Structure of the Linear-Chain Mixed Valence Compound Bis(l,3-diaminopropane)platinum(II)bis(l,3-diaminopropane)- diiodoplatinum(IV)tetraperchlorate

1984 ◽  
Vol 39 (2) ◽  
pp. 197-200 ◽  
Author(s):  
Mario Cannas ◽  
Giaime Marongiu ◽  
Heimo J. Keller ◽  
Barbara Müller ◽  
Reinhold Martin
Keyword(s):  
Structural Analysis ◽  
Crystal Structures ◽  
Satisfactory Agreement ◽  
Title Compound ◽  
Linear Chain ◽  
Mixed Valence ◽  
Space Groups ◽  
Compound C ◽  
Mixed Valence Compound

The title compound C12H49Cl4I2N8O 16Pt2, Mr 1314.1, is monoclinic P 21 (from structural analysis), a = 8.74(1), b = 11.36(1), c = 8.63(1), β = 107.6(5), V = 817 Å3, Z = 1, Dm (flotation) = 2.65 g cm-3, Dc = 2.66 g cm-3, MoKɑ λ = 0.71069, μ = 110.7 cm-1, R = 0.063 for 1068 observed reflections. Rotation photographs show diffuse patterns corresponding to odd values of k together with weak Bragg reflections. Refinement of diffractometer data was carried out in space groups Pm, P21/m and P21; both refinement in Pm and P21 give satisfactory agreement and lead to very similar crystal structures

Structure of a Pt(II)-Pt(IY) Mixed-Valence Linear Chain Complex: Bis (1,2-diaminopropane )platinum(II)bis (1,2-diaminepropane ) - dibromoplatinum(IV)tetraperchlorate

1983 ◽  
Vol 38 (11) ◽  
pp. 1346-1350 ◽  
Author(s):  
M. Cannas ◽  
G. Marongiu ◽  
R. Martin ◽  
H. J. Keller
Keyword(s):  
Structural Analysis ◽  
Collective Mode ◽  
Linear Chain ◽  
Mixed Valence ◽  
Chain Complex ◽  
Final Decision ◽  
One Dimensional ◽  
Space Groups ◽  
Cell Dimensions ◽  
Difference Fourier

[Pt(C3H10N2)2][Pt(C3H10N2)2Br2](ClO4)4 crystallizes as flat orthorhombic needles with cell dimensions: a = 7.74(1); b = 11.14(2); c = 19.42(3) Å, Z = 1. Since rotation photo­graphs showed diffuse patterns corresponding to odd values of k without any Bragg reflections, the subcell for which b = 5.57(1) Å was adopted for the structural analysis; it has systematic absences consistent with space groups Pc 2 a and Pcma; the structure was refined in both space groups by least squares and difference Fourier syntheses to R = 0.062 in Pc 2a and R = 0.064 in Pcma. A final decision between the two space groups proved to be impossible within the scope of the experiment. An analysis of the “diffuse” layers reveals that the bridging bromines vibrate in a one-dimensional collective mode within a lattice of “uniform”, fixed platinum cations.

A one-dimensional chloride-bridged PtII/PtIVmixed-valence complex with a 4-[(4-hydroxyphenyl)diazenyl]benzenesulfonate counter-ion

2015 ◽  
Vol 71 (12) ◽  
pp. 1033-1036 ◽  
Author(s):  
Nobuyuki Matsushita ◽  
Ayako Taira
Keyword(s):  
Valence State ◽  
Title Compound ◽  
Linear Chain ◽  
Mixed Valence ◽  
Chain Structure ◽  
Structural Parameter ◽  
One Dimensional ◽  
Square Planar ◽  
Cl Atoms ◽  
Linear Chain Structure

The title compound,catena-poly[[[bis(ethylenediamine-κ2N,N′)platinum(II)]- μ-chlorido-[bis(ethylenediamine)platinum(IV)]-μ-chlorido] tetrakis{4-[(4-hydroxyphenyl)diazenyl]benzenesulfonate} dihydrate], {[PtIIPtIVCl2(C2H8N2)4](HOC6H4N=NC6H4SO3)4·2H2O}n, has a linear chain structure composed of square-planar [Pt(en)2]2+(en is ethylenediamine) and elongated octahedraltrans-[PtCl2(en)2]2+cations stacked alternately, bridged by Cl atoms, along thebaxis. The Pt atoms are located on an inversion centre, while the Cl atoms are disordered over two sites and form a zigzag ...Cl—PtIV—Cl...PtII... chain, with a PtIV—Cl bond length of 2.3140 (14) Å, an interatomic PtII...Cl distance of 3.5969 (15) Å and a PtIV—Cl...PtIIangle of 170.66 (6)°. The structural parameter indicating the mixed-valence state of the Pt atom, expressed by δ = (PtIV—Cl)/(PtII...Cl), is 0.643.

