69 relations: Adolf von Baeyer, Alkane, Allyl group, Aluminium chloride, Ammonium, Arenium ion, Aromaticity, Atom, Bent bond, Bent's rule, Benzyl group, Butyl group, Carbanion, Carbene, Carbenium ion, Carbo-mer, Carbon, Carbonium ion, Chemical structure, Chloromethane, Cycloheptatriene, Electric charge, Electron, Elimination reaction, Ethanium, Fluxional molecule, George Andrew Olah, Halogen, Hans Meerwein, Hückel's rule, Hexamethylbenzene, Hydroxide, Hyperconjugation, Hypervalent molecule, Ion, Journal of the American Chemical Society, Julius Stieglitz, Magic acid, Malachite green, Methanium, Methenium, Nonclassical ion, Norbornadiene, Nuclear magnetic resonance, Nuclear magnetic resonance spectroscopy, Nucleophile, Octet rule, Orbital overlap, Oxocarbenium, Polygon, ..., Pyramidal carbocation, Reaction rate constant, Reactive intermediate, Rearrangement reaction, Resonance (chemistry), Silver tetrafluoroborate, SN1 reaction, Sulfur dioxide, Sulfuric acid, Superacid, Triphenylmethanol, Triphenylmethyl chloride, Tropylium cation, Valence (chemistry), Wagner–Meerwein rearrangement, William von Eggers Doering, 1,2-rearrangement, 2-Butene, 2-Norbornyl cation. Expand index (19 more) » « Shrink index
Johann Friedrich Wilhelm Adolf von Baeyer (31 October 1835 – 20 August 1917) was a German chemist who synthesised indigo, developed a nomenclature for cyclic compounds (that was subsequently extended and adopted as part of the IUPAC organic nomenclature).
In organic chemistry, an alkane, or paraffin (a historical name that also has other meanings), is an acyclic saturated hydrocarbon.
An allyl group is a substituent with the structural formula H2C.
Aluminium chloride (AlCl3) is the main compound of aluminium and chlorine.
The ammonium cation is a positively charged polyatomic ion with the chemical formula.
An arenium ion in organic chemistry is a cyclohexadienyl cation that appears as a reactive intermediate in electrophilic aromatic substitution.
In organic chemistry, the term aromaticity is used to describe a cyclic (ring-shaped), planar (flat) molecule with a ring of resonance bonds that exhibits more stability than other geometric or connective arrangements with the same set of atoms.
An atom is the smallest constituent unit of ordinary matter that has the properties of a chemical element.
In organic chemistry, a bent bond, also known as a banana bond, is a type of covalent chemical bond with a geometry somewhat reminiscent of a banana.
In chemistry, Bent's rule describes and explains the relationship between the orbital hybridization of central atoms in molecules and the electronegativities of substituents.
In organic chemistry, benzyl is the substituent or molecular fragment possessing the structure C6H5CH2–.
In organic chemistry, butyl is a four-carbon alkyl radical or substituent group with general chemical formula −C4H9, derived from either of the two isomers of butane.
A carbanion is an anion in which carbon is threevalent (forms three bonds) and bears a formal negative charge in at least one significant mesomeric contributor (resonance form).
In chemistry, a carbene is a molecule containing a neutral carbon atom with a valence of two and two unshared valence electrons.
A carbenium ion is a positive ion with the structure RR′R″C+, that is, a chemical species with a trivalent carbon that bears a +1 formal charge.
In organic chemistry, a carbo-mer (often carbo-mer or carbomer) is an expanded molecule obtained by insertion of C2 units into a given molecule.
Carbon (from carbo "coal") is a chemical element with symbol C and atomic number 6.
In chemistry, carbonium ion is any cation that has a pentavalent carbon atom, The name carbonium may also be used for the simplest member of the class, properly called methanium, where the five valences are filled with hydrogen atoms.
A chemical structure determination includes a chemist's specifying the molecular geometry and, when feasible and necessary, the electronic structure of the target molecule or other solid.
Chloromethane, also called methyl chloride, Refrigerant-40, R-40 or HCC 40, is a chemical compound of the group of organic compounds called haloalkanes.
Cycloheptatriene (CHT) is an organic compound with the formula C7H8.
Electric charge is the physical property of matter that causes it to experience a force when placed in an electromagnetic field.
The electron is a subatomic particle, symbol or, whose electric charge is negative one elementary charge.
An elimination reaction is a type of organic reaction in which two substituents are removed from a molecule in either a one or two-step mechanism.
In chemistry, ethanium or protonated ethane is a highly reactive positive ion with formula.
Fluxional molecules are molecules that undergo dynamics such that some or all of their atoms interchange between symmetry-equivalent positions.
George Andrew Olah (born Oláh György; May 22, 1927 – March 8, 2017) was a Hungarian and American chemist.
The halogens are a group in the periodic table consisting of five chemically related elements: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At).
Hans Meerwein (May 20, 1879 in Hamburg, Germany – October 24, 1965 in Marburg, Germany) was a German chemist.
In organic chemistry, Hückel's rule estimates whether a planar ring molecule will have aromatic properties.
