Topic
Aromatic hydrocarbon
About: Aromatic hydrocarbon is a research topic. Over the lifetime, 5814 publications have been published within this topic receiving 55499 citations. The topic is also known as: arene & arenes.
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18 Mar 2004
TL;DR: In this paper, a polymerization catalyst comprising a transition metal compound of Formula A and an activating quantity of a Lewis acid activator, Formula (A), is presented. But the catalysts are useful for polymerising or oligomerising 1-olefins.
Abstract: A polymerisation catalyst comprising (1) a transition metal compound of Formula A, and optionally (2) an activating quantity of a Lewis acid activator, Formula (A), wherein Z is a five-membered heterocyclic group containing at least one carbon atom, at least one nitrogen atom and at least one other hetero atom selected from nitrogen, sulphur and oxygen, the remaining atoms in the ring being nitrogen or carbon; M is a metal from Group 3 to 11 of the Periodic Table or a lanthanide metal; E1 and E2 are divalent groups from (i) aliphatic hydrocarbon, (ii) alicyclic hydrocarbon, (iii) aromatic hydrocarbon, (iv) alkyl substituted aromatic hydrocarbon (v) heterocyclic groups and (vi) heterosubstituted derivatives of groups (i) to (v); D' and D2 are donor groups; X is an anionic group, L is a neutral donor group; n = m = zero or 1; y and z are zero or integers. The catalysts are useful for polymerising or oligomerising 1-olefins.
35 citations
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01 Apr 1955
TL;DR: The theoretical interpretation of aromatic hydrocarbon spectra in this paper was used as a basis for interpreting the effects of inductive substituents on the spectra of these molecules, and relations were derived between the intensity increase and the wavelength shift in the observed bands for various positions of substitution in benzene.
Abstract: The theoretical interpretation of aromatic hydrocarbon spectra in Paper I of this series is used as a basis for interpreting the effects of inductive substituents on the spectra of these molecules. It is shown that of the four main bands in the hydrocarbon spectrum, the α band of Clar is the most sensitive to substitution, and relations are derived between the intensity increase and the wavelength shift in the observed bands for various positions of substitution in benzene. The theoretical results are shown to be in reasonable agreement with available data on the fluorobenzenes.
35 citations
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TL;DR: In this paper, the influence of cross-linked structural types on the carbonized performance of air-blown pitches was also discussed in terms of carbonized reactivity and planarity of fused-ring aromatic compounds formed at the initial stage of carbonization.
35 citations
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TL;DR: In this article, a series of copolyimides containing such a diamine moiety were synthesized and the crosslinking behaviors of these copolyIMides were studied by differential scanning calorimetry and infrared measurements.
35 citations
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TL;DR: In this article, the phase behavior of a mixture of aliphatic and aromatic compounds was analyzed using the non-random two-liquid (NRTL) and UNIversal QUAsiChemical (UNIQUAC) thermodynamic models.
35 citations