Abstract
195Pt, 1H, and 13C NMR spectroscopy was used to study the structure of binuclear platinum(III) acetamidate complexes with 1,10-phenanthroline and 2,2′-bipyridine ligands [Pt2(phen)2(acam)4](NO3)2 (1) and [Pt2(bipy)2(acam)4](NO3)2 (2) in aqueous solutions. The 195Pt NMR spectra of solutions of complexes 1 and 2 in D2O exhibit two signals with satellites due to the 195Pt–195Pt spin-spin coupling (1 J(Pt–Pt) ≈ 6345 Hz), whereas their 1H and 13C NMR spectra contain four sets of signals for the protons and the carbon atoms of the heterocyclic and acetamidate ligands. The signals were assigned using the COSY, NOESY, and HSQC/ HMBC experiments and comparing the coordination shifts of the signals for the protons of heterocycles. These data allowed us to draw a conclusion that binuclear complexes 1 and 2 in solution have a head-to-head structure with nonequivalent platinum(III) atoms (coordination cores PtN5 and PtN3O2), the axial-equatorial coordination of the bidentate heterocyclic molecules, and two bridging and two terminal acetamidate ligands.
Similar content being viewed by others
References
T. G. Appleton, J. R. Hall, D. W. Neale, S. F. Ralph, Inorg. Chim. Acta, 1983, 77, L149.
J. J. Wilson, S. J. Lippard, Inorg. Chem., 2012, 51, 9852.
A. Santoro, M. Wegrzyn, A. C. Whitwood, B. Donnio, D. W. Bruce, J. Am. Chem. Soc., 2010, 132, 1068.
C. Pacifico, F. P. Intini, F. Nushi, G. Natile, Bioinorg. Chem. Appl., 2010, ID 102863.
S. Iwatsuki, E. Isomura, A. Wada, K. Ishihara, K. Matsumoto, Eur. J. Inorg. Chem., 2006, 2484.
T. V. L. Maresca, E. Mesto, C. Pacifico, G. Natile, Eur. J. Inorg. Chem., 2006, 163.
K. Ito, R. Somazawa, J. Matsunami, K. Matsumoto, Inorg. Chim. Acta, 2002, 339, 292.
V. M. Dijinovic, M. Galanski, V. B. Arion, B. K. Keppler, Dalton Trans., 2010, 39, 3633.
N. A. Bokach, M. R. Tyan, G. G. Aleksandrov, M. Haukka, V. Yu. Kukushkin, Inorg. Chem. Commun., 2009, 12, 1061.
I. Ara, J. Fornies, C. Fortuno, S. Ibanez, A. Martin, P. Mastrorilli, V. Gallo, Inorg. Chem., 2008, 47, 9069.
M. Ghassemsadeh, M. M. Heravi, B. Neumuller, Z. Anorg. Allg. Chem., 2005, 631, 2401.
A. Rodriquez, M. J. Romero, A. Fernandez, M. LopezTorres, D. Vasquez-Garcia, L. Naya, J. M. Vila, J. J. Fernandez, Polyhedron, 2014, 67, 160.
C. Bellitto, M. Bonamico, G. Dessy, V. Fares, A. Flamini, J. Chem. Soc., Dalton Trans., 1986, 595.
G. Natile, F. P. Intini, C. Pacifico, in Cisplatin: Chemistry and Biochemistry of a Leading Anticancer Drug, Ed. B. Lippert, Wiley-WCH, Weinheim, 1999, p. 429.
J. K. Barton, H. N. Rabinovich, D. J. Szalda, S. J. Lippard, J. Am. Chem. Soc., 1977, 99, 2827.
J. P. Davidson, P. J. Faber, R. G. Fischer, S. Mansy, H. J. Peresie, B. Rosenberg, L. VanCamp, Cancer Chemother. Rep., 1975, 59, 287.
T. Yamaguchi, O. Kubota, T. Ito, Chem. Lett., 2004, 33, 190.
G. Bandoli, A. Dolmella, F. P. Intini, C. Pacifico, G. Natile, Inorg. Chim. Acta, 2003, 346, 143.
T. N. Fedotova, L. Kh. Minacheva, G. N. Kuznetsova, Russ. J. Inorg. Chem. (Engl. Transl.), 2003, 48, 351 [Zh. Neorg. Khim., 2003, 48, 417].
T. N. Fedotova, Zh. V. Dobrokhotova, P. S. Koroteev, G. N. Kuznetsova, G. G. Aleksandrov, V. K. Ivanov, E. F. Zharikova, I. L. Eremenko, Russ. Chem. Bull. (Int. Ed.), 2012, 61, 230 [Izv. Akad. Nauk, Ser. Khim., 2012, 230].
T. N. Fedotova, G. G. Aleksandrov, Zh. V. Dobrokhotova, G. N. Kuznetsova, I. L. Eremenko, Russ. J. Inorg. Chem. (Engl. Transl.), 2013, 58, 777 [Zh. Neorg. Khim., 2013, 58, 879].
P. S. Pregosin, Coord. Chem. Rev., 1982, 44, 247.
T. V. ÓHalloran, M. M. Roberts, S. J. Lippard, Inorg. Chem., 1986, 25, 957.
L. Pazderski, E. Szlyk, J. Sitkowski, B. Kamienski, L. Kozerskii, J. Tousek, R. Marek, Magn. Reson. Chem., 2006, 44, 163.
L. Pazderski, J. Tousek, J. Sitkowski, L. Kozerskii, R. Marek, E. Szlyk, Magn. Reson. Chem., 2007, 45, 24.
Author information
Authors and Affiliations
Corresponding author
Additional information
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 10, pp. 2408–2414, October, 2015.
Rights and permissions
About this article
Cite this article
Kirakosyan, G.A., Fedotova, T.N. & Kuznetsova, G.N. Structure of binuclear platinum(III) acetamidate complexes in solutions as probed by 195Pt, 13C, and 1H NMR spectroscopy. Russ Chem Bull 64, 2408–2414 (2015). https://doi.org/10.1007/s11172-015-1170-5
Received:
Revised:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11172-015-1170-5