Group 2 β-diketonate complexes stabilized by O and N donor ligands; crystal structure of [Ca(PhCOCHCOPh)2(pmdeta)] (pmdeta = N,N,N′,N′N″-pentamethyldiethylenetriamine)

Abstract The calcium(II) β-diketonate complexes [Ca(dppd) 2 (EtOH) 0.5 ] n ·C 7 H 8 ( 1 ) and [Ca(dppd) 2 (H-dppd)] ( 2 ) have been synthesized from the reactions of [Ca(OEt) 2 (EtOH) 4 ] n with 2 and 3 molar equiv. of H-dppd (H-dppd = 1,3-diphenylpropane-1,3-dione), respectively. The reaction of the tetra-ethanol solvated calcium ethoxide with 2 and 1 moalr equiiv. of H-dppd and pmdeta [Me 2 NCH 2 CH 2 N(Me)CH 2 CH 2 NMe 2 ], respectively, gave [Ca(dppd) 2 (pmdeta)] ( 3 ). A single crystal X-ray structural study of complex 3 has shown it be monomeric. The reactionof [Sr(OEt) 2 (EtOH) 4 ] n with 3 molar equiv. of H-tmhd (H-tmhd = 2,2,6,6-tetramethylheptane-3,5-dione) also yielded [Sr(tmhd) 2 (H-tmhd)] ( 4 ).