Kristallstruktur des Doppelkomplexsalzes trans-(py2CH2)[Pt(OH)2(ox)2]transs-(py2CH2)[Pt(OH)(ox)2(H2O)]2·4H2O / Crystal Structure of the Double Complex Salt trans-(py2CH2)[Pt(OH)2(ox)2](H2O)]2·4H2O

1998 ◽  
Vol 53 (5-6) ◽  
pp. 569-572 ◽  
Author(s):  
J.-G. Uttecht ◽  
W. Preetz
Keyword(s):  
Crystal Structure ◽  
Aqueous Solution ◽  
Hydrogen Peroxide ◽  
Hydrogen Bonds ◽  
Structure Determination ◽  
Complex Salt ◽  
Double Complex ◽  
Double Complex Salt ◽  
X Ray ◽  
Complex Anions

Abstract By treatment of [Pt(ox)2]2- with hydrogen peroxide the octahedral trans-[Pt(OH)2(ox)2]2- is formed. From the saturated aqueous solution in the presence of dipyridiniomethane dications single crystals of the double complex salt trans-(py2CH2)[Pt(OH)2(ox)2] trans-(py2CH2)[Pt(OH)(ox)2(H2O)]2 · 4H2O were grown and an X-ray structure determination (tricli­nic, space group P1̄, a = 8.649(1), b = 11.189(3), c = 12.731 (2) Å, α = 79.075(12), β = 80.725(8), γ= 73.932(13)°, Z = 1) has been performed. The centrosymmetric trans-[Pt(OH)2(ox)2]2- is connected via hydrogen bonds between its hydroxide groups and the aqua ligands of two protonated complex anions trans-[Pt(OH)(ox)2(H2O)]- .

scholarly journals Notizen: Synthese und Kristallstruktur von PPh3Me[HSO4]/ Synthesis and Crystal Structure of PPh3Me[HSO4]

1988 ◽  
Vol 43 (8) ◽  
pp. 1069-1071 ◽  
Author(s):  
Fritjof Schmock ◽  
Aida Müller ◽  
Ulrich Müller ◽  
Kurt Dehnicke
Keyword(s):  
Crystal Structure ◽  
Aqueous Solution ◽  
Hydrogen Bonds ◽  
Structure Determination ◽  
Ir Spectrum ◽  
Crystal Data ◽  
Synthesis And Crystal Structure ◽  
X Ray ◽  
Silver Sulfate ◽  
By Products

AbstractPPh3Me[HSO4] was prepared by the reaction of (PPh3Me)I with silver sulfate in aqueous solution. OPPh2Me and benzene being the by-products. The title compound was characterized by its IR spectrum as well as by an X-ray structure determination (1730 observed independent reflexions, R = 0.043). Crystal data: a = 910.4(3). b = 1587.8(4), c = 1294.2(6) pm, β = 105.52(3)°. space group P21/c, Z = 4. The structure consists of PPh3Me⊕ cations and of HOSO3⊖ ions that are associated via strong hydrogen bonds to dimeric centrosymmetric units.

The protonation of the ethylenediphosphinetetraacetate anion and the crystal structure of the bis (hydrogen bromide) of ethylenediphosphinetetraacetic acid

1981 ◽  
Vol 46 (12) ◽  
pp. 3063-3073 ◽  
Author(s):  
Jana Podlahová ◽  
Bohumil Kratochvíl ◽  
Vratislav Langer ◽  
Josef Šilha ◽  
Jaroslav Podlaha
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Structure Determination ◽  
Free Acid ◽  
Hydrogen Bromide ◽  
Carboxyl Groups ◽  
Spectroscopic Methods ◽  
X Ray ◽  
Partial Formation

The equilibria and mechanism of addition of protons to the ethylenediphosphinetetraacetate anion (L4-) were studied in solution by the UV, IR, 1H and 31P NMR spectroscopic methods. A total of six protons can be bonded to the anion. They are added stepwise, first with partial formation of zwitterions containing P-H bonds, which then dissociate with formation of the free acid, H4L, where all four protons are bonded in carboxyl groups. The formation of zwitterions is strongly dependent on the concentration. In the final stage, the acid bonds two additional protons to form the bis-phosphonium cation, H6L2+. A number of isostructural salts containing this cation, H4L.2 HX (X = Cl, Br, I), have been prepared. The X-ray crystal structure determination of the bromide confirmed the expected arrangement. The bromide crystals are monoclinic, a = 578.2, b = 1 425.0, c = 1 046.7 pm, β = 103.07° with a space group of P21/c, Z = 2. The final R factor was 0.059 based on 1 109 observed reflections. The structure consists of H6L2+ cations containing protons bonded to phosphorus atoms (P-H distance 134 pm) and of bromide anions, located in gaps which are also sufficiently large for I- anions in the isostructural iodide. The interbonding of phosphonium cations proceeds through hydrogen bonds, C-OH...O=C, in which the O...O distance is 275.3 pm.

On the Origin of the Red Color of Aqueous-Solutions of 2,3-Dichloro-5,6-Dicyano-1,4-Benzoquinone (ddq). Crystal Structure of the Ammonium Salt of 2-Cyano-5,6-Dichloro-3-Hydroxy-1,4-Benzoquinone

1987 ◽  
Vol 40 (3) ◽  
pp. 625 ◽  
Author(s):  
HD Becker ◽  
BW Skelton ◽  
AH White
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Aqueous Solutions ◽  
Single Crystal ◽  
Ammonium Salt ◽  
Structure Determination ◽  
Aqueous Ethanol ◽  
X Ray ◽  
Red Color ◽  
Hydrolysis Of

Hydrolysis of 2,3-dichloro-5,6-dicyano-1,4-benzoquinone in aqueous ethanol gives the deep-red coloured ammonium salt of a monocyano-dichloro-monohydroxy-benzoquinone which crystallizes in the tetragonal space group I41 /a, a 20.832(5), c 8.618(2) �, Z 16. Single-crystal X-ray structure determination (R 0.036 for 1185 'observed' reflections) show the presence of ammonium cations forming hydrogen bonds in the lattice alternatingly with the tautomeric anion of 2-cyano-5,6-dichloro-3-hydroxy-1,4-benzoquinone and 3-cyano-5,6-dichloro-4-hydroxy-1,2-benzoquinone.

Schwingungsspektren und Normalkoordinatenanalyse von Hexathiocyanatoplatinat(IV), Kristallstruktur von [Py2CH2][Pt(SCN)6] / Vibrational Spectra and Normal Coordinate Analysis of Hexathiocyanatoplatinate(IV), Crystal Structure of [Py2CH2][Pt(SCN)6]

1998 ◽  
Vol 53 (1) ◽  
pp. 13-16
Author(s):  
J. Seemann ◽  
W. Preetz
Keyword(s):  
Crystal Structure ◽  
Aqueous Solution ◽  
Low Temperature ◽  
Single Crystal ◽  
Vibrational Spectra ◽  
Structure Determination ◽  
Normal Coordinate Analysis ◽  
Normal Coordinate ◽  
X Ray ◽  
Ir And Raman

By treatment of [PtCl6]2- with an excess of SCN– in aqueous solution [Pt(SCN)6]2- is formed. The X-ray structure determination on a single crystal of [Py2CH2][Pt(SCN)6] (orthor-hombic, space group Pna21, a = 15.5084(9), b = 11.8444(11), c = 13.2830(9)Å, Z = 4) shows, that the thiocyanate groups are exclusively S-coordinated with average Pt-S distances of 2.378 Å and Pt-S-C angles in the range from 103.1° to 108.1°. Based on the molecular parameters of the X-ray determination the low temperature (10 K) IR and Raman spectra have been assigned by normal coordinate analysis. The valence force constant is fd(PtS) = 1.62 mdyn/Å.

Structural studies in the iron(III)/chloride/α,α'-diimine system. III. Crystal structures of Tris(2,2'-bipyridine)iron(II) μ-Oxo-bis[trichloroferrate(III)] and of 'Compound A', μ-Oxo-bis[cis-chlorobis(1 ,10-phenanthroline)iron(III)] chloride solvate

1983 ◽  
Vol 36 (10) ◽  
pp. 2057 ◽  
Author(s):  
PC Healy ◽  
BW Skelton ◽  
AH White
Keyword(s):  
Crystal Structure ◽  
Aqueous Solution ◽  
Single Crystal ◽  
Least Squares ◽  
Structure Determination ◽  
Ionic Species ◽  
Structural Studies ◽  
X Ray Diffraction ◽  
Compound A ◽  
X Ray

The crystal structure of [Fe(bpy)3] [CI3FeOFeCI3] (1) has been determined by single-crystal X-ray diffraction at 295 K, and refined by least squares to a residual of 0.058 for 2002 'observed' reflections. Crystals are monoclinic, P21/c, a 9.616(3), b 26.264(6), c 13.821(7) Ǻ, β 99.68(2)°, Z4. In the cation, Fe-N distances range from 1.956(9) to 1 .989(10) Ǻ; in the anion, Fe-Cl distances range from 2.196(5) to 2.225(5) Ǻ. Fe-O distances are 1.763(11) and 1.740(11) Ǻ, and the Fe-O-Fe angle is 148.9(7)°. Recrystallization of 'compound A' from methanolic aqueous solution yields crystals with stoichiometry [{cis-Fe(phen)2Cl}2O]Cl2.nH2O( n ≈ 4.5) as established by structure determination (hampered by serious disorder); R is 0.09 for 749 'observed' reflections. Crystals are orthorhombic, Pcn2, a 18.05(1), b 13.83(1), c 10.481(6) Ǻ, Z 2. The Fe-N distances trans to each other are 2.12(3) and 2.13(3) Ǻ; Fe-N distances trans to Cl and O are 2.20(2) and 2.28(2) Ǻ, respectively. Fe-CI is 2.34(1) and Fe-O 1.787(6) A; Fe-O-Fe is 161(1)°. For crystals from aqueous solution, an isomorphous but larger unit cell is obtained [2754(7), cf. 2616(3) Ǻ3]; it is believed that this is a consequence of variable occupancy of the disordered solvent layers which lie parallel to bc between the ionic species.

Crystal and Molecular Structure of 4-Arylhexahydro-1H,3H-pyrido[1,2-c]pyrimidine-1,3-dione Derivatives

2002 ◽  
Vol 57 (11) ◽  
pp. 1315-1319 ◽  
Author(s):  
Irena Wolska ◽  
Franciszek Herold
Keyword(s):  
Molecular Structure ◽  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Structure Determination ◽  
Phenyl Ring ◽  
Crystal And Molecular Structure ◽  
X Ray ◽  
Saturated Ring ◽  
Centrosymmetric Dimers

The X-ray crystal structure determination of 4-(2-methylphenyl)hexahydro-1H,3H-pyrido[ 1,2-c]pyrimidine-1,3-dione (2) and 4-(3-methylphenyl)hexahydro-1H,3H-pyrido[1,2-c]- pyrimidine-1,3-dione (3) is reported. The crystal structures show the formation of centrosymmetric dimers via intermolecular N-H···O hydrogen bonds. The saturated ring adopts a slightly distorted halfchair conformation in both 2 and 3. In either compound the planar phenyl ring is twisted with respect to the pyrimidine-1,3-dione fragment.

Synthesis and Crystal Structure of (dmaaH)2(dmaH)2[P12Sn12N12(NH)2] · 4 dmaa, dmaa = N,N-Dimethylacetamide, dma = Dimethylamine, an Anhydrous Example of the P12N14Cage

2001 ◽  
Vol 56 (10) ◽  
pp. 1020-1024
Author(s):  
Stephan Roth ◽  
Wolfgang Schnick
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonds ◽  
Single Crystals ◽  
Structure Determination ◽  
Title Compound ◽  
Saturated Solution ◽  
Synthesis And Crystal Structure ◽  
X Ray

Abstract The title compound (dmaaH)2(dmaH)2[P12S12N12(NH)2] · 4 dmaa (1) was obtained by crys­tallization from a saturated solution of anhydrous P12S12N8(NH)6 in N,N-dimethylacetamide (dmaa) as large single crystals. According to the X-ray structure determination (P21/n, a = 1421.8(1), b = 1556.5(2), c = 1645.8(1) pm, ß = 112.207(6)°, Z = 2, 6388 observed reflections, R1 = 0.046, wR2 = 0.111) the anionic cage is built up from twelve P3N3 rings in boat confor­ mation. N,N-dimethylammonium ions (dmaH+) are directly connected to the cage, and pairs of N,N-dimethylacetamidonium ions (dmaaH+) and N,N-dimethylacetamide molecules (dmaa) are interconnected by hydrogen-bonds.

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