苯的结构(The Structure of Benzene) 苯是有机化学工业基本原料之一,是在1825年由英国物理学家和化学家法拉第通过分离煤焦油而首先发现的。1834年,德国科学家米希尔里希将其命名为苯。随后,苯的分子量和分子式也由化学家相继确定,但是如何确定苯的结构式却成了一个难题。 德国化学家凯库勒(F.A.Kekule,1829-1896)...
All give information concerning the molecular form and vibrations of the ground state of the molecule. Five benzenes have been examined moderately completely, whilst two others (formulae in parentheses) are under examination: C6H6, C6H5D, 1: 4-C"H4D2, 1:3: 5-C6H3D3, (1:2:4:5-C6H...
The electronic structure of benzene is a battleground for competing viewpoints of electronic structure, with valence bond theory localising electrons within superimposed resonance structures, and molecular orbital theory describing delocalised electrons. But, the interpretation of electronic structure in terms ...
The structure of benzene has been of interest since its discovery. German chemistsJoseph Loschmidt(in 1861) andAugust Kekule von Stradonitz(in 1866) independently proposed a cyclic arrangement of sixcarbonswith alternating single and double bonds. Kekule subsequently modified his structural formula to ...
The adsorption of 4-substituted benzo- and 5,5′-disubstituted dibenzocrown ethers from benzene by aerosil A-300 was studied. The ethers included a total of 45 compounds with diphenyl oxide, diphenyl, and diphenyl sulfide fragments. Analysis of the Henry coefficients (K H ) and the extent of...
The molecular structure of p-diaminobenzene has been determined by electron diffraction in the gas phase and by X-ray diffraction in the crystal, in order to measure accurately the distortions of the benzene ring caused by the substituents and to see whether these distortions are affected by inte...
glycolfor antifreeze andpolyesterfibres and films),acetaldehyde(converted toacetic acid), andvinyl chloride(converted topolyvinyl chloride). In addition to these compounds, ethylene andbenzenecombine to form ethylbenzene, which is dehydrogenated tostyrenefor use in the production ofplasticsandsynthetic...
The exhibition isstructuredaround the themes of work and leisure. 展览是围绕工作与休闲的主题来布置的。 牛津词典 Make use of the toys instructuredgroup activities. 在精心安排的分组活动中可以使用这些玩具。 牛津词典 The typical familystructureof Freud's patients involved two parents and two children....
SPIN㏒TATE EQUILIBRIUM IN BENZENEAND DICHLOROMETHANE㏒OLVATED TRIS(N,N㎝ORPHOLYLDITHIO... The magnetic behavior of the title solvates has been examined by means of the Mssbauer effect from room temperature down to 1.45 K. Complementary measureme... A Malliaris,V Papaefthimiou - 《Cheminform》...
of the activated carbon material can be described by Bangham kinetic equation,and the adsorption rate of activated carbon fibers increases with specific surface area and pore size.The adsorption rates of GAC are slower than ACF,and the SO2adsorption properties of GAC are worse than ACF due to ...