About: 29Si-13C Spin-Spin Couplings over Si-O-Carom Link

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

About: 29Si-13C Spin-Spin Couplings over Si-O-Carom Link 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	29Si-13C interakce byly změřeny v para substituovaných silylovaných fenolech, X-C6H4-O-SiR1R2R3 (X = NO2, CF3, Cl, F, H, CH3, CH3O). Jako SiR1R2R3 silyl byly použity trimethylsilyl (Si(CH3)3, TMS), tert-butyldimethylsilyl (Si(CH3)2C(CH3)3, TBDMS), dimethylsilyl (SiH(CH3)2, DMS) a tert-butyldiphenylsilyl (Si(C6H5)2C(CH3)3, TBDPS). Hodnoty interakcí závisí na substituentech na křemíku. Interakce přes dvě a tři vazby nazávisí na substituentech benzenového jádra. Interakce přes 4 a více vazeb jsou ovlivněny substituentem. (cs) 29Si-13C couplings were measured in para substituted silylated phenols, X-C6H4-O-SiR1R2R3 (X = NO2, CF3, Cl, F, H, CH3, CH3O). The SiR1R2R3 silyl groups included trimethylsilyl (Si(CH3)3, TMS), tert-butyldimethylsilyl (Si(CH3)2C(CH3)3, TBDMS), dimethylsilyl (SiH(CH3)2, DMS), and tert-butyldiphenylsilyl (Si(C6H5)2C(CH3)3, TBDPS). Previously developed (Si,C,Si)gHMQC methods and narrow 29Si lines allowed determination of coupling constants over up to five bonds. The measurable couplings depend on the nature of the substituents on the silicon. The two- and three-bond couplings are not affected by ring substitution in the para position. These properties render the 29Si-13C couplings suitable for line assignment in the spectra of silylated polyphenols. The calculations show that the 2-bond and 3-bond couplings, which are of a similar magnitude, are of opposite sign. The four- and five-bond couplings are affected by the substituent X in a not trivial manner. 29Si-13C couplings were measured in para substituted silylated phenols, X-C6H4-O-SiR1R2R3 (X = NO2, CF3, Cl, F, H, CH3, CH3O). The SiR1R2R3 silyl groups included trimethylsilyl (Si(CH3)3, TMS), tert-butyldimethylsilyl (Si(CH3)2C(CH3)3, TBDMS), dimethylsilyl (SiH(CH3)2, DMS), and tert-butyldiphenylsilyl (Si(C6H5)2C(CH3)3, TBDPS). Previously developed (Si,C,Si)gHMQC methods and narrow 29Si lines allowed determination of coupling constants over up to five bonds. The measurable couplings depend on the nature of the substituents on the silicon. The two- and three-bond couplings are not affected by ring substitution in the para position. These properties render the 29Si-13C couplings suitable for line assignment in the spectra of silylated polyphenols. The calculations show that the 2-bond and 3-bond couplings, which are of a similar magnitude, are of opposite sign. The four- and five-bond couplings are affected by the substituent X in a not trivial manner. (en)
Title	29Si-13C Spin-Spin Couplings over Si-O-Carom Link 29Si-13C Spin-Spin Couplings over Si-O-Carom Link (en) 29Si-13C Spin-spinové interakce přes Si-O-carom spojení (cs)
skos:prefLabel	29Si-13C Spin-Spin Couplings over Si-O-Carom Link 29Si-13C Spin-Spin Couplings over Si-O-Carom Link (en) 29Si-13C Spin-spinové interakce přes Si-O-carom spojení (cs)
skos:notation	RIV/67985858:_____/06:00054948!RIV07-AV0-67985858
http://linked.open.../vavai/riv/strany	669;674
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA203/03/1566), P(GA203/05/0388), P(GP203/02/D176), Z(AV0Z40550506), Z(AV0Z40720504)
http://linked.open...iv/cisloPeriodika	7
http://linked.open...vai/riv/dodaniDat	2007
http://linked.open...aciTvurceVysledku	Schraml, Jan Blechta, Vratislav Hetflejš, Jiří Sýkora, Jan Šabata, Stanislav Soukupová, Ludmila
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	Ústav chemických procesů AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	510623
http://linked.open...ai/riv/idVysledku	RIV/67985858:_____/06:00054948
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	spinspin coupling; coupling mechanism; sign of coupling constants (en)
http://linked.open.../riv/klicoveSlovo	coupling mechanism sign of coupling constants spinspin coupling
http://linked.open...odStatuVydavatele	GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV	[2C40BB43A46A]
http://linked.open...i/riv/nazevZdroje	Magnetic Resonance in Chemistry
http://linked.open...in/vavai/riv/obor	CF
http://linked.open...ichTvurcuVysledku	6 (xsd:int)
http://linked.open...cetTvurcuVysledku	7 (xsd:int)
http://linked.open...vavai/riv/projekt	NMR spectroscopy in solutions Conformational dynamics of nucleic acids The 29Si-13C couplings in the Si-O-C fragment
http://linked.open...UplatneniVysledku	2006
http://linked.open...v/svazekPeriodika	44
http://linked.open...iv/tvurceVysledku	Schraml, Jan Sychrovský, Vladimír Sýkora, Jan Blechta, Vratislav Hetflejš, Jiří Šabata, Stanislav Soukupová, Ludmila
http://linked.open...n/vavai/riv/zamer	Regulace biologických procesů: Chemické modulátory vybraných systémů významných pro medicínu a zemědělství Investigation of multiphase reacting systems for the design of processes important in synthesis and preparation of novel materials, in energy production and in environmental protection
issn	0749-1581
number of pages	6 (xsd:int)

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, 24 GB memory in use)
Data on this page belongs to its respective rights holders.
Virtuoso Faceted Browser Copyright © 2009-2024 OpenLink Software