About: NMR Evidence for Protonated Tetraethyl p-tert-Butylcalix[4]arene Tetraacetate

Facets (new session)
Description
Metadata
Settings
- owl:sameAs
- Inference Rule:

About: NMR Evidence for Protonated Tetraethyl p-tert-Butylcalix[4]arene Tetraacetate Goto Sponge NotDistinct Permalink

An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

Attributes	Values
rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	In addition to well-known complexes of tetraethyl p-tert- butylcalix[4]arene tetraacetate (abbrev. 1) with alkali metal cations, an equimolar complex of this compound with H3O+, i.e. 1.H3O+, was found to be formed slowly in acetonitrile, however, with a very high equilibrium constant, the value of which is beyond the possibilities of exact determination by NMR. Hydrogen bis(1,2-dicarbollyl) cobaltate (HDCC) was used as a proton source. Further, by a combination of 1D and 2D 1H NMR with 13C NMR spectra, it was proved that the ester carbonyls of 1 are not strongly involved in coordination of H3O+. It means that the most probable structure of the 1.H3O+ complex is obviously that with H3O+ bound by strong hydrogen bonds to the phenoxy oxygen atoms of 1. In addition to well-known complexes of tetraethyl p-tert- butylcalix[4]arene tetraacetate (abbrev. 1) with alkali metal cations, an equimolar complex of this compound with H3O+, i.e. 1.H3O+, was found to be formed slowly in acetonitrile, however, with a very high equilibrium constant, the value of which is beyond the possibilities of exact determination by NMR. Hydrogen bis(1,2-dicarbollyl) cobaltate (HDCC) was used as a proton source. Further, by a combination of 1D and 2D 1H NMR with 13C NMR spectra, it was proved that the ester carbonyls of 1 are not strongly involved in coordination of H3O+. It means that the most probable structure of the 1.H3O+ complex is obviously that with H3O+ bound by strong hydrogen bonds to the phenoxy oxygen atoms of 1. (en) Bylo zjištěno, že tetraethyl p-terc- butylkalix[4]aren tetraacetát tvoří v acetonitrilu equimolární komplex s iontem H3O+. Na základě 1H a 13C NMR spekter byla stanovena pravděpodobná struktura vznikajícího komplexu. (cs)
Title	NMR Evidence for Protonated Tetraethyl p-tert-Butylcalix[4]arene Tetraacetate NMR Evidence for Protonated Tetraethyl p-tert-Butylcalix[4]arene Tetraacetate (en) NMR důkaz protonizace tetraethyl p-terc-butylcalix[4]arenu tetraacetátu (cs)
skos:prefLabel	NMR Evidence for Protonated Tetraethyl p-tert-Butylcalix[4]arene Tetraacetate NMR Evidence for Protonated Tetraethyl p-tert-Butylcalix[4]arene Tetraacetate (en) NMR důkaz protonizace tetraethyl p-terc-butylcalix[4]arenu tetraacetátu (cs)
skos:notation	RIV/60461373:22340/07:00019596!RIV08-MSM-22340___
http://linked.open.../vavai/riv/strany	1321-1326
http://linked.open...avai/riv/aktivita	S Z
http://linked.open...avai/riv/aktivity	S, Z(MSM4977751303)
http://linked.open...iv/cisloPeriodika	7
http://linked.open...vai/riv/dodaniDat	2008
http://linked.open...aciTvurceVysledku	Vaňura, Petr
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Vysoká škola chemicko-technologická v Praze / Fakulta chemicko-inženýrská
http://linked.open...dnocenehoVysledku	437393
http://linked.open...ai/riv/idVysledku	RIV/60461373:22340/07:00019596
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	Calix[4]arene; protonation; NMR; acetonitrile (en)
http://linked.open.../riv/klicoveSlovo	NMR acetonitrile protonation Calix[4]arene
http://linked.open...odStatuVydavatele	PL - Polská republika
http://linked.open...ontrolniKodProRIV	[D2301279F13D]
http://linked.open...i/riv/nazevZdroje	Polish Journal of Chemistry
http://linked.open...in/vavai/riv/obor	CB
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...UplatneniVysledku	2007
http://linked.open...v/svazekPeriodika	81
http://linked.open...iv/tvurceVysledku	Makrlík, E. Vaňura, Petr Kříž, J. Dybal, J.
http://linked.open...n/vavai/riv/zamer	Predikce poruch heterogenních materiálů, komponent mechanických a biomechanických systémů.
issn	0137-5083
number of pages	6 (xsd:int)
http://localhost/t...ganizacniJednotka	22340

Faceted Search & Find service v1.16.118 as of Jun 21 2024

Alternative Linked Data Documents: ODE Content Formats:

RDF

ODATA

Microdata

About

OpenLink Virtuoso version 07.20.3240 as of Jun 21 2024, on Linux (x86_64-pc-linux-gnu), Single-Server Edition (126 GB total memory, 48 GB memory in use)
Data on this page belongs to its respective rights holders.
Virtuoso Faceted Browser Copyright © 2009-2024 OpenLink Software