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231223s2008 xx |||||o 00| ||eng c |
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|a 10.1002/mrc.2300
|2 doi
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|a pubmed24n0610.xml
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|a (DE-627)NLM183024761
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|a (NLM)18855340
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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|a Carlton, Laurence
|e verfasserin
|4 aut
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|a A tungsten-183NMR study of cis and trans isomers of [W(CO)4(PPh3)(PR3)](PR3 = phosphine, phosphite)
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|c 2008
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 17.12.2008
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|a Date Revised 21.11.2013
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|a published: Print
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|a Citation Status MEDLINE
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|a Tungsten-183 NMR data are reported for the complexes cis- and trans-[W(CO)4(PPh3)(PR3)] (PR3 = PnBu3, PMe3, PMe2Ph, PMePh2, PPh3, P(4-C6H4OMe)3, P(4-C6H4Me)3, P(4-C6H4F)3, P(OMe)3, P(OEt)3, P(OPh)3 and for PCy3, P(NMe2)3(trans isomer only). The 183W chemical shift (obtained by indirect detection using 31P) is found to be related to the PR3 ligand parameters nu and theta (Tolman electronic factor and cone angle, respectively) for the cis isomers and to nu (but only poorly to theta) for the trans isomers. The 183W-31P spin coupling constant is also related, less clearly for P-C than for P-N and P-O bonded ligands, to nu. Chemical shifts are referenced to an absolute frequency Xi (183W) = 4.15 MHz, which is proposed as a calibration standard for 183W NMR. The structures of cis-[W(CO)4(PPh3)(PMe3)] and cis-[W(CO)4(PPh3){P(4-C6H4F)3}] are reported
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|a Journal Article
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|a Ligands
|2 NLM
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|a Organometallic Compounds
|2 NLM
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|a Phosphines
|2 NLM
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|a Phosphites
|2 NLM
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|a Tungsten
|2 NLM
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|a V9306CXO6G
|2 NLM
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|a Emdin, Avril
|e verfasserin
|4 aut
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|a Lemmerer, Andreas
|e verfasserin
|4 aut
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|a Fernandes, Manuel A
|e verfasserin
|4 aut
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|i Enthalten in
|t Magnetic resonance in chemistry : MRC
|d 1985
|g 46 Suppl 1(2008) vom: 15., Seite S56-62
|w (DE-627)NLM098179667
|x 1097-458X
|7 nnns
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|g volume:46 Suppl 1
|g year:2008
|g day:15
|g pages:S56-62
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|u http://dx.doi.org/10.1002/mrc.2300
|3 Volltext
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|a AR
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|d 46 Suppl 1
|j 2008
|b 15
|h S56-62
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