Some oxygen-donor complexes of cyclopentadienyluranium(IV)N-thiocyanate; steric considerations and stability
- 1 January 1982
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in J. Chem. Soc., Dalton Trans.
- No. 7,p. 1365-1369
- https://doi.org/10.1039/dt9820001365
Abstract
The oxygen-donor complexes [U(cp)(NCS)3L2][cp =η-C5H5, L = Me3CCONMe2(dmpva), Me2CHCONMe2(dmiba), PPh3O, and P(NMe2)3O (tdpo)] have been prepared and i.r. and u.v.–visible (solution and solid reflectance) spectra are reported for them. Analogous complexes with L = MeCONMe2(dma), EtCONMe2(dmpa), EtCONEt2(depa), pyridine, and 2,2′-bipyridyl could not be isolated and disproportionation to [U(cp)3(NCS)] and [U(NCS)4Lx] occurred. The observations are discussed in terms of the steric crowding about the uranium atom using a cone-packing model.Keywords
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