Indices de rétention de cycloalcanes, cycloalcènes, bicycloalkyles, cycloalkyl‐cycloalcényles et bicycloalcényles en chromatographie en phase gazeuse

Besson, R; Gäumann, Tino

doi:10.1002/hlca.19730560339

Helvetica Chimica Acta

1973

DOI: 10.1002/hlca.19730560339

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Indices de rétention de cycloalcanes, cycloalcènes, bicycloalkyles, cycloalkyl‐cycloalcényles et bicycloalcényles en chromatographie en phase gazeuse

R Besson

Tino Gäumann

Abstract: The retention indices for cycloalkanes, cycloalkenes and bicyclic compounds have been measured as a function of temperature for different liquids phases. The diastereomeric bicycloalkenyl‐2 were separated. Some rules concerning the indices are given.

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1973

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Cited by 5 publications

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Réactions De Deshydrodimérisation Radicalaire. 4. Action Du Peroxyde De Di‐t.Butyle Sur Les Alkylbenzenes: Diastéréomerie Des Dérivés Bibenzyles (

Gouverneur

Mulangala

1977

Bulletin des Soc Chimique

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Recieved 8/7/77 -Accepted 18/7/77 V e s o and r a c e m i c b i b e n z y l e s a r e f o r m e d by a c t i o n of d i -t . b u t y 1p e r o x i d e on a l k y l h e n z e n e s ( e t h y I -, n . p r o p y l -, n . b u t y 1 -, n. p e n t y I -, n . h e x y I -, isob u t y l -, s e c . b u t y 1 -, i s o p e n t y l b e n z e n e l and o n para-X s u b s t i t u t e d e t h y l b e n z e n e s ( X = F , CI, B r , CH , C H 0 ) . T h e n a t u r e of t h e p r o d u c t s i s c o n f i r m e d b y decomp o s l ' t i o n of t h e c o g r e s p d n d i n g a z o compounds a n d t h e i r c o n f i g u r a t i o n is d e t e rm,'vied unambiguously by X -r a y s a n a l y s i s . T h e d i f f e r e n c e s b e t w e e n meso and r a c evie d i m c r s a r e a n a l y z e d w i $ h r e g a r d t q g t h e i r m e l t i n g t e m p e r a t u r e s , c h r o m a t o g r a ~h l ' c r o t e n t i o n t i m e s , I R , H -N M R and C-NYR s p e c t r o s c o p i e s . T h e d i a s t e r e o i s om 7 r ' s m of t h e a z o -b i s -a l p h a p h e n y l a l k a n e s i s a l s o d i s c u s s e d .La deshydrodimerisation des alkylbenzhes par action du peroxyde de di-t.butyle(PDTB) conduit a la formation de bibenzyles qui existent sous deux 4 formes isomsres: le compose meso et le melange racernique( ) :Bien que la reaction ait deja ete Ctudiee pour certains alkylbenzenes, la determination exacte des produits de reaction est rarement effectube. Lorsque deux produits seulement sont isoles du melange reactionnel, les auteurs admettent generalement que le compose le moins soluble et presentant le point de fusion le plus eleve est le meso, l'autre Btant constitue du melange racemique. Cette rsgle ne doit pas &re prise pour absolue car elle connalt plusieurs exceptions surtout lorsque R1 (ou R2) est un groupe polaire comme OH , CN ,

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Réactions De Deshydrodimérisation Radicalaire. 4. Action Du Peroxyde De Di‐t.Butyle Sur Les Alkylbenzenes: Diastéréomerie Des Dérivés Bibenzyles (

Gouverneur

Mulangala

1977

Bulletin des Soc Chimique

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ChemInform Abstract: RETENTIONSINDICES VON CYCLOALKANEN, CYCLOALKENEN, BICYCLOALKYLEN, CYCLOALKYL‐CYCLOALKENYLEN UND BICYCLOALKENYLEN IND DER GASCHROMATOGRAPHIE

Besson¹,

Gaeumann²

1973

Chemischer Informationsdienst

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L'indice de rétention des alcanes isomères en chromatographie en phase gazeuse

Rappoport

Gäumann

1973

Helvetica Chimica Acta

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A method, using the radiolysis of an alkane, for the obtention of a great number of branched hydrocarbons is given. The retention index at 100° as well as its variation with temperature is determined on Apiezon L for 200 alcanes containing between seven and twenty four carbons. It is shown that for branched hydrocarbons the decrease of the retention index is mainly due to the length of the substituent group but also to its position on the chain. Some rules between retention index and molecular structure are deduced that allow the determination of the index of higher branched hydrocarbons. It is also shown that the variation of the retention index with temperature is only a function of the length of the substituent group.

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Indices de rétention de cycloalcanes, cycloalcènes, bicycloalkyles, cycloalkyl‐cycloalcényles et bicycloalcényles en chromatographie en phase gazeuse

Abstract: The retention indices for cycloalkanes, cycloalkenes and bicyclic compounds have been measured as a function of temperature for different liquids phases. The diastereomeric bicycloalkenyl‐2 were separated. Some rules concerning the indices are given.

Cited by 5 publications

References 6 publications

Réactions De Deshydrodimérisation Radicalaire. 4. Action Du Peroxyde De Di‐t.Butyle Sur Les Alkylbenzenes: Diastéréomerie Des Dérivés Bibenzyles (

Réactions De Deshydrodimérisation Radicalaire. 4. Action Du Peroxyde De Di‐t.Butyle Sur Les Alkylbenzenes: Diastéréomerie Des Dérivés Bibenzyles (

ChemInform Abstract: RETENTIONSINDICES VON CYCLOALKANEN, CYCLOALKENEN, BICYCLOALKYLEN, CYCLOALKYL‐CYCLOALKENYLEN UND BICYCLOALKENYLEN IND DER GASCHROMATOGRAPHIE

L'indice de rétention des alcanes isomères en chromatographie en phase gazeuse

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