934-74-7Relevant articles and documents
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Hoff
, p. 6046 (1958)
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McCaulay et al.
, p. 5808 (1957)
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One-pot production of hydrocarbon oil from poly(3-hydroxybutyrate)
Kang, Shimin,Yu, Jian
, p. 14320 - 14327 (2014/04/17)
Poly(3-hydroxybutyrate) (PHB) is an energy storage material of many microbial species, and has been found to be an effective feedstock for production of renewable hydrocarbon oils. A high oil yield (up to 38.2 wt%) was obtained in a phosphoric acid (H3PO4) solution at mild temperatures (165-240 °C). PHB and crotonic acid (C4H 6O2), a dominant thermal degradation product of PHB, were deoxygenated mainly via decarboxylation, generating similar liquid and gaseous products. Carbon dioxide and propylene were the major products in gas phase with little CO formation. The hydrocarbon oil (C4-C16) is a mixture of alkanes, alkenes, benzenes and naphthalenes. Aromatics (C10-C15) were the major hydrocarbons in a 100 wt% H3PO4 solution, while alkenes and alkanes (C4-C9) were favored in diluted solutions (50 wt% to 85 wt% H 3PO4). The concentration of H3PO4 was a key factor that affected the oil composition and yield. A highly efficient decarboxylation of crotonic acid at 220 °C for 3 hours resulted in 70.8 wt% of oxygen being removed as CO2 and 57.0 wt% of carbon being recovered as hydrocarbon oil. The H3PO4 solution can be repeatedly used for high yield oil production. This work shows that a type of new biological feedstock can be used to produce renewable hydrocarbon oil in an efficient one-pot reaction. This journal is the Partner Organisations 2014.
Anisotropy Effects of Conjugated Cyclic Systems, VI. Structure and Magnetic Anisotropy of Mesityl-substituted Ferrocens
Fuchs, Bernhard,Froehlich, Roland,Musso, Hans
, p. 1968 - 1982 (2007/10/02)
Two isomeric ferrocene derivatives have been obtained from 2-(2-ethyl-4,6-dimethylphenyl)-1,3-dimethylcyclopentadiene (22a).The exo,exo- (9) as well as the endo,endo-configuration (10) of these were determined by X-ray structure analysis.The assignment of the 1H NMR signals of the methyl groups in the spectrum of 1,1',3,3'-tetramethyl-2,2'-dimesitylferrocen (7) is derived from the spectra of 9 and 10.Signals of methyl groups in exo-position of the mesitylferrocene are shifted by -0.74 ppm to higher magnetic field.Signals of methyl groups in endo-position directed towards the iron atom are shifted downfield by +0.71 ppm.Therefore, ferrocene develops a diamagnetic anisotropy which is similar to that of benzene.
