Halometal derivatives of W12PO403- and related tungsten-183 NMR studies
✍ Scribed by Knoth, W. H.; Domaille, P. J.; Roe, D. C.
- Book ID
- 121378678
- Publisher
- American Chemical Society
- Year
- 1983
- Tongue
- English
- Weight
- 473 KB
- Volume
- 22
- Category
- Article
- ISSN
- 0020-1669
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📜 SIMILAR VOLUMES
183W NMR data are reported for a series of alkenylvinylideneÈ and alkenylcarbyneÈtungsten complexes of the type and [(dppe)(CO) 3 WxCxCHR], [(dppe)(CO) 3 WyCwCHxCR 2 ]`BF 4 [dppe \ 1,2-bis(diphenylphosphino)ethane]. Spectra were recorded using [(dppe)(CO) 2 LWyCwCHxCR 2 ] inverse 2D 1H,183Wand 31P,1
## Abstract 2D^1^H NOESY and inverse detected ^183^W NMR measurements for the pseudo‐octahedral η^3^‐allyl complexes W(CO)~2~(Tp′)(η^3^‐CH~2~CHCDPh) (1) and W(CO)~2~(Tp′)(η^3^‐CH~2~CHCHCH~3~) (2), where Tp′ = hydridotris(3,5‐dimethylpyrazolyl)borate are reported. The observed solution structure for
2 ) 3 (trans isomer only). The 183 W chemical shift (obtained by indirect detection using 31 P) is found to be related to the PR 3 ligand parameters ν and θ (Tolman electronic factor and cone angle, respectively) for the cis isomers and to ν (but only poorly to θ ) for the trans isomers. The 183 W-3