polycyclic ring

См. также в других словарях:

• Polycyclic — may refer to: * Polycyclic compound, in organic chemistry, a cyclic compound with more than one hydrocarbon loop or ring structures * Polycyclic group, in mathematics, a solvable group that satisfies the maximal condition on subgroups …   Wikipedia

• Polycyclic aromatic hydrocarbon — An illustration of typical polycyclic aromatic hydrocarbons. Clockwise from top left: benz(e)acephenanthrylene, pyrene and dibenz(ah)anthracene …   Wikipedia

• Polycyclic compound — In organic chemistry, a polycyclic compound is a cyclic compound with more than one hydrocarbon loop or ring structures (benzene rings) [JerryMarch] . The term generally includes all polycyclic aromatic compounds, including the polycyclic… …   Wikipedia

• polycyclic — poly·cy·clic .päl i sī klik, sik lik adj having more than one cyclic component esp having two or more usu. fused rings in a molecule * * * poly·cy·clic (pol″e sikґlik) ( siґklik) [poly + cyclic] containing more than one ring or cycle… …   Medical dictionary

• polycyclic aromatic compound — abbr. PAC PAC includes multi ringed aromatic hydrocarbons in which one or more atoms of nitrogen, oxygen or sulfur (a heteroatom) replace one of the carbon atoms in a ring system. The PACs can be grouped according to the heteroatom they contain.… …   Petroleum refining glossary

• polycyclic aromatic hydrocarbon — abbr. PAH A fused aromatic ring compound consisting only of carbon and hydrogen. Similar compounds include chrysene, pyrene, benzo[a]pyrene, perylene, etc. Naphthalene, the simplest PAH consists of two fused benzene rings. (API 2007) …   Petroleum refining glossary

• polycyclic — /pɒliˈsaɪklɪk/ (say polee suyklik) adjective of or relating to a molecule which contains more than one ring …  

• polycyclic — adj. Chem. having more than one ring of atoms in the molecule …   Useful english dictionary

• Chlorinated polycyclic aromatic hydrocarbon — Chlorinated polycyclic aromatic hydrocarbons (ClPAHs) are a group of compounds comprising polycyclic aromatic hydrocarbons with two or more aromatic rings and one or more chlorine atoms attached to the ring system. ClPAHs can be divided into two… …   Wikipedia

• Simple aromatic ring — Simple aromatic rings, also known as simple arenes or simple aromatics, are aromatic organic compounds that consist only of a conjugated planar ring system with delocalized pi electron clouds. Many simple aromatic rings have trivial names. They… …   Wikipedia

• Domain (ring theory) — In mathematics, especially in the area of abstract algebra known as ring theory, a domain is a ring such that ab = 0 implies that either a = 0 or b = 0.[1] That is, it is a ring which has no left or right zero divisors. (Sometimes such a ring is… …   Wikipedia