Dihydrohexacyanoferrates of N-heterocyclic cations

Gorelsky, S. I.; Ilyukhin, A. B.; Kholin, P. V.; Kotov, Vitalii Yu.; Lokshin, B. V.; Sapoletova, N. A.

doi:10.1016/j.ica.2006.12.034

Cited by 24 publications

(17 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We The appearance of hydrocyanoferrates is scarce in the literature and in the presence of protonated nitrogen heterocycles only two examples exist. [22] There are three more such anions in crystal lattices with organic non-protonated cations. [31,32] At this point we can say that a few factors that govern the resulting solid state formulations between cyanoferrates and protonated nitrogen heterocycles are emerging from the present study.…”

Section: Discussionmentioning

confidence: 99%

“…Five Fe-C distances are very close spanning the range 1.909 -1.915 Å while the sixth (trans to Fe-CNH) is noticeably shorter. Previous findings suggest that both Fe-C and C≡N bonds are shorter in dihydrohexacyanoferrates [22] and in ferro- [23] and ferri- [24] cyanic acids. Our data are in agreement with the latter but oppose the former.…”

Section: (Bpeh2)(h3o)[fe(cn)5(cnh)]•h2o (3)mentioning

confidence: 99%

See 1 more Smart Citation

Supramolecular networks derived from hexacyanoferrates and nitrogen heterocyclic cations

et al. 2019

View full text Add to dashboard Cite

Eight novel supramolecular framworks (bpyH2)2[Fe(CN)6]•2H2O (1), (bpyH2)(H3O)[Fe(CN)6] (2), (bpeH2)(H3O)[Fe(CN)5(CNH)]•H2O (3), (bpeH2)(H5O2)[Fe(CN)6]•2H2O (4), (dabcoH2)(H3O)[Fe(CN)6]•2H2O (5), (ampyH2)2[Fe(CN)6]•2H2O (6), (tptzH3)2[Fe(CN)4(CNH)2]3•10H2O (7), and (tptzH3)[Fe(CN)6]•3H2O (8) (where bpy =4,4'bipyridine, bpe = 1,2-bis(4-pyridyl)ethylene, dabco = 1,4-diazabicyclo[2.2.2]octane, ampy = 4-aminomethylpyridine, tptz = tris(4-pyridyl)triazine) have been synthesized by the reaction of the nitrogen heterocycle with ferrocyanide or ferricyanide salts, under mild conditions. The supramolecular structures are constructed mainly by cooperative hydrogen bonding between the inorganic anions, the organic cations and oxoniums or lattice water molecules. There are some characteristic features that can separate the compounds in groups. Those are a) increase of H-bonding ability by formation of supramolecular complexes, b) formation of hydro-and dihydro-hexacyanoferrates and c) the participation of the cationic heterocycle as constituent of the structure or as a guest. The structures are additionally discussed in terms of topology.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: (Bpeh2)(h3o)[fe(cn)5(cnh)]•h2o (3)mentioning

confidence: 99%

Supramolecular networks derived from hexacyanoferrates and nitrogen heterocyclic cations

et al. 2019

View full text Add to dashboard Cite

show abstract

“…The values of the interligand dihedral angles average 80° (from 77.7 to 84.4°) rather than the expected 90° Regarding the organic part of this hybrid structure, the corresponding bond distances and angles of the MQ moiety are listed in In ( (Table S3). 7,11 Although in a cationic N-rich aromatic heterocycle an interplanar distance of 3.0-3.22 Å (at 173 K) has been reported, 12 The single crystal X-ray structure analysis of (MQ)[CuBr 2 ] • show features that are consistent with the presence of Cu I and MQ I in the crystal. In the inorganic part, the distorted tetrahedral environment around the copper is in line with a four-coordinated Cu I , 4e,14 while Cu II would prefer a square planar geometry.…”

Section: Abstract a Novel 1d Hybrid Salt (Mq)[cubr 2 ] • (Mq= N-methmentioning

confidence: 97%

Approaching the limit of Cu^II/Cu^I mixed valency in a Cu^IBr₂–N-methylquinoxalinium hybrid compound

et al. 2015

View full text Add to dashboard Cite

show abstract

“…-Fe(CN) 4À 6 system. For example, it was demonstrated earlier [22] that the H-bond network plays an important role in stabilizing strongly acidic species such as pyridylpyridinium and dipyridinium cations and the H 2 Fe(CN) 2À 6 anion. On the other hand, no such network was observed in the salts of N-quaternized cations.…”

Section: Electrical Conductivitymentioning

confidence: 99%

Conductometric and UV–Visible Spectroscopic Studies on Association in Dilute Aqueous Solutions of Dq2Fe(CN)6

et al. 2015

Self Cite

View full text Add to dashboard Cite

Electrical conductivities and electronic absorption spectra of Dq 2 Fe(CN) 6 (where Dq 2? is diquat, the N,N 0 -ethylene-2,2 0 -bipyridine cation) were measured in dilute solutions in water. Experimental data were interpreted in terms of a molecular model which includes the presence of 1:1 and 2:1 associates. Initially, electrical conductivities and absorption spectra were treated using the Quint-Viallard conductivity equations and modified Hemmes algorithm in a limited concentration range, when only minor 2:1 complex formation is expected. The thermodynamic association constant of the 1:1 complex (K 1 = 17,800 ± 1800 dm 3 Ámol -1 ) and the corresponding contact distance (r min = 5.31 ± 0.07 Å ) were evaluated from the spectral data. Analysis of the conductivity data resulted in K 1 = 16,500 ± 1500 dm 3 Ámol -1 (r min = 5.38 ± 0.07 Å ). Both contact distances were found to agree with the FeÁÁÁN distances in crystalline DqH 2 Fe(CN) 6 Á4H 2 O and Dq 2 Fe(CN) 6 Á6H 2 O. This agreement allowed us to use the same r min value to estimate the association constant of the 2:1 complex in accordance to the Fuoss-Krauss theory. Both K 1 and K 2 were used to calculate electrical conductivities and optical absorbancies in the concentration range up to 5 mmolÁdm -3 . Satisfactory agreement was achieved between calculated and experimental data.

show abstract

Dihydrohexacyanoferrates of N-heterocyclic cations

Cited by 24 publications

References 26 publications

Supramolecular networks derived from hexacyanoferrates and nitrogen heterocyclic cations

Supramolecular networks derived from hexacyanoferrates and nitrogen heterocyclic cations

Approaching the limit of Cu^II/Cu^I mixed valency in a Cu^IBr₂–N-methylquinoxalinium hybrid compound

Conductometric and UV–Visible Spectroscopic Studies on Association in Dilute Aqueous Solutions of Dq2Fe(CN)6

Contact Info

Product

Resources

About

Dihydrohexacyanoferrates of N-heterocyclic cations

Cited by 24 publications

References 26 publications

Supramolecular networks derived from hexacyanoferrates and nitrogen heterocyclic cations

Supramolecular networks derived from hexacyanoferrates and nitrogen heterocyclic cations

Approaching the limit of CuII/CuI mixed valency in a CuIBr2–N-methylquinoxalinium hybrid compound

Conductometric and UV–Visible Spectroscopic Studies on Association in Dilute Aqueous Solutions of Dq2Fe(CN)6

Contact Info

Product

Resources

About

Approaching the limit of Cu^II/Cu^I mixed valency in a Cu^IBr₂–N-methylquinoxalinium hybrid compound