Preparation, characterization and electrochemical studies of 1,1′-bis(diphenylphosphino) ferrocene (dppf) derivatives. Crystal structure of [dppfCo(NO)2][SbF6]

Heterobimetallic compounds [Ru(η5-Cp)(dppf)X] (X = Cl, Br, I and N3): synthesis, electrochemical analysis, and the crystal structure of [Ru(η5-Cp)(dppf)I] [dppf = 1,1′-bis(diphenylphosphino)ferrocene]

“…The coordination influence on the quadrupole splitting is more evident. The values now range from 2.30 to 2.38 mm s -1 , falling on the two sides with respect to the free ligand dppf (D = 2.33 mm s -1 ) [21][22][23][24][25], but in any case remaining lower than the ferrocene value (D = 2.42 mm s -1 ) [26]. This behavior is consistent with the fact that the phosphino groups affect the p electron system of the ring without any significant disturbance of the electron flux; this influence is maximized by the coplanarity of the rings with the phosphorus atoms [27], but as a consequence, the molecular symmetry of the complexes around the iron center is strongly distorted.…”

1,1′-Bis(diphenylphosphino)ferrocene bridging two mono(cyclopentadienyl) cobalt moieties: Synthesis, structure, electrochemistry and DFT studies

“…The two oxidation processes that occur at 0.38 and 0.95 V are assigned to the oxidations of Co(I) to Co(II) and Co(II) to Co(III), respectively, whereas the reversible oxidation at the further positive domain (ca 1.23 V) is due to the oxidation of dppf ligand. When compared with the potential value reported for the behaviour of free dppf in solution [6,37], it is clear that the redox conversion of the dppf ligand in complex 2 requires higher overpotentials (about 0.44 V).…”

Synthesis and Characterization of {Ni(NO)}10 and {Co(NO)2}10 Complexes Supported by Thiolate Ligands

“…[60][61][62][63][64][65][66] Presumably, the asymmetric and symmetric ν NO modes for 5 are nearly 100 cm -1 lower than the average values observed with other {Co(NO) 2 } 10 complexes because the previously reported complexes of this configuration have been overall charge neutral or cationic. Complex 5 represents the first example of a {Co(NO) 2 } 10 species contained within an anion.…”