Sanchez-Perez, C; Knapp, CE; Karjalainen, MM; Oilunkaniemi, R; Carmalt, CJ; Laitinen, RS; (2018) Macrocycles containing 1,1'-ferrocenyldiselenolato ligands on group 4 metallocenes. Dalton Transactions , 47 (15) pp. 5415-5421. 10.1039/c8dt00300a.

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Abstract

Macrocyclic [Fe(η5-C5H4Se)2M(η5-C5H4R)2]2 [M = Ti (1), Zr (2), Hf (3), R = H; and M = Zr (4), Hf (5), R = tBu] were prepared and characterized by 77Se NMR spectroscopy and the crystal structures of 1-3 and 5 were determined by single-crystal X-ray diffraction. The crystal structure of 4 is known and the complex is isomorphous with 5. 1-5 form mutually similar macrocyclic tetranuclear complexes in which the alternating Fe(C5H4Se)2 and M(C5H4R)2 centers are linked by selenium bridges. The thermogravimetric analysis (TGA) of 1-3 under a helium atmosphere indicated that the complexes undergo a two-step decomposition upon heating. The final products were identified using powder X-ray diffraction as FexMSe2, indicating their potential as single-source precursors for functional materials.

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