GLORIA

GEOMAR Library Ocean Research Information Access

feed icon rss

Your email was sent successfully. Check your inbox.

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

Proceed reservation?

Export
  • 1
    ISSN: 0009-2940
    Keywords: Ether-phosphines ; Palladium complexes ; Fluxional behavior ; Hydrogenation ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Novel Basic Ligands for the Homogeneous Catalytic Carbonylation of Methanol, XXVIII.  -  Synthesis, Properties and Fluxional Behavior of (Ether-Phosphine)palladium ComplexesCl2Pd(COD) (1) (COD = 1,5-cyclooctadiene) reacts with 1 equiv, of the (ether-phosphine) ligand Ph2P∼D (2a-c) (D = CH2C4H7O (a), CH2C4H7O2 (b), CH2CH2OCH3 (c)] to give the dimeric complexes [μ-ClPdCl(Ph2P∼D)]2 (3a-c) (P∼D = η1-P-coordinated). According to the field-desorption mass spectra which show only one peak for the monomeric moieties ClPd(Ph2P∼D), 3a-c have a very weak Pd2Cl2 bridge. trans-Cl2Pd(Ph2P∼D)2 (4a-c) is obtained either from 3a-c and 2a-c by cleaving the Pd2Cl2 bridge or from 1 and 2 equiv. of the ligands 2a-c. 4c crystallizes in the monoclinic space group P21/c with Z = 2. AgClO4 selectively abstracts one Cl⊖ ligand from 4a-c which results in the formation of the cationic complexes [trans-(Ph2P∩D)(Ph2P∼D)PdCl]⊕ (5a-c) (P∩D = η2-D,P-coordinated) containing one chelated and one η11-P-bonded (ether-phosphine) ligand. 5a-c show fluxional behavior which is demonstrated by temperature-dependent 31P{1H}-NMR investigations. The coalescence points have been determined and are at 253 (5a), 303 (5b), and 283 K (5c). The activation enthalpies ΔG
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 123 (1990), S. 251-256 
    ISSN: 0009-2940
    Keywords: Arsonium salts, tri- and tetraferrio- / Arsane, tris(trimethylsilyl)- / Permetalated tetrahedral main group elements ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Tris(trimethylsily1)arsane as a Starting Compound for Tri- and Tetraferrioarsonium Salts; Crystal Structure of [{Cp(CO)2Fe}3AsOH]B(C6H5)4Tris(trimethylsilyl)arsane (1) reacts with an excess of CpFe(O)2Cl (2) to give tetraferrioarsonium chloride [{Cp(CO)2Fe}4As]Clk (4a), which may be converted into the corresponding tetraphenylborate 4b by Na[B(6H5)4]. In the Presence of water one organometallic ligand is hydrolysed to yield the triferriohydroxyarsonium tetraphenylborate 5 which crystallizes in the triclinic space group P&1bar; and shows a trigonal pyramidal configuration at the arsenic atom.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 123 (1990), S. 979-982 
    ISSN: 0009-2940
    Keywords: Chalkogenido complex, mixed, of molybdenum ; Disproportionation of SO2 ; Sulfur, dioxide, monoxide ; Oxidative addition of SO ; Molybdenum complexes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Disproportionation of Sulfur Dioxide by the Molybdenum(0) Complex trans-[(dppe)2Mo(N2)2]. Molecular Structure of trans-[(dppe)2Mo(S)O]·SO2·H2S04Sulfur dioxide disproportionates into sulfur monoxide and sulfuric acid, when it is passed through a solution of the molybdenum(0) complex trans-[(dppe)2Mo(N2)2] (1) in toluene. Whereas SO undergoes an oxidative addition reaction onto the intermediate 14 VE-complex fragment (dppe)2Mo to give the mixed dichalkogenidomolybdenum(IV) complex trans-[(dppe)2Mo(S)O] (3), both molecules H2SO4 and intact SO2 remain in the solvating sphere. According to an X-ray structural analysis 3 crystallizes in the monoclinic space group P21/n and shows an octahedral configuration at the central molybdenum atom with the oxo and sulfido ligands in trans positions; the two solvent molecules ethanol and toluene are also incorporated into the crystal lattice.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 582 (1990), S. 7-14 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Fluoroderivatives of Diphenylacetylene Complexes of Tungsten. Crystal Structure of [Na-15-crown-5] [WF5(PhC≡CPh)]The reactions of [WCl4(PhC≡CPh)]2 with lithium fluoride, sodium fluoride, and potassium fluoride in acetonitrile suspensions lead in presence of the corresponding crown ethers to the complexes [Li-12-crown-4][WFCl4(PhC≡CPh)] (1), [Na-15-crown-5][WF5(PhC≡CPh)] (2), and [K-18-crown-6][WF5(PhC≡CPh)] (3), respectively. The compounds form orange-yellow crystal powders, soluble in acetonitrile, and only sparingly moisture sensitive. 1-3 are characterized by IR spectroscopy, 2 also by its 13C-nmr spectrum. The crystal structure of 2 was solved by X-ray methods. Space group P212121, Z = 4, 4555 observed unique reflexions, R = 0.039. Lattice dimensions at 20°C: a = b = 1403.4(2); c = 1335.6(2) pm. [Na-15-crown-5][WF5(PhC≡CPh)] forms ion pairs via two Na—F contacts with bond lengths of 226.0 and 257.4 pm; thus the sodium ion being sevenfold coordinated by the five oxygen atoms of the crown ether molecule and by two fluorine ligands. The diphenylacetylene ligand is side on bonded to the tungsten atom of the [WF5(PhC≡CPh)]- unit with W—C bond lengths of 202.9 and 204.9 pm, respectively, corresponding to a metallacyclopropene structure.
    Notes: Die Reaktionen von [WCl4(PhC≡CPh)]2 mit Lithiumfluorid, Natriumfluorid bzw. Kaliumfluorid führen in Acetonitrilsuspensionen in Gegenwart der entsprechenden Kronenether zu den Komplexen [Li-12-Krone-4][WFCl4(PhC≡CPh)] (1), [Na-15-Krone-5][WF5(PhC≡CPh)] (2), bzw. [K-18-Krone-6][WF5(PhC≡CPh)] (3). Die Verbindungen bilden gelborange diamagnetische Kristallpulver, die in Acetonitril leicht löslich, im trockenen Zustand nur wenig feuchtigkeitsempfindlich sind. Von 1 bis 3 werden die IR-Spektren mitgeteilt, von 2 auch das 13C-Kernresonanzspektrum. Von 2 wurde auch eine röntgenographische Strukturanalyse ausgeführt. Raumgruppe P212121, Z = 4, 4555 unabhängige beobachtete Reflexe, R = 3,9%. Die Gitterabmessungen betragen bei 20°C: a = b = 1403,4(2); c = 1335,6(2) pm. [Na-15-Krone-5][WF5(PhC≡CPh)] bildet Ionenpaare, in denen die durch die Kronenethermoleküle komplexierten Na+-Ionen mit zwei F-Atomen des Anions [WF5(PhC≡CPh)]- Kontakte mit Na—F-Abständen von 226,0 bzw. 257,4 pm ausbilden. Der Diphenylacetylenligand ist entsprechend einer Metallacyclopropengruppe seitlich an das Wolframatom mit W—C-Abständen von 202,9 bzw. 204,9 pm gebunden.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
  • 5
    facet.materialart.
    Unknown
    In:  EPIC3Supercomputing - das neue Werkzeug für Wissenschaft und Forschung Veröffentl d. Rechenzentrums Stuttgart
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , peerRev
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...