The synthesis and characterisation of 1′-ethynyl-2,5-dimethylazaferrocene and derivatives

The synthesis and electrochemical behavior of 1,4-di-(2,5-dimethylazaferrocenyl)-1,3-butadiyne

“…After the first scan the electrode surface is covered with a thin pale yellow film. Such behaviour has been observed previously in azaferrocene derivatives [22,23]. Based only on the DE ox values (Table 1) we can partially estimate electronic communication between the two iron centers in 4 as 0.475 V (for 2 V/s scan rate).…”

“…Microanalyses were carried out by Mr. S Boyer at SACS (Scientific Analysis and Consultancy Services) at the University of North London. 1 0 -Ethynyl-2,5-dimethylazaferrocene was prepared according to the literature method [22]. All other chemicals were purchased from the Aldrich Chemical Co.…”

“…In the course of our study, recently, we synthesized and characterized 1 0 -ethynyl-2,5-dimethylazaferrocene (3) (Fig. 1) [22]. In this note we present application of 3 in the synthesis of the title compound 4 (Fig.…”

“…Synthesis of azaferrocene compound 4 was justified by searching for new metallocene complexes with possible metal-metal interactions. It is worth underlining that the electrochemistry of azaferrocene derivatives has long lagged behind that of ferrocene but has begun to be more established over last few years [22][23][24]. Cyclic voltammetric studies of 4 performed at various temperatures and potential sweep rates are reported here.…”

The synthesis, structures, and electrochemistry of 1′-heteroaryl-2,5-dimethylazaferrocenes

“…In case of ferrocene, p-methoxystyryl substitution effects a 60 mV cathodic shift of the Fc/Fc + couple whereas the analogous shift for azaferrocene is 380 mV [20]. Interestingly, however, introduction of the ethynyl groups to ferrocene and to 2,5-dimethylazaferrocene brings about the same anodic shift of approximately 160 mV [21].…”