Synthesis and electrochemical aspects of group 14 iron complexes of the type (η5-C5H5)Fe(L)2ER3, L2= (CO)2, (Ph2P)2CH2; E = C, Si, Ge, Sn

Synthesis and Cyclic Voltammetric Studies of the Diiron Complexes ER2[(η5-C5H4)Fe(L2)Me]2(E = C, Si, Ge, Sn; R = H, alkyl; L2= diphosphine) and (η5-C5H5)Fe(L2)ER2Fc (Fc = (η5-C5H4)Fe(η5-C5H5))

“…The X-ray structure determination of the monoiron analog, (η 5 -C 5 H 5 )Fe(dppm)SiMe 3 ( 9 ) (see reference 11 for the synthesis of 9 ) was also performed in order to compare the variations in structural pattern of Fe-Si/Fe-P bond distances and PFe-P bite angles (Figure 4, Tables 2, 3). The differences between the structures of 6b and 9 are associated with the Fe-Si/Fe-P bond distances and P-Fe-P bite angles.…”

“…THF and hexanes were freshly distilled from sodium benzophenone ketyl immediately prior to use; CH 2 [CpFe(CO) 2 Me] 2 ( 1 )13b and SiMe 2 [(η 5 -C 5 H 4 )Fe(CO) 2 Me] 2 ( 2 ) were synthesized by following the procedure reported for SiMe 2 [(η 5 -C 5 H 4 )Fe(CO)2 2 SiMe 2 SiMe 3 ] 2 13. GeMe 2 [(η 5 -C 5 H 4 )Fe(CO) 2 Me] 2 ( 3 )14, SnMe 2 [(η 5 -C 5 H 4 )Fe(CO) 2 Me] 2 4 14, (η 5 -C 5 H 5 Fe(CO) 2 SiMe 2 Fc ( 6 ) and (η 5 -C 5 H 5 )Fe(dppm)SiMe 3 ( 9 )11 were prepared according to literature method. FcSn t Bu 2 Cl was prepared following the procedure reported for FcSiMe 2 Cl 26.…”

Anionic Iron Complexes with a Bond between an Ate-Type Pentacoordinated Germanium and an Iron Atom

“…CV of 3b exhibited irreversible oxidation waves at the peak potential of the anodic current of +0.31 V versus Ag + /Ag in THF. This was much lower than that of LFe(Cp)(CO) 2 (ranging from +1.335 to +1.421 V), where L is Me, SiMe 3 , and GeMe 3 , representing the easily oxidizable characteristics of the anionic complex . In fact, oxidation of 3b with silver perchlorate gave 1 quantitatively.…”

“…This was much lower than that of LFe(Cp)(CO) 2 (ranging from +1.335 to +1.421 V), where L is Me, SiMe 3 , and GeMe 3 , representing the easily oxidizable characteristics of the anionic complex. 23 In fact, oxidation of 3b with silver perchlorate gave 1 quantitatively. The oxidation corresponds to withdrawal of an electron from the σ-bonding orbital, and thus it leads to Ge−Fe bond fission.…”

Indirect detection of the 183W and 57Fe nuclei using 119Sn‐relayed 1H,X correlation spectroscopy

“…Compounds 1 and 2 (Scheme ) were prepared as previously described 14, 23. All NMR spectra were recorded on a Bruker DRX 400 Avance Spectrometer ( 1 H: 400 MHz, π/2 = 10 µs; 119 Sn: 149 MHz, π/2 = 10 µs; 183 W: 16.6 MHz, π/2 = 45 µs; 57 Fe: 12.9 MHz, π/2 = 56 µs) with three radiofrequency channels for acquisition.…”