Heteroatom
Heteroatom In the nomenclature of organic chemistry, a heteroatom (from Old Greek heteros, different, + atomos) is ... deprecated Protein Data Bank file format, a heteroatom record (HETATM) describes an atom belonging to ...
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Heteroatom   (translated from German)
Heteroatom This article requires a revision. Details are ...
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Nukleophile substitution   (translated from German)
... one Alkyl or Aryl residue, X elektronenziehendes Heteroatom ). The heteroatom is replaced thereby by the Nukleophil (? Substitution ... part-loaded. In the following connections the heteroatom and/or the Heteroatom haltige group can be replaced with a ...
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Hantzsch Widmann Patterson nomenclature   (translated from German)
... to boron, the prefix depends on the heteroatom with the highest priority. I O S ... durchnummeriert in such a way, that the heteroatom with the highest priority gets the number ... the separate systems is mastergiving. h) A heteroatom, to both rings belongs, in the name ...
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Heterocyclus   (translated from German)
Heterocyclus Pyrrol , a Heterocyclus. Heteroatom is the nitrogen atom Heterocyclus a structural ... Cyclus), in its stand at least Member Heteroatom is, thus an atom, that none Carbon ...
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Anomeric effect
... tendency of heteroatomic substituents next to a heteroatom in a cyclohexane ring to prefer the ... the unshared electron pair of the endocyclic heteroatom and the σ* orbital for the exocyclic ...
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Neighbouring group participation
... and S N 2 reactions. NGP by heteroatom lone pairs A classic example of NGP ... for a primary alkyl chloride without a heteroatom. In sugar chemistry anchimeric assistance is an ...
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Raney nickel
... and carbonyls. Additionally, Raney nickel will reduce heteroatom-heteroatom bonds such as nitro groups, and nitrosamines ...
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Hydrogen bond
... must be attached to a strongly electronegative heteroatom, such as oxygen, nitrogen or fluorine, which ... a lone pair of electrons on another heteroatom, which becomes the hydrogen-bond acceptor. The ...
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Organic compounds   (translated from Russian)
... cycle with one (or several) by the heteroatom Pyridine-Pyrrole-Thiophene-Furan-Imidazole Polymers Polymers ... connections Five-member aromatic heterocycles with one heteroatom Pyrrole Furan Thiophene Selenophene Five-member aromatic ...
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