The crystal structure of pentamethylbenzene has been obtained for the first time with the use of synchrotron radiation, whilst the low-energy spectrum of lattice dynamics, dominated by the methyl group torsions, was obtained using inelastic neutron scattering. The effect of symmetry lowering by the...
This is the zeolite structure that has tubular one dimensional micro channels. Fig. 7A illustrates the successive reaction steps of the reaction. Toluene and methanol have to adsorb in close vicinity. Then of the different relative orientations with respect to each other the methyl group of ...
No rotational phase in compounds with the angle between the aromatic ring and nitro group planes equal or close to 90掳 has been found. The crystal structure of 1,3-DNTCB was determined. 1,3-DNTCB crystallizes in P 2 1 / c space group with Z = 4 molecules in a unit cell. DSC ...
trimethylbenzene, is hydrogenated in the presence of a crystalline aluminosilicate catalyst containing supported one or more metals selected from Group VIII in the periodic table, e.g. Ni, Pt, Pd, Rh or Ir, at 0.1-20hr<-1> weight space velocity under ordinary pressure -12kg/cm<2>G and ...
New mesogenic homologous series having an azo central linkage was synthesized by fixing a rigid 4-methyl phenyl azo group to resorcinol moiety. The terminal and lateral phenolic -OH groups were esterified, one by one, with 4- n -alkoxybenzoyl and acetyl group, respectively. All the twelve hom...
Benzene reacts (1) with chlorine, to form (a) substitution products (one-half of the chlorine forms hydrogen chloride) such as chlorobenzene, C6H5Cl; dichlorobenzene, C6H4Cl2(1,4) and (1,2); trichlorobenzene, C6H3Cl3(1,2,4); tetrachlorobenzene (1,2,3,5); and (b) addition produc...
The largest group of aromatic compounds are those in which one or more of thehydrogensof benzene are replaced by some other atom or group, as intoluene(C6H5CH3) andbenzoic acid(C6H5CO2H). Polycyclic aromatic compounds are assemblies of benzene rings that share a common side—for example,na...
There appeared a strong correlation between the size (length) of the n-alkyl and n-alkylaryl moiety of the BCNAs on the one hand, and their optimal antiviral activity on the other (Fig. 1). In fact, if the size of the phenyl group in the alkylaryl-BCNAs is considered as equivalent...
Proton magnetic resonance spectra were systematically analyzed for H27 methylbenzenes and corresponding ring iodinated derivatives based on toluene, o-, m-, and p-xylenes, mesitylene, durene, pentamethylbenzene, and hexamethylbenzene. Typical changes in the chemical shift of methyl group protons attrib...
The methoxy group in 11a can be replaced with a methyl (12a) or a trifluoromethyl group (13a). Given that both electron-donating (OMe) and -withdrawing (CF3) groups afford the same regioselectivity (87:13), the selectivity of the current reaction should be virtually independent of the ...