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The synthesis of five half sandwich ruthenium(II) trichlorogermyl complexes of the type [(η6-Arene)Ru(PR3)Cl(GeCl3)] (PR3 = Phosphane and phosphite ligands; Arene = p-cymene or C6H5-OC2H4OH) is reported: [(η6-p-cymene)Ru(P(OMe)3)Cl(GeCl3)] (1), [(η6-p-cymene)Ru(P(OPh)3)Cl(GeCl3)] (2), [(η6-p-cymene)Ru(PPh3)Cl(GeCl3)] (3), [(η6-p-cymene)Ru(pta)Cl(GeCl3)] (pta = 1,3,5-triaza-7-phosphaadamantane) (4) and [(η6-C6H5-OC2H4OH)Ru(pta)Cl(GeCl3)] (5). The nature of the η6-arene and phosphane ligand was varied and the complexes have been prepared by facile insertion of GeCl2 (from GeCl2.(dioxane)) into the Ru-Cl bonds of the respective easily accessible precursor complexes [(η6-Arene)Ru(PR3)Cl2]. The complexes were fully spectroscopically characterized by 1H, 13C{1H} and 31P{1H} NMR spectroscopy, UV-Vis, ATR-IR, HRMS (ESI) and their thermal behavior elucidated by TGA. Their cytotoxicity to human ovarian carcinoma (A2780) and non-tumorigenic human embryonic kidney HEK293 cell lines is also reported, and represents the first cytotoxic investigations of Ru(II) germyl complexes to date. The first DFT studies (B3LYP; basis set 6-31+G(d,p) for H, C, O, P, Cl, N, and Ge atoms and DGDZVP for Ru atom) on trichlorogermyl ruthenium complexes were carried out on complex 2 and 5 in order to gain insights into the bonding situation between Ru and Ge and are reported.
Paul Joseph Dyson, Farzaneh Fadaei Tirani, Mouna Hadiji
Paul Joseph Dyson, Mouna Hadiji
Paul Joseph Dyson, Farzaneh Fadaei Tirani, Mouna Hadiji