Die neuen Oxobismutate(III) Cs6Bi4O9, K9Bi5O13 und A2Bi4O7 (A = Rb, Cs) / The New Oxobismutates(III) Cs6Bi4O9, K9Bi5O13 and A2Bi4O7 (A = Rb, Cs)

2002 ◽  
Vol 57 (10) ◽  
pp. 1090-1100
Author(s):  
Franziska Emmerling ◽  
Caroline Röhr
Keyword(s):  
Single Crystal ◽  
Crystal Structures ◽  
Alkali Metals ◽  
Mixed Valence ◽  
Three Dimensional ◽  
X Ray Diffraction ◽  
X Ray ◽  
Trigonal Bipyramidal ◽  
Mixed Valence Compound

AbstractThe title compounds were synthesized at a temperature of 700 °C via oxidation of elemental Bi with the hyperoxides AO2 or via reaction of the elemental alkali metals A with Bi2O3. Their crystal structures have been determined by single crystal x-ray diffraction. They are dominated by two possible surroundings of Bi by O, the ψ-trigonal-bipyramidal three (B) and the ψ-tetrahedral four (T) coordination. Cs6Bi4O9 (triclinic, spacegroup P1̄, a = 813.82(12), b = 991.60(14), c = 1213.83(18) pm, α = 103.658(2), β = 93.694(3), γ = 91.662(3)°, Z = 2) contains centrosymmetric chain segmentes [Bi8O18]12- with six three- (T) and two four-coordinated (B) Bi(III) centers. K9Bi5O13 (monoclinic, spacegroup P21/c, a = 1510.98(14), b = 567.59(5), c = 2685.6(2) pm, β = 111.190(2)°, Z = 4) is a mixed valence compound with isolated [BivO4]3- tetrahedra and chains [BiIII4O9]6- of two T and two B coordinated Bi. In the compounds A2Bi4O7 (A = Rb/Cs: monoclinic, C2/c, a = 2037.0(3) / 2130.6(12), b = 1285.5(2) / 1301.9(7), c = 1566.6(2) / 1605.6(9) pm, β = 94.783(3) / 95.725(9)°, Z = 8) ribbons [Bi4O6O2/2]2- are formed, which are condensed to form a three-dimensional framework.

Pt(NH3)2(SCN)2J: Ein Platinkomplex mit gemischter Wertigkeit / Pt(NH3)2(SCN)2I: A Mixed Valence Platinum Compound

1976 ◽  
Vol 31 (2) ◽  
pp. 194-197 ◽  
Author(s):  
K. D. Buse ◽  
H. J. Keller ◽  
D. Nöthe
Keyword(s):  
Solid State ◽  
Metal Complex ◽  
Linear Chain ◽  
Mixed Valence ◽  
Molecular Iodine ◽  
Platinum Compound ◽  
Physical Evidence ◽  
Mixed Valence Compound

Pt(NH3)2(SCN)2 dissolved in liquid SO2 reacts with molecular iodine to yield a green lustrous solid of stoichiometry Pt(NH3)2(SCN)2I. The compound is diamagnetic in the solid state and in solution and has to be taken for a platinum(II, IV) mixed valence compound, therefore. Chemical and physical evidence so far suggest a linear chain solid with either iodide-bridged metal complex chains or metal complex stacks with parallel triiodide chains.

