Synthesis and metal-complexing ability of m-xylylenebis(β-diketones)
The preparation of the bis(β-diketone) XBAH2 (3,3′-[1,3-phenylenebis(methylene) bis(2,4-pentanedione)]) and five of its derivatives, and a study of their complexation reactions with Cu2+, is reported. Of these ligands (LH2), only sterically unhindered derivatives of acetylacetone readily yield binuclear copper(II) complexes, Cu2L2. The introduction of bulkier groups (Ph, t-Bu) into the 2,4-pentanedione portions of the ligands inhibits the complex-forming reaction, resulting in lower yields (XBBH2; see ligand abbreviations in Fig. 1), no reaction (XBPH2) or decomposition (XBDH2). The copper complex of Cl4XBAH2 appears to be polymeric; this is probably due to the steric effects of the bulky chlorine atom in the two-position. © 1989.
Publication Source (Journal or Book title)
Maverick, A., Martone, D., Bradbury, J., & Nelson, J. (1989). Synthesis and metal-complexing ability of m-xylylenebis(β-diketones). Polyhedron, 8 (12), 1549-1556. https://doi.org/10.1016/S0277-5387(00)80333-2