Decomposition of Lithium Amide and Lithium Imide with and without Anion Promoter

2011 ◽  
Vol 50 (13) ◽  
pp. 8058-8064 ◽  
Author(s):  
Junqing Zhang ◽  
Yun Hang Hu
Keyword(s):  
Lithium Amide ◽  
Lithium Imide

scholarly journals Compositional flexibility in Li-N-H materials: implications for ammonia catalysis and hydrogen storage.

2021 ◽  
Author(s):  
Joshua Makepeace ◽  
Jake M Brittain ◽  
Alisha Sukhwani Manghnani ◽  
Claire Murray ◽  
Thomas J Wood ◽  
...  
Keyword(s):  
Energy Storage ◽  
Hydrogen Storage ◽  
Compositional Variation ◽  
Lithium Amide ◽  
Lithium Imide ◽  
Energy Storage Applications

Li-N-H materials, particularly lithium amide and lithium imide, have been explored for use in a variety of energy storage applications in recent years. Compositional variation within the parent lithium imide,...

Enhancement of Lithium Amide to Lithium Imide Transition via Mechanical Activation

2006 ◽  
Vol 110 (41) ◽  
pp. 20710-20718 ◽  
Author(s):  
Tippawan Markmaitree ◽  
Ruiming Ren ◽  
Leon L. Shaw
Keyword(s):  
Mechanical Activation ◽  
Lithium Amide ◽  
Lithium Imide

Enhancement of Lithium Amide to Lithium Imide Transition via Mechanical Activation.

ChemInform ◽  
2007 ◽  
Vol 38 (5) ◽  
Author(s):  
Tippawan Markmaitree ◽  
Ruiming Ren ◽  
Leon L. Shaw
Keyword(s):  
Mechanical Activation ◽  
Lithium Amide ◽  
Lithium Imide

scholarly journals A Mechanism for Nonstoichiometry in the Lithium Amide/Lithium Imide Hydrogen Storage Reaction.

ChemInform ◽  
2007 ◽  
Vol 38 (18) ◽  
Author(s):  
William I. F. David ◽  
Martin O. Jones ◽  
Duncan H. Gregory ◽  
Catherine M. Jewell ◽  
Simon R. Johnson ◽  
...  
Keyword(s):  
Hydrogen Storage ◽  
Lithium Amide ◽  
Lithium Imide

scholarly journals Ammonia decomposition catalysis using lithium–calcium imide

2016 ◽  
Vol 188 ◽  
pp. 525-544 ◽  
Author(s):  
Joshua W. Makepeace ◽  
Hazel M. A. Hunter ◽  
Thomas J. Wood ◽  
Ronald I. Smith ◽  
Claire A. Murray ◽  
...  
Keyword(s):  
High Temperature ◽  
High Temperatures ◽  
Powder Diffraction ◽  
Light Metal ◽  
Reaction Mass ◽  
Ammonia Decomposition ◽  
The Other ◽  
Lithium Amide ◽  
Lithium Imide

Lithium–calcium imide is explored as a catalyst for the decomposition of ammonia. It shows the highest ammonia decomposition activity yet reported for a pure light metal amide or imide, comparable to lithium imide–amide at high temperature, with superior conversion observed at lower temperatures. Importantly, the post-reaction mass recovery of lithium–calcium imide is almost complete, indicating that it may be easier to contain than the other amide–imide catalysts reported to date. The basis of this improved recovery is that the catalyst is, at least partially, solid across the temperature range studied under ammonia flow. However, lithium–calcium imide itself is only stable at low and high temperatures under ammonia, with in situ powder diffraction showing the decomposition of the catalyst to lithium amide–imide and calcium imide at intermediate temperatures of 200–460 °C.

A Mechanism for Non-stoichiometry in the Lithium Amide/Lithium Imide Hydrogen Storage Reaction

2007 ◽  
Vol 129 (6) ◽  
pp. 1594-1601 ◽  
Author(s):  
William I. F. David ◽  
Martin O. Jones ◽  
Duncan H. Gregory ◽  
Catherine M. Jewell ◽  
Simon R. Johnson ◽  
...  
Keyword(s):  
Hydrogen Storage ◽  
Lithium Amide ◽  
Lithium Imide

scholarly journals Lithium-mediated Ferration of Fluoroarenes

2020 ◽  
Vol 74 (11) ◽  
pp. 866-870
Author(s):  
Lewis C. H. Maddock ◽  
Alan Kennedy ◽  
Eva Hevia
Keyword(s):  
Hydrogen Atom ◽  
Organometallic Chemistry ◽  
Room Temperature ◽  
Structural Elucidation ◽  
Side Reactions ◽  
Metal Base ◽  
Lithium Amide ◽  
Mixed Metal ◽  
Important Challenge

While fluoroaryl fragments are ubiquitous in many pharmaceuticals, the deprotonation of fluoroarenes using organolithium bases constitutes an important challenge in polar organometallic chemistry. This has been widely attributed to the low stability of the in situ generated aryl lithium intermediates that even at –78 °C can undergo unwanted side reactions. Herein, pairing lithium amide LiHMDS (HMDS = N{SiMe3}2) with FeII(HMDS)2 enables the selective deprotonation at room temperature of pentafluorobenzene and 1,3,5-trifluorobenzene via the mixed-metal base [(dioxane)LiFe(HMDS)3] (1) (dioxane = 1,4-dioxane). Structural elucidation of the organometallic intermediates [(dioxane)Li(HMDS)2Fe(ArF)] (ArF = C6F5, 2; 1,3,5-F3-C6H2, 3) prior electrophilic interception demonstrates that these deprotonations are actually ferrations, with Fe occupying the position previously filled by a hydrogen atom. Notwithstanding, the presence of lithium is essential for the reactions to take place as Fe II (HMDS)2 on its own is completely inert towards the metallation of these substrates. Interestingly 2 and 3 are thermally stable and they do not undergo benzyne formation via LiF elimination.

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