scholarly journals TTFs nonsymmetrically fused with alkylthiophenic moieties

2015 ◽  
Vol 11 ◽  
pp. 628-637 ◽  
Author(s):  
Rafaela A L Silva ◽  
Bruno J C Vieira ◽  
Marta M Andrade ◽  
Isabel C Santos ◽  
Sandra Rabaça ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Charge Transfer ◽  
Single Crystal ◽  
Electrochemical Properties ◽  
X Ray ◽  
Oxidation Processes ◽  
Ligand Precursors ◽  
A Charge

Two new dithiolene ligand precursors, containing fused TTF and alkyl thiophenic moieties 3,3'-{[2-(5-(tert-butyl)thieno[2,3-d][1,3]dithiol-2-ylidene)-1,3-dithiole-4,5-diyl]bis[sulfanediyl]}dipropanenitrile (α-tbtdt, 1), and 3,3'-{[2-(5-methylthieno[2,3-d][1,3]dithiol-2-ylidene)-1,3-dithiole-4,5-diyl]bis[sulfanediyl]}dipropanenitrile (α-mtdt, 2), were synthesized and characterized. The electrochemical properties of these electronic donors were studied by cyclic voltammetry (CV) in dichloromethane. Both compounds show two quasi-reversible oxidation processes, versus Ag/AgCl, typical of TTF donors at E 1 1/2 = 279 V and E 2 1/2 = 680 V for 1 and E 1 1/2 = 304 V and E 2 1/2 = 716 V in the case of 2. The single-crystal X-ray structure of 1 and of a charge transfer salt of 2, (α-mtdt)[Au(mnt)2] (3), are reported.

scholarly journals Tuning π-Acceptor/σ-Donor Ratio of the 2-Isocyanoazulene Ligand: Non-Fluorinated Rival of Pentafluorophenyl Isocyanide and Trifluorovinyl Isocyanide Discovered

Molecules ◽  
2021 ◽  
Vol 26 (4) ◽  
pp. 981
Author(s):  
Mason D. Hart ◽  
John J. Meyers ◽  
Zachary A. Wood ◽  
Toshinori Nakakita ◽  
Jason C. Applegate ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Coordination Chemistry ◽  
Single Crystal ◽  
13C Nmr ◽  
Quantitative Assessment ◽  
X Ray ◽  
New Class ◽  
Linear Relationships ◽  
Ligand Charge Transfer ◽  
Donor Characteristics

Isocyanoazulenes (CNAz) constitute a relatively new class of isocyanoarenes that offers rich structural and electronic diversification of the organic isocyanide ligand platform. This article considers a series of 2-isocyano-1,3-X2-azulene ligands (X = H, Me, CO2Et, Br, and CN) and the corresponding zero-valent complexes thereof, [(OC)5Cr(2-isocyano-1,3-X2-azulene)]. Air- and thermally stable, X-ray structurally characterized 2-isocyano-1,3-dimethylazulene may be viewed as a non-benzenoid aromatic congener of 2,6-dimethyphenyl isocyanide (2,6-xylyl isocyanide), a longtime “workhorse” aryl isocyanide ligand in coordination chemistry. Single crystal X-ray crystallographic {Cr–CNAz bond distances}, cyclic voltametric {E1/2(Cr0/1+)}, 13C NMR {δ(13CN), δ(13CO)}, UV-vis {dπ(Cr) → pπ*(CNAz) Metal-to-Ligand Charge Transfer}, and FTIR {νN≡C, νC≡O, kC≡O} analyses of the [(OC)5Cr(2-isocyano-1,3-X2-azulene)] complexes provided a multifaceted, quantitative assessment of the π-acceptor/σ-donor characteristics of the above five 2-isocyanoazulenes. In particular, the following inverse linear relationships were documented: δ(13COtrans) vs. δ(13CN), δ(13COcis) vs. δ(13CN), and δ(13COtrans) vs. kC≡O,trans force constant. Remarkably, the net electron withdrawing capability of the 2-isocyano-1,3-dicyanoazulene ligand rivals those of perfluorinated isocyanides CNC6F5 and CNC2F3.

X-ray diffuse scattering as precursor of incommensurate Peierls transitions in one-dimensional organic charge transfer conductors

2004 ◽  
Vol 219 (11) ◽  
Author(s):  
Jean-Paul Pouget
Keyword(s):  
Charge Transfer ◽  
Charge Density Wave ◽  
Diffuse Scattering ◽  
Lattice Distortion ◽  
Density Wave ◽  
Periodic Lattice ◽  
One Dimensional ◽  
X Ray ◽  
Charge Transfer Salts ◽  
A Charge

AbstractQuasi-one dimensional (1D) conductors of the TTF-TCNQ family of charge transfer salts exhibit a Peierls transition which stabilizes a periodic lattice distortion (PLD), accompanied by a charge density wave (CDW) modulation, with an incommensurate 2

Kinetics of electroreduction of Zn2+ at mercury in nonaqueous solutions

1994 ◽  
Vol 72 (7) ◽  
pp. 1691-1698 ◽  
Author(s):  
Mariléa Manzini ◽  
Andrzej Lasia
Keyword(s):  
Cyclic Voltammetry ◽  
Charge Transfer ◽  
Supporting Electrolyte ◽  
Donor Number ◽  
Nonaqueous Solutions ◽  
Dc Polarography ◽  
One Step ◽  
A Charge ◽  
Tetraethylammonium Perchlorate ◽  
Kinetics Of

The electroreduction of Zn2+ was studied in propylene carbonate (PC), acetonitrile (ACN), and hexamethylphosphoramide (HMPA) on mercury at various concentrations of tetraethylammonium perchlorate as a supporting electrolyte using dc polarography, cyclic voltammetry, chronoamperometry, and ac polarography. It was found that in PC and ACN the electroreduction process proceeds in one step. In HMPA, however, the electroreduction proceeds through a CEE mechanism in which a chemical reaction is followed by a charge transfer in two steps. The heterogeneous rate constants, corrected for the double layer effects, decrease with increase in the solvent donor number. The electroreduction process proceeds through the cation transfer mechanism.

meso-Aryl substituted free-base tripyrrins: preparation and electrochemically induced protonation/deprotonation reactions. Single crystal X-ray analysis of (2,6-diFPh)2TriPyH

RSC Advances ◽  
2015 ◽  
Vol 5 (117) ◽  
pp. 96769-96776 ◽  
Author(s):  
Ru Feng ◽  
Zhongping Ou ◽  
Zhaoli Xue ◽  
Yuanyuan Fang ◽  
Yang Song ◽  
...  
Keyword(s):  
Single Crystal ◽  
Electrochemical Properties ◽  
Free Base ◽  
Nonaqueous Media ◽  
X Ray

Three meso-substituted free-base tripyrrins were successfully isolated as side-products from the synthesis of triarylcorroles and characterized as to their electrochemical properties in nonaqueous media.

Crystal structures of some eriostyl/nitrobenzoate derivatives

1980 ◽  
Vol 33 (2) ◽  
pp. 313 ◽  
Author(s):  
PR Jefferies ◽  
BW Skelton ◽  
B Walter ◽  
AH White
Keyword(s):  
Charge Transfer ◽  
Solid State ◽  
Single Crystal ◽  
Crystal Structures ◽  
X Ray Diffraction ◽  
X Ray ◽  
Structure Determinations

Following the suggestion made earlier, on the basis of solution spectroscopy, that a number of eriostyl/nitrobenzoate compounds form charge-transfer self-complexes, a number of these have been investigated structurally by single-crystal X-ray diffraction methods in order to ascertain the presence or otherwise of such interactions in the solid state. The substances thus studied were eriostyl 3,5-dinitrobenzoate (1), eriostyl p-nitrobenzoate (2), tetrahydroeriostyl 3,5-dinitrobenzoate (3), and eriostemyl 3,5-dinitrobenzoate (4);* structure determinations in all cases, although displaying the presence of strong charge-transfer interactions from the two moieties of each molecule, show that the interactions in the solid state are intermolecular in nature.

1,2-Dicyanoferrocene: synthesis and characterization

2016 ◽  
Vol 94 (6) ◽  
pp. 547-551 ◽  
Author(s):  
Mohammad A. Abdulmalic ◽  
Steve W. Lehrich ◽  
Heinrich Lang ◽  
Tobias Rüffer
Keyword(s):  
Cyclic Voltammetry ◽  
Solid State ◽  
Single Crystal ◽  
Square Wave Voltammetry ◽  
Molecular Structures ◽  
Synthesis And Characterization ◽  
X Ray ◽  
Square Wave ◽  
Wave Voltammetry ◽  
Convenient Synthesis

A convenient synthesis of 1,2-dicyanoferrocene (3) was developed by using 2,4-dinitrofluorobenzene as a dehydrating agent for the treatment of 1,2-ferrocenedicarbaldehyde dioxime (2) to give 3 in yields exceeding 80%. Compounds 2 and 3 have been characterized by IR and NMR (1H, 13C{1H}) spectroscopy and by electrochemistry (cyclic voltammetry and square-wave voltammetry). Furthermore, the molecular structures of 2 and 3 in the solid state have been determined by single-crystal X-ray crystallographic studies.

Crystal structure and ferromagnetic behavior of a cis-Co(II) complex with nitronyl nitroxide

2000 ◽  
Vol 78 (3) ◽  
pp. 322-327
Author(s):  
Bai-Wang Sun ◽  
Qi-Hua Zhao ◽  
Dai-Zheng Liao ◽  
Zong-Hui Jiang ◽  
Shi-Ping Yan ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Magnetic Property ◽  
Charge Transfer ◽  
Key Words ◽  
Nitroxide Radical ◽  
Ferromagnetic Behavior ◽  
Nitronyl Nitroxide ◽  
X Ray ◽  
Ferromagnetic Exchange ◽  
A Charge

Bis(hexafluoroacetylacetonate)cobalt(II), Co(hfac)2, reacted with the nitronyl nitroxide radical 2-(4-methylphenyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide, NITPhMe, to yield an octahedral adduct of formula Co(hfac)2(NITPhMe)2. The X-ray crystal structure shows that it crystallizes in the space group P1, with a = 9.837(3), b = 11.618(3), c = 20.502(4) Å, α = 81.22(2), β = 87.93(2), γ = 72.24(3)º, V = 2205(1) Å3, Z = 2. The mechanism of ferromagnetic exchange between cobalt(II) and the radical can be qualitatively understood in terms of a charge-transfer interaction (J being 25.7 cm-1, the Hamiltonian is written in the form H = -2J(SRad1·SCo + SCo·SRad2)).Key words: crystal structure, cobalt(II) complex, nitronyl nitroxide, magnetic property.

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