For several decades the reductive chemistry of the lanthanide metals in sol
uble, fully characterized molecular species has focused primarily on just t
hree elements: europium, ytterbium, and samarium. Recent developments sugge
st that the reductive chemistry of the lanthanides is likely to expand grea
tly beyond these three elements in the new millennium and will be a major a
rea of advancement in lanthanide inorganic, organometallic, and coordinatio
n chemistry. This paper previews some possibilities in this held. (C) 2000
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