Synthesis and Electrochemical Behavior of Metal Carbonyl Isocyanoferrocene Compounds [M(CO)6‐n(C≡NFc)n] (M=Cr, Mo, W; n=1, 2, 3)
The synthesis of [M(CO)6‐n(C≡NFc)n] (n=1: M=Cr, 3 a; M=Mo, 3 b; M=W, 3 c. n=2: M=Mo, 5. n=3: M=Mo, 6. Fc=Fe(η5−C5H4)(η5−C5H5)) by the reaction of [M(CO)5(thf)] (M=Cr, 1 a; M=Mo, 1 b; M=W 1 c) (synthesis of 3 a–c), [Mo(CO)4(nbd)] (4) (synthesis of 5) or [Mo(CO)6] (synthesis of 6) with FcN≡C (2) is di...
Saved in:
Published in | Zeitschrift für anorganische und allgemeine Chemie (1950) Vol. 648; no. 17 |
---|---|
Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Weinheim
Wiley Subscription Services, Inc
13.09.2022
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | The synthesis of [M(CO)6‐n(C≡NFc)n] (n=1: M=Cr, 3 a; M=Mo, 3 b; M=W, 3 c. n=2: M=Mo, 5. n=3: M=Mo, 6. Fc=Fe(η5−C5H4)(η5−C5H5)) by the reaction of [M(CO)5(thf)] (M=Cr, 1 a; M=Mo, 1 b; M=W 1 c) (synthesis of 3 a–c), [Mo(CO)4(nbd)] (4) (synthesis of 5) or [Mo(CO)6] (synthesis of 6) with FcN≡C (2) is discussed. IR studies confirm the formation of cis‐[Mo(CO)4(C≡NFc)2] (5) and mer‐[Mo(CO)3(C≡NFc)3] (6). The electrochemical behavior of 2, 3 a–c, 5 and 6 is reported. Compound 2 shows a reversible Fc redox event at E°1′=355 mV (ΔEp=60 mV). Upon complexation of 2 to M(CO)5 this wave is slightly shifted to E°′=335 (3 a), 345 (3 b) and 340 mV (3 c) showing that in 3 a–c the FcN≡C ligand is more easy to oxidize. The substitution of further CO ligands in 3 b by FcN≡C as characteristic for 5 and 6 influences the respective redox events insignificantly. Reversible oxidation of Cr occurs at 1045 mV (3 a) (ΔEp=60 mV), while for 3 b,c (3 b: 1170 mV, 3 c: 1290 mV) irreversible oxidations were observed. In addition, in situ spectroelectrochemical IR studies were carried out on 3 a–c. The results were further confirmed by DFT calculations. |
---|---|
ISSN: | 0044-2313 1521-3749 |
DOI: | 10.1002/zaac.202100371 |