Four members o
f the electron-trans
fer series [Fe(NO)(S
2C
2R
2)
2]
z (
z = 1+, 0, 1-, 2-) have been isolated as solidmaterials (R =
p-tolyl): [
1a](BF
4), [
1a]
0, [Co(Cp)
2][
1a], and [Co(Cp)
2]
2[
1a]. In addition, complexes [
2a]
0 (R = 4,4-diphenyl), [
3a]
0 (R =
p-methoxyphenyl), [Et
4N][
4a] (R = phenyl), and [PPh
4][
5a] (R = -CN) have been synthesizedand the members o
f each o
f their electron-trans
fer series electrochemically generated in CH
2Cl
2 solution. All specieshave been characterized electro- and magnetochemically. Their electronic, Mössbauer, and electron paramagneticresonance spectra as well as their in
frared spectra have been recorded in order to elucidate the electronic structureo
f each member o
f the electron-trans
fer series. It is shown that the monocationic, neutral, and monoanionic speciespossess an {FeNO}
6 (
S = 0) moiety where the redox chemistry is sul
fur ligand-based, (L)
2-(L
f">)
1-: [Fe(NO)(L
f">)
2]
+(
S = 0), [Fe(NO)(L
f">)(L)]
0 f"> [Fe(NO)(L)(L
f">)]
0 (
S = 1/2), [Fe(NO)(L)
2]
- (
S = 0). Further one-electron reductiongenerates a dianion with an {FeNO}
7 (
S = 1/2) unit and two
fully reduced, diamagnetic dianions L
2-: [Fe(NO)(L)
2]
2-(
S = 1/2).