Chapter 14 Benzene & Derivatives 苯及衍生物 14-1 Substitution Reactions of Benzene and Other Aromatic Compounds The remarkable stability of the unsaturated hydrocarbon benzene has been discussed in an earlier section. The chemical reactivity of benzene contrasts with that of the alkenes in that ...
Benzylation of aromatic compoundsMgGa2O4 (spinel)-MgO catalystThe MgGa 2O 4 (spinel)鈥揗gO catalyst (with Mg/Ga=2.0) requires a long induction period for exhibiting high catalytic activity in the benzylation of benzene, naphthalene, substituted benzenes and naphthalenes, depending upon the ...
benzenesinglet and triplet statesWhen molecules absorb radiation they generally are raised from their ground states to upper states of the same multiplicity. When exceptions to this rule are observed, either the absorption is extremely weak or there are perturbations of sufficient magnitude to causedoi...
The meaning of BENZENE RING is a structural arrangement of atoms in benzene and other aromatic compounds that consists of a planar symmetrical hexagon of six carbon atoms which derives added stability from the delocalization of certain bonding electrons
The catalytically active species in this catalyst are expected to be mainly Ga 2O 3 and GaCl 3 dispersed on MgO. 展开 关键词: Benzylation of benzene Benzylation of aromatic compounds MgGa2O4 (spinel)-MgO catalyst DOI: 10.1016/S1566-7367(01)00054-1 ...
Benzene(C6H6) is the best-known aromaticcompoundand the parent to which numerous other aromatic compounds are related. The sixcarbonsof benzene are joined in a ring, having the planar geometry of a regularhexagonin which all of the C—C bond distances are equal. The six π electrons circulate...
A test system for measurement of benzene and other aromatic compounds using a carbon 14 label is described. The biodegradability test of ecotoxicological profile analysis is performed in a closed system, thus allowing the investigation of volatile compounds. Results show that benzene is readily biodegra...
Accidental spills, industrial discharges and gasoline leakage from underground storage tanks have resulted in serious pollution of the environment with monoaromatic hydrocarbons, such as benzene, toluene, ethylbenzene and xylene (so-called BTEX). High concentrations of BTEX have been detected in soils, ...
(Elements & Compounds) a colourless flammable toxic aromatic liquid used in the manufacture of styrene, phenol, etc, as a solvent for fats, resins, etc, and as an insecticide. Formula: C6H6. See alsobenzene ring Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © Har...
Because the first-known derivatives of benzene were natural products extracted from balsams and impressed the discoverers because of their fragrant aromas, the group as a whole came to be known as aromatic compounds. The derivatives of benz 第二个小组由化合物组成获得从或与苯有关。 由于他们的...