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Synthesis, Thermal and Crystallographic analysis of 1,1’-diylbis(2-methyl-4-phenylene)bis(2-nitrobenzoate)cyclohexane

Bhavin B. Dhaduk, Chirag B. Patel, Parsania P. H.

International Letters of Chemistry, Physics and Astronomy

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2015

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Vol. 45

32--41

EN

The crystal structure of 1,1’-diylbis (2-methyl-4-phenylene) bis (2-nitrobenzoate) cyclohexane (NBM-2) has been determined by X-ray crystallographic technique. Single crystals were grown by slow evaporation technique. NBM-2 crystallized in the triclinic crystal lattice having space group P-1. Both the phenyl rings are perpendicular to the cyclohexane ring having chair conformation. NBM-2 showed both inter-and intramolecular interactions. The structure of NBM-2 has also been supported by FT-IR, 1HNMR, 13C NMR, MS techniques. The thermal behaviour of NBM-2 were studied by TGA and DSC techniques at heating rate of 10oC min-1 in nitrogen atmosphere. Thermal stability and kinetic parameters were determined according to Anderson-Freeman method and discussed .

2

50 lat kauczuków fluorowych

Smorawiński A.

Elastomery

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2008

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T. 12, nr 1

3-14

PL

Elastomery fluorowe wyróżniają się szczególnie wysoką odpornością chemiczną i cieplną. Przedstawiono ich rozwój od narodzin ponad 50 lat temu, wracając uwagę na nowe monomery i wykorzystanie w technologii katalizatorów jednomiejscowych. Dokonano analizy składu podstawowych mieszanek i zasadniczych metod przetwórstwa tych elastomerów, weryfikując także ich najważniejsze pola zastosowań. Podano prognozę rozwoju wytwarzania kauczuków fluorowych na świecie i ich wykorzystanie na rynku polskim.

EN

Fluoroelastomers are distinguished for their particular high chemical and thermal resistance. In article is presented the birth of FKM 50 years ago considering the evolution of different monomers for creation of these elastomers. Are also analysed the basic receipts of FKM compounds, verifing too the principle fields of applications. There is given the forecast for the production of fluoroeastomers worldwide including consumption in polish market.

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Condensation of Phenol with Methyl Pyruvate

Nowakowska E., Zaleski J., Kyzioł J. B.

Polish Journal of Chemistry

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2001

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Vol. 75, nr 3

419-428

EN

Methyl pyruvate reacts with phenol, in the presence of hydrogen chloride, yielding 3-(4-hydroxyphenyl)-3-methyl-2-coumaranone (1a), methyl 2,2-bis-(4-hydroxyphenyl)- propionate (2a) and methyl 2-(4-hydroxyphenyl)-2-(2-hydroxyphenyl)-propionate (3a). The structure of 1a was determined by the X-ray diffraction method and that of 2a was based on the spectral data. The latter compound was not isolated, its structure (3a) was assigned basing on the GCMS analyses and analogy with the compounds 1a and 2a. The crystal and molecular structure of racemic 3-(4-acetoxyphenyl)-3-methyl-2- coumaranone (1b) was determined at room temperature. The triclinic unit cell contains a couple of enantiomeric molecules connected by weak C-H ....O hydrogen bonds.