1632-16-2Relevant articles and documents
Commercon et al.
, p. 1,4, 9 (1977)
Brace,N.O.
, p. 3197 - 3201 (1961)
Cahiez et al.
, p. 107,108, 113 (1976)
Catalytic dimerization reactions of α-olefins and α,ω-dienes with Cp2ZrCl2/poly(methylalumoxane): Formation of dimers, carbocycles, and oligomers
Christoffers,Bergman
, p. 4715 - 4716 (1996)
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Elongation and branching of a-olefins by two ethylene molecules
Dietel, Thomas,Lukas, Fabian,Kretschmer, Winfried P.,Kempe, Rhett
, p. 1021 - 1024 (2022/03/15)
a-Olefins are important starting materials for the production of plastics, pharmaceuticals, and fine and bulk chemicals. However, the selective synthesis of a-olefins from ethylene, a highly abundant and inexpensive feedstock, is restricted, and thus a broadly applicable selective a-olefin synthesis using ethylene is highly desirable. Here, we report the catalytic reaction of an a-olefin with two ethylene molecules. The first ethylene molecule forms a 4-ethyl branch and the second a new terminal carbon-carbon double bond (C2 elongation). The key to this reaction is the development of a highly active and stable molecular titanium catalyst that undergoes extremely fast b-hydride elimination and transfer.
Thermally induced structural transformations of linear coordination polymers based on aluminum tris(diorganophosphates)
D?bowski, Maciej,?okaj, Krzysztof,Ostrowski, Andrzej,Zachara, Janusz,Wiecińska, Paulina,Falkowski, Pawe?,Krztoń-Maziopa, Anna,Florjańczyk, Zbigniew
supporting information, p. 16480 - 16491 (2018/12/05)
The thermal transitions of inorganic-organic hybrid polymers composed of linear aluminum tris(diorganophosphate) chains with a general formula of catena-Al[O2P(OR)2]3 (where R = C1-C8 alkyl group or phenyl moiety) have been studied by means of DSC, powder XRD, TGA and TG-QMS, as well as optical spectroscopy. DSC and XRD reveal that most of them undergo reversible structural transformations in the solid state between ?100 and 200 °C caused by the changes in conformation of their organic substituents; however, a translational displacement of the rigid polymeric chains occurs only in the case of the derivative bearing long 2-ethylhexyl groups, which becomes liquid at about 140 °C. The thermal decomposition of the studied polymers begins between 200 and 265 °C depending on the type of organic substituent R decorating their aluminophospate core. TGA combined with mass spectrometry of the evolved gaseous products shows that the pyrolytic decomposition of Al[O2P(OR)2]3 proceeds either through β-elimination of olefin (for compounds with C2-C8 aliphatic ligands), or a homolytic cleavage of the P-OR bond (for methyl and phenyl derivatives); both processes are accompanied by condensation of the newly formed POH groups and liberation of water. Powder XRD, FTIR and SEM analyses of the solid residues indicate that thermolysis of Al[O2P(OR)2]3 accompanied by olefin elimination leads to the formation of condensed aluminum phosphates, mainly aluminum cyclohexaphosphate, exhibiting porous morphology. On the other hand, thermal degradation of methyl or phenyl derivatives results in amorphous aluminophosphate residues, and the latter contains conducting carbonaceous phases.
DIARYL AMINE ANTIOXIDANTS PREPARED FROM BRANCHED OLEFINS
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Paragraph 0058; 0059, (2017/02/09)
Diaryl amines are selectively alkylated by reaction with branched olefins, which olefins are capable of forming tertiary carbonium ions and can be conveniently prepared from readily available branched alcohols. The diaryl amine products are effective antioxidants and often comprise a high amount of di-alkylated diaryl amines and a low amount of tri- and tetra-alkylated diaryl amines.
