Journal
ORGANOMETALLICS
Volume 32, Issue 5, Pages 1193-1198Publisher
AMER CHEMICAL SOC
DOI: 10.1021/om301004q
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Funding
- U.S. Department of Energy, Office of Basic Energy Sciences, Chemical Sciences, Biosciences, and Geosciences Division [DE-FG02-09ER16067]
- Division Of Chemistry
- Direct For Mathematical & Physical Scien [1040541] Funding Source: National Science Foundation
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Addition of 0.0625 equiv of S-8 to U(NR2)(3) (R = SiMe3) in Et2O generates [(R2N)(3)U](2)(mu-S) (1), which can be isolated in moderate yield by crystallization from cold Et2O. Interestingly, if the U(NR2)(3) starting material is contaminated with the U(IV) metallacycle U(CH2SiMe2NSiMe3)(NR2)(2), then a second product is also formed in the reaction with S-8, namely, [(R2N)(3)U](2)(mu-eta(2):eta(2)-S-2) (2). This species can be separated from 1, in low yield, by virtue of its insolubility in Et2O. Finally, addition of 0.5 equiv of E (E = Se, Te) to U(NR2)(3) (R = SiMe3) results in the formation of [(R2N)(3)U](2)(mu-E) (E = Se (3), Te (4)) in moderate yields. Complexes 1-4 were fully characterized, including analysis by X-ray crystallography.
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