TERMIUM Plus®
The Government of Canada’s terminology and linguistic data bank.
CHAIR FORM [2 records]
Record 1 - internal organization data 2011-11-09
Record 1, English
Record 1, Subject field(s)
- Chemistry
- Biotechnology
Record 1, Main entry term, English
- chair conformation
1, record 1, English, chair%20conformation
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
- chair 2, record 1, English, chair
correct
- chair form 2, record 1, English, chair%20form
correct
Record 1, Textual support, English
Record number: 1, Textual support number: 1 CONT
The chair conformation is the most stable conformation of cyclohexane. 2, record 1, English, - chair%20conformation
Record 1, French
Record 1, Domaine(s)
- Chimie
- Biotechnologie
Record 1, Main entry term, French
- conformation en chaise
1, record 1, French, conformation%20en%20chaise
correct, feminine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
- conformation chaise 2, record 1, French, conformation%20chaise
correct, feminine noun
Record 1, Textual support, French
Record number: 1, Textual support number: 1 DEF
Conformation du cyclohexane de symétrie D3d dans laquelle les atomes de carbone 1, 2, 4 et 5 occupent des positions coplanaires tandis que les atomes de carbone 3 et 6 se situent de part et d'autre du plan ainsi défini. 2, record 1, French, - conformation%20en%20chaise
Record number: 1, Textual support number: 1 OBS
Une conformation similaire peut se rencontrer également chez certains composés à grands cycles. 2, record 1, French, - conformation%20en%20chaise
Record number: 1, Textual support number: 2 OBS
conformation chaise; conformation en chaise : termes et définition publiés au Journal officiel de la République française le 18 avril 2001. 3, record 1, French, - conformation%20en%20chaise
Record 1, Spanish
Record 1, Campo(s) temático(s)
- Química
- Biotecnología
Record 1, Main entry term, Spanish
- conformación en silla
1, record 1, Spanish, conformaci%C3%B3n%20en%20silla
feminine noun
Record 1, Abbreviations, Spanish
Record 1, Synonyms, Spanish
Record 1, Textual support, Spanish
Record 2 - internal organization data 2010-08-11
Record 2, English
Record 2, Subject field(s)
- Chemistry
Record 2, Main entry term, English
- chair form
1, record 2, English, chair%20form
correct
Record 2, Abbreviations, English
Record 2, Synonyms, English
- chair 2, record 2, English, chair
correct
Record 2, Textual support, English
Record number: 2, Textual support number: 1 OBS
Whereas many fully unsaturated rings are very nearly planar, their saturated or partially saturated analogs, containing tetrahedrally coordinated atoms, are necessarily three-dimensional. This frequently gives rise to a preferred orientation of the atoms in a molecule, differing from other possible orientations (conformers) by rotation about single bonds. Thus, cyclohexane exists predominantly in the chair form, although boat and twist forms of cyclohexanes are also known. 1, record 2, English, - chair%20form
Record 2, French
Record 2, Domaine(s)
- Chimie
Record 2, Main entry term, French
- forme chaise
1, record 2, French, forme%20chaise
correct, feminine noun
Record 2, Abbreviations, French
Record 2, Synonyms, French
- chaise 2, record 2, French, chaise
correct, feminine noun
Record 2, Textual support, French
Record number: 2, Textual support number: 1 CONT
La conformation (du groupe de symétrie D3d est appelée forme chaise [...] lorsque les atomes 1,2,4 et 5 du cyclohexane occupent des positions coplanaires et lorsque les atomes de carbone 3 et 6 sont situés sur des côtés opposés du plan. 2, record 2, French, - forme%20chaise
Record number: 2, Textual support number: 1 OBS
La forme chaise est la plus stable car elle est dans une conformation telle que tous les angles dièdres autour de chaque liaison sont voisins de 60°, situation analogue à la forme gauche du butane. Il existe donc un minimum de contraintes stériques. 3, record 2, French, - forme%20chaise
Record number: 2, Textual support number: 2 OBS
Dès 1890, H. Sachse avait remarqué qu'un cycle carboné de six éléments pouvait être construit en dehors de toute tension angulaire soit sous une forme flexible, soit sous une forme rigide ou forme chaise. Parmi l'infinité de conformations flexibles existent deux formes caractéristiques; une forme dite bateau et une forme dite croisée. 3, record 2, French, - forme%20chaise
Record 2, Spanish
Record 2, Campo(s) temático(s)
- Química
Record 2, Main entry term, Spanish
- conformación de silla
1, record 2, Spanish, conformaci%C3%B3n%20de%20silla
correct, feminine noun
Record 2, Abbreviations, Spanish
Record 2, Synonyms, Spanish
- forma de silla 1, record 2, Spanish, forma%20de%20silla
correct, feminine noun
- silla 2, record 2, Spanish, silla
correct, feminine noun
Record 2, Textual support, Spanish
Record number: 2, Textual support number: 1 CONT
Los ángulos C-C-C [carbono-carbono-carbono] del ciclohexano pueden alcanzar el valor tetraédrico libre de tensión si el anillo adopta la conformación de silla [...]. Más aún, se observa a lo largo de cualquiera de los enlaces carbono-carbono [...] que en la conformación de silla el ciclohexano no presenta esfuerzo torsional; todos los enlaces C-H [carbono-hidrógeno] vecinos están perfectamente alternados. La conformación de silla del ciclohexano es de tanta importancia que todos los químicos orgánicos deben aprender a dibujarla correctamente. 3, record 2, Spanish, - conformaci%C3%B3n%20de%20silla
Record number: 2, Textual support number: 2 CONT
Las conformaciones más importantes que puede presentar el ciclohexano son la silla y el bote. [...] La forma de silla es más estable que la de bote, por lo que la forma de silla es mayoritaria. Se estima que, en un momento dado, más del 99% de las moléculas se encuentran en forma de silla. [...] En la conformación silla existen dos tipos de enlaces: axiales y ecuatoriales. Los enlaces axiales en la silla 1 pasan a ser ecuatoriales en la silla 2. Los enlaces ecuatoriales en la silla 1 pasan a ser axiales en la silla 2. Las dos sillas son indistinguibles si no poseen algún sustituyente. 4, record 2, Spanish, - conformaci%C3%B3n%20de%20silla
Copyright notice for the TERMIUM Plus® data bank
© Public Services and Procurement Canada, 2024
TERMIUM Plus®, the Government of Canada's terminology and linguistic data bank
A product of the Translation Bureau
Features
Language Portal of Canada
Access a collection of Canadian resources on all aspects of English and French, including quizzes.
Writing tools
The Language Portal’s writing tools have a new look! Easy to consult, they give you access to a wealth of information that will help you write better in English and French.
Glossaries and vocabularies
Access Translation Bureau glossaries and vocabularies.
- Date Modified: