摘要
Bi-nuclear neutral sulfur–nitrosyl iron complex [Fe<sub>2sub>(SR)<sub>2sub>(NO)<sub>4sub>] (<strong>Istrong>) has been obtained by replacement of thiosulfate ligands in dianion [Fe<sub>2sub>(S<sub>2sub>O<sub>3sub>)<sub>2sub>(NO)<sub>4sub>]<sup>2−sup> by 1-methyl-imidazole-2-yl. From X-ray analysis data, the complex has centrosymmetrical dimeric structure, with the iron atoms being linked via μ-N–C–S bridge. From Mossbauer spectroscopy, isomeric shift δ<sub>Fesub> is 0.180(1) mm/s and quadrupole splitting ΔE<sub>Qsub> is 0.928(2) mm/s at T = 290 K. By comparative studying the mass-spectra in the gaseous phase of solid samples decomposition and kinetics of NO release in 1%aqueous solutions of dimethylsulfoxide, using of the ligand with CH<sub>3sub> substituent in position 1 of imidazole-2-thiol was shown to yield a more stable donor of nitrogen monoxide than earlier obtained analog with imidazole-2-thiol, [Fe<sub>2sub>(C<sub>3sub>H<sub>3sub>N<sub>2sub>S)<sub>2sub>(NO)<sub>4sub>].