نتایج جستجو برای: dibenzo a
تعداد نتایج: 13432434 فیلتر نتایج به سال:
Rotaxanes can have topological isomers because of their mechanically interlocked axle and wheel components. Directional are formed when the rotaxanes constructed using an asymmetric a three-dimensional non-symmetrical wheel. In this work, directional [2]rotaxanes were synthesised lariat dibenzo-24-crown-8 ether as component sec-ammonium salt axle. Control over isomer ratio was achieved, demonst...
For the first time, electron-rich thiophene units were fused into the skeleton of corannulene to extend π-surfaces and tune arrangement in single crystals. Two isomeric butterfly-like thiophene-fused dibenzo[a,g]corannulenes (3 and 5) were synthesized. Isomer 3 showed p-type transport properties, with a hole mobility of 0.06 cm(2) V(-1) s(-1).
The tricyclic system of the title compound, C(22)H(15)Br, has a concave shape, with a dihedral angle between the benzene ring planes of 48.68 (1)°.
Levels of polybrominated dibenzo-p-dioxins (PBDDs) were measured in marine fish, mussels, and shellfish. PBDDs were nondetectable in samples from freshwater environments, and their levels were successively higher in samples from the marine environments of the Bothnian Bay and Bothnian Sea, the West Coast of Sweden, and the Baltic Proper. In Baltic Proper littoral fish the levels of PBDDs genera...
The title compound, C(15)H(10)Br(2)Cl(2)N(2), a 2,8-dibromo-4,10-dichloro Tröger's base analogue derived from 4-bromo-2-chloro-aniline, has a dihedral angle of 110.9 (10)° between the two aryl rings, the largest yet measured for a simple dibenzo analogue.
Nucleotide sequence analysis of the flanking regions of the carBC genes of Pseudomonas sp. strain CA10 revealed that there were two open reading frames (ORFs) ORF4 and ORF5, in the upstream region of carBC. Similarly, three ORFs, ORF6 to ORF8, were found in the downstream region of carBC. The deduced amino acid sequences of ORF6 and ORF8 showed homologies with ferredoxin and ferredoxin reductas...
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