Library

feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • 1980-1984  (55)
  • 1
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 2
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 3
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 4
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 113 (1980), S. 226-232 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Crystal and Molecular Structures of the S3N2+ Radical Cation in S3N2+SO3CF3- · 1/2 CH3CN and of S3N2(NSO2F)The molecular and crystal structures of S3N2+SO3CF3- · 1/2 CH3CN (1) and S3N2NSO2F (2) were determined from single crystal X-ray diffraction data. The S3N2+ radical cation in 1 is planar, two cations being connected through weak S—S bonding interactions to form dimers with a chair configuration. The S3N2 ring of 2, in which the NSO2F group is covalently bonded to one of the S atoms of the S — S group, is not planar; the S — S bond is weaker than in 1.
    Notes: Die Röntgenstrukturanalysen von S3N2+SO3CF3- - 1/2 CH3CN (1) und S3N2NSO2F (2) zeigen in 1 ein planares S3N2+-Radikalkation, wobei zwei Kationen über schwache S-S-Wechselwirkungen zu sesselförmigen Dimeren assoziiert sind. Der an einem S-Atom der S — S-Gruppe substituierte S3N2-Ring in 2 ist nicht planar; die S — S-Bindung ist schwächer als in 1.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 463 (1980), S. 56-64 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Dimeric Halogenotellurates(IV): Preparation and Crystal Structure of [(C6H5)4P] 2Te2Br10Similar to the isotypic Te4Cl16, the cubane-like Te4Br16 can be fragmented to oligomeric and monomeric halogenotellurates(IV). [(C6H5)4P]2Te2Br10 is formed by reaction of TeBr4 with (C6H5)4PBr in benzene/acetonitrile solution. The X-ray structural analysis of the compound (a = 10.744, b = 11.787, c = 12.179 Å, α = 71.47°, β = 85.64°, γ = 72.28°, space group P1, Z = 1) shows dimeric Te2Br102- ions to be present, consisting of edge-sharing distorted TeBr6 octahedra. The Te—Br bond lengths are 2.530(2).2.698(2) Å (mean value 2.614 Å) for the terminal, 2.876(2) and 3.000(2) Å for the bridge bonds. The stereochemical activity of the inert pairs at the Te atoms is only weak. The infrared and Raman spectra of the Te2Br102- ion are reported.
    Notes: Wie das isotype Te4Cl16 kann auch das cubanartige Te4Br16 zu oligomeren und monomeren Halogenotelluraten(IV) abgebaut werden. [(C6H5)4P]2Te2Br10 entsteht bei der Reaktion von TeBr4 mit (C6H5)4PBr in Benzol/Acetonitril. Die Röntgenstrukturanalyse der Verbindung (a = 10,744, b = 11,787, c = 12,179 Å, α = 71,47°, β = 85,64°, γ = 72,28°, Raumgruppe P1, Z = 1) zeigt, daß ein dimeres, aus kantenverknüpften, verzerrten TeBr6-Oktaedern bestehendes Te2Br102--Ion vorliegt. Die Te—Br-Bindungslängen betragen 2,530(2).2,698(2) Å (Mittelwert 2,614 Å) für die endständigen, 2,876(2) und 3,000(2) Å (M.2,938 Å) für die Brückenbindungen. Die stereochemische Aktivität der inerten Elektronenpaare am Te ist nur gering. Über die IR- und Raman-Spektren des Te2Br Br102--Ions wird berichtet.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 462 (1980), S. 49-56 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: New PdxAly Phases and the Compound Pd5AII2The new phases Pd2.4-2.9Al, Pd2.99-3.3Al, and Pd3.8-4.15Al were prepared by synthesis from molten mixtures and subsequent annealing at 600°C, or by reaction in the presence of iodine at 600°C, and were identified by X-ray powder diagrams. In the iodine-containing systems, the same phases resulted from the relation between composition of the gas phase and the structure of the solid reaction component.The existence of Pd5Al3 was confirmed.The new compound Pd5AlI2, the crystal structure of which was determined from a single crystal X-ray analysis, has a tetragonal layer structure with a = 405.2 and c = 1955.9 pm, space group I4/mmm. Iodine layers alternate with ordered Pd/Al slabs. The compound is a metallic conductor with highly preferred conductivity parallel to the layers.
