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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 608 (1992), S. 17-22 
    ISSN: 0044-2313
    Keywords: Barium-crownether complex ; octaselenido cadmate ; synthesis ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Crystal Structure of [Ba(18-Crown-6)(DMF)4][Cd(Se4)2]The title compound has been prepared by the reaction of a DMF-solution of lithium polyselenide with BaSe2 and cadmium acetate in the presence of 18-crown-6, forming black crystals. The compound was characterized by IR spectroscopy and by an X-ray structure determination. Space group P2/a, Z = 4, 5392 observed unique reflections, R = 0.048. Lattice dimensions at -90°C: a = 2021.9(12); b = 1019.8(6); c= 2270.8(14)pm, ß = 106.98(4)°. The structure consists of [Ba(18-crown-6)(DMF)4]2+ ions, in which the barium ions are coordinated by the six oxygen atoms of the crown ether molecule and by four oxygen atoms of the DMF molecules, and of [Cd(Se4)2]2- ions. The cadmium atoms are coordinated by two tetraselenide ions in a chelating fashion.
    Notes: Die Titelverbindung entsteht in Form schwarzer Kristalle bei der Einwirkung einer Lithiumpolyselenidlösung auf Bariumdiselenid und Cadmiumacetat in Dimethylformamid in Gegenwart von 18-Krone-6. Die Verbindung wurde durch das IR-Spektrum und eine röntgenographische Strukturanalyse charakterisiert. Raumgruppe P2/a, Z = 4, 5392 beobachtete unabhängige Reflexe, R = 4,8%. Gitterabmessungen bei -90°C: a = 2021,9(12); b = 1019,8(6); c = 2270,8(14) pm, ß = 106,98(4)°. Die Struktur ist aufgebaut aus [Ba(18-Krone-6)(DMF)4]2+-Ionen, in denen die Bariumionen von den sechs Sauerstoffatomen des Kronenethers und von vier O-Atomen der DMF-Moleküle koordiniert sind, und [Cd(Se4)2]2- -Anionen. In diesen sind die Cadmiumatome von zwei Tetraselenidionen chelatartig umgeben.
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 608 (1992), S. 173-183 
    ISSN: 0044-2313
    Keywords: Titanium ; zirconium ; hafnium ; cobalt carbonyl derivatives ; preparation ; i.r. ; 1H n.m.r.spectra ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Titanium-, Zirconium- und Hafniumderivate von CobaltcarbonylenBimetallische und trimetallische Verbindungen mit M-Co-Bindungen (M = Ti, Zr, Hf) werden erhalten durch Reaktionen von R41-Derivaten (R1 = PhCH2; R22N; R2 = Me, Et) mit HCo(CO)4 (A) bzw. durch Umsetzung von R31MX-Derivaten (X = CI, Br; R1 = PhCH2, R22N und R3O; R3 = i-Pr, n-Bu) mit Na[Co(CO)4] (B). Dabei wurden Verbindungen des Typs R31MCo(CO)4 mit R1 = PhCH2, R2)2N und solche des typs R21M[Co(CO)4]2 mit R1 = PhCH2 nach den Methoden A und B gewonnen während (R3O)4-n Ti[Co(Co)4]n-Derivate (n = 1,2) nur gemäß Methode B zugängig waren.Phosphan- und Phosphitderivate der angeführten Verbindungen wurden erhalten bei Substitution von jeweils einer CO-Gruppe durch PR34-Liganden bzw. durch Reaktion von HCo(CO)3(PR34 mit R41M Verbindungen. Der Einfluß der Substituenten R1 und PR34 auf die Stabilität der Verbindungen wird diskutiert.
    Notes: Bimetallic and trimetallic compounds containing unsupported bonds of subgroup 4 metals (M = Ti, Zr, Hf) and Co were prepared by hydride elimination (A) from R41M derivatives (R1 = PhCH2; R22N; R2 = Me, Et)) and by salt elimination (B) from R31MX (X = Cl, Br; R.1 = PhCH2, R22N and R3O; R3= i-Pr, n-Bu)) by reaction with HCo(CO)4 and Na[Co(CO)4], respectively. Compounds R31MCo(CO)4 with R1 = PhCH2, R21M[Co(CO)4]2 R.1 = PhCH2, were prepared both by methods A and B, while (R3O)4-n Ti[Co(Co)4]n (n = 1, 2) compounds were obtained by reaction B. Several tertiary phosphine and phosphite derivatives of the former two types were obtained by substitution of a carbonyl group by PR34 ligand or by A type reaction of HCo(CO)3(PR34 with R41M compounds.
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  • 3
    ISSN: 0044-2313
    Keywords: Mixed polyselenido complexes of zinc/tungsten, Mercury/tungsten ; crystal structures ; FIR spectra ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Syntheses and Crystal Structures of the Polyselenido Complexes (PPh4)6[M(Se4)2]2[WSe4] · DMF with M = Zinc and MercuryThe title compounds have been prepared by the reactions of the acetates of zinc and mercury, respectively, with excess (PPh4)2 WSe4 in boiling dimethylformamide, forming black-red single crystals. According to the X-ray structure determinations both compounds crystallize isotypically in the space group 12/a with four formula units per unit cell. (PPh4)6[Zn(Se4)2]2[WSe4] · DMF: a = 2888.1(6), b = 1740.3(2), c = 2893.9(4) pm, β = 90.47(1)°. 3230 observed unique reflections, R = 0.009.(PPh4)6[Hg(Se4)2]2[WSe4] · DMF: a = 2891.8(5), b = 1738.0(4), c = 2920.1(5) pm, β = 90.29(2)°. 2978 observed unique reflections, R = 0.115%.The compounds consist of PPh4+ ions, spirocyclic octaseleno metallates [M(Se4)2]2-, tetrahedral WSe42-ions, and disordered DMF Molecules.
