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Synthesis, Thermal Behaviors and Dehydrogenation Kinetics Studies on Lithiated Ethylenediamine



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


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 LinNn 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.
Chemistry-A European Journal


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


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], (Accessed April 19, 2024)
Created October 12, 2014, Updated October 12, 2021