Mehl-Avrami equation.

Citation

Chemistry-A European Journal

Volume

20

Pub Type

Journals

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Keywords

lithiated amine, dehydrogenation, ladder structure, Kissinger plot, JMA equation

Citation

Chen, J. , Wu, G. , Xiong, Z. , Wu, H. , Chua, Y. , Zhou, W. , Liu, B. , Ju, X. and Chen, P. (2014), Synthesis, Thermal Behaviors and Dehydrogenation Kinetics Studies on Lithiated Ethylenediamine, Chemistry-A European Journal, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=916642 (Accessed December 6, 2024)