ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
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
  • IR spectra  (4)
  • i.r. spectra  (3)
  • 1
    Electronic Resource
    Electronic Resource
    Die Kristallstrukturen von (NH4)2[ReCl6], [ReCl2(CH3CN)4]2[ReCl6] · 2CH3CN und [ReCl4(18-Krone-6)] (1995)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 525-530 
    Details
    ISSN: 0044-2313
    Keywords: Rhenium Complexes ; Syntheses ; IR spectra ; Crystal Structures ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Crystal Structures of (NH4)2[ReCl6], [ReCl2(CH3CN)4]2[ReCl6] · 2CH3CN and [ReCl4(18)(Crown-6)]Brown single crystals of (NH4)2[ReCl6] are formed by the reaction of NH4Cl with ReCl5 in a suspension of diethylether. [ReCl2(CH3CN)4]2[ReCl6] · 2CH3CN crystallizes as brown crystal plates from a solution of ReCl5 in acetonitrile. Lustrous green single crystals of [ReCl4(18-crown-6)] are obtained by the reaction of 18-crown-6 with ReCl5 in a dichloromethane suspension. All rhenium compounds are characterized by IR spectroscopy and by crystal structure determinations.(NH4)2[ReCl6]: Space group Fm3m, Z = 4, 75 observed unique reflections, R = 0.01. Lattice constant at -70°C: a = 989.0(1) pm. The compound crystallizes in the (NH4)2[PtCl6] type, the Re—Cl distance is 235.5(1) pm.[ReCl2(CH3CN)4]2[ReCl6] · 2CH3CN: Space group P1, Z = 1, 2459 observed unique reflections, R = 0.12. Lattice dimensions at -60°C: a = 859.0(1), b = 974.2(7), c = 1287.3(7) pm, α = 102.69(5)°, b̃ = 105.24(7)°, γ = 102.25(8)°. The structure consists of two symmetry-independent [ReCl2(CH3CN)4]+ ions with trans chlorine atoms, [ReCl6]2- ions, and included acetonitrile molecules. In the cations the Re—Cl bond lengths are 233 pm in average, in the anion they are 235 pm in average.[ReCl4(18-crown-6)]: Space group P21/n, Z = 4, 3 633 observed unique reflections, R = 0.06. Lattice dimensions at -70°C: a = 1040.2(4), b = 1794.7(5), c = 1090.0(5) pm, b̃ = 108.91(4)°. The compound forms a molecular structure, in which the rhenium atom is octahedrally coordinated by the four chlorine atoms and by two oxygen atoms of the crown ether molecule.
    Notes: Braune Einkristalle von (NH4)2[ReCl6] entstehen durch Reaktion von NH4Cl mit ReCl5 in einer Diethylethersuspension. [ReCl2(CH3CN)4]2[ReCl6] · 2CH3CN kristallisiert als braune Kristallplättchen aus einer Lösung von ReCl5 in Acetonitril. Leuchtend grüne Einkristalle von [ReCl4(18-Krone-6)] entstehen durch Reaktion von 18-Krone-6 mit ReCl5 in einer Dichlormethansuspension. Die drei Rhenium-Verbindungen werden durch ihre IR-Spektren und durch Kristallstrukturanalysen charakterisiert.(NH4)2[ReCl6]: Raumgruppe Fm3m, Z = 4, 75 unabhängige beobachtete Reflexe, R = 0,01. Gitterkonstante bei -70°C: a = 989,0(1) pm. Die Verbindung kristallisiert im (NH4)2[PtCl6]-Typ, der Re—Cl-Abstand beträgt 235,5(1) pm.[ReCl2(CH3CN)4]2[ReCl6] · 2CH3CN: Raumgruppe P1, Z = 1, 2459 beobachtete unabhängige Reflexe, R = 0,12. Gitterkonstanten bei -60°C: a = 859,0(1); b = 974,2(7); c = 1287,3(7) pm, α = 102,69(5)°; b̃ = 105,24(7)°; γ = 102,25(8)°. Die Struktur besteht aus zwei symmetrieunabhängigen [ReCl2(CH3CN)4]+-Ionen mit trans-ständigen Chloratomen, [ReCl6]2--Ionen und eingelagerten Acetonitrilmolekülen. In den Kationen betragen die Re—Cl-Abstände im Mittel 233 pm, im Anion im Mittel 235 pm.[ReCl4(18-Krone-6)]: Raumgruppe P21/n, Z = 4, 3 633 beobachtete unabhängige Reflexe, R = 0,06. Gitterkonstanten bei -70°C: a = 1040,2(4); b = 1794,7(5); c = 1090,0(5) pm; b̃ = 108,91(4)°. Die Verbindung bildet eine Molekülstruktur, in der das Rheniumatom oktaedrisch von den vier Chloratomen und von zwei Sauerstoffatomen des Kronenethers koordiniert ist.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19956210404
