Skip to main content
. Author manuscript; available in PMC: 2018 Jan 31.
Published in final edited form as: Struct Bond. 2013 May 29;154:53–98. doi: 10.1007/430_2013_101

Table 2.

Electrochemical potentials for the family of Fe(NO)2(PR3)(TCNE) species vs FeCp2+/FeCp2 at scan rate of 100 mV/s and the pKa values for the phosphines and phosphite

Complexes Epc (V) Epa(P) (V) E° (ΔE) (V) pKa (Phosphine)
Fe(NO)2[P(OMe)3](η2-TCNE), 2 −0.990 −0.398 2.6
Fe(NO)2[PEt2Ph](η2-TCNE), 5 −1.120 −0.604 6.25
Fe(NO)2[PMe2Ph](η2-TCNE), 4 −1.123 −0.607 6.5
Fe(NO)2[P(n-Bu)3](η2-TCNE), 3 −1.146 −0.652 8.43
Fe(NO)2[P(OMe3)](CO), −1.96 (125 mV) 2.6
Fe(NO)2[PEt2Ph](CO) −2.108 (131 mV) 6.25
Fe(NO)2[PMe2Ph](CO) −2.101 (268 mV) 6.5
Fe(NO)2[P(n-Bu)3](CO) −2.150 (130 mV) 8.43