1242653-01-5Relevant academic research and scientific papers
Organometallic uranium(IV) fluoride complexes: Preparation using protonolysis chemistry and reactivity with trimethylsilyl reagents
Thomson, Robert K.,Graves, Christopher R.,Scott, Brian L.,Kiplinger, Jaqueline L.
, p. 6826 - 6831 (2010)
Reaction of the uranium alkyl complex (C5Me5) 2UMe2 (1) with Et3N·3HF in toluene in the presence of a donor ligand (pyridine or trimethylphosphine oxide) results in gas evolution and the formation of the uranium(iv) difluoride complexes (C 5Me5)2UF2(L) (L = NC 5H5 (2), Me3PO (3)). Similarly, reaction of (C5Me5)2U[κ2-(C,N)-CH 2Si(CH3)2N(SiMe3)] (5) with Et 3N·3HF in toluene gives the uranium(iv) amide-fluoride complex (C5Me5)2U[N(SiMe3)2](F) (6). The fluoride complex (C5Me5)2UF 2(NC5H5) (2) shows versatile reaction chemistry with a variety of trimethylsilyl reagents and demonstrates that the U-F bond provides an attractive synthetic strategy for accessing new functional groups that are not available from alkoxide or chloride complexes. The Royal Society of Chemistry 2010.
Uncovering alternate reaction pathways to access uranium(IV) mixed-ligand aryloxide-chloride and alkoxide-chloride metallocene complexes: Synthesis and molecular structures of (C5Me5)2U(O-2,6- iPr2C6H3)(Cl) and (C 5Me5)2U(O-tBu)(Cl)
Thomson, Robert K.,Graves, Christopher R.,Scott, Brian L.,Kiplinger, Jaqueline L.
, p. 270 - 273 (2011)
Reaction of the trivalent uranium complex (C5Me 5)2U(O-2,6-iPr2C6H 3)(THF) (1) with copper(I) chloride affords the corresponding tetravalent mixed-ligand aryloxide-chloride complex (C5Me 5)2U(O-2,6-iPr2C6H 3)(Cl) (2). The oxidative functionalization protocol cannot be extended to the synthesis of (C5Me5)2U(O- tBu)(Cl) (3) since the corresponding trivalent precursor is not stable. Salt metathesis between (C5Me5) 2UCl2 and KOtBu is the method of choice for the preparation of the tetravalent alkoxide-chloride derivative (C 5Me5)2U(O-tBu)(Cl) (3). The X-ray crystal structures of (C5Me5)2U(O-2,6- iPr2C6H3)(Cl) (2) and (C 5Me5)2U(O-tBu)(Cl) (3) are reported and represent the first structurally characterized uranium(IV) metallocene aryloxide-chloride and alkoxide-chloride complexes, respectively. Both complexes adopt a pseudo-tetrahedral geometry, with a chloride and aryloxide/alkoxide ligand occupying the plane bisecting the metallocene unit.
