Laporte rule
E298867
The Laporte rule is a selection rule in spectroscopy that states electronic transitions in centrosymmetric molecules or ions are only allowed between states of opposite parity, helping explain the intensity patterns of absorption and emission spectra.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Laporte rule canonical | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T2789069 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Laporte rule Context triple: [Otto Laporte, knownFor, Laporte rule]
-
A.
Lusser's law
Lusser's law is a reliability engineering principle that states the overall reliability of a system is the product of the reliabilities of its individual components, highlighting how system reliability decreases as more components are added in series.
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B.
Aitken’s Law
Aitken’s Law is a phonological rule in Scots and Scottish English that governs when vowels are pronounced long or short depending on their phonetic and morphological environment.
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C.
Kluge's law
Kluge's law is a proposed sound law in Proto-Germanic historical linguistics that explains the development of certain geminate consonants from earlier consonant clusters.
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D.
Rule 72
Rule 72 is a provision of the U.S. Federal Rules of Civil Procedure that governs how parties may object to and seek review of decisions made by magistrate judges in civil cases.
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E.
Rule 7
Rule 7 is a provision of the Federal Rules of Criminal Procedure that governs the use, form, and content of indictments and informations in federal criminal cases.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Laporte rule Target entity description: The Laporte rule is a selection rule in spectroscopy that states electronic transitions in centrosymmetric molecules or ions are only allowed between states of opposite parity, helping explain the intensity patterns of absorption and emission spectra.
-
A.
Lusser's law
Lusser's law is a reliability engineering principle that states the overall reliability of a system is the product of the reliabilities of its individual components, highlighting how system reliability decreases as more components are added in series.
-
B.
Aitken’s Law
Aitken’s Law is a phonological rule in Scots and Scottish English that governs when vowels are pronounced long or short depending on their phonetic and morphological environment.
-
C.
Kluge's law
Kluge's law is a proposed sound law in Proto-Germanic historical linguistics that explains the development of certain geminate consonants from earlier consonant clusters.
-
D.
Rule 72
Rule 72 is a provision of the U.S. Federal Rules of Civil Procedure that governs how parties may object to and seek review of decisions made by magistrate judges in civil cases.
-
E.
Rule 7
Rule 7 is a provision of the Federal Rules of Criminal Procedure that governs the use, form, and content of indictments and informations in federal criminal cases.
- F. None of above. chosen
Statements (42)
| Predicate | Object |
|---|---|
| instanceOf |
selection rule
ⓘ
spectroscopic rule ⓘ |
| allows |
g to u transitions in centrosymmetric molecules
ⓘ
u to g transitions in centrosymmetric molecules ⓘ |
| appliesTo |
centrosymmetric coordination compounds
ⓘ
centrosymmetric ions ⓘ centrosymmetric molecules ⓘ electronic transitions ⓘ octahedral complexes with a center of symmetry ⓘ |
| assumes | electric dipole approximation ⓘ |
| category |
molecular spectroscopy
ⓘ
quantum chemistry ⓘ |
| concerns |
electric dipole selection rules
ⓘ
symmetry properties of initial and final electronic states ⓘ |
| condition | molecule or ion must possess a center of inversion ⓘ |
| contrastsWith | spin selection rule ⓘ |
| doesNotApplyTo |
electric quadrupole transitions
ⓘ
magnetic dipole transitions ⓘ |
| explains |
forbidden character of certain f–f transitions
ⓘ
intensity patterns in absorption spectra ⓘ intensity patterns in emission spectra ⓘ weakness of d–d transitions in octahedral complexes ⓘ |
| field | spectroscopy ⓘ |
| forbids |
g to g transitions in centrosymmetric molecules
ⓘ
u to u transitions in centrosymmetric molecules ⓘ |
| implies |
change in parity leads to electric dipole allowed transition
ⓘ
no change in parity leads to electric dipole forbidden transition ⓘ |
| isRelaxedBy |
distortion from centrosymmetry
ⓘ
mixing of p and d orbitals ⓘ vibronic coupling ⓘ |
| namedAfter | Otto Laporte ⓘ |
| relatedConcept |
electric dipole transitions
ⓘ
inversion center ⓘ parity ⓘ |
| relevantTo |
lanthanide complexes
ⓘ
molecular orbital symmetry analysis ⓘ transition metal complexes ⓘ |
| statesThat | electronic transitions are allowed only between states of opposite parity in centrosymmetric species ⓘ |
| typeOf | symmetry-based selection rule ⓘ |
| usedIn |
crystal field theory
ⓘ
interpretation of coordination compound spectra ⓘ ligand field theory ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Laporte rule Description of subject: The Laporte rule is a selection rule in spectroscopy that states electronic transitions in centrosymmetric molecules or ions are only allowed between states of opposite parity, helping explain the intensity patterns of absorption and emission spectra.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.