Synthesis and characterization of bis(4,4,4-trifluoro-1-(2-thienyl)-1,3-butanedionato) strontium and barium adducts with O– and N– ancillary ligands; crystal structure of Sr(tftb)2(batcp)

Complexes of type [M(tftb)2Ln] [M=Sr; n=1, L=tetraglyme (4), 2,3-benzo-10-aza-1,4,7,13-tetraoxacyclopentadeca-2-ene (batcp) (5), n=2, L=2,2′-bipyridine-N,N′ (bipy) (6); M=Ba; n=1, L=tetraglyme (7), 2,3-benzo-10-aza-1,4,7,13-tetraoxacyclopentadeca-2-ene (batcp) (8); n=2, L=2,2′-bipyridine-N,N′ (bipy) (9)] were prepared by in situ reactions of 4,4,4-trifluoro-1-(2-thienyl)-1,3-butanedione (Htftb) (1) with M(OH)2 [M=Sr (2a); Ba (2b)] in the presence of the ancillary ligands L (3a: L=tetraglyme; 3b: L=2,3-benzo-10-aza-1,4,7,13-tetraoxacyclopentadeca-2-ene (batcp); 3c: L=2,2′-bipyridine-N,N′ (bipy)) in aqueous ethanol. The compounds were obtained in high yields and characterized by elemental analysis, 1H NMR, mass spectrometry and IR analysis. Molecular structure of the [Sr(tftb)2(batcp)] (5) has been determined by X-ray single crystal analysis.