Search results for "Tetrachloroethane"
showing 10 items of 16 documents
Conformational properties of cyanomethoxy calix[4]arenes.
2005
O-Alkylation of the dinitro calix[4]arene 2, easily available by selective ipso-nitration of the di-cyanomethyl ether 1, with allylbromide (DMF/Cs2CO3) gave tetraethers 3 and 4 with anti- and syn-orientations of the two allyl ether residues. The two possible stereoisomers of 3 in the partial cone and 1,2-alternate conformation exist as an equilibrium mixture which could be quantitatively analysed by 1H NMR spectroscopy. The temperature dependence of this equilibrium leads to ΔH0 = − 7.6 to −9.7 kJ mol−1 in different solvents (tetrachloroethane, benzene, dimethylsulfoxide). Since 3(1,2-alt) could be obtained in pure form, its isomerisation to the equilibrium mixture with 3(paco) could be fol…
Comparative electrochemical treatments of two chlorinated aliphatic hydrocarbons. Time course of the main reaction by-products.
2011
The chlorinated aliphatic hydrocarbons conjugate toxicity with high chemical stability, bioaccumulation and long-range diffusivity. Chloroethanes are particularly ubiquitous in the industry and in household products, and their entry to the environment may entail potential risks for the living beings. At present, the US Environmental Protection Agency is carrying out the Endocrine Disruptor Screening Program (EDSP), where 1,2-dichloroethane (DCA) and 1,1,2,2-tetrachloroethane (TCA) are considered as priorities for their potential effects on the endocrine system. DCA is also found in the list of priority substances drawn up by the European Commission. To avoid the release of chloroethanes int…
Conformational polymorphs of 1,1,2,2-tetrachloroethane: pressure vs. temperature.
2011
Directional Cl···Cl type I and II interactions govern the low-density aggregation of 1,1,2,2-tetrachloroethane molecules in synclinal conformation in the crystalline state at low temperature, whereas the dense molecular packing in high-pressure is achieved for the antiperiplanar conformers and electrostatically less favored Cl···Cl contacts. The mechanism of transformation between loose and dense associations involves the collapse of Cl···Cl contacts and conformational conversion.
CCDC 811781: Experimental Crystal Structure Determination
2011
Related Article: M.Bujak, D.Blaser, A.Katrusiak, R.Boese|2011|Chem.Commun.|47|8769|doi:10.1039/c1cc10689a
CCDC 240839: Experimental Crystal Structure Determination
2006
Related Article: M.Bujak, A.Katrusiak|2004|Z.Kristallogr.|219|669|doi:10.1524/zkri.219.10.669.50821
CCDC 811782: Experimental Crystal Structure Determination
2011
Related Article: M.Bujak, D.Blaser, A.Katrusiak, R.Boese|2011|Chem.Commun.|47|8769|doi:10.1039/c1cc10689a
CCDC 1952601: Experimental Crystal Structure Determination
2019
Related Article: Roy Lavendomme, Florent Desroches, Steven Moerkerke, Filip Topić, Johan Wouters, Kari Rissanen, Michel Luhmer, Ivan Jabin|2020|Supramol.Chem.|32|23|doi:10.1080/10610278.2019.1679374
CCDC 746845: Experimental Crystal Structure Determination
2010
Related Article: M.Bujak, A.Katrusiak|2010|CrystEngComm|12|1263|doi:10.1039/b918360d
CCDC 746848: Experimental Crystal Structure Determination
2010
Related Article: M.Bujak, A.Katrusiak|2010|CrystEngComm|12|1263|doi:10.1039/b918360d
CCDC 746844: Experimental Crystal Structure Determination
2010
Related Article: M.Bujak, A.Katrusiak|2010|CrystEngComm|12|1263|doi:10.1039/b918360d