Hexamethylbenzene, also known as mellitene, is a hydrocarbon with the molecular formula C12H18 and the condensed structural formula C6(CH3)6.
Hydroxide is a diatomic anion with chemical formula OH−.
In organic chemistry, hyperconjugation is the interaction of the electrons in a sigma orbital (e.g. C–H or C–C) with an adjacent empty (or partially filled) non-bonding orbital, antibonding σ or π orbital, to give an extended molecular orbital.
A hypervalent molecule (the phenomenon is sometimes colloquially known as expanded octet) is a molecule that contains one or more main group elements apparently bearing more than eight electrons in their valence shells.
An ion is an atom or molecule that has a non-zero net electrical charge (its total number of electrons is not equal to its total number of protons).
The Journal of the American Chemical Society (also known as JACS) is a weekly peer-reviewed scientific journal that was established in 1879 by the American Chemical Society.
Julius Stieglitz (May 26, 1867 – January 10, 1937) was an American chemist of German Jewish origin.
Magic acid (FSO3H·SbF5) is a superacid consisting of a mixture, most commonly in a 1:1 molar ratio, of fluorosulfuric acid (HSO3F) and antimony pentafluoride (SbF5).
Malachite green is an organic compound that is used as a dyestuff and controversially as an antimicrobial in aquaculture.
In chemistry, methanium is a complex positive ion with formula +, namely a molecule with one carbon atom bonded to three hydrogen atoms and one hydrogen molecule, bearing a +1 electric charge.
In organic chemistry, methenium (also called methylium, the methyl cation, or protonated methylene) is a positive ion with the formula.
Nonclassical carbocations are stabilized by charge delocalization from contributions of neighbouring C-C or C-H bonds, which can form bridged intermediates or transition states.
Norbornadiene is a bicyclic hydrocarbon and an organic compound.
Nuclear magnetic resonance (NMR) is a physical phenomenon in which nuclei in a magnetic field absorb and re-emit electromagnetic radiation.
Nuclear magnetic resonance spectroscopy, most commonly known as NMR spectroscopy or magnetic resonance spectroscopy (MRS), is a spectroscopic technique to observe local magnetic fields around atomic nuclei.
Nucleophile is a chemical species that donates an electron pair to an electrophile to form a chemical bond in relation to a reaction.
The octet rule is a chemical rule of thumb that reflects observation that atoms of main-group elements tend to combine in such a way that each atom has eight electrons in its valence shell, giving it the same electron configuration as a noble gas.
In chemical bonds, an orbital overlap is the concentration of orbitals on adjacent atoms in the same regions of space.
An oxocarbenium ion (or oxacarbenium ion) is a chemical species characterized by a central sp2-hybridized carbon, an oxygen substituent, and an overall positive charge that is delocalized between the central carbon and oxygen atoms.
In elementary geometry, a polygon is a plane figure that is bounded by a finite chain of straight line segments closing in a loop to form a closed polygonal chain or circuit.
A pyramidal carbocation is a type of carbocation with a specific configuration.
In chemical kinetics a reaction rate constant or reaction rate coefficient, k, quantifies the rate of a chemical reaction.
In chemistry, a reactive intermediate or an intermediate is a short-lived, high-energy, highly reactive molecule.
A rearrangement reaction is a broad class of organic reactions where the carbon skeleton of a molecule is rearranged to give a structural isomer of the original molecule.
In chemistry, resonance or mesomerism is a way of describing delocalized electrons within certain molecules or polyatomic ions where the bonding cannot be expressed by one single Lewis structure.
Silver tetrafluoroborate is an inorganic compound with the chemical formula AgBF4.
The SN1 reaction is a substitution reaction in organic chemistry.
Sulfur dioxide (also sulphur dioxide in British English) is the chemical compound with the formula.
Sulfuric acid (alternative spelling sulphuric acid) is a mineral acid with molecular formula H2SO4.
According to the classical definition, a superacid is an acid with an acidity greater than that of 100% pure sulfuric acid, which has a Hammett acidity function (H0) of −12.
Triphenylmethanol (also known as triphenylcarbinol, TrOH) is an organic compound.
Triphenylmethyl chloride or trityl chloride (TrCl) is a white solid with the chemical formula C19H15Cl.
In organic chemistry, the tropylium ion is an aromatic species with a formula of +. Its name derives from the molecule tropine (itself named for the molecule atropine).
In chemistry, the valence or valency of an element is a measure of its combining power with other atoms when it forms chemical compounds or molecules.
A Wagner–Meerwein rearrangement is a class of carbocation 1,2-rearrangement reactions in which a hydrogen, alkyl or aryl group migrates from one carbon to a neighboring carbon.
William von Eggers Doering (June 22, 1917 – January 3, 2011) was a Professor Emeritus at Harvard University and the former Chair of its Chemistry Department.
A 1,2-rearrangement or 1,2-migration or 1,2-shift or Whitmore 1,2-shift is an organic reaction where a substituent moves from one atom to another atom in a chemical compound.
2-Butene is an acyclic alkene with four carbon atoms.
In organic chemistry, the term 2-norbornyl cation (equivalent with 2-bicyclo-heptyl cation) describes one of the three carbocations formed from derivatives of norbornane.