About: The Effect of Solvent Accessible Surface on Hammett-Type Dependencies of Infinite Dilution 29Si and 13C NMR Shifts in Ring Substituted Silylated Phenols Dissolved in Chloroform and Acetone

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About: The Effect of Solvent Accessible Surface on Hammett-Type Dependencies of Infinite Dilution 29Si and 13C NMR Shifts in Ring Substituted Silylated Phenols Dissolved in Chloroform and Acetone Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Infinite dilution 29Si and 13C NMR chemical shifts were determined from concentration dependences in dilute chloroform and acetone solutions of para substituted silylated phenols, 4 R C6H4 O –SiR'2R'' (R = Me, MeO, H, F, Cl, NMe2, NH2, and CF3) where the silyl part included groups of different sizes: dimethylsilyl (DMS, R' = Me, R'' = H), trimethylsilyl (TMS, R' = R'' = Me), tert. butyldimethylsilyl (TBDMS, R' = Me, R'' = CMe3) and tert. butyldiphenylsilyl (TBDPS, R' = C6H5, R'' = CMe3). Dependences of the silicon and C-1 carbon chemical shifts on Hammett substituent constants are discussed. It is shown that substituent sensitivity of these chemical shifts is reduced by association with chloroform, the reduction being proportional to solvent accessible surface of the oxygen atom in the Si-O-C link. Infinite dilution 29Si and 13C NMR chemical shifts were determined from concentration dependences in dilute chloroform and acetone solutions of para substituted silylated phenols, 4 R C6H4 O –SiR'2R'' (R = Me, MeO, H, F, Cl, NMe2, NH2, and CF3) where the silyl part included groups of different sizes: dimethylsilyl (DMS, R' = Me, R'' = H), trimethylsilyl (TMS, R' = R'' = Me), tert. butyldimethylsilyl (TBDMS, R' = Me, R'' = CMe3) and tert. butyldiphenylsilyl (TBDPS, R' = C6H5, R'' = CMe3). Dependences of the silicon and C-1 carbon chemical shifts on Hammett substituent constants are discussed. It is shown that substituent sensitivity of these chemical shifts is reduced by association with chloroform, the reduction being proportional to solvent accessible surface of the oxygen atom in the Si-O-C link. (en)
Title	The Effect of Solvent Accessible Surface on Hammett-Type Dependencies of Infinite Dilution 29Si and 13C NMR Shifts in Ring Substituted Silylated Phenols Dissolved in Chloroform and Acetone The Effect of Solvent Accessible Surface on Hammett-Type Dependencies of Infinite Dilution 29Si and 13C NMR Shifts in Ring Substituted Silylated Phenols Dissolved in Chloroform and Acetone (en)
skos:prefLabel	The Effect of Solvent Accessible Surface on Hammett-Type Dependencies of Infinite Dilution 29Si and 13C NMR Shifts in Ring Substituted Silylated Phenols Dissolved in Chloroform and Acetone The Effect of Solvent Accessible Surface on Hammett-Type Dependencies of Infinite Dilution 29Si and 13C NMR Shifts in Ring Substituted Silylated Phenols Dissolved in Chloroform and Acetone (en)
skos:notation	RIV/67985858:_____/12:00375412!RIV13-GA0-67985858
http://linked.open...avai/predkladatel	Ústav chemických procesů Akademie Věd ČR, v.v.i.
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA203/06/0738), P(IAA400720706), Z(AV0Z40720504)
http://linked.open...iv/cisloPeriodika	2
http://linked.open...vai/riv/dodaniDat	2013
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	133265
http://linked.open...ai/riv/idVysledku	RIV/67985858:_____/12:00375412
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	1H NMR; 13C NMR; 29Si NMR (en)
http://linked.open.../riv/klicoveSlovo	13C NMR 29Si NMR 1H NMR
http://linked.open...odStatuVydavatele	GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV	[2FDA51A85137]
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	6 (xsd:int)
http://linked.open...vavai/riv/projekt	Structure of silyl moieties through J(29Si-13C) couplings as determined by triple {1H, 13C}29Si NMR experiments Advanced techniques for 29Si NMR spectroscopy
http://linked.open...UplatneniVysledku	2012
http://linked.open...v/svazekPeriodika	50
http://linked.open...iv/tvurceVysledku	Schraml, Jan Sýkora, Jan Blechta, Vratislav Hetflejš, Jiří Šabata, Stanislav Soukupová, Ludmila
http://linked.open...ain/vavai/riv/wos	000301235100006
http://linked.open...n/vavai/riv/zamer	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	7 (xsd:int)
http://bibframe.org/vocab/doi	10.1002/mrc.2860
is http://linked.open...avai/riv/vysledek of	The Effect of Solvent Accessible Surface on Hammett-Type Dependencies of Infinite Dilution 29Si and 13C NMR Shifts in Ring Substituted Silylated Phenols Dissolved in Chloroform and Acetone

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