    Notes: Die Titelverbindungen entstehen in Form schwarz-roter Einkristalle beim Erhitzen der Acetate von Zink und Quecksilber mit überschüssigem (PPh4)2 WSe4 in Dimethylformamid-Lösungen. Nach den Röntgenstrukturanalysen kristallisieren die Verbindungen isotyp in der Raumgruppe I2/a mit vier Formeleinheiten pro Elementarzelle. (PPh4)6[Zn(Se4)2]2[WSe4]· DMF: a = 2888,1(6), b = 1740,3(2), c = 2893,9(4) pm, β = 90,47(1)°. 3230 beobachtete unabhängige Reflexe, R = 9,9%.(PPh4)6[Hg(Se4)2]2[WSe4] · DMF: a = 2891,8(5), b = 1738,0(4), c = 2920,1(5) pm, β = 90,29(2)°. 2978 beobachtete unabhängige Reflexe, R = 11,5%.Die Verbindungen bestehen aus PPh4 +-Ionen, spirocyclischen Octaselenometallaten [M(Se4)2]2-, tetraedrischen WSe42- Ionen und eingelagerten, fehlgeordneten DMf-Molekülen.
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  • 4
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Reaction of Tin Tetrachloride with Hexakis(trimethylsilyl)-1,4-benzdiamidine. Crystal Structures of C6H4[C(NSiMe3)2SnCl3 · CH3CN]2 and [Na-benzo-15-crown-5]2SnCl6The bis-amidinato complex C6H4[C(NSiMe3)2SnCl3 · CH3CN]2 (1) has been prepared by the reaction of tin tetrachloride with hexakis(trimethylsilyl)-1,4-benzdiamidine in the presence of acetonitrile, forming colourless, moisture sensitive crystals, which easily release the coordinated acetonitrile in vacuo. With sodium fluoride 1 reacts in acetonitrile solution in the presence of benzo-15-crown-5 forming [Na-benzo-15-crown-5]2SnCl6 (2). 1 and 2 are characterized by IR spectroscopy as well as by X-ray structure determinations.C6H4[C(NSiMe3)2SnCl3 · CH3CN]2 (1). Space group P21/c, Z = 2, 1700 observed unique reflexions, R = 0.045. Lattice dimensions at 19°C: a = 818.6, b = 1 838.2, c = 1 484.1 pm, β = 96.58°. 1 forms monomeric centrosymmetric molecules with the amidinato groups in 1,4-position of the C6H4 ring. The tin atoms are sixfold coordinated by two nitrogen atoms of the Amidinato chelate (Sn—N 217.2, 215.9 pm), by three chlorine atoms and by the nitrogen atom of the Acetonitrile molecule (Sn—N 244.0 pm).[Na-Benzo-15-Krone-5]2SnCl6 (2): Space group P21/C, Z = 2, 2585 observed unique reflexions, R = .032. Lattice dimensions at 19°C: a = 963.1; b = 946.6; c = 2082.6 pm; β = 101,79°. 2 centrosymmetric Ion triple with the tin atom of the SnCl62- unit in the symmetry center. The sodium ions are sevenfold coordinated by five oxygen atoms of the crown ether molecule, as well as by two chlorine atoms of the SnCl62- ions with Na…Cl bond length of 300.4 and 304.6 pm, respectively.
    Notes: Der Amidinatokomplex C6H4[C(NSiMe3)2SnCl3 · CH3CN]2 (1) wurde durch Reaktion von Zinntetrachlorid mit Hexakis(trimethylsilyl)-1,4-benzdiamidin in Gegenwart von Acetonitril hergestellt. 1 bildet farblose, feuchtigkeitsempfindliche Kristalle, die im Vakuum das koordinierte Acetonitril leicht abgeben. Mit Natriumflorid reagiert 1 in Acetonitrillösung in Gegenwart von Benzo-15-Krone-5 unter Bildung von [Na-Benzo-15-Krone-5]2SnCl6 (2). 1 und 2 werden durch ihre IR-Spektren und durch röntgenographische Kristallstrukturanalysen charakterisiert.C6H4[C(NSiMe3)2SnCl3 · CH3CN]2 (1): Raumgruppe P21/c, Z = 2, 1700 beobachtete unabhängige Reflexe, R = 4,5%. Die Gitterkonstanten bei 19 °C: a = 818,6; b = 1 838,2; c = 1 484,1 pm; β = 96,58°. 1 bildet monomere, zentrosymmetrische Moleküle mit den Amidinatogruppen in 1,4-Stellung des C6H4-Ringes. Die Zinnatome sind sechsfach koordiniert durch die beiden N-Atome des Amidinatochelats (Sn—N 217,2; 215,9 pm), durch drei Chloratome und durch das N-Atom des Acetonitrilmoleküls (Sn—N 244,0 pm).[Na-Benzo-15-Krone-5]2SnCl6 (2): Raumgruppe P21/c, Z = 2, 2585 beobachtete unabhängige Reflexe, R = 3,2%. Die Gitterkonstanten bei 19°C: a = 963,1; b = 946,6; c = 2082,6 pm; ° = 101,79°. 2 bildet zentrosymmetrische Ionentripel mit dem Zinnatom des SnCl62--Ions auf dem Symmetriezentrum. Die Natriumionen sind siebenfach koordiniert durch die fünf O-Atome der Kronenethermoleküle und durch zwei Cl-Atome des SnCl62--Anions mit Na…Cl-Abständen von 300,4 bzw. 304,6 pm.
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