The complex bis-5,5‘-(1,3-propanediyldiimino)-2,2-dimethyl-4-hexen-3-onato samarium bis(trimethylsilyl)amido is a solvent- and halide-free anhydrous, monomeric lanthanide Schiff base complex. It was synthesized from triflate-derived homoleptic Sm[N(TMS)2]3 and isolated in excellent yields and analytical purity. For larger rare earths, only dimers were observed using analogous reaction pathways.
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Schuetz et al. (2001) studied this question.
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