The cis-octahedral structure of the diacidobis(ethylenediamine)nickel compound Nien2NCSCl and Nien2NCSBr

1965 ◽  
Vol 6 (1) ◽  
pp. 157-158
Author(s):  
A. E. Shvelashvili ◽  
M. A. Porai-Koshits ◽  
A. S. Antsyshkina
Keyword(s):  
Nickel Compound ◽  
Octahedral Structure

scholarly journals Preparation and Spectral Study of New Complexes of Some Metal Ions with 3,5-Dimethyl-1H-Pyrazol-1-yl Phenyl Methanone

2011 ◽  
Vol 8 (4) ◽  
pp. 1005-1011
Author(s):  
Baghdad Science Journal
Keyword(s):  
Magnetic Susceptibility ◽  
Elemental Analysis ◽  
Room Temperature ◽  
Molar Conductivity ◽  
The Other ◽  
Octahedral Structure ◽  
Tetrahedral Structure ◽  
Visible Spectra ◽  
Ft Ir ◽  
Uv Visible

Many complexes of 3,5-dimethyl-1H-pyrazol-1-yl phenyl methanone with Cr(III), Co(II), Ni(II), Cu(II) and Cd(II) were synthesized and characterized by FT-IR, UV/visible spectra, elemental analysis, room temperature magnetic susceptibility and molar conductivity. Cd(II) complex was expected to have tetrahedral structure while all the other complexes were expected to have an octahedral structure.

scholarly journals Crystal structure of a nickel compound comprising two nickel(II) complexes with different ligand environments: [Ni(tren)(H2O)2][Ni(H2O)6](SO4)2

2020 ◽  
Vol 76 (3) ◽  
pp. 314-317
Author(s):  
Karilys González Nieves ◽  
Dalice M. Piñero Cruz
Keyword(s):  
Crystal Structure ◽  
Title Compound ◽  
Molar Ratio ◽  
Water Molecules ◽  
Nickel Compound ◽  
Counter Anion ◽  
Cationic Complex ◽  
Coordinated Water ◽  
Co Precipitation ◽  
Metal Ligand

The title compound, diaqua[tris(2-aminoethyl)amine]nickel(II) hexaaquanickel(II) bis(sulfate), [Ni(C6H18N4)(H2O)2][Ni(H2O)6](SO4)2 or [Ni(tren)(H2O)2][Ni(H2O)6](SO4)2, consists of two octahedral nickel complexes within the same unit cell. These metal complexes are formed from the reaction of [Ni(H2O)6](SO4) and the ligand tris(2-aminoethyl)amine (tren). The crystals of the title compound are purple, different from those of the starting complex [Ni(H2O)6](SO4), which are turquoise. The reaction was performed both in a 1:1 and 1:2 metal–ligand molar ratio, always yielding the co-precipitation of the two types of crystals. The asymmetric unit of the title compound, which crystallizes in the space group Pnma, consists of two half NiII complexes and a sulfate counter-anion. The mononuclear cationic complex [Ni(tren)(H2O)2]2+ comprises an Ni ion, the tren ligand and two water molecules, while the mononuclear complex [Ni(H2O)6]2+ consists of another Ni ion surrounded by six coordinated water molecules. The [Ni(tren)(H2O)2] and [Ni(H2O)6] subunits are connected to the SO4 2− counter-anions through hydrogen bonding, thus consolidating the crystal structure.

Two modifications of the diacidobis(ethylenediamine)nickel compound Nien2NO2NCS

1965 ◽  
Vol 6 (1) ◽  
pp. 155-156 ◽  
Author(s):  
A. E. Shvelashvili ◽  
M. A. Porai-Koshits ◽  
A. S. Antsyshkina
Keyword(s):  
Nickel Compound

Structure of the Short-Lived Intermediate Formed during the Metal Substitution Reaction of the Mercury(II) Porphyrin Complex with Cobalt(II) Ion in Aqueous Solution Determined by the Stopped-Flow EXAFS Method

1998 ◽  
Vol 53 (4) ◽  
pp. 469-475 ◽  
Author(s):  
Kazuhiko Ozutsumi ◽  
Shintaro Ohnishia ◽  
Hitoshi Ohtaki ◽  
Masaaki Tabatab
Keyword(s):  
Bond Length ◽  
Local Structure ◽  
Substitution Reaction ◽  
Stopped Flow ◽  
Coordination Geometry ◽  
Metal Substitution ◽  
Octahedral Structure ◽  
Coordinate Structure ◽  
Bond Lengths ◽  
Additional Water

