Ferrocenes and Other Sandwich Complexes of Iron

Evidence of extremely short hydrogen bond in the homoconjugated ferrocene-1,1′-diyl-bisphosphinic acid anion: sign change of the H/D isotope effect on the 31P NMR chemical shift

“…The 1 H, 2 , respectively). 1D pulse sequence with 301 pulse, acquisition time 2.62 s and relaxation delay 1-2 s was used to record 1 H NMR spectra as the sum of 400 scans.…”

“…Ferrocene derivatives continue to generate unabated research activity in organometallic chemistry 1,2 and neighboring disciplines such as bioorganometallic chemistry, [3][4][5] catalysis, [6][7][8][9] materials science [10][11][12][13][14][15] etc. In particular, recent advances in the studies of ferrocene-1,1 0 -diyl-bisphosphinic acids, Fc(P(R)OOH) 2 (see the schematic structure for RQCH 3 in Fig.…”

Ferrocene-Based Electrochemical Sensors for Cations

“…Such interactions encompass the iron centre and the cyclopentadienyl ring components [13]. Research by Yang et al shed light on this phenomenon via a comprehensive analysis of the molecular electrostatic potential (MEP) of Fc and its oxidised ferrocenium ion (Fc + or [Fe III (η 5 -C 5 H 5 ) 2 ] + ) counterpart [14]. The study elucidated the distribution of electrostatic charges, revealing remarkable insights into the solvation behaviour of Fc.…”

“…The landscape of molecular sensing and recognition has been redefined by the versatile synthetic chemistry of ferrocene (Fc), an organometallic compound that has emerged as a cornerstone in developing electrochemical molecular receptors for various cationic species [1][2][3][4][5]. The fascination with Fc in this context stems from its well-established synthetic routes and the accessibility of its redox couple, which confers it with exceptional utility for constructing molecular receptors.…”

Curious Case of Cobaltocenium Carbaldehyde

“…In the last couple of years, we have explored the chemistry of functionalized cobaltocenium salts 1 aiming at developing the rather neglected chemistry of cobaltocenium compounds further in comparison to the very well researched and studied ferrocene derivatives and materials. 2 Cobaltocenium salts are well worth to be investigated, due to their high chemical stability, fully reversible redox chemistry, high polarity with concomitant high solubility in polar solvents, and opposite electronic character (cationic charge, electron-withdrawing) to ferrocenes (neutral, electron-donating). To exploit these properties in more complex molecular compounds or materials, we need useful functionalized cobaltocenium synthons.…”