Co–Ln Mixed-Metal Phosphonate Grids and Cages as Molecular Magnetic Refrigerants

2012 ◽  
Vol 134 (2) ◽  
pp. 1057-1065 ◽  
Author(s):  
Yan-Zhen Zheng ◽  
Marco Evangelisti ◽  
Floriana Tuna ◽  
Richard E. P. Winpenny
Keyword(s):  
Mixed Metal ◽  
Metal Phosphonate

A New Porous Ni‐W Mixed Metal Phosphonate Open Framework Material for Efficient Photoelectrochemical OER

ChemCatChem ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 1504-1511 ◽  
Author(s):  
Debabrata Chakraborty ◽  
Sanjib Shyamal ◽  
Asim Bhaumik
Keyword(s):  
Mixed Metal ◽  
Open Framework ◽  
Metal Phosphonate

scholarly journals Four CoII-GdIII mixed-metal phosphonate clusters as molecular magnetic refrigerants

2016 ◽  
Vol 453 ◽  
pp. 142-148 ◽  
Author(s):  
Xiaoyan Tang ◽  
Wenpeng Ye ◽  
Jingkun Hua ◽  
Ming Chen ◽  
Hongjian Cheng ◽  
...  
Keyword(s):  
Mixed Metal ◽  
Metal Phosphonate

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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