Synthesis, Structure, and Thermal Decomposition of the Dysprosium Cationic Complex with Ferrocene Phosphine Oxide and Tricarbonyliron Sorbate Ligands

The 3d–4f heterometallic complex [Dy((η4-sba)Fe(CO)3)2(DppfO2)2]Cl·8EtOH·H2O (Hsba is sorbic acid CH3(CH=CH)2CO2H; DppfO2 is Fe(η5-C5H4P(O)Ph2)2) is obtained by the interaction of DyCl3·6H2O, sorbic acid iron, tricarbonyland 1,1′-bis-(diphenylphosphinoxido)ferrocene in the presence of triethylamine in the organic medium and is structurally characterized. Its structure is composed of complex cations in which the Dy3+ ion is chelated by four organoiron ligands of two types [(η4-sba)Fe(CO)3]– and DppfO2, with two chiral carboxylatex ligands being present in each cation as one enantiomer. The structure also contains centrosymmetric associates {Cl·H2O·8EtOH}2 formed by hydrogen bonds. Themolysis of the complex is analyzed by thermal gravimetry and differential scanning calorimetry and is found to yield a mixture of FePO4, DyPO4, and Dy2O3.