    Notes: Durch Schmelzsynthese und Temperung bei 600°C sowie durch Synthese in Gegenwart von Iod bei 600°C wurden rötgenographisch die neuen Phasen Pd2,4-2,9Al, Pd2,99-3,3Al und Pd3,8-4,15Al gefunden. Die gleichen Phasen ergaben sich im iodhaltigen System aus dem Zusammenhang von Gasphasenzusammensetzung und Bodenkörperstruktur.Die. Existenz von Pd5Al3 wurde bestätigt.Die neue Verbindung Pd5AlI2, deren Kristallstruktur aus Einkristall-Röntgendaten bestimmt wurde, besitzt ein tetragonales Schichtgitter mit a = 405,2 und c = 1955,9 pm, Raumgruppe I4/mmm, in dem Iodschichten und Pd/Al-Schichten miteinander abwechseln. Die Verbindung ist ein metallischer Leiter mit stark bevorzugter Leitfähigkeit in Richtung der Schichten.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 462 (1980), S. 143-151 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Selenostannates from Aqueous Solutions: Preparation and Structure of Na4SnSe4 · 16 H20Pure selenostannates(IV) are prepared from aqueous solutions by reaction of SnSe2, with alkali selenides, strictly excluding oxygen. Na4SnSe4 · 16 H2O, being obtained from stoicheo-metric 1:2 quantities, is characterized by a complete X-ray structure analysis and by vibrational spectra. The compound is monoclinic (P21/m) with a = 8.673(3), b = 16.563(4), c = 8.647(2) Å, β = 92.10(2)°, Z = 2; it contains isolated tetrahedral SnSe44- ions [Sn—Se 2.504(2)-2.527(2) Å, Se—Sn—Se 106.6(1)-111.1(1)°] which are in contact to the hydrated octahedral [Na(OH2)6]+ ions through Se…H—O bridges within an extensive hydrogen bridge system.The stretching vibrations of the SnSe44- ion are observed at 195 (n̈1) and 252 cm-1 (n̈3). The stretching force constant is approximately 1.59 mdyn/Å.
    Notes: Selenostannate(IV) sind aus wäßriger Lösung bei Ausschluß von Sauerstoff durch Umsetzung von Alkaliseleniden mit SnSe2 rein darstellbar. Das aus stöchiometrischen Ansätzen synthetisierte Na4SnSe4 · 16 H2O wurde durch eine vollständige Röntgenstrukturanalyse charakterisiert. Es kristallisiert monoklin (P21/m) mit a = 8,673(3), b = 16,563(4), c = 8,647(2) Å, β = 92,10(2)°, Z = 2 und enthält isolierte tetraedrische SnSe44- -Ionen [Sn—Se 2,504(2) bis 2,527(2)Å, Se—Sn—Se 106,6(1) bis 111,1(1)°], die über Se…H—O-Brücken in einem ausgedehnten Wasserstoff-brückensystem mit den hydratisierten Kationen in Kontakt stehen.Die Valenzschwingungen des SnSe44- -Ions werden bei 195 (ν1) und 252 cm-1 (ν3) beobachtet. Die Valenzkraftkonstante beträgt etwa 1,59 mdyn/Å.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 9
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: A Contribution to the Coordination in the Gaseous MAl2Cl8 Complexes. Visible Spectrum of CoAl2ClnI8-n and Crystal Structure of PdAl2Cl8The band wavenumbers in the visible spectrum of the mixed halogen complexes CoAl2ClnI8-n are observed between those of CoAl2Cl8 and CoAl2I8. The molar extinctions are comparable for all three cases. It can be concluded that the halogen coordination around cobalt is distorted octahedral.The crystal structure of PdAl2Cl8 was determined from single crystals. The compound is monoclinic, space group P21/c, with a = 6,583(3), b = 7.342(3), c = 13.033(5) Å, β = 96.40(3)°. The structure contains two molecular PdAl2Cl8 units per cell. Pd is in a tetragonal planar coordination of 4 Cl.The remissionspectrum of solid PdAl2Cl8 corresponds to the spectrum of the gaseous compound. The crystal structures of the compounds MAl2Cl8 are discussed, especially the relationship of the structure of the gaseous molecule CoAl2Cl8 with the known crystal structure of this compound.
