Novel Type of Tetranitrosyl Iron Salt: Synthesis, Structure and Antibacterial Activity of Complex [FeL’<sub>2</sub>(NO)<sub>2</sub>][FeL’L”(NO)<sub>2</sub>] with L’-thiobenzamide and L”-thiosulfate
Nataliya A. Sanina,
Arina A. Starostina,
Andrey N. Utenyshev,
Pavel V. Dorovatovskii,
Nina S. Emel’yanova,
Vladimir B. Krapivin,
Victor B. Luzhkov,
Viktoriya A. Mumyatova,
Anastasiya A. Balakina,
Alexei A. Terentiev,
Sergey M. Aldoshin
Affiliations
Nataliya A. Sanina
Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, RAS, 1, Acad. Semenov Av., 142432 Chernogolovka, Russia
Arina A. Starostina
Faculty of Fundamental Physical-Chemical Engineering, M.V. Lomonosov Moscow State University, 1/51 Leninskie Gory, 119991 Moscow, Russia
Andrey N. Utenyshev
Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, RAS, 1, Acad. Semenov Av., 142432 Chernogolovka, Russia
Pavel V. Dorovatovskii
National Research Centre “Kurchatov Institute”, 1 Acad. Kurchatov Square, 123182 Moscow, Russia
Nina S. Emel’yanova
Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, RAS, 1, Acad. Semenov Av., 142432 Chernogolovka, Russia
Vladimir B. Krapivin
Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, RAS, 1, Acad. Semenov Av., 142432 Chernogolovka, Russia
Victor B. Luzhkov
Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, RAS, 1, Acad. Semenov Av., 142432 Chernogolovka, Russia
Viktoriya A. Mumyatova
Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, RAS, 1, Acad. Semenov Av., 142432 Chernogolovka, Russia
Anastasiya A. Balakina
Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, RAS, 1, Acad. Semenov Av., 142432 Chernogolovka, Russia
Alexei A. Terentiev
Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, RAS, 1, Acad. Semenov Av., 142432 Chernogolovka, Russia
Sergey M. Aldoshin
Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry, RAS, 1, Acad. Semenov Av., 142432 Chernogolovka, Russia
In this work a new donor of nitric oxide (NO) with antibacterial properties, namely nitrosyl iron complex of [Fe(C6H5C-SNH2)2(NO)2][Fe(C6H5C-SNH2)(S2O3)(NO)2] composition (complex I), has been synthesized and studied. Complex I was produced by the reduction of the aqueous solution of [Fe2(S2O3)2(NO)2]2− dianion by the thiosulfate, with the further treatment of the mixture by the acidified alcohol solution of thiobenzamide. Based on the structural study of I (X-ray analysis, quantum chemical calculations by NBO and QTAIM methods in the frame of DFT), the data were obtained on the presence of the NO…NO interactions, which stabilize the DNIC dimer in the solid phase. The conformation properties, electronic structure and free energies of complex I hydration were studied using B3LYP functional and the set of 6–31 + G(d,p) basis functions. The effect of an aquatic surrounding was taken into account in the frame of a polarized continuous model (PCM). The NO-donating activity of complex I was studied by the amperometry method using an “amiNO-700” sensor electrode of the “inNO Nitric Oxide Measuring System”. The antibacterial activity of I was studied on gram-negative (Escherichia coli) and gram-positive (Micrococcus luteus) bacteria. Cytotoxicity was studied using Vero cells. Complex I was found to exhibit antibacterial activity comparable to that of antibiotics, and moderate toxicity to Vero cells.