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Über die Kronenetherkomplexe [K(15-Krone-5)2]3[Sb3I12], [TeCl3(15-Krone-5)][TeCl5] und [TeCl3(15-Krone-5)]2[TeCl6] (1991)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 596 (1991), S. 55-61 
    Details
    ISSN: 0044-2313
    Keywords: Crown ether complexes ; tellurium ; antimony ; syntheses ; i.r. spectra ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Crown Ether Complexes [K(15-Crown-5)2]3[Sb3I12], [TeCl3(15-Crown-5)][TeCl5], and [TeCl3(15-Crown-5)]2[TeCl6]Orange-coloured crystals of [K(15-crown-5)2]3[Sb3I12] are formed in the reaction of potassium iodide with antimony triiodide and 15-crown-5 in acetonitrile solution. An X-ray structure determination reveals severe disorder of the crown ether molecules, which coordinate to the potassium atoms in a sandwich array; so only the [Sb3I12]3- ion and the potassium positions were ascertained. The anion is a centrosymmetric trimer (symmetry C2h), which can be understood as central SbI63- ion, coordinated by two SbI3 molecules. (Space group C2/m), Z = 2, 3263 observed, independent reflections, R = 0.06, lattice dimensions at 20°C: a = 2541.1 pm, b = 1441.7 pm, c = 1588.4 pm, β = 113.33°.The tellurium complexes [TeCl3(15-crown-5)] [TeCl5] and [TeCl3(15-crown-5)]2[TeCl6] are prepared by reaction of TeCl4 with 15-crown-5 in acetonitrile solution, forming yellow-green crystals sensitive to moisture. They are characterized by their i.r. spectra.
    Notes: Orange Kristalle [K(15-Krone-5)2]3[Sb3I12] entstehen durch Einwirkung von Kaliumiodid auf Antimontriiodid bei Anwesenheit von 15-Krone-5 in Acetonitrillösung. Wegen Fehlordnung der die Kaliumionen sandwichartig koordinierenden Kronenethermoleküle konnten röntgenogrpahisch in der Struktur nur das [Sb3I12]3--Ion sicher aufgeklärt werden. Es bildet ein zentrosymmetrisches Trimer (Symmetrie C2h), das sich als zentrales SbI63--Ion mit zwei koordinierten SbI3-Molekülen auffassen läßt. Raumgruppe C2/m, Z = 2, 3263 unabhängige beobachtete Reflexe, R = 6,2%. Gitterabmessungen bei 20 °C: a = 2541,1; b = 1441,7; c = 1588,4 pm, β = 113,33°.Die Tellurokomplexe [TeCl3(15-Krone-5)] [TeCl5] und [TeCl3(15-Krone-5)]2[TeCl6] entstehen aus TeCl4 und 15-Krone-5 in Acetonitrillösung als gelbgrüne, feuchtigkeitsempfindliche Kristalle, die durch ihre IR-Spektren charakterisiert werden.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19915960108
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Chalkogeno-Fluoro-Wolframate. Die Kristallstrukturen von [Na-15-Krone-5]2[WO2F3]2 · 2 2 CH3CN und [Na-15-Krone-5]2[WOSF3]2 · 2 CH3CNHerrn Professor Hanskarl Müller-Buschbaum zum 60. Geburtstage am 24. Mai 1991 gewidmet (1991)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 596 (1991), S. 121-132 
    Details
    ISSN: 0044-2313
    Keywords: Chalcogeno-fluorotungstates ; syntheses ; i.r. spectra ; crystal structures ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Chalcogeno-Fluoro-Tungstates. The crystal Structures of [Na-15-Crown-5]2[WO2F3]2 ·2 CH3CN and [Na-15-Crown-5]2[WOSF3]2 · 2 CH3CNThe reaction of sodium fluoride with WSCL4 in acetonitrile solution successively leads in the