Reactions of CyclopropaneSome small cycloalkanes, including cyclopropane, behave differently than alkanes. A UV-induced substitution reaction occurs with cyclopropane as it does with non-cyclic alkanes. UV light is not necessary for the reaction to occur. It is possible to break the cyclopropane ring without UV light as added reactions take place. When bromine is added to cyclopropane, for instan…
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Coulson and Moffitt’s Modification, Sachse Mohr’s Theory (Theory of Strainless Rings)
Coulson and Moffit’s ModificationKnown as banana bonds or bent bonds, bent bonds are covalent chemical bonds with a shape reminiscent of a banana. The term itself represents an alternative to the sigma and pi bond model, which depicts a density of electrons or configuration similar to a "bent" structure within certain rings, such as in cyclopropane (C3H6).
It is important to note that a …
It is important to note that a …
Stabilities – Baeyer’s Strain Theory, Limitation of Baeyer’s Strain Theory
In 1885, a German chemist, Adolf von Baeyer, a Nobel laureate, formulated a theory that described why the first few cycloalkanes were relatively stable. He derived this theory from the following information. Saturated compounds are cycloalkanes. All carbon atoms should have 109.50 tetrahedral angles. An angle strain would occur if bond angles deviated from the normal tetrahedral angle. Angle stra…
Structure and Medicinal Uses of Diphenylmethane, Triphenylmethane and Their Derivatives
Polynuclear HydrocarbonsMolecularly-fused aromatic rings are the building blocks of polynuclear aromatic hydrocarbons. The rings share electrons and are fusion products. Polynuclear aromatic hydrocarbon molecules consist only of carbon and hydrogen atoms. By fusing two or more benzene rings, PAHs can also be regarded as molecules.
SourcesNatural and environmental pollutant reactions produce PAHs, …
SourcesNatural and environmental pollutant reactions produce PAHs, …
Structure and medicinal uses of Naphthalene, Phenanthrene, Anthracene
NaphthaleneStructureBenzene rings fused in orthoposition are known as polynuclear aromatic hydrocarbons such as naphthalene. Bond lengths at double bond positions are approximately 1.36 angstroms, and those at single bond positions are approximately 1.40 angstroms. In its structure, the naphthalene molecule demonstrates resonance. Resonance hybridization occurs. Molecular orbitals in Naphthalene …
Polynuclear Hydrocarbons: Synthesis and Reactions
Polynuclear Aromatic HydrocarbonThe polynuclear aromatic hydrocarbon has fused aromatic rings and is formed from a hydrocarbon molecule. Each ring shares at least one side and possesses delocalized electrons. Two or more benzene rings are fused together to form polynuclear aromatic hydrocarbon molecules. They only have carbon and hydrogen atoms.
PropertiesLipophilic, nonpolar polynuclear aromatic …
PropertiesLipophilic, nonpolar polynuclear aromatic …
