Ligated Aluminum Cluster anions, LAln− (n = 1-14, L = N[Si(Me)3]2)

2021 ◽  
Author(s):  
Gaoxiang Liu ◽  
Sandra M Ciborowski ◽  
Georgia R. Montone ◽  
William H Sawyer ◽  
Kiran Boggavarapu ◽  
...  
Keyword(s):  
Oxidation State ◽  
Cluster Anions ◽  
Aluminum Cluster ◽  
Wide Range ◽  
Low Oxidation State

A wide range of low oxidation state aluminum-containing cluster anions, LAln− (n = 1-14, L = N[Si(Me)3]2), were produced via reactions between aluminum cluster anions and hexamethyldisilazane (HMDS). These clusters...

Low oxidation state aluminum-containing cluster anions: Cp∗AlnH−, n = 1–3

2016 ◽  
Vol 145 (7) ◽  
pp. 074305 ◽  
Author(s):  
Gerd Ganteför ◽  
Bryan Eichhorn ◽  
Dennis Mayo ◽  
William H. Sawyer ◽  
Ann F. Gill ◽  
...  
Keyword(s):  
Oxidation State ◽  
Cluster Anions ◽  
Low Oxidation State

Low oxidation state aluminum-containing cluster anions: LAlH− and LAln− (n = 2–4, L = N[Si(Me)3]2)

2017 ◽  
Vol 19 (23) ◽  
pp. 15541-15548 ◽  
Author(s):  
Xinxing Zhang ◽  
Linjie Wang ◽  
Georgia R. Montone ◽  
Ann F. Gill ◽  
Gerd Ganteför ◽  
...  
Keyword(s):  
Oxidation State ◽  
Aluminum Hydride ◽  
Cluster Anions ◽  
Low Oxidation State

Several low oxidation state aluminum-containing cluster anions, LAlH− and LAln− (n = 2–4, L = N[Si(Me)3]2), were produced via reactions between aluminum hydride cluster anions, AlxHy−, and hexamethyldisilazane (HMDS).

scholarly journals Selenium– and tellurium–halogen reagents

2018 ◽  
Vol 3 (12) ◽  
Author(s):  
Tristram Chivers ◽  
Risto S. Laitinen
Keyword(s):  
Oxidation State ◽  
Halogen Bond ◽  
The Other ◽  
Oxidation States ◽  
Alkyl Aryl ◽  
Organic Selenium ◽  
Formal Oxidation State ◽  
Wide Range ◽  
Inorganic And Organic

Abstract Selenium and tellurium form binary halides in which the chalcogen can be in formal oxidation states (IV), (II) or (I). They are versatile reagents for the preparation of a wide range of inorganic and organic selenium and tellurium compounds taking advantage of the reactivity of the chalcogen–halogen bond. With the exception of the tetrafluorides, the tetrahalides are either commercially available or readily prepared. On the other hand, the low-valent species, EX2 (E = Se, Te; X = Cl, Br) and E2X2 (E = Se, Te; X = Cl, Br) are unstable with respect to disproportionation and must be used as in situ reagents. Organoselenium and tellurium halides are well-known in oxidation states (IV) and (II), as exemplified by REX3, R2EX2 and REX (R = alkyl, aryl; E = Se, Te; X = F, Cl, Br, I); mixed-valent (IV/II) compounds of the type RTeX2TeR are also known. This chapter surveys the availability and/or preparative methods for these widely used reagents followed by examples of their applications in synthetic inorganic and organic selenium and tellurium chemistry. For both the binary halides and their organic derivatives, the discussion is subdivided according to the formal oxidation state of the chalcogen.

scholarly journals Synthesis and Characterization of Super Bulky β-Diketiminato Group 1 Metal Complexes

Inorganics ◽  
2021 ◽  
Vol 9 (9) ◽  
pp. 72
Author(s):  
Dafydd D. L. Jones ◽  
Samuel Watts ◽  
Cameron Jones
Keyword(s):  
Nmr Spectroscopy ◽  
Alkali Metal ◽  
Metal Complexes ◽  
Oxidation State ◽  
Synthesis And Characterization ◽  
X Ray Crystallography ◽  
Low Oxidation State ◽  
Bulky Ligand ◽  
Group 1

Sterically bulky β-diketiminate (or Nacnac) ligand systems have recently shown the ability to kinetically stabilize highly reactive low-oxidation state main group complexes. Metal halide precursors to such systems can be formed via salt metathesis reactions involving alkali metal complexes of these large ligand frameworks. Herein, we report the synthesis and characterization of lithium and potassium complexes of the super bulky anionic β-diketiminate ligands, known [TCHPNacnac]− and new [TCHP/DipNacnac]− (ArNacnac = [(ArNCMe)2CH]−) (Ar = 2,4,6-tricyclohexylphenyl (TCHP) or 2,6-diisopropylphenyl (Dip)). The reaction of the proteo-ligands, ArNacnacH, with nBuLi give the lithium etherate compounds, [(TCHPNacnac)Li(OEt2)] and [(TCHP/DipNacnac)Li(OEt2)], which were isolated and characterized by multinuclear NMR spectroscopy and X-ray crystallography. The unsolvated potassium salts, [{K(TCHPNacnac)}2] and [{K(TCHP/DipNacnac)}∞], were also synthesized and characterized in solution by NMR spectroscopy. In the solid state, these highly reactive potassium complexes exhibit differing alkali metal coordination modes, depending on the ligand involved. These group 1 complexes have potential as reagents for the transfer of the bulky ligand fragments to metal halides, and for the subsequent stabilization of low-oxidation state metal complexes.

Amido Silicon Chalcogenide Compounds with Unprecedented Cluster Cores and Low Oxidation State Silicon Atoms

2019 ◽  
Vol 2019 (44) ◽  
pp. 4719-4726 ◽  
Author(s):  
Kevin Schwedtmann ◽  
Alexander Hepp ◽  
Kai Schwedtmann ◽  
Jan J. Weigand ◽  
Felicitas Lips
Keyword(s):  
Oxidation State ◽  
Low Oxidation State ◽  
Cluster Cores

Fragmentation dynamics of silicon cluster anions in collision with a silicon surface: contrast to aluminum cluster anions

1996 ◽  
Vol 262 (3-4) ◽  
pp. 269-273 ◽  
Author(s):  
Akira Terasaki ◽  
Hitoshi Yamaguchi ◽  
Hisato Yasumatsu ◽  
Tamotsu Kondow
Keyword(s):  
Silicon Surface ◽  
Silicon Cluster ◽  
Cluster Anions ◽  
Aluminum Cluster ◽  
Fragmentation Dynamics
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