Crystal data for two cis-o,o'-azodioxytoluene modifications

1982 ◽  
Vol 15 (2) ◽  
pp. 245-246 ◽  
Author(s):  
M. Azoulay ◽  
L. Trysberg
Keyword(s):  
Title Compound ◽  
Crystal Data ◽  
Crystal Forms ◽  
Orthorhombic System ◽  
Space Groups ◽  
Temperature Range ◽  
Compound C ◽  
Cell Dimensions

The title compound, C14H14N2O2, crystallizes from solutions in two different forms, α and β. The α form belongs to the orthorhombic system with cell dimensions a = 15.554(7), b = 15.451(8), c = 10.629(6) Å, V = 2.554(2) Å3 and Z = 8. Possible space groups are I m m a or I m 2 a. The β modification is monoclinic. P21/c, with a = 14.939(14), b = 9.587(5), c = 18.512(8) Å, β = 91.75(4)°, V = 2.598(3) Å3 and Z = 8. Indexed powder data are given for the two crystal forms. Within the temperature range investigated (255–298 K) the β form seems to be metastable.

scholarly journals Crystal structure of 3-bromo-2-hydroxybenzoic acid

2015 ◽  
Vol 71 (5) ◽  
pp. 531-535 ◽  
Author(s):  
Gerhard Laus ◽  
Volker Kahlenberg ◽  
Thomas Gelbrich ◽  
Sven Nerdinger ◽  
Herwig Schottenberger
Keyword(s):  
Crystal Structure ◽  
Salicylic Acid ◽  
Hydrogen Bonds ◽  
Crystal Structures ◽  
Title Compound ◽  
Hydroxybenzoic Acid ◽  
Compound C ◽  
Derivatives Of ◽  
Centrosymmetric Dimers ◽  
Ring Motif

Mutual carboxyl–carboxyl O—H...O hydrogen bonds link the molecules of the title compound, C7H5BrO3, into centrosymmetric dimers which display a centralR22(8) ring motif. In addition, there is an intramolecular hydroxyl–carboxyl O—H...O interaction present. A comparison with the crystal structures of 59 other substituted derivatives of salicylic acid shows that both the centrosymmetric carboxyl–carboxyl O—H...O dimer and the stacking mode of molecules along the shortaaxis observed in the title structure are frequent packing motifs in this set.

scholarly journals (±)-trans-5-Benzoyl-4-(3-bromophenyl)-2-(1H-indol-3-yl)-4,5-dihydrofuran-3-carbonitrile

2012 ◽  
Vol 68 (8) ◽  
pp. o2397-o2397 ◽  
Author(s):  
J. Suresh ◽  
R. Vishnupriya ◽  
P. Gunasekaran ◽  
S. Perumal ◽  
P. L. Nilantha Lakshman
Keyword(s):  
Molecular Structure ◽  
Title Compound ◽  
Furan Ring ◽  
Crystal Packing ◽  
Linear Chain ◽  
Envelope Conformation ◽  
Compound C ◽  
Ring Motif

The furan ring in the title compound, C26H17BrN2O2, adopts a twisted envelope conformation. The molecular structure is stabilized by an intramolecular C—H...O interaction which generates anS(6) ring motif. The crystal packing is stabilized by N—H...O and C—H...Br interactions, generating anR22(16) ring motif and aC(12) linear chain motif, respectively. Weak C—H...π bonding is also observed.

scholarly journals Pseudosymmetry and highZ′ structures: the case ofrac-(2R,2′R,5′S)-2-methyl-5′-[(1R,2R,5S,5′S)-1,4,4,5′-tetramethyldihydro-3′H-3,8-dioxaspiro[bicyclo[3.2.1]octane-2,2′-furan]-5′-yl]-3,4,1′,2′,3′,4′-hexahydro-[2,2′-bifuran]-5(2H)-one

2017 ◽  
Vol 73 (9) ◽  
pp. 1282-1286
Author(s):  
Vincenzo Piccialli ◽  
Angela Tuzi ◽  
Roberto Centore
Keyword(s):  
Structural Analysis ◽  
Catalytic System ◽  
Title Compound ◽  
Symmetry Axis ◽  
Space Group ◽  
Compound C ◽  
Independent Molecules

The title compound, C22H34O6, is one of the products obtained by oxidation of squalene with the catalytic system RuO4(cat.)/NaIO4. It crystallizes in theP-1 space group, with four crystallographically independent molecules related by a pseudo-C2symmetry axis. The structural analysis also shows that the title compound is isomeric with two products previously reported in the literature and that are obtained by the same reaction procedure. In particular, out of the seven chiral C atoms present in the molecule, the title compound shows the opposite configuration at, respectively, four and two chiral centres with respect to the isomeric compounds.

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