In chemistry, a heteroatom (from Ancient Greek heteros 'different' and atomos 'uncut') is, strictly, any atom that is not carbon or hydrogen. In practice...
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six nitrogen heteroatoms would be hexazine. Borazine is a six-membered ring with three nitrogen heteroatoms and three boron heteroatoms. In a 7-membered...
18 KB (946 words) - 15:52, 25 June 2024
These reactions are used to form carbon–carbon bonds but also carbon-heteroatom bonds. Cross-coupling reaction are a subset of coupling reactions. Richard...
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atoms in azoles starts with the heteroatom that is not part of a double bond, and then proceeds towards the other heteroatom. Imidazole and other five-membered...
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In biochemistry, flavin adenine dinucleotide (FAD) is a redox-active coenzyme associated with various proteins, which is involved with several enzymatic...
39 KB (4,310 words) - 21:09, 25 November 2023
Double bond (redirect from Carbon-heteroatom double bond)
In chemistry, a double bond is a covalent bond between two atoms involving four bonding electrons as opposed to two in a single bond. Double bonds occur...
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Bonding between carbon–carbon Bonding between carbon–heteroatom Bonding between heteroatom–heteroatom Bond formation between carbon atoms forms very thermodynamically...
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whereby a carbon–carbon or carbon–heteroatom single bond is cleaved or undergoes lysis (breakdown) by hydrogen. The heteroatom may vary, but it usually is oxygen...
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Heteroatom-promoted lateral lithiation is the site-selective replacement of a benzylic hydrogen atom for lithium for the purpose of further functionalization...
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two additional single, or σ, bonds. Addition of a nucleophile to carbon–heteroatom double or triple bonds such as >C=O or -C≡N show great variety. These...
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The main chain contains No heteroatom Heteroatoms present Nitrogen-containing Sulfur-containing Aromatic cycles Poly(fluorene)s polyphenylenes polypyrenes...
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further broken down by what type of atom they incorporate (a carbon or a heteroatom) into the expanded ring. These reactions have the general features of...
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(i.e. with "C"), whereas heteroatoms are always explicitly noted as such ("N" for nitrogen, "O" for oxygen, etc.) Heteroatoms and other groups of atoms...
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than it would be for a primary or secondary alkyl chloride without a heteroatom.[citation needed] Ph−S−CH2−CH2−Cl reacts with water 650 times faster than...
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one prefix, if more than one type of heteroatom is present; a multiplicative prefix if there are several heteroatoms of the same type; and locants to indicate...
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Trifluoroperacetic acid (section Heteroatom oxidation)
structural details. Aromatic systems containing heteroatoms are resistant to this ring-opening as heteroatom oxidation occurs preferentially and deactivates...
34 KB (3,306 words) - 22:20, 4 June 2024
relationship between compounds with the same polyvalent functional group with heteroatom but differ in the main carbon chain or any of the side chains. It has...
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Research International Geofluids Global Health, Epidemiology, and Genomics Heteroatom Chemistry HPB Surgery Human Behavior and Emerging Technologies Infectious...
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of heteroatoms in the molecule and a half-integer value of u indicates the presence of an odd number of nitrogen atoms. On addition of heteroatoms, the...
24 KB (2,827 words) - 18:35, 11 December 2023
double bonds (alkenes) or triple bonds (alkynes). If other elements (heteroatoms) are bound to the carbon chain, the most common being oxygen, nitrogen...
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Hückel's rule (section Heteroatoms)
In organic chemistry, Hückel's rule predicts that a planar ring molecule will have aromatic properties if it has 4n + 2 π-electrons, where n is a non-negative...
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converted to the corresponding halides. Most functional groups feature heteroatoms (atoms other than C and H). Organic compounds are classified according...
38 KB (4,347 words) - 10:52, 7 August 2024
contribution of dispersive attraction, particularly in the presence of heteroatoms. London dispersion forces are also known as 'dispersion forces', 'London...
35 KB (3,935 words) - 03:04, 24 July 2024
that describes the tendency of heteroatomic substituents adjacent to a heteroatom within a cyclohexane ring to prefer the axial orientation instead of the...
19 KB (2,539 words) - 18:53, 1 August 2024
Unactivated C−H bonds are found in alkanes and are not adjacent to a heteroatom (O, N, Si, etc.). Such bonds usually only participate in radical substitution...
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least one methine or vinylene (-C= or -CH=CH-) group is replaced by a heteroatom: oxygen, nitrogen, or sulfur. Examples of non-benzene compounds with aromatic...
21 KB (2,098 words) - 10:35, 24 July 2024
atoms. It should have the maximum number of heteroatoms. It should have the maximum number of senior heteroatoms (in order: O, S, N, P, Si, B). For chains:...
40 KB (4,496 words) - 10:59, 10 July 2024
place which involves covalent bonds between carbon atoms or carbon and heteroatoms (such as oxygen, nitrogen, halogens, etc.). Many specific reactions in...
66 KB (8,031 words) - 09:58, 12 July 2024
consecutive atoms, in which one or more atoms in the doubly bonded chain is a heteroatom. Such species are analogous to a cumulene in which the chain of doubly...
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Camasso, N. M.; Sanford, M. S. (2015). "Design, synthesis, and carbon-heteroatom coupling reactions of organometallic nickel(IV) complexes". Science. 347...
89 KB (9,740 words) - 09:36, 21 June 2024