Non-cyclopentadienyl lanthanide dihydrides [{(TpR,R′)LnH2}n] (R,R′=Me, n=4; R,R′=H, n=6) and [{(Tp)YH2}3(thf)2–3] were isolated and characterized. Their polynuclear frameworks are maintained in solution, and their nuclearity depends on the ligand and the solvent used in their preparation. The structure of [{(Tp)YH2}4] is shown (B red, H white, N blue, Y orange). TpR,R′=tris(3-R-5-R′-pyrazolyl)borate.
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Cheng et al. (2008) studied this question.
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