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ORGANIC CHEMISTRY BASICS
ORGANIC CHEMISTRY BASICS

... o ORGANIC CHEMISTRY Used to be considered chemistry of living things (or things that were once living… like petroleum) o Since it has been demonstrated that organic compounds can be synthesized in laboratories we now just say that Organic chemistry is the Chemistry of Carbon compounds o Examples: pe ...
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... Chlorine is NOT stable, it has one valence electron it would like obtain In forming an ionic bond, sodium will transfer its one valence electron to chlorine making both atoms stable. Now Na is positive and Cl is negative forming an attraction or ionic bond. Covalent bonds involve the sharing of ele ...
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... Proton – particle in nucleus with a positive charge Neutron – particle in nucleus that is neutral Quarks – particles that make up protons and neutrons Electron – particle that orbits the nucleus in different energy levels and has a negative charge Valence – electrons on the outermost energy level of ...
Atoms, Elements, and Compounds Study Guide
Atoms, Elements, and Compounds Study Guide

... Proton – particle in nucleus with a positive charge Neutron – particle in nucleus that is neutral Quarks – particles that make up protons and neutrons Electron – particle that orbits the nucleus in different energy levels and has a negative charge Valence – electrons on the outermost energy level of ...
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... phosphorus atom is bonded to four oxygen atoms; one oxygen is bonded to the carbon skeleton; two oxygens carry negative charges. The phosphate group (—OPO32–, abbreviated P ) is an ionized form of a phosphoric acid group (—OPO3H2; note the two ...
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chapter 7 - chemical formulas and chemical compounds

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... - When a π system donates electrons, the π system has a positive mesomeric effect (+M). -When a lone pair of electron is donated, the group donating the electrons has a positive mesomeric effect (+M). -When a π-system accepts electron, the π-system has a negative mesomeric effect (-M). -In neutral c ...
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Homoaromaticity



Homoaromaticity in organic chemistry refers to a special case of aromaticity in which conjugation is interrupted by a single sp3 hybridized carbon atom. Although this sp3 center disrupts the continuous overlap of p-orbitals, traditionally thought to be a requirement for aromaticity, considerable thermodynamic stability and many of the spectroscopic, magnetic, and chemical properties associated with aromatic compounds are still observed for such compounds. This formal discontinuity is apparently bridged by p-orbital overlap, maintaining a contiguous cycle of π electrons that is responsible for this preserved chemical stability.The concept of homoaromaticity was pioneered by Saul Winstein in 1959, prompted by his studies of the “tris-homocyclopropenyl” cation. Since the publication of Winstein's paper, much research has been devoted to understanding and classifying these molecules, which represent an additional “class” of aromatic molecules included under the continuously broadening definition of aromaticity. To date, homoaromatic compounds are known to exist as cationic and anionic species, and some studies support the existence of neutral homoaromatic molecules, though these are less common. The 'homotropylium' cation (C8H9+) is perhaps the best studied example of a homoaromatic compound.
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