Polycyclic compound - Wikipedia
In the field of organic chemistry, a polycyclic compound is an organic compound featuring several closed rings of atoms, primarily carbon. [1] These ring substructures include cycloalkanes, aromatics, and other ring types.
Polycyclic aromatic hydrocarbon - Wikipedia
A polycyclic aromatic hydrocarbon (PAH) is a class of organic compounds that is composed of multiple aromatic rings. The simplest representative is naphthalene , having two aromatic rings, and the three-ring compounds anthracene and phenanthrene .
15.6: Polycyclic Aromatic Compounds - Chemistry LibreTexts
As their name indicates, polycyclic aromatic hydrocarbons are aromatic hydrocarbons which contain more than one benzenoid (i.e., benzene-like) ring. This section deals only with those compounds in which the benzenoid rings are fused together; in other words, compounds in which at least one carbon-carbon bond is common to two aromatic rings.
Polycyclic Definition & Meaning - Merriam-Webster
The meaning of POLYCYCLIC is having more than one cyclic component; especially : having two or more rings in the molecule.
15.6 Polycyclic Aromatic Compounds - Organic Chemistry
Naphthalene and other polycyclic aromatic hydrocarbons show many of the chemical properties associated with aromaticity. Thus, measurement of its heat of hydrogenation shows an aromatic stabilization energy of approximately 250 kJ/mol (60 kcal/mol).
15.5: Polycyclic Aromatic Hydrocarbons - Chemistry LibreTexts
As their name indicates, polycyclic aromatic hydrocarbons are aromatic hydrocarbons which contain more than one benzenoid (i.e., benzene-like) ring. This section deals only with those compounds in which the benzenoid rings are fused together; in other words, compounds in which at least one carbon-carbon bond is common to two aromatic rings.
4.9: Conformations of Polycyclic Molecules - Chemistry LibreTexts
2024年9月30日 · Polycyclic molecules are common and important in nature. Biologically important polycyclic molecules are found in cholesterol, sex hormones, birth control pills, cortisone, and anabolic steroids.
Overview of Polycyclic Aromatic Compounds (PAC) - ScienceDirect
The chemical group of polycyclic aromatic compounds (PAC), including the better-known subgroup of polycyclic aromatic hydrocarbons (PAH) and the heterocyclic aromatic compounds (NSO-PAC, heterocycles), comprise several thousand individual compounds.
Polycyclic Aromatic Compounds | Taylor & Francis Online
2024年11月23日 · Interdisciplinary forum for research on polycyclic aromatic compounds ranging from fundamental (chemistry and physics) to applied (toxicology and biochemistry).
2013年7月23日 · Polycyclic aromatic hydrocarbons (PAHs) are a class of chemicals that occur naturally in coal, crude oil, and gasoline. They also are produced when coal, oil, gas, wood, garbage, and tobacco are burned. PAHs generated from these sources can bind to or form small particles in the air.