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Statements

Subject Item
n2:RIV%2F60461373%3A22640%2F01%3A00004541%21RIV%2F2004%2FGA0%2F226404%2FN
rdf:type
skos:Concept n18:Vysledek
dcterms:description
Fischer carbene complexes of transition metals have found wide synthetic applications. Processes like the cyclopropanation1 and the metathesis or polymerisation of olefins2 are of equal industrial and theoretical importance. Significant intermediates in these reactions are carbene-(h2-alkene) complexes that are usually not stable and could be isolated only in exceptional cases. However, chelated (h2-allylamino)carbene complexes of Cr, W and Fe are stable and can therefore serve as a model for study of the properties of carbene-(h2-alkene) complexes of transition metals.Among other interesting features of these systems restricted rotation around aromate - carbene carbon bond has been observed. The aim of this study was to find the origin of the restricted rotation and to examine factors that influence activation parameters. Full line shape analyses of signals of diastereotopic ortho aromatic protons in carbene complexes of Cr, W and Fe (Fig. 1) was performed by the use of program gNMR 4.1. The values o Fischer carbene complexes of transition metals have found wide synthetic applications. Processes like the cyclopropanation1 and the metathesis or polymerisation of olefins2 are of equal industrial and theoretical importance. Significant intermediates in these reactions are carbene-(h2-alkene) complexes that are usually not stable and could be isolated only in exceptional cases. However, chelated (h2-allylamino)carbene complexes of Cr, W and Fe are stable and can therefore serve as a model for study of the properties of carbene-(h2-alkene) complexes of transition metals.Among other interesting features of these systems restricted rotation around aromate - carbene carbon bond has been observed. The aim of this study was to find the origin of the restricted rotation and to examine factors that influence activation parameters. Full line shape analyses of signals of diastereotopic ortho aromatic protons in carbene complexes of Cr, W and Fe (Fig. 1) was performed by the use of program gNMR 4.1. The values o
dcterms:title
Conformational and D-NMR study of chelated (h2-diallylamino) carbene complexes of Cr, W and Fe. Conformational and D-NMR study of chelated (h2-diallylamino) carbene complexes of Cr, W and Fe.
skos:prefLabel
Conformational and D-NMR study of chelated (h2-diallylamino) carbene complexes of Cr, W and Fe. Conformational and D-NMR study of chelated (h2-diallylamino) carbene complexes of Cr, W and Fe.
skos:notation
RIV/60461373:22640/01:00004541!RIV/2004/GA0/226404/N
n3:strany
9
n3:aktivita
n21:P
n3:aktivity
P(GA203/00/1240)
n3:dodaniDat
n10:2004
n3:domaciTvurceVysledku
n8:7241852 n8:5078008 n8:8169985
n3:druhVysledku
n15:D
n3:duvernostUdaju
n9:S
n3:entitaPredkladatele
n14:predkladatel
n3:idSjednocenehoVysledku
676262
n3:idVysledku
RIV/60461373:22640/01:00004541
n3:jazykVysledku
n20:eng
n3:klicovaSlova
carbene complexes, transition metals, D-NMR
n3:klicoveSlovo
n5:transition%20metals n5:carbene%20complexes n5:D-NMR
n3:kontrolniKodProRIV
[31908AE4C8BC]
n3:mistoKonaniAkce
Valtice, ČR
n3:mistoVydani
Neuveden
n3:nazevZdroje
Central European NMR Discussion Groups
n3:obor
n11:CC
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
4
n3:pocetUcastnikuAkce
0
n3:pocetZahranicnichUcastnikuAkce
0
n3:projekt
n6:GA203%2F00%2F1240
n3:rokUplatneniVysledku
n10:2001
n3:tvurceVysledku
Tobrman, Tomáš Dvořáková, Hana Dvořák, Dalimil Tkadlecová, Marcela
n3:typAkce
n16:EUR
n3:zahajeniAkce
2001-04-23+02:00
s:numberOfPages
1
n7:hasPublisher
Masarykova univerzita
n17:isbn
80-210-2566-2
n13:organizacniJednotka
22640