190076-36-9Relevant academic research and scientific papers
Activity of [Sm(C5Me5)3] in ethylene polymerization and synthesis of [U(C5Me5)3], the first tris(pentamethylcyclopentadienyl) 5f-element complex
Evans,Forrestal,Ziller
, p. 774 - 776 (1997)
Polymerization of ethylene is initiated by [Sm(C5Me5)3], an observation that led to a new synthetic route to this Sm(III) compound. Tetramethylfulvalene proved to be the crucial reagent and was also used in the synthesis of [U(C5Me5)3], the first tris(pentamethylcyclopentadienyl) complex of an actinide metal (see structure on right).
Multiple syntheses of (C5Me5)3U
Evans, William J.,Nyce, Gregory W.,Forrestal, Kevin J.,Ziller, Joseph W.
, p. 1050 - 1055 (2008/10/08)
Several new synthetic routes to the sterically crowded (C5Me5)3U complex have been developed. (C5Me5)3U can be prepared by (a) reaction of [(C5Me5)2UH2]2 with tetramethylfulvene, (b) reduction of (C5Me5)2Pb with (C5Me5)2UH(DMPE), (c) reaction of [(C5Me5)2U(L)]+ (L = THF, DMPE) with K(18-crown-6)(C5Me5), and (d) reaction of [(C5Me5)2U] [BPh4] with KC5Me3. Reaction of (C5Me5)2UH(DMPE) with C8H8 forms the product of the (C5Me5)3U/ C8H8 reaction, [(C8H8)(C5Me5)U]2(C8 H8). The X-ray crystal structures of the (C5Me5)2U[N(SiMe3)2] and [(C5Me5)2U] [BPh4] precursors used in this study are reported, as well as the convenient synthesis of a new trivalent uranium precursor, (C5Me5)2UMe2K.