The local structure around the cobalt(II) ion in the reaction intermediate formed during the metal substitution reaction of the homodinuclear mercury(II) porphyrin (5,10,15,20-tetrakis(4- sulfonatophenyl)porphyrin; H2tpps4- ) complex with a cobalt(II) ion in an acetate buffer has been determined by the stopped-flow EXAFS method. The structure of the reactant and the product of the above reaction has also been determined by the same method. The coordination geometry around the cobalt(II) ion in the heterodinuclear intermediate, [Hg(tpps)Coll]2- , is six-coordinate octahedral with four additional water and/or acetate oxygen atoms. The Coll-N and Coll-O bond lengths in the intermediate are 212(2) and 221(1) pm, respectively. The product, [Coll(tpps)]4-, has a six-coordinate octahedral structure, the Coll-N and Coll-O bond lengths being 203(1) and 215(1) pm, respectively. The Coll-N bond length in the intermediate is ca. 9 pm longer than that in the product. The Coll-O bond length in the intermediate is also ca. 9 pm longer than that of 212(1) pm in the reactant, the cobalt(II) acetato complex, and ca. 6 pm longer than that in the product. The longer Coll-O bond in the intermediate as compared to those in the reactant and in the product appears to be responsible for the instability of the intermediate. The oxidized product, [Colll(tpps)]3-, has a six-coordinate structure with two additional Colll-O bonds. The Colll-N and Colll-O bond lengths are 189(1) and 197(2) pm, respectively, and are much shorter than those in [Coll(tpps)]4-.

Potassium Bis(2-[α-Hydroxyalkyl/Aryl] Benzimidazolato) Dioxovanadates(V) through Base Assisted Aerial Oxidation of the Corresponding Oxovanadium(IV) Complexes

2002 ◽  
Vol 2002 (6) ◽  
pp. 260-261 ◽  
Author(s):  
Mannar R. Maurya ◽  
Shilpa Khurana
Keyword(s):  
Thermogravimetric Analysis ◽  
Spectral Studies ◽  
Potassium Salts ◽  
Octahedral Structure ◽  
H Nmr ◽  
Aerial Oxidation

Bis(2-[α-hydroxyalkyl/aryl]benzimidazolato)dioxovanadates(V) dihydrates, as their potassium salts, were prepared by the reaction of [VO(acac)2] with the respective benzimidazole followed by aerial oxidation in presence of KOH. An octahedral structure has been proposed for these complexes on the basis of IR, electronic and 1H NMR spectral studies, and thermogravimetric analysis.

Mononuclear and Binuclear Complexes of Platinum(0) Containing (Alkynyl)phenylsilanes

1999 ◽  
Vol 52 (1) ◽  
pp. 51 ◽  
Author(s):  
Martin A. Bennett ◽  
Christopher J. Cobley ◽  
David C. R. Hockless ◽  
Thomas Klettke
Keyword(s):  
Spectroscopic Data ◽  
Chair Conformation ◽  
Membered Ring ◽  
Binuclear Complexes ◽  
Nickel Compound ◽  
X Ray ◽  
X Ray Crystallography

Reaction of bis(cycloocta-1,5-diene)platinum(0) with the (alkynyl)phenylsilanes Ph3SiC2But, Ph2Si(C2But)2 and PhSi(C2But)3 gives, respectively, [Pt (Ph3SiC2But)2] (1b), [Pt {Ph2Si(C2But)}]2 (2b), and [Pt {PhSi(C2But)3}]2 (4b), which contain zerovalent platinum atoms coordinated by two alkyne units. Spectroscopic data indicate that (2b) and (4b) contain two PtC4 and two SiC4 tetrahedra joined at the corners. X-Ray crystallography shows that complex (4b) is isostructural and isomorphous with the known nickel analogue, two of the alkyne units being uncoordinated; the central eight-membered ring comprising two silicon, four alkyne carbon and two platinum atoms has an approximate chair conformation. In contrast, the monomer (1b) is isostructural but not isomorphous with the analogous nickel compound (1a); in the crystal there is evidence for a weak intramolecular phenyl-phenyl interaction.

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