Synthesis, reactivity, electrochemical and crystallographic studies of diferrocenoyl diselenide and ferrocenoyl selenides

Direct insertion of sulfur, selenium and tellurium atoms into metallaborane cages using chalcogen powders

“…The distance between two selenium atoms (Se1 and Se2 in Fig. 1) in 6 is 3.16 Å, much longer than an average Se-Se bond distance {2.29-2.39 Å} [55][56][57]. By analogy with 5-6, compounds 7 and 8 can be considered as 50-electron, electronically unsaturated dichalcometallaboranes where both the chalcogen atoms bound contiguously to one boron and two metal centers.…”

Structural aspects of some organoselenium compounds

“…Our group has studied the thiol peroxidase-like activities of a series of intramolecularly coordinated diorganodiselenides where the donor atom is nitrogen [1][2][3][4]. The diselenide (1) without any Se···N intramolecular interaction exhibits better thiol peroxidase-like activity compared to the diselenide (2), which has a strong Se···N interaction.…”

“…Organoselenenylsulfides have been proposed as intermediates in the catalytic cycle of glutathione peroxidase mimics [1][2][3][4][5][6][7]. Very few stable and structurally characterized selenenylsulfides are reported in literature.…”

Electrochemical and NMR spectroscopic studies of selenium- and tellurium-substituted ferrocenes II: Diferrocenyl chalcogenides, Fc2E, diferrocenyl dichalcogenides, Fc2E2, and bis(ferrocenylchalcogeno)alkanes, FcE(CH2)nE′Fc (E, E′=Se: n=1, 2, 3; E, E′=Te: n=1, 3; E=Se, E′=Te: n=3; Fc=[Fe(η5-C5H5)(η5-C5H4)])

“…This can be attributed to the electronegative selenium atom, which is bonded directly to the Cp ring, causing the oxidation to be more difficult than that of unsubstituted ferrocene [9,25]. The cyclic voltammogram (CV) of diferrocenyl selenide showed two clearly reversible one-electron oxidation processes, with E 1/2 values of 26 mV and 234 mV, indicating that the ferrocenyl moieties are not acting independently, DE = 208 mV.…”