benzene ring n. A hexagonal ring arrangement found in benzene and other aromatic compounds, consisting of six carbon atoms with alternating single and double bonds between them, and with each carbon atom bonded to a hydrogen atom, or to other atoms or groups of atoms in derivatives of benzene...
p-Methyl- and p-halo-substituted N-phenylethyleneimines were synthesized, and their structures were confirmed by their IR, UV, and PMR spectra. It was concluded that the introduction of the indicated substituents into the para position relative to the aziridine ring increases conjugation of the ...
A Benzene Ring is defined as a large molecular structure that exhibits various group frequencies in the infrared and Raman spectra, characterized by C–H stretching absorptions, conjugated C=C bonds stretching modes, and substitution-sensitive bands below 1000 cm −1. ...
According to a careful analysis of kinetic isotope effects associated with aromatic oxidation, kH/kD ~ 1.2 is compatible with reversible opening of the epoxide ring (73). When labeled H218O2 (> 90% isotopic enrichment) was used as the oxidant in the presence of 16O2 and H216O, the Ph18...
The cyclization of cycloheptatriene to norcaradiene proceeds via a highly aromatic transition structure, but norcaradiene itself is less aromatic than cycloheptatriene. An annelated cyclopropane ring does not function as effectively as a double bond in promoting cyclic electron delocalization. 展开 ...
摘要: New planar binuclear phthalocyanines sharing the benzene ring were synthesized and their spectral properties were studied. Intense absorption in the near-IR region (850 nm) was observed for the first time.关键词: phthalocyanines zinc complexes magnesium complexes electronic absorption spectra ...
The IR spectrum obtained experimentally could be reproduced accurately by detailed calculations at the CCSD(T) level. The most intense band in the spectrum at 547 cm1 was assigned to a ring deformation band characteristic for 2.doi:10.1002/anie.199607461...
New species, such as alkylbenzene with short chains, naphthalene, indane, biphenyl, condensed ring compounds and unsaturated compounds, are formed by cracking and cyclization in the regeneration process. 展开 年份: 2003 收藏 引用 批量引用 报错 分享 ...
GC/FT-IR spectroscopy has been used to identify the components in a sample of commercial divinyl benzene. The sample is found to be a complex mixture of aromatic compounds differing in the type and position of ring substitution. Positive... Witt J.D.,Gabriel M.K.,Julian R.L. - 《Journa...
The structures, electronic properties, stabilities, mechanisms, and activation barriers of the intramolecular inter-ring haptotropic rearrangements (η6,η6-IRHRs) of chromium tricarbonyl and chromium benzene complexes of graphene were modeled by DFT calculations. All of the above calculated characteristics...