Synthesis and characterization of dinuclear complexes of 3,3′,4,4′-tetraminobiphenyl with tetramminoruthenium and bis(bipyridine)ruthenium residues and their two- and four-electron oxidized products including a ZINDO study of orbital mixing as a function of ligand oxidation state †

1999 ◽  
pp. 2653-2667 ◽  
Author(s):  
Robert A. Metcalfe ◽  
Luiz C. G. Vasconcellos ◽  
Hameed Mirza ◽  
Douglas W. Franco ◽  
A. B. P. Lever
Keyword(s):  
Oxidation State ◽  
Synthesis And Characterization ◽  
Dinuclear Complexes ◽  
Orbital Mixing ◽  
Oxidized Products

Homoleptic Quasilinear Metal(I/II) Silylamides of Cr – Co with Phenyl and Allyl Functions – Impact of Oxidation State on Secondary Ligand Interactions

2021 ◽  
Author(s):  
Ruth Weller ◽  
Lutz Ruppach ◽  
Alena Shlyaykher ◽  
Frank Tambornino ◽  
Gunnar Werncke
Keyword(s):  
Oxidation State ◽  
Synthesis And Characterization ◽  
Ligand Interactions ◽  
Secondary Ligand

Herein we describe the synthesis and characterization of a variety of new quasilinear metal(I/II) silylamides of the type [M(N(Dipp)SiR3)2]0,− (M = Cr − Co) with different silyl substituents (SiR3 =...

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.

Dinuclear complexes with μ-cyano ligand. I. Synthesis and characterization of cis[(en)2XCrNCNi(CN)3]aq(X = F, Cl, Br)

1979 ◽  
Vol 36 ◽  
pp. 41-44 ◽  
Author(s):  
J. Ribas ◽  
J. Casabó ◽  
M. Serra ◽  
J.M. Coronas
Keyword(s):  
Synthesis And Characterization ◽  
Dinuclear Complexes

Synthesis and characterization of layered double hydroxides containing Nickel in unstable oxidation state + 3 in cationic sites

2018 ◽  
Vol 265 ◽  
pp. 332-338 ◽  
Author(s):  
I.G. Ryltsova ◽  
O.V. Nestroinaya ◽  
O.E. Lebedeva ◽  
F. Schroeter ◽  
F. Roessner
Keyword(s):  
Oxidation State ◽  
Layered Double Hydroxides ◽  
Synthesis And Characterization ◽  
Double Hydroxides

Synthesis of low-oxidation-state germanium clusters comprising a functional anchor group – synthesis and characterization of [(Ge0)5(Ge-R)3(Ge-(CH2)n-CHCH2)] with R = Si(SiMe3)3

2018 ◽  
Vol 47 (10) ◽  
pp. 3223-3226 ◽  
Author(s):  
Sabine Frischhut ◽  
Thomas F. Fässler
Keyword(s):  
Oxidation State ◽  
Synthesis And Characterization ◽  
Anchor Group ◽  
Low Oxidation State ◽  
Germanium Clusters

The first alkenyl-functionalized, uncharged deltahedral germanium clusters [{Si(SiMe3)3}3Ge9(CH2)nCHCH2] (n = 1 or 3) comprising five Ge0 atoms are presented.

Synthesis and Characterization of Simple Hydroxo- and Amido-Bridged Cobalt(III) Dinuclear Ions Missing from the Alfred Werner Collection

2009 ◽  
Vol 62 (10) ◽  
pp. 1308 ◽  
Author(s):  
W. Gregory Jackson
Keyword(s):  
Aqueous Solution ◽  
Synthesis And Characterization ◽  
Dinuclear Complexes ◽  
Triflic Acid ◽  
Peroxo Complexes ◽  
The Common ◽  
Alfred Werner

The unsymmetrical N,O-dibridging NO2– group in the threo (‘rac’) or erythro (‘meso’) isomers of [(en)2Co(μ-NH2,μ-NO2)Co(en)2]4+ is cleaved in hot triflic acid to yield a complex that is predominantly meso. This reacts in water to yield the new meso-[(en)2Co(μ-NH2,μ-OH)Co(en)2]4+ ion. The reactions of the threo- and erythro-μ-NO2– isomers in basic (0.1 M) aqueous solution are each retentive, giving the rac- and meso-[(en)2Co(μ-NH2,μ-OH)Co(en)2]4+ ions as products, respectively. The optically resolved erythro complex gives the achiral meso isomer, which completes the threo/rac and erythro/meso chemical correlations between the two series of dinuclear complexes; the meso synthesis completes the pair – the meso- and rac-[(en)2Co(μ-NH2,μ-OH)Co(en)2]4+ ions. In HCl, stable μ-Cl, μ-NH2 dinuclear ions are formed from these μ-NH2, μ-OH complexes, with retention. The peroxo or superoxo ions rac-[Co(en)2(μ-NH2,μ-O2)Co(en)2]n+ react with SnII to produce symmetrically bridged intermediates that decay to the common and new meso-[(en)2Co(μ-NH2,μ-OH)Co(en)2]4+ isomer on reaction in Me2SO. Both the rac and meso isomers of the μ-hydroxo-μ-peroxo complexes are also reduced by SnII to give intermediates that in Me2SO decay to the respective diols with retention. The new rac-[Co(en)2(μ-OH)2Co(en)2]4+ and meso-[(en)2Co(μ-NH2,μ-OH)Co(en)2]4+ isomers complete the characterization of rac/meso pairs in both systems. The corresponding μ-sulfate pairs are also reported.

Co-Containing LDHs Synthesized by the Microwave-Hydrothermal Method

2006 ◽  
Vol 514-516 ◽  
pp. 1241-1245
Author(s):  
Patricia Benito ◽  
Maria Herrero ◽  
Francisco Martin Labajos ◽  
Vicente Rives
Keyword(s):  
Oxidation State ◽  
Layered Double Hydroxides ◽  
Treatment Time ◽  
Synthesis And Characterization ◽  
Thermal Treatments ◽  
Microwave Hydrothermal ◽  
Microwave Hydrothermal Method ◽  
Divalent Cobalt ◽  
Double Hydroxides

The synthesis and characterization of Co,Al Layered Double Hydroxides (LDHs) containing carbonate is reported. The solids have been submitted to several thermal treatments, hydrothermal and microwave-hydrothermal, modifying both the treatment time and temperature, with the main aim of studying their influence on the crystallinity of the solids and on the stabilization of divalent cobalt oxidation state. The results show that whichever the temperature and time used the only phase detected was the hydrotalcite, and that the cobalt cations keep the divalent oxidation state.

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