| Attributes | Values |
|---|
| rdf:type
| |
| Description
| - Substituted chromium aminocarbene complexes cis-tetracarbonyl[(h2-N-allyl-N-allylamino)(4-X-phenyl)carbene]chromium(0) (X = MeO, Me, H, Cl, CO2Me and CF3) were prepared by the reaction of the corresponding N,N-diallylamides with Na2Cr(CO)5 and Me3SiCl. Using dynamic NMR, the rotational barrier of the aryl ring in these complexes was established. The obtained values are higher for the complexes bearing electron-acceptors compared to those bearing donor substituents and correspond with the Hammett equation. This indicates that the restricted rotation of aryl ring in the chromium aminocarbene complexes is a balance between steric and conjugation effects; while the former increases the barrier, the latter decreases it by stabilizing of the transition state of the rotation. This finding is compatible with the fact, that in the related cis-tetracarbonyl[(N-alkyl-h2-N-allylamino)(phenyl)carbene]chromium(0) complexes (alkyl = Me, Et and i-Pr) the rotational barrier grows steadily with the growing steric deman
- Substituted chromium aminocarbene complexes cis-tetracarbonyl[(h2-N-allyl-N-allylamino)(4-X-phenyl)carbene]chromium(0) (X = MeO, Me, H, Cl, CO2Me and CF3) were prepared by the reaction of the corresponding N,N-diallylamides with Na2Cr(CO)5 and Me3SiCl. Using dynamic NMR, the rotational barrier of the aryl ring in these complexes was established. The obtained values are higher for the complexes bearing electron-acceptors compared to those bearing donor substituents and correspond with the Hammett equation. This indicates that the restricted rotation of aryl ring in the chromium aminocarbene complexes is a balance between steric and conjugation effects; while the former increases the barrier, the latter decreases it by stabilizing of the transition state of the rotation. This finding is compatible with the fact, that in the related cis-tetracarbonyl[(N-alkyl-h2-N-allylamino)(phenyl)carbene]chromium(0) complexes (alkyl = Me, Et and i-Pr) the rotational barrier grows steadily with the growing steric deman (en)
- Pomocí 1H NMR byly stanoveny bariéry rotace aromátu v cis-tetrakarbonyl[(h2-N-allyl-N-allylamino)(4-X-fenyl)carben]chromium(0) (X = MeO, Me, H, Cl, CO2Me and CF3) . (cs)
|
| Title
| - Study of the Origin of the Hindered Rotation of an Aryl Ring in the Chromium Aminocarbene Complexes Bearing Aromatic Ring Attached to the Carbene Carbon Atom.
- Study of the Origin of the Hindered Rotation of an Aryl Ring in the Chromium Aminocarbene Complexes Bearing Aromatic Ring Attached to the Carbene Carbon Atom. (en)
- Studium původu bráněné rotace aromátu v aminokarbenových komplexech chromu nesoucích aromatický kruh vázaný na karbenový atom uhlíku. (cs)
|
| skos:prefLabel
| - Study of the Origin of the Hindered Rotation of an Aryl Ring in the Chromium Aminocarbene Complexes Bearing Aromatic Ring Attached to the Carbene Carbon Atom.
- Study of the Origin of the Hindered Rotation of an Aryl Ring in the Chromium Aminocarbene Complexes Bearing Aromatic Ring Attached to the Carbene Carbon Atom. (en)
- Studium původu bráněné rotace aromátu v aminokarbenových komplexech chromu nesoucích aromatický kruh vázaný na karbenový atom uhlíku. (cs)
|
| skos:notation
| - RIV/60461373:22310/06:00016996!RIV07-GA0-22310___
|
| http://linked.open.../vavai/riv/strany
| |
| http://linked.open...avai/riv/aktivita
| |
| http://linked.open...avai/riv/aktivity
| - P(GA203/00/1240), P(GA203/04/0487)
|
| http://linked.open...iv/cisloPeriodika
| |
| http://linked.open...vai/riv/dodaniDat
| |
| http://linked.open...aciTvurceVysledku
| |
| http://linked.open.../riv/druhVysledku
| |
| http://linked.open...iv/duvernostUdaju
| |
| http://linked.open...titaPredkladatele
| |
| http://linked.open...dnocenehoVysledku
| |
| http://linked.open...ai/riv/idVysledku
| - RIV/60461373:22310/06:00016996
|
| http://linked.open...riv/jazykVysledku
| |
| http://linked.open.../riv/klicovaSlova
| - Chromium; Aminocarbenes; rotation barrier (en)
|
| http://linked.open.../riv/klicoveSlovo
| |
| http://linked.open...odStatuVydavatele
| - US - Spojené státy americké
|
| http://linked.open...ontrolniKodProRIV
| |
| http://linked.open...i/riv/nazevZdroje
| |
| http://linked.open...in/vavai/riv/obor
| |
| http://linked.open...ichTvurcuVysledku
| |
| http://linked.open...cetTvurcuVysledku
| |
| http://linked.open...vavai/riv/projekt
| |
| http://linked.open...UplatneniVysledku
| |
| http://linked.open...v/svazekPeriodika
| |
| http://linked.open...iv/tvurceVysledku
| - Černý, Jiří
- Dvořáková, Hana
- Dvořák, Dalimil
- Tobrman, Tomáš
- Meca, Luděk
|
| issn
| |
| number of pages
| |
| http://localhost/t...ganizacniJednotka
| |
![[RDF Data]](/fct/images/sw-rdf-blue.png)
![[cxml]](/fct/images/cxml_doc.png)
![[csv]](/fct/images/csv_doc.png)
![[text]](/fct/images/ntriples_doc.png)
![[turtle]](/fct/images/n3turtle_doc.png)
![[ld+json]](/fct/images/jsonld_doc.png)
![[rdf+json]](/fct/images/json_doc.png)
![[rdf+xml]](/fct/images/xml_doc.png)
![[atom+xml]](/fct/images/atom_doc.png)
![[html]](/fct/images/html_doc.png)