Synthesis and thermal analysis of some oligomeric silicon derivatives of ferrocene

1983 ◽  
Vol 21 (8) ◽  
pp. 2529-2534 ◽  
Author(s):  
L. P. Asatiani ◽  
A. A. El-Agamey ◽  
M. A. Diab
Keyword(s):  
Thermal Analysis ◽  
Derivatives Of

Development of the room temperature protocol based on room temperature ionic liquids and surfactant ionic liquids for the synthesis of derivatives of 2-amino-thiazoles and thermo-physical analysis of the synthesized derivatives using TGA-DSC.

2020 ◽  
Vol 10 ◽  
Author(s):  
Chandrakant Sarode ◽  
Sachin Yeole ◽  
Ganesh Chaudhari ◽  
Govinda Waghulde ◽  
Gaurav Gupta
Keyword(s):  
Thermal Analysis ◽  
Heat Capacity ◽  
Ionic Liquids ◽  
Specific Heat ◽  
Specific Heat Capacity ◽  
Room Temperature ◽  
Heat Capacity Data ◽  
General Strategy ◽  
Capacity Data ◽  
Derivatives Of

Aims: To develop an efficient protocol, which involves an elegant exploration of the catalytic potential of both the room temperature and surfactant ionic liquids towards the synthesis of biologically important derivatives of 2-aminothiazole. Objective: Specific heat capacity data as a function of temperature for the synthesized 2- aminothiazole derivatives has been advanced by exploring their thermal profiles. Method: The thermal gravimetry analysis and differential scanning calorimetry techniques are used systematically. Results: The present strategy could prove to be a useful general strategy for researchers working in the field of surfactants and surfactant based ionic liquids towards their exploration in organic synthesis. In addition to that, effect of electronic parameters on the melting temperature of the corresponding 2-aminothiazole has been demonstrated with the help of thermal analysis. Specific heat capacity data as a function of temperature for the synthesized 2-aminothiazole derivatives has also been reported. Conclusion: Melting behavior of the synthesized 2-aminothiazole derivatives is to be described on the basis of electronic effects with the help of thermal analysis. Additionally, the specific heat capacity data can be helpful to the chemists, those are engaged in chemical modelling as well as docking studies. Furthermore, the data also helps to determine valuable thermodynamic parameters such as entropy and enthalpy.

scholarly journals SYNTHESIS, STRUCTURE AND THERMAL PROPERTIES OF RHENIUM CARBONYL CONTAINING HETEROBIMETALLIC DERIVATIVES OF VANADIUM (III)

2018 ◽  
Vol 15 (30) ◽  
pp. 193-200
Author(s):  
E. A. GULIYEVA ◽  
G. Z. SULEIMANOV
Keyword(s):  
Thermal Analysis ◽  
Thermal Properties ◽  
Bidentate Ligand ◽  
Target Product ◽  
Carbonyl Groups ◽  
Donor Ligand ◽  
Composition And Structure ◽  
Rhenium Carbonyl ◽  
Derivatives Of ◽  
Push Out

This paper describes the data on synthesis of bis(cyclopentadienyl)vanadium(III) of pentacarbonyl rhenium bistetrahydrofuranate complex with the reaction between dicyclopentadienylvanadium (III) chloride and rhenium sodiumpentacarbonyl in tetrahydrofurane (THF). Formed in this case the target product was separated from reaction mixture by extracting with hot hexane. Their reactionary ability in relation to protonic and aprotonic acids Lewis had been inverstigated. It is revealed, that at interaction of the above mentioned complexes with HCl there is a splitting Re-V bond with formation (C5H5)2VCl and HRe(CO)5; (C5H5)2VCl and HRe(CO)4PPh3 respectively. At interaction with HgCl2 also occurs having break V-Re bond and it turn out (C5H5)2VCl and (OC)5ReHgCl; (C5H5)2VCl and PPh3(OC)4ReHgCl. The interection of these complexes with ligands of various dentate is investigated. A monodentate liqand-triphenil phosphine (PPh3) substitutes one of carbonyl-groups in Re(CO)5) – fragment. Bidentate ligand- acetylacetone (acac) easily push out from coordination sphere vanadium more donor ligand cyclopentadienyl. The composition and structure of the complexes were characterized by the data of NMR, IR, EPR-spectroscopy and thermal analysis.

scholarly journals NMR Study of Intercalates and Grafted Organic Derivatives of H2La2Ti3O10

Molecules ◽  
2020 ◽  
Vol 25 (22) ◽  
pp. 5229
Author(s):  
Marina G. Shelyapina ◽  
Oleg I. Silyukov ◽  
Irina P. Lushpinskaia ◽  
Sergey A. Kurnosenko ◽  
Anton S. Mazur ◽  
...  
Keyword(s):  
Thermal Analysis ◽  
Solid State Nmr ◽  
Organic Molecules ◽  
Organic Residues ◽  
Organic Species ◽  
Nmr Study ◽  
Derivatives Of ◽  
Inorganic Matrix ◽  
Raman And Ir Spectroscopy ◽  
Covalently Bound

The protonated perovskite-like titanate H2La2Ti3O10 has been used to produce organic-inorganic hybrids with simple organic molecules: methylamine, methanol, monoethanolamine, and n-butylamine. The optimal pathways for the preparation of such hybrids are summarized. Solid-state NMR, combined with thermal analysis, Raman, and IR spectroscopy, has been applied to determine the bonding type in the obtained organic-inorganic hybrids. It has been found that, in the methanolic hybrid, the organic residues are covalently bound to the inorganic matrix. In contrast, in the methylamine and n-butylamine hybrids, the organic molecules are intercalated into the inorganic matrix in cationic forms. The structure of the monoethanolamine hybrid is composite and includes both the covalently bound and intercalated organic species.

scholarly journals GRADIENT-BASED OPTIMIZATION OF SPACECRAFT AND AIRCRAFT THERMAL DESIGN

Aviation ◽  
2020 ◽  
Vol 24 (3) ◽  
pp. 105-116
Author(s):  
Laurynas Mačiulis ◽  
Rimantas Belevičius
Keyword(s):  
Thermal Analysis ◽  
Thermal Control ◽  
Multidisciplinary Optimization ◽  
Thermal Design ◽  
Thermal Models ◽  
Computational Overhead ◽  
Gradient Based ◽  
Multidisciplinary System ◽  
Initial Starting ◽  
Derivatives Of

Steady-case thermal analysis plays an important role in dimensioning thermal control systems for spacecrafts and aircrafts. Usually a trial and error approach is used based on engineering judgement and experience. When thermal models become complex or there are conflicting thermal requirements, however, it becomes harder for an engineer to gain insight as to which design decisions will lead to better results. Numerical optimization, on the other hand, could provide a more robust approach for the thermal design of complex spacecraft or aircraft models. In this paper, we suggest a gradient-based multidisciplinary optimization of thermal models where the coupled derivatives of the multidisciplinary system are obtained with the adjoint method. We show that in the case of steady-state thermal analysis, there is an analytic solution of a partial derivatives of implicit heat-transfer equation that can be used to derive total derivatives of the system. We present a practical application of this method by solving a small interplanetary spacecraft thermal optimization problem consisting of one objective, 15 design variables, and 10 constraints. We found that by using gradient-based optimization with exact derivatives, the best results can be achieved by exploring the design space at multiple initial starting points without major computational overhead.

Sign in / Sign up

Export Citation Format

Share Document