    Notes: Das für gasförmige halogen-gemischte Komplexe CoAl2ClnI8-n gemessene Spektrum liegt auf der Skala der Wellenzahlen zwischen denen von CoAl2Cl8 und CoAl2I8. Die molare Extinktion ist in allen drei Fällen von vergleichbarer Größe. Daraus ist zu schließen, daß die Koordination des Kobalts durch Halogen bei diesen Verbindungen verzerrt oktaedrisch ist.Die Kristallstruktur von PdAl2Cl8 wurde mit Einkristallen bestimmt. Die Verbindung kristallisiert monoklin mit a = 6,583(3), b = 7,342(3), c = 13,033(5) Å, β = 96,40(3)°; Raumgruppe P21/c. Es liegt ein Molekelgitter mit 2 PdAl2Cl8-Molekeln/Zelle vor. Pd ist quadratisch-planar von Cl umgeben.Das Remissionsspektrum des festen PdAl2Cl8 stimmt mit dem Absorptionsspektrum der gasförmigen Verbindung überein.Die Kristallstrukturen der Verbindungen MAl2Cl8, insbesondere der Zusammenhang der Struktur der Gasmolekel CoAl2Cl8 mit der bekannten Kristallstruktur dieser Verbindung werden behandelt.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
  • 10
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Preparation of trans-[Mo6Cl8]Cl4Br22- Starting from Crystalline [Mo6Cl8]Cl4(H2O)2 and Crystal Structure of [(C6H5)4As]2[Mo6Cl8]Cl4Br2The synthesis of the title compound is successful if the crystallized [(Mo6Cl8)Cl4(H2O)2] containing the H2O molecules in trans-position reacts with HBr + [(C6H5)4As]Br in ethanol in a heterogeneous reaction. The X-ray structure investigation confirms the existence of discrete trans-Br-substituted cluster anions of composition [(Mo6Cl8)Cl4Br2]2- in the crystal. The reaction in homogeneous solutions proceeds to Br-enriched compounds. [(C6H5)4As]2[(Mo6Cl8)Cl4Br2] crystallizes in the triclinic space group P¯1 with a = 11.071(2), b = 11.418(2), c = 12.813(2) Å, α = 116.10(2), β = 95.27(2) and γ = 94.41(2)° (-133°C). The crystal structure at -133°C was determined from single crystal X-ray diffraction data (R1 = 0.026). The [(Mo6Cl8)Cl4Br2]2--anions are not completely ordered but distributed statistically among the three positions which are possible within the limits of the ordered [Mo6Cl8]-cores (ratio 11:5:4). The frameworks of the anions consist of Mo6 cluster units with (slightly distorted) octahedral arrangement of the metal atoms (d(Mo—Mo): 2.600(1) up to 2.614(1) Å), which are coordinated by the halogeno ligands in a square-pyramidal manner. The details of the structure will be discussed and compared with similar [(Mo6X8)Y4] cluster units (X, Y = Cl, Br).
    Notes: Die Darstellung der in der Überschrift genannten Verbindung gelingt, wenn das kristallisierte [(Mo6Cl8)Cl4(H2O)2], das die H2O-Molekeln in trans-Stellung enthält, in Ethanol mit HBr + [(C6H5)4As]Br in heterogener Reaktion umgesetzt wird. Die röntgenographische Untersuchung bestätigt, daß im Kristall das isolierte trans-Br-substituierte Clusteranion [(Mo6Cl8)Cl4Br2]2- vorliegt. In homogener Lösung läft die Reaktion weiter zu Br-reicheren Produkten. [(C6H5)4As]2[(Mo6Cl8)Cl4Br2] kristallisiert in der triklinen Raumgruppe P¯1 mit a = 11,071(2), b = 11,418(2), c = 12,813(2) Å, α = 116,10(2), β = 95,27(2) und γ = 94,41(2)° (-133°C). Die Kristallstruktur bei -133°C wurde aus Einkristalldiffraktometerdaten bestimmt (R1 = 0,026). Die [(Mo6Cl8)Cl4Br2]2--Anionen sind im Kristall nicht vollständig geordnet, sondern verteilen sich statistisch im Verhältnis 11:5:4 auf die bei definiertem [Mo6Cl8]-Gerüst möglichen drei Positionen mit trans-ständiger Anordnung der Br-Liganden. Die Gerüste der Anionen bestehen aus Mo6-Clustern mit (leicht verzerrter) oktaedrischer Anordnung der Metallatome (d(Mo—Mo): 2,600(1) bis 2,614(1) Å), die quadratischpyramidal von Halogenatomen koordiniert sind. Die Einzelheiten der Struktur werden im Vergleich mit analog gebauten [(Mo6X8)Y6]-Clustern (X, Y = Cl, Br) diskutiert.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...