The electronic spectra of coordinated nitrite ion: correlation between spectra and structure

1980 ◽  
Vol 58 (8) ◽  
pp. 823-832 ◽  
Author(s):  
Ian M. Walker ◽  
A. B. P. Lever ◽  
Paul J. McCarthy
Keyword(s):  
Fine Structure ◽  
Metal Ions ◽  
Single Crystals ◽  
Electronic Spectrum ◽  
Electronic Spectra ◽  
Electronic Transition ◽  
Structure Elucidation ◽  
Nickel Complexes ◽  
Nitrite Ion ◽  
Oxygen Atoms

The characteristic electronic spectrum of the nitrite ion survives when the ion is bonded to metal ions through the oxygen atoms. The vibrational fine structure associated with the n → π* electronic transition in the near uv region has been examined at 10 K in single crystals of K3[Hg(O2N)4](NO3) and in a series of nickel complexes with N-alkylated ethylenediamines. When either non-coordinated, monodentate oxygen coordinating, or bidentate chelating through oxygen, nitrite ion in the crystals shows vibronic features which depend on nitrite environment. It is suggested that the electronic spectra of the nitrite ion may constitute a useful tool in structure elucidation.

Structural and spectroscopic studies of transition metal nitrite complexes. III. Crystal structures and spectra of Aquabis(meso-1,2-diphenylethane-1,2-diamine)-nitronickel(II) perchlorate and Bis(meso-1,2-diphenylethane-1,2-diamine)-(nitrito-O,O')nickel(II) chloride

1981 ◽  
Vol 34 (10) ◽  
pp. 2069 ◽  
Author(s):  
AJ Finney ◽  
MA Hitchman ◽  
CL Raston ◽  
GL Rowbottom ◽  
AH White
Keyword(s):  
Fine Structure ◽  
Water Molecule ◽  
Single Crystals ◽  
Electronic Spectra ◽  
Spectroscopic Studies ◽  
Molecular Structures ◽  
Nitrite Ion ◽  
Nickel Ion ◽  
Crystal And Molecular Structures ◽  
Coordinated Water

The crystal and molecular structures of the complexes [Ni(mstien),(NO2)(H2O)] ClO4 and [Ni(mstien)2(O2N)] Cl are reported (mstien = meso-stilbenediamine, 1,2-diphenylethane-1,2-di-amine). Both compounds contain nickel(II) in an essentially octahedral ligand environment. In the latter complex, the nitrite ion chelates, while in the former it is present as a nitro group situated trans to a coordinated water molecule. In both complexes the conformations observed for the amine chelate rings can be rationalized on the basis that they minimize intramolecular ligand repulsions. The complex [Ni(mstien)2(O2N)] NO2 is isomorphous with the analogous chloride compound, and spectral evidence suggests that the complex [Ni(mstien)2(O2N)] ClO4 also contains a chelating nitrite group. The electronic spectra of single crystals of [Ni(mstien),(O2N)] X (X = Cl- and NO2-) show bands centred at c. 25000 cm-l which exhibit vibrational fine structure. The energies of the progressional spacings are c.600cm-l, which suggests that the bands are probably due to n → π* internal nitrite transitions. The band centred at c. 20500 cm-1 in [Ni(mstien)2(NO2)(H2O)] ClO4 also shows well resolved vibrational fine structure with a progressional spacing of c. 630 cm-1. This implies that the band is not due to a 'd-d' transition, but must be caused by the excitation of an electron into the nitrite π* orbital, either from a non-bonding nitrite orbital, or more probably from the nickel ion.

scholarly journals Coordinating Properties of the Fluorosulfate Ion. Tetrakis(pyridine) Complexes of Zinc(II), Copper(II), and Nickel(II) Fluorosulfates

1974 ◽  
Vol 52 (18) ◽  
pp. 3218-3228 ◽  
Author(s):  
Carl S. Alleyne ◽  
Robert C. Thompson
Keyword(s):  
Electrical Conductivity ◽  
Magnetic Susceptibility ◽  
Metal Ions ◽  
Electronic Properties ◽  
Infrared Spectra ◽  
Copper Complex ◽  
Electronic Spectra ◽  
Nickel Complexes ◽  
Ionic Dissociation ◽  
Distorted Octahedral

Complexes of the type M(py)4(SO3F)2 (py = pyridine, M = Ni, Cu, Zn) have been prepared and characterized. Infrared spectra of all three complexes, electronic spectra and magnetic susceptibility studies of the copper and nickel complexes, and e.p.r. studies of the copper complex are reported. The complexes have tetragonally distorted octahedral structures with fluorosulfate groups coordinated to metal ions as unidentate ligands. To facilitate comparison of the coordinating action of the fluorosulfate ion with other polyatomic anions the complexes, Cu(py)4X2 (X = ClO4−, BF4−, NO3−, p-CH3C6H4SO3−, CF3CO2−) have been prepared and their electronic properties examined. The studies indicate that the coordinating strength of SO3F− towards metals is greater than ClO4−, BF4−, and NO3− but less than p-CH3C6H4SO3− and CF3CO2−. Electrical conductivity studies on solutions in acetonitrile indicate a correlation between the relative coordinating strength of the anion in a given complex and the extent to which the complex undergoes ionic dissociation in this solvent.

The Gold Sulfates MAu(S04)2 (M = Na, K, Rb)

2001 ◽  
Vol 56 (12) ◽  
pp. 1340-1343 ◽  
Author(s):  
Mathias S. Wickleder ◽  
Oliver Büchner
Keyword(s):  
Sulfuric Acid ◽  
Single Crystals ◽  
Crystal Structures ◽  
Structural Features ◽  
Monovalent Cations ◽  
Coordination Numbers ◽  
Square Planar ◽  
Oxygen Atoms

AbstractThe evaporation of a solution of Au(OH)3 and Na2So4 in conc. sulfuric acid led to yellow single crystals of NaAu(SO4)2 (monoclinic, P21/n, Z = 2, a = 469.1, b = 845.9, c = 831.2 pm, β = 95.7°). Analogous procedures with K2SO4 or Rb2SO4 instead of Na2SO4 yielded single crystals of KAu(SO4)2 (monoclinic, C2/c, Z = 4, a = 1109.8, b = 724.2, c = 941.1 pm, β = 118.4°) and RbAu(S04)2, respectively, (triclinic, P1̄, Z = 1, a = 423.6, b = 497.5, c = 889.0 pm, a = 76.4°, β = 88.4°, γ = 73.5°). Although the crystal structures of the three sulfates are not isotypic they show similar structural features: The gold atoms are coordinated by four oxygen atoms in a square planar manner. These oxygen atoms belong to four SO42- ions which link the [AUO4] units to infinite chains according to 1∞[Au(SO4)4/ 2]- . These chains are connected via the monovalent cations which show coordination numbers of 6 (Na+), 10 (K+) and 12 (Rb+), respectively.

scholarly journals Band‐Edge Exciton Fine Structure and Exciton Recombination Dynamics in Single Crystals of Layered Hybrid Perovskites

2019 ◽  
Vol 30 (6) ◽  
pp. 1907979 ◽  
Author(s):  
Hong‐Hua Fang ◽  
Jie Yang ◽  
Sampson Adjokatse ◽  
Eelco Tekelenburg ◽  
Machteld E. Kamminga ◽  
...  
Keyword(s):  
Fine Structure ◽  
Single Crystals ◽  
Band Edge ◽  
Exciton Recombination ◽  
Recombination Dynamics

scholarly journals Synthesis characterization of Cr(III), Fe(III), Co(II), Ni(II), Cu(II) and Zn(II) complexes of 2,12-dimethyl-3-13-di-n-propyl-l,4,ll,14-tetraazacycloeicosa-1,13,l1,13-tetraene

2002 ◽  
Vol 67 (12) ◽  
pp. 825-832 ◽  
Author(s):  
Raghu Prasad ◽  
Mala Mathur
Keyword(s):  
Metal Ions ◽  
Metal Complexes ◽  
Electronic Spectra ◽  
Magnetic Measurements ◽  
Elemental Analyses

Metal complexes of a 20-membered tetraazamacrocycle 2,12-dimethyl-3,13-di-n-propyl 1,4,11,14-tetraazacycloeicosa-1,3,11,13-tetraene(L) of the type [MLX2]X(M=Cr(III), Fe(III); X=NO3)[CoLNO3]NO3, [NiL(NO3)2], [CuL]Cl2 and [ZnLCl2]have been prepared by 2+2 cyclocondensation of 2,3-hexanedione with 1,6-diaminohexane in the presence of metal ions as templates. These complexes were characterized by elemental analyses, conductances, IR and electronic spectra and magnetic measurements.

scholarly journals The Layered Structure of Cu2(H2O)4[C4H4N2][C6H2(COO)4]·2H2O

2019 ◽  
Author(s):  
Roberto Köferstein
Keyword(s):  
Nitrogen Atom ◽  
Single Crystals ◽  
Silica Gel ◽  
Layered Structure ◽  
Water Molecules ◽  
Two Dimensional ◽  
Space Group ◽  
Distorted Octahedral ◽  
Oxygen Atoms

Triclinic single crystals of Cu2(H2O)4[C4H4N2][C6H2(COO)4]·2H2O have been grown in anaqueous silica gel. Space group P-1 (Nr. 2), a = 723.94(7) pm, b = 813.38(14) pm, c = 931.0(2) pm, α = 74.24(2)°, β = 79.24(2)°, γ = 65.451(10)°, V = 0.47819(14) nm3, Z = 1. Cu2+ is coordinated in a distorted, octahedral manner by two water molecules, three oxygen atoms ofthe pyromellitate anions and one nitrogen atom of pyrazine (Cu—O 194.1(2)–229.3(3) pm;Cu–N 202.0(2) pm). The connection of Cu2+ and [C6H2(COO)4)]4− yields infinite strands,which are linked by pyrazine molecules to form a two-dimensional coordination polymer.Thermogravimetric analysis in air showed that the dehydrated compound was stable between175 and 248 °C. Further heating yielded CuO.

Komplexe mit substituierten 2,5-Dihydroxy-p-benzochinonen: EA[C6(NO2)2O4] · H2O (EA = Ca, Sr)/ Complexes with Substituted 2,5-D ihydroxy-p-benzoquinones: EA [C6(NO2)2O4] · 4H2O(EA = Ca, Sr)

1987 ◽  
Vol 42 (8) ◽  
pp. 972-976 ◽  
Author(s):  
Christian Robl
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Water Molecule ◽  
Single Crystals ◽  
Coordination Sphere ◽  
Trigonal Prism ◽  
Water Molecules ◽  
Additional Water ◽  
Oxygen Atoms

AbstractSingle crystals of EA[Q(NO2)2O4] · 4H2O (EA = Ca. Sr) were grown in aqueous silicagel. Ca2+ has CN 8. It is surrounded by 4 oxygen atoms of two bis-chelating [C6(NO2)2O4]2- ions and 4 water molecules, which form a distorted, bi-capped trigonal prism. Sr2+ is coordinated similarly, with an additional water molecule joining the coordination sphere to yield CN 8+1. Corrugated chains extending along [010] and consisting of EA2+ and nitranilate ions are the main feature of the crystal structure. Adjacent chains are interlinked by hydrogen bonds.

Depth profiling of dopant concentration and pyroelectric properties of LiNbO3 single crystals treated at high-temperature in the presence of metal ions

2019 ◽  
Vol 539 (1) ◽  
pp. 146-152 ◽  
Author(s):  
G. Suchaneck ◽  
U. V. Yakhnevych ◽  
A. Eydam ◽  
D. Yu. Sugak ◽  
I. I. Syvorotka ◽  
...  
Keyword(s):  
High Temperature ◽  
Metal Ions ◽  
Single Crystals ◽  
Dopant Concentration ◽  
Depth Profiling ◽  
Pyroelectric Properties

Trimeric uranyl(vi)–citrate forms Na+, Ca2+, and La3+ sandwich complexes in aqueous solution

2020 ◽  
Vol 56 (86) ◽  
pp. 13133-13136
Author(s):  
Jerome Kretzschmar ◽  
Satoru Tsushima ◽  
Björn Drobot ◽  
Robin Steudtner ◽  
Katja Schmeide ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Metal Ions ◽  
Sandwich Complexes ◽  
Oxygen Atoms

Under the uranyl citrate umbrella: metal ions are extremely shielded from water upon coordination by six uranyl(vi) oxygen atoms.

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