Synthesis and Structure of a Dinuclear Gold(II) Complex with Terminal Fluoride Ligands

2011 ◽  
Vol 50 (10) ◽  
pp. 4238-4240 ◽  
Author(s):  
Doris Y. Melgarejo ◽  
Gina M. Chiarella ◽  
John P. Fackler ◽  
Lisa M. Perez ◽  
Alexandre Rodrigue-Witchel ◽  
...  
Keyword(s):  
Fluoride Ligands

scholarly journals Decomposition of d- and f-Shell Contributions to Uranium Bonding from the Quantum Theory of Atoms in Molecules: Application to Uranium and Uranyl Halides

Inorganics ◽  
2018 ◽  
Vol 6 (3) ◽  
pp. 88 ◽  
Author(s):  
Jonathan Tanti ◽  
Meghan Lincoln ◽  
Andy Kerridge
Keyword(s):  
Quantum Theory ◽  
Electronic Structures ◽  
Density Functional ◽  
Covalent Bond ◽  
Vibrational Frequencies ◽  
Atoms In Molecules ◽  
High Symmetry ◽  
Strong Correlations ◽  
Bond Stability ◽  
Fluoride Ligands

The electronic structures of a series of uranium hexahalide and uranyl tetrahalide complexes were simulated at the density functional theoretical (DFT) level. The resulting electronic structures were analyzed using a novel application of the Quantum Theory of Atoms in Molecules (QTAIM) by exploiting the high symmetry of the complexes to determine 5f- and 6d-shell contributions to bonding via symmetry arguments. This analysis revealed fluoride ligation to result in strong bonds with a significant covalent character while ligation by chloride and bromide species resulted in more ionic interactions with little differentiation between the ligands. Fluoride ligands were also found to be most capable of perturbing an existing electronic structure. 5f contributions to overlap-driven covalency were found to be larger than 6d contributions for all interactions in all complexes studied while degeneracy-driven covalent contributions showed significantly greater variation. σ-contributions to degeneracy-driven covalency were found to be consistently larger than those of individual π-components while the total π-contribution was, in some cases, larger. Strong correlations were found between overlap-driven covalent bond contributions, U–O vibrational frequencies, and energetic stability, which indicates that overlap-driven covalency leads to bond stabilization in these complexes and that uranyl vibrational frequencies can be used to quantitatively probe equatorial bond covalency. For uranium hexahalides, degeneracy-driven covalency was found to anti-correlate with bond stability.

Chromium chains as polydentate fluoride ligands for lanthanides

2011 ◽  
Vol 47 (22) ◽  
pp. 6251 ◽  
Author(s):  
Andrew McRobbie ◽  
Asad R. Sarwar ◽  
Steven Yeninas ◽  
Harriott Nowell ◽  
Michael L. Baker ◽  
...  
Keyword(s):  
Fluoride Ligands

Metallacyclic Zinc Complexes of Alkylidene-Linked Bitopic Bis(pyrazolyl)methane Ligands:  Unusual Exocyclic Bridging Fluoride Ligands

2007 ◽  
Vol 7 (6) ◽  
pp. 1163-1170 ◽  
Author(s):  
Daniel L. Reger ◽  
Russell P. Watson ◽  
Mark D. Smith ◽  
Perry J. Pellechia
Keyword(s):  
Zinc Complexes ◽  
Fluoride Ligands

Notizen: Die Kristallstruktur von [(CH3)4N]FeF4 · H2O mit einem di(µ-fluoro)-verbrückten [Fe2F8(H2O)2]2–-Anion / Crystal Structure of [(CH3)4N]FeF4 · H2O with a Di(μ-fluoro)-Bridged [Fe2F8(H2O)2]2- Anion

1991 ◽  
Vol 46 (3) ◽  
pp. 395-399 ◽  
Author(s):  
Ursula Bentrup ◽  
Werner Massa
Keyword(s):  
Crystal Structure ◽  
Single Crystals ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
Dimeric Unit ◽  
Fluoride Ligands

Single crystals of [(CH3)4N]FeF4·H2O have been prepared from aqueous HF solution. The crystal structure was determined by X-ray diffraction: space group P1̄, Z = 2 (or 1 dimeric unit), a = 705.7(5), b = 818.5(8), c = 915.2(12) pm, α = 65.46(10)°, β = 82.90(9)°, γ = 72.76(7)°, R/wR = 0.047/0.021. The structure consists of centrosymmetrical dimeric anions [Fe2F8(H2O)2]2- with fluorine double bridges and is isotypic with [(CH3)4N]VOF3 · H2O. Intramolecular H-bonds are found between the axial water and fluoride ligands. By additional strong intermolecular H-bonds (O ··· F 258 pm) the anions are connected to form infinite parallel chains between which the TMA cations are located. [(CH3)4N]AlF4 · H2O is shown to be isotypic.

scholarly journals Crystal structure of a dinuclear CoIIcomplex with bridging fluoride ligands: di-μ-fluorido-bis{tris[(6-methylpyridin-2-yl)methyl]amine}dicobalt(II) bis(tetrafluoridoborate)

2014 ◽  
Vol 70 (11) ◽  
pp. m359-m360 ◽  
Author(s):  
Masataka Inomata ◽  
Yusaku Suenaga
Keyword(s):  
Crystal Structure ◽  
Complex Cation ◽  
Three Dimensional ◽  
High Spin State ◽  
Octahedral Geometry ◽  
Distorted Octahedral Geometry ◽  
Methyl Amine ◽  
Dimensional Network ◽  
Distorted Octahedral ◽  
Fluoride Ligands

Reaction of Co(BF4)2·6H2O with tris[(6-methylpyridin-2-yl)methyl]amiine in methanol results in a fluoride abstraction from BF4−, yielding the unexpected title compound, [Co2F2(C21H24N4)2](BF4)2. The complex cation consists of two inversion-related [Co(C21H24N4)]2+moieties bridged by a pair of fluoride ligands. The CoIIcation is six-coordinated in a distorted octahedral geometry and forms a +II high-spin state. In the crystal, the complex cation and the BF4−anion are connected by C—H...F hydrogen bonds, forming a three-dimensional network. An intramolecular C—H...F hydrogen bond is also observed.

Sulfur-substituted uranyl stabilized by fluoride ligands: matrix preparation of U(O)(S)F2via oxidation of U(0) by SOF2

2020 ◽  
Vol 56 (50) ◽  
pp. 6782-6785
Author(s):  
Rui Wei ◽  
Xiuting Chen ◽  
Yu Gong
Keyword(s):  
Uranyl Complex ◽  
Fluoride Ligands ◽  
Matrix Preparation

A neutral sulfur-substituted uranyl complex [U(O)(S)F2] in which the SUO2+ moiety is stabilized by electron withdrawing fluoride ligands was prepared via oxidation of U(0) by SOF2 in cryogenic matrixes.

scholarly journals Self-complementary nickel halides enable multifaceted comparisons of intermolecular halogen bonds: fluoride ligands vs. other halides

2018 ◽  
Vol 9 (15) ◽  
pp. 3767-3781 ◽  
Author(s):  
Vargini Thangavadivale ◽  
Pedro M. Aguiar ◽  
Naseralla A. Jasim ◽  
Sarah J. Pike ◽  
Dan A. Smith ◽  
...  
Keyword(s):  
Halogen Bond ◽  
Mas Nmr ◽  
Halogen Bonds ◽  
Nmr Spectrum ◽  
Fluoride Ligands

Studies of X–Ni–C6F4I⋯X–Ni–C6F4I halogen-bonded networks reveal pronounced differences between fluoride (X = F) and other halides: the 19F-MAS NMR spectrum is a sensitive probe of the halogen bond.

scholarly journals Solid State Structure of Bis[(bromo)(dicyclopentadienyl)vanadium(μ2-fluoro)][(bromo)(cyclopentadienyl)vanadium][tetrafluoroborate]

2015 ◽  
Vol 2015 ◽  
pp. 1-4
Author(s):  
Lisa M. Chan ◽  
Atta M. Arif ◽  
Richard D. Ernst
Keyword(s):  
Solid State ◽  
Coordination Sphere ◽  
Mixed Valence ◽  
Monoclinic Space Group ◽  
State Structure ◽  
Cyclopentadienyl Ligands ◽  
Cyclopentadienyl Ligand ◽  
Mixed Valence Compound ◽  
Fluoride Ligands ◽  
Ferrocenium Cation

The new complex [V(C5H5)2Br]2(μ2-F)2[V(C5H5)Br]+[BF4]− has been isolated from the reaction of vanadocene monobromide with the ferrocenium cation. The complex is a mixed valence compound composed of two V(IV) and one V(III) centers. The V(III) center has one cyclopentadienyl ligand in its coordination sphere, as well as a bromide and two fluoride ligands. Each fluoride ligand is also attached to one of the V(IV) centers, which additionally is coordinated by a bromide and two cyclopentadienyl ligands. The complex crystallizes in the monoclinic space group P21/m, with a=7.66490(10) Å, b=15.2457(2) Å, c=13.3185(2) Å, and β=101.2721(8)° at 150(1) K.

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