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- W2031667173 abstract "Abstract Iron(II) complexes, (Et 4 N) 2 [Fe(Z cys AlaAla cys OMe) 2 ] ( 1 ) and (Et 4 N) 2 [Fe(Z cys AlaPro cys OMe) 2 ] ( 2 ), were synthesized by reaction of the corresponding SH-free peptides with (Et 4 N) 2 [Fe(StBu) 4 ]. 1 and 2 give redox potentials at −0.49 and −0.58 V versus SCE in acetonitrile, respectively. The negatively shifted redox potential observed in 2 was explained by the lower contribution of NHS hydrogen bonds. In the 2 H NMR spectra of 1 and 2 using N-deuterated cysteine peptide ligands, [Fe(Z cys (1)AlaPro cys (2)OMe) 2 ] 2− ( 2 ) exhibits isotropically shifted N 2 H signals at 24.5 and 22.8 ppm in acetonitrile at 30 °C which were assigned to N 2 H of the cys(2) residue due to the formation of a Cys(2)-N 2 HS-Cys(1) hydrogen bond while [Fe(Z cys (1)Ala(1)Ala(2) cys (2)OMe) 2 ] 2− ( 1 ) gives signals at 33.3, 29.2 and −3.6 ppm due to the hydrogen bonds of Cys(2)-N 2 H SCys(1) and Ala(2)N 2 HSCys(1), respectively." @default.
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- W2031667173 date "1992-07-01" @default.
- W2031667173 modified "2023-09-27" @default.
- W2031667173 title "Spectral and electrochemical properties of an iron(II) complex of ZCysAlaProCysOMe and new synthesis of the corresponding ZCysAlaAlaCysOMe analogue" @default.
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- W2031667173 doi "https://doi.org/10.1016/s0020-1693(00)85518-8" @default.
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