Synthesis and structural characterization of the beta-diketonate aryloxide dimer [Ca-2(tmhd)(4)(OArN)(4)(EtOH)(2)] (where H-tmhd=2,2,6,6-tetramethylheptane-3,5-dione; H-OArN=2,6-N,N-dimethylaminomethyl-4-methylphenol)

The in situ reaction of the oligomeric Group 2 metal ethoxide complex [Ca(OEt)(2) (EtOH)(4)](n) with 1 equiv. of 2,2,6,6-tetramethylheptane-3,5-dione (H-tmhd) and 2,6-N,N-dimethylaminomethyl-4-methylphenol (H-OArN) yielded the ethanol-adducted beta-diketonate aryloxide compound [Ca-2(tmhd)(4)(OArN)(4)(EtOH)(2)] (1). If, during the reaction workup, reduced pressures and high temperatures are applied, then the ethanol free derivative [Ca(tmhd)(1.5)(OArN)(0.5)](n) (2) is isolated. Complex 1 was shown by single crystal studies to be dimeric, with the calcium ions seven-coordinate and held together by bridging OArN ligands. Copyright (C) 1996 Elsevier Science Ltd.