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Preparation and X-ray crystal structure (for Ln = Sm) of (�-phthalocyaninato)bis[di(2,2,6,6-tetramethylheptane-3,5-dionato)LnIII](Ln = Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Y)Sugimoto, Hiroshi; Higashi, Teruaki; Maeda, Atsushi; Mori, Masayasu; Masuda, Hideki; Taga, Tooru · Journal of the Chemical Society, Chemical Communications · 1983