title: Hydrogen sorption from the Mg(NH2)2-KH system and synthesis of an amide-imide complex of KMg(NH)(NH2).
abstract: The interaction between KH and Mg(NH(2))(2) is investigated. Results from temperature-programmed desorption measurements on samples of [Mg(NH(2))(2)][KH](x) (x=0.5, 1.0, and 2.0) indicated that dehydrogenation from [Mg(NH(2))(2)][KH] occurred through a two-step reaction with an onset temperature as low as 60 °C. Accompanied by hydrogen release, K(2)Mg(NH(2))(4) and MgNH successively developed at lower temperatures, whereas KMg(NH)(NH(2)) developed at higher temperatures. However, when dehydrogenation was conducted under isothermal and near-equilibrium conditions, a single-step reaction that led to the formation of KMg(NH)(NH(2)) was observed. KMg(NH)(NH(2)) is a new amide-imide complex. The synthesis of KMg(NH)(NH(2)) can be achieved either by dehydrogenation of the [Mg(NH(2))(2)][KH] mixture or by thermal decomposition of the [K(2)Mg(NH(2))(4)][Mg(NH(2))(2)] mixture.
authors.affiliation: Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, PR China.
authors.forename: Jianhui
authors.initials: J
authors.lastname: Wang
authors.forename: Guotao
authors.initials: G
authors.lastname: Wu
authors.forename: Yong Shen
authors.initials: YS
authors.lastname: Chua
authors.forename: Jianping
authors.initials: J
authors.lastname: Guo
authors.forename: Zhitao
authors.initials: Z
authors.lastname: Xiong
authors.forename: Yao
authors.initials: Y
authors.lastname: Zhang
authors.forename: Mingxia
authors.initials: M
authors.lastname: Gao
authors.forename: Hongge
authors.initials: H
authors.lastname: Pan
authors.forename: Ping
authors.initials: P
authors.lastname: Chen
mesh_terms: D000577:Amides / Q000737:chemistry*; D060326:Chemistry Techniques, Synthetic / Q000379:methods*; D006859:Hydrogen / Q000737:chemistry*; D007094:Imides / Q000737:chemistry*; D008274:Magnesium / Q000737:chemistry*; D013696:Temperature
chemical_list: D000577:Amides; D007094:Imides; D006859:Hydrogen; D008274:Magnesium