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Statements

Subject Item
n2:RIV%2F61388980%3A_____%2F02%3A50025007%21RIV%2F2003%2FGA0%2FA50003%2FN
rdf:type
n10:Vysledek skos:Concept
dcterms:description
Preparative routes to 8-hydroxy-bis(1,2-dicarbollido)-3-cobalt(1-)ate (2) and 8,8 -dihydroxy-bis(1,2-dicarbollido)-3-cobalt(1-)ate (3) ions are reported by the reductive acetoxylation of the parent bis(dicarbollido)cobaltate ion (1) followed by hydrolysis of the intermediates. The essential reagent is acetic anhydride, and strong acids are required as catalysts. For the hydroxyderivative ion 2 the simultaneous presence of acetic acid brings benefit, whereas it is detrimental for the formation of the dihydroxyderivative 3. Reaction intermediate leading to the dihydroxy derivative is the already reported [8,8 - -CH3C(O)2(1,2-C2B9H10)2-3-Co]0 zwitterion. This compound was adequately characterised for the first time and its molecular structure as determined by X-ray diffraction analysis is presented. Both B-hydroxylated bis(dicarbollido)-ions can be alternatively obtained on the direct hydroxylation of the parent ion by hot 60-80 sulphuric acid. Optimised synthetic procedures and the main physicochemical Preparative routes to 8-hydroxy-bis(1,2-dicarbollido)-3-cobalt(1-)ate (2) and 8,8 -dihydroxy-bis(1,2-dicarbollido)-3-cobalt(1-)ate (3) ions are reported by the reductive acetoxylation of the parent bis(dicarbollido)cobaltate ion (1) followed by hydrolysis of the intermediates. The essential reagent is acetic anhydride, and strong acids are required as catalysts. For the hydroxyderivative ion 2 the simultaneous presence of acetic acid brings benefit, whereas it is detrimental for the formation of the dihydroxyderivative 3. Reaction intermediate leading to the dihydroxy derivative is the already reported [8,8 - -CH3C(O)2(1,2-C2B9H10)2-3-Co]0 zwitterion. This compound was adequately characterised for the first time and its molecular structure as determined by X-ray diffraction analysis is presented. Both B-hydroxylated bis(dicarbollido)-ions can be alternatively obtained on the direct hydroxylation of the parent ion by hot 60-80 sulphuric acid. Optimised synthetic procedures and the main physicochemical
dcterms:title
Syntheses of the B(8)-hydroxy- and B(8,8 )-dihydroxy-derivatives of the bis(1,2-dicarbollido)-3-cobalt(1-)ate ion by its reductive acetoxylation and hydroxylation: molecular structure of [8,8 - -CH3C(O)2(1,2-C2B9H10)2-3-Co]0 zwitterion determined by X-ra Syntheses of the B(8)-hydroxy- and B(8,8 )-dihydroxy-derivatives of the bis(1,2-dicarbollido)-3-cobalt(1-)ate ion by its reductive acetoxylation and hydroxylation: molecular structure of [8,8 - -CH3C(O)2(1,2-C2B9H10)2-3-Co]0 zwitterion determined by X-ra
skos:prefLabel
Syntheses of the B(8)-hydroxy- and B(8,8 )-dihydroxy-derivatives of the bis(1,2-dicarbollido)-3-cobalt(1-)ate ion by its reductive acetoxylation and hydroxylation: molecular structure of [8,8 - -CH3C(O)2(1,2-C2B9H10)2-3-Co]0 zwitterion determined by X-ra Syntheses of the B(8)-hydroxy- and B(8,8 )-dihydroxy-derivatives of the bis(1,2-dicarbollido)-3-cobalt(1-)ate ion by its reductive acetoxylation and hydroxylation: molecular structure of [8,8 - -CH3C(O)2(1,2-C2B9H10)2-3-Co]0 zwitterion determined by X-ra
skos:notation
RIV/61388980:_____/02:50025007!RIV/2003/GA0/A50003/N
n4:strany
181;190
n4:aktivita
n14:P n14:Z
n4:aktivity
P(GA104/99/1096), P(GA203/99/M037), Z(AV0Z4032918)
n4:cisloPeriodika
2
n4:dodaniDat
n6:2003
n4:domaciTvurceVysledku
n13:8968721 n13:5578221 n13:8071845 n13:7998945
n4:druhVysledku
n15:J
n4:duvernostUdaju
n17:S
n4:entitaPredkladatele
n16:predkladatel
n4:idSjednocenehoVysledku
666097
n4:idVysledku
RIV/61388980:_____/02:50025007
n4:jazykVysledku
n12:eng
n4:klicovaSlova
bis(1,2-dicarbollido)-3-cobalt(1-)ate ion; carbaboranes; metallacarboranes
n4:klicoveSlovo
n7:2-dicarbollido%29-3-cobalt%281-%29ate%20ion n7:bis%281 n7:metallacarboranes n7:carbaboranes
n4:kodStatuVydavatele
GB - Spojené království Velké Británie a Severního Irska
n4:kontrolniKodProRIV
[0BAEE1AE6BF4]
n4:nazevZdroje
Journal of Organometallic Chemistry
n4:obor
n11:CA
n4:pocetDomacichTvurcuVysledku
4
n4:pocetTvurcuVysledku
5
n4:pocetUcastnikuAkce
0
n4:pocetZahranicnichUcastnikuAkce
0
n4:projekt
n18:GA203%2F99%2FM037 n18:GA104%2F99%2F1096
n4:rokUplatneniVysledku
n6:2002
n4:svazekPeriodika
649
n4:tvurceVysledku
Plešek, Jaromír Císařová, I. Fusek, Jiří Báča, Jiří Grüner, Bohumír
n4:zamer
n9:AV0Z4032918
s:issn
0022-328X
s:numberOfPages
10