Syntheses, crystal structures, and characterization of heteronuclear complexes based on a versatile ligand with both acetylacetonate and bis(2-pyridyl) units

A new type of multidentate ligand with both acetylacetonate and bis(2-pyridyl) units on the 1,3-dithiole moiety, 3-[2-(dipyridin-2-yl-methylene)-5-methylsulfanyl-[1,3]dithiol-4-ylsulfanyl]-pentane-2, 4-dione (L), has been prepared. Through reactions of the ligand with Re(CO)5X (X = Cl, Br), new rhenium(I) tricarbonyl complexes ClRe(CO)3(L) (2) and BrRe(CO)3(L) (3), have been obtained. With the use of 2 or 3 as the precursors, the further reactions with (TpPh2)Co(OAc)(HpzPh2) (TpPh2 = hydrotris(3,5-diphenylpyrazol-1-yl)borate); HpzPh2 = 3,5-diphenyl-pyrazole) or M(OAc)2 (M = Mn, Zn), afford four new heteronuclear complexes: ClRe(CO)3(L)Co(TpPh2) (4), BrRe(CO)3(L)Co(TpPh2) (5), [ClRe(CO)3(L)]2Mn(CH3OH)2 (6) and [ClRe(CO)3(L)]2Zn(CH3OH)2 (7), respectively. Crystal structures of complexes 2 and 4–7 have been determined by X-ray diffraction. Their absorption spectra, photoluminescence and magnetic properties have been studied.