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Slot: empirical formula (empirical_formula)

A chemical formula where numbers denote relative proportion of atoms. E.g. CH2O for glucose

URI: chemrof:empirical_formula Alias: empirical_formula

Inheritance

Applicable Classes

Name Description Modifies Slot
ChemicalEntity A discrete structure that is one or more atoms that can be described by a che... no
ChemicalGroup no
MolecularCation A polyatomic ion that is positive no
Peptide no
SmallMolecule A molecule characterized by availability in small-molecule databases no
Monomer no
PartiallySpecifiedAtom An atom type that only has a subset of properties (has atomic number, charge,... no
Macromolecule A large molecule, such as a polymer, lipid, or macrocycle no
Moiety a named part of a molecule no
Homopolymer a polymer with a single type of repeating unit no
NaturalProduct no
UnchargedAtom An atom type that has no charge no
PolyatomicIon A molecule that has a net charge no
FunctionalGroup no
Enantiomer one of two stereoisomers of a chiral molecule that are mirror images no
ChemicalMixture A polyatomic entity that consists of two or more parts that are weakly bound,... no
MonoatomicIon An atom type that has a charge no
ChemicalSalt a chemical compound consisting of an ionic assembly of cations and anions no
DNASequenceInterval no
MonosaccharideResidue A monosaccharide as it occurs within a glycan, that is, the part of the glyca... no
Copolymer a polymer with a more than one type of repeating unit no
ChemicalElement generic form of an atom, with unspecified neutron or charge no
Protein A macromolecule composed of one or more polypeptide chains of amino acids tha... no
RNASequenceInterval no
PolymerPart no
Isotope A specific subtype of an atom with a specified neutron number no
MonomolecularPolymer A macromolecule composed of repeating subunits no
Atom A chemical entity consisting of exactly one atomic nucleus and the electron(s... no
Nuclide an atomic species characterized by the specific constitution of its nucleus no
MolecularComplex A molecular complex is a chemical complex composed of at least one weakly int... no
MolecularSubsequence no
MolecularAnion A polyatomic ion that is negative no
MoleculeByChargeState A molecule that has a charge state specified no
Glycan A molecule consisting of monosaccharide residues joined to one another by gly... no
PreciseChemicalMixture A polyatomic entity that consists of two or more parts that are weakly bound,... no
ImpreciseChemicalMixture A macroscopic polyatomic entity that consists of multiple chemical entities w... no
RacemicMixture a chemical compound that has equal amounts of left- and right-handed enantiom... no
NetUnchargedMolecule A molecule that has no net charge no
AtomIonicForm an atom type in which only charge state is specified, designated by the eleme... no
AtomAnion A monoatomic ion that is negative no
Allotrope A molecule consisting of atoms of the same element no
Radionuclide an atom that has excess nuclear energy, making it unstable no
Stereoisomer no
FullySpecifiedAtom An atom type that has atomic number, charge, and neutron number stated (equiv... no
NucleotideSequenceInterval no
SequenceInterval a chain of connected monomers in a linear polymer - for example, a sub-region... no
NeutralMolecule A molecule that has no net charge and is not a zwitterion no
AtomCation A monoatomic ion that is positive, e no
Molecule A chemical entity that consists of two or more atoms where all atoms are conn... no
Isobar Isobars are atoms (nuclides) of different chemical elements that have the sam... no
Zwitterion A molecule that has both a positive and negative charges but is net neutral no
SupramolecularPolymer polymeric arrays of monomeric units that are connected by reversible and high... no
MolecularComponent A proper part of a molecule that is larger than an atom no
AminoAcidSequenceInterval no
PolyatomicEntity Any chemical entity consisting of more than one atom no
MolecularSpecies A molecule in which the units are identical no
Ester An ester is a chemical compound derived from an acid (organic or inorganic) i... no
NonSpeciesMolecule A molecule in which the units are not identical no
Monosaccharide A polyhydroxy aldehyde or ketone, or a compound derived from one, that cannot... no

Properties

Examples

Value
CH2O
O

Comments

  • Distinct from molecular_formula, which gives the actual atom counts rather than their smallest whole-number ratio
  • The mapping to CHEMINF:000042 is close rather than exact because that term denotes the molecular formula. CHEMINF has no term for the empirical formula

Identifier and Mapping Information

Annotations

property value
owl AnnotationAssertion

Schema Source

  • from schema: https://w3id.org/chemrof

Mappings

Mapping Type Mapped Value
self chemrof:empirical_formula
native chemrof:empirical_formula
close CHEMINF:000042

LinkML Source

name: empirical_formula
annotations:
  owl:
    tag: owl
    value: AnnotationAssertion
description: A chemical formula where numbers denote relative proportion of atoms.
  E.g. CH2O for glucose
title: empirical formula
comments:
- Distinct from molecular_formula, which gives the actual atom counts rather than
  their smallest whole-number ratio
- The mapping to CHEMINF:000042 is close rather than exact because that term denotes
  the molecular formula. CHEMINF has no term for the empirical formula
examples:
- value: CH2O
  description: glucose, whose atom counts 6:12:6 reduce to 1:2:1
- value: O
  description: dioxygen, whose molecular formula is O2
from_schema: https://w3id.org/chemrof
close_mappings:
- CHEMINF:000042
rank: 1000
is_a: chemical_formula
domain: ChemicalEntity
alias: empirical_formula
domain_of:
- ChemicalEntity
range: ChemicalEncoding