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Synthesis and Structural Characterization of a New Alkaline Earth Imide: MgCa(NH) 2
Author(s) -
Liu Yongfeng,
Liu Tao,
Xiong Zhitao,
Hu Jianjiang,
Wu Guotao,
Chen Ping,
Wee Andrew T. S.,
Yang Ping,
Murata Kenji,
Sakata Ko
Publication year - 2006
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200600492
Subject(s) - chemistry , alkaline earth metal , octahedron , imide , crystallography , ternary operation , crystal structure , molar ratio , inorganic chemistry , alkali metal , polymer chemistry , organic chemistry , catalysis , computer science , programming language
The ternary imide of MgCa(NH) 2 has been successfully synthesized for the first time by the mechanochemical reaction of Mg(NH 2 ) 2 and CaH 2 at a molar ratio of 1:1. It was found that ca. four H atoms were desorbed per Mg(NH 2 ) 2 ‐CaH 2 after 72 h of ball milling leaving a solid residue with the chemical composition of MgCa(NH) 2 . The solid residue exhibits an imide N–H stretching vibration at 3151 cm –1 and a cubic CaNH‐like structure. In addition, X‐ray Absorption Fine Structure examination at the Ca K ‐edge indicates that six N atoms occupy the first coordination shell of the Ca center in an anticipated octahedral geometry, and Ca(Mg) atoms occupy the second coordination shell. The distances of Ca–N and Ca–Ca(Mg) in the newly formed MgCa(NH) 2 structure calculated by ESDs are 2.46 and 3.47 Å, respectively. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)