Thermal decomposition of metal complexes—VI some ammine cobalt (II) complexes

Wendlandt, W.W.; Smith, J.P.

doi:10.1016/0022-1902(63)80032-9

Cited by 25 publications

(3 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…). Numerous complexes have been successfully synthesized and studied by numerous groups such as Cu(NH 3 ) 4 ( NO 3 ) 2 [19][20][21][22], Co(NH 3 ) 6 (NO 3 )) 2 [23,24], Mg(NH 3 ) 6 (NO 3 ) 2 [25,26],…”

Section: Introductionmentioning

confidence: 99%

New coordination complexes-based gas-generating energetic composites

Sevely

Julien

et al. 2020

Combustion and Flame

View full text Add to dashboard Cite

To reduce the size inconvenience of airbag systems employed in human-body protection devices while maintaining comparable gas generation performance, a new family of gas-generating energetic composites are proposed mixing Al/CuO nanothermite with copper complex (Cu(NH3)4(NO3)2) known for its propensity to generate gases (0.03 mol/g) such as N 2 , O 2 , N 2 O through exothermic chemical decomposition (300 J/g). The aluminum (Al)/Copper oxide (CuO) couple, known as the most widely studied nanomaterial for thermite reactions, releasing a high energy, mostly heat, through chemical reaction, is employed as a source of heat to trigger and sustain the decomposition of Cu(NH3)4(NO3)2 complex. This work permits developing a new family of gasgenerating energetic composites that takes advantage of specific chemical and thermal properties of both materials. We demonstrate its capability to tune the pressurization rate, burn rate and pressure peak by varying the Al/CuO over Cu(NH3)(NO2)2 mass ratio. The peak pressure of Cu(NH3)4(NO3)2/Al/CuO energetic composites reaches 12 MPa/g.cm 3 in a close volume, which is 3.3

show abstract

Section: Introductionmentioning

confidence: 99%

New coordination complexes-based gas-generating energetic composites

Sevely

Julien

et al. 2020

Combustion and Flame

View full text Add to dashboard Cite

show abstract

“…The reduction of Co III ions into Co II ions during the thermal decomposition of [Co(NH 3 ) 6 Cl 3 ] and its decomposition intermediate [Co(NH 3 ) 5 Cl]Cl 2 is a well-known process, similarly to other hexaamminecobalt(III) salts, with N 2 and NH 4 Cl (NH 4 X salt) formation [66,67]. Since [hexaamminecobalt(II)] complexes are thermally less stable than the analogous Co III complexes [68], and N 2 formation was detected in the thermal decomposition reaction, we performed a temperature-limited decomposition under boiling toluene. The limit of this decomposition process is 110 • C, the boiling point of toluene, which is an upper temperature limit, because the exothermic reaction heat is absorbed by the evaporation of toluene.…”

Section: Isothermal Heat Treatments Of Compoundmentioning

confidence: 99%

“…The 2nd and 3rd decomposition steps of compound 1 belong to the further catalytic/ non-catalytic thermal decomposition of NH 4 3 and [Co(NH 3 ) 6 ]Cl 3 /[Co(NH 3 ) 6 ]Cl 2 precursors [66][67][68][70][71][72]. The source of N 2 O and H 2 O may be ammonium nitrate; NO can be formed via the reaction of ammonia and the oxide phases.…”

Section: Isothermal Decomposition Of Compound 1 In Boiling Toluenementioning

confidence: 99%

[Hexaamminecobalt(III)] Dichloride Permanganate—Structural Features and Heat-Induced Transformations into (CoII,MnII)(CoIII,MnIII)2O4 Spinels

et al. 2022

View full text Add to dashboard Cite

We synthesized and characterized (IR, Raman, UV, SXRD) hexaamminecobalt(III) dichloride permanganate, [Co(NH3)6]Cl2(MnO4) (compound 1) as the precursor of Co–Mn–spinel composites with atomic ratios of Co:Mn = 1:1 and 1:3. The 3D−hydrogen bond network includes N–HO–Mn and N–HCl interactions responsible for solid-phase redox reactions between the permanganate anions and ammonia ligands. The temperature-limited thermal decomposition of compound 1 under the temperature of boiling toluene (110 ∘C) resulted in the formation of (NH4)4Co2Mn6O12. which contains a todorokite-like manganese oxide network (MnII4MnIII2O1210−). The heat treatment products of compounds 1 and [Co(NH3)5Cl](MnO4)2 (2) synthesized previously at 500 ∘C were a cubic and a tetragonal spinel with Co1.5Mn1.5O4 and CoMn2O4 composition, respectively. The heating of the decomposition product of compounds 1 and 2 that formed under refluxing toluene (a mixture with an atomic ratio of Co:Mn = 1:1 and 1:2) and after aqueous leaching ((NH4)4Co2Mn6O12, 1:3 Co:Mn atomic ratio in both cases) at 500 ∘C resulted in tetragonal Co0.75Mn2.25O4 spinels. The Co1.5Mn1.5O4 prepared from compound 1 at 500 ∘C during the solid-phase decomposition catalyzes the degradation of Congo red with UV light. The decomposition rate of the dye was found to be nine times faster than in the presence of the tetragonal CoMn2O4 spinel prepared in the solid-phase decomposition of compound 2. The todorokite-like intermediate prepared from compound 1 under N2 at 115 ∘C resulted in a 54 times faster degradation of Congo red, which is a great deal faster than the same todorokite-like phase that formed from compound 2 under N2.

show abstract

High-spin, five-coordinate complexes of cobalt(II)with 2-substituted imidazoles

Dash

Pujari

1978

Transition Met Chem

View full text Add to dashboard Cite

SummaryA series of new five-coordinate complexes of cobalt(ll) of the type, dihalotris-(2-substituted imidazole)cobalt(II), of formulae Co(2-Melm)3 C12, Co(2-Etlm)3 X2 (X = CI, Br, I) and Co(2-i-Prlm)3 Iz, were synthesized and characterized by elemental analyses, electrolytic conductivity, diffuse reflectance as well as by solution spectra, i.r. and far i.r. spectra, x-ray powder pattern and magnetic susceptibility measurements. The mass spectra of the complexes did not exhibit peaks due to the molecular ions, but only showed the ligand fragmentation patterns. The t.g.a, and d.t.a, measurements were also carried out for the complexes.

show abstract

Thermal decomposition of metal complexes—VI some ammine cobalt (II) complexes

Cited by 25 publications

References 6 publications

New coordination complexes-based gas-generating energetic composites

New coordination complexes-based gas-generating energetic composites

[Hexaamminecobalt(III)] Dichloride Permanganate—Structural Features and Heat-Induced Transformations into (CoII,MnII)(CoIII,MnIII)2O4 Spinels

High-spin, five-coordinate complexes of cobalt(II)with 2-substituted imidazoles

Contact Info

Product

Resources

About