molecular entity

Preferred Label : molecular entity;

IUPAC definition : Any constitutionally or isotopically distinct atom, molecule, ion, ion pair, radical, radical ion, complex, conformer etc., identifiable as a separately distinguishable entity. Molecular entity is used in this Compendium as a general term for singular entities, irrespective of their nature, while chemical species stands for sets or ensembles of molecular entities. Note that the name of a compound may refer to the respective molecular entity or to the chemical species, e.g. methane, may mean a single molecule of CH sub 4 /sub (molecular entity) or a molar amount, specified or not (chemical species), participating in a reaction. The degree of precision necessary to describe a molecular entity depends on the context. For example 'hydrogen molecule' is an adequate definition of a certain molecular entity for some purposes, whereas for others it is necessary to distinguish the electronic state and/or vibrational state and/or nuclear spin, etc. of the hydrogen molecule.;

Details

Origin ID

M03986;

See also
- Brønsted acid [IUPAC Term]
- Brønsted base [IUPAC Term]
- Jablonski diagram [IUPAC Term]
- Kasha rule [IUPAC Term]
- Lewis acid [IUPAC Term]
- Lewis base [IUPAC Term]
- acid [IUPAC Term]
- addition reaction [IUPAC Term]
- additivity principle [IUPAC Term]
- adduct [IUPAC Term]
- ambident [IUPAC Term]
- amount fraction x (y for gaseous mixtures) [IUPAC Quantity]
- association [IUPAC Term]
- attachment [IUPAC Term]
- base [IUPAC Term]
- binding site [IUPAC Term]
- biradical [IUPAC Term]
- charge population [IUPAC Term]
- chelation [IUPAC Term]
- chemical reaction [IUPAC Term]
- chemical species [IUPAC Term]
- chromophore [IUPAC Term]
- complex [IUPAC Term]
- condensation reaction [IUPAC Term]
- configuration (electronic) [IUPAC Term]
- conformer [IUPAC Term]
- coordination [IUPAC Term]
- cryptand [IUPAC Term]
- delocalization [IUPAC Term]
- detailed balancing (principle of) [IUPAC Term]
- di-π-methane rearrangement [IUPAC Term]
- dimerization [IUPAC Term]
- dissociation [IUPAC Term]
- effective molarity [IUPAC Term]
- electron attachment [IUPAC Term]
- electron donor [IUPAC Term]
- electron transfer [IUPAC Term]
- electronic state [IUPAC Term]
- encounter complex [IUPAC Term]
- encounter-controlled rate [IUPAC Term]
- excimer [IUPAC Term]
- exciplex [IUPAC Term]
- frontier orbitals [IUPAC Term]
- geminate pair [IUPAC Term]
- group [IUPAC Term]
- host [IUPAC Term]
- hydration [IUPAC Term]
- hydrophilic [IUPAC Term]
- inductive effect [IUPAC Term]
- intermediate [IUPAC Term]
- intermolecular [IUPAC Term]
- intramolecular [IUPAC Term]
- intramolecular catalysis [IUPAC Term]
- ion pair [IUPAC Term]
- ionization [IUPAC Term]
- isoelectronic [IUPAC Term]
- isomer [IUPAC Term]
- isometric [IUPAC Term]
- l, u [IUPAC Term]
- line formula [IUPAC Term]
- mesomeric effect [IUPAC Term]
- microscopic diffusion control [IUPAC Term]
- migration [IUPAC Term]
- molecular orbital [IUPAC Term]
- molecularity [IUPAC Term]
- molecule [IUPAC Term]
- multi-centre bond [IUPAC Term]
- oxidation [IUPAC Term]
- oxidative coupling [IUPAC Term]
- photolysis [IUPAC Term]
- polarizability [IUPAC Quantity]
- pre-association [IUPAC Term]
- precision [IUPAC Term]
- primary photochemical process [IUPAC Term]
- radiative transition [IUPAC Term]
- radical (free radical) [IUPAC Term]
- radical ion [IUPAC Term]
- reacting bond rules [IUPAC Term]
- reaction coordinate [IUPAC Term]
- reduction [IUPAC Term]
- resonance [IUPAC Term]
- resonance energy [IUPAC Term]
- spectator mechanism [IUPAC Term]
- spin label [IUPAC Term]
- stereoelectronic [IUPAC Term]
- strain [IUPAC Term]
- substitution reaction [IUPAC Term]
- supramolecule [IUPAC Term]
- transition state [IUPAC Term]
- van der Waals forces [IUPAC Term]
- α-addition [IUPAC Term]

Keyword's position in hierarchy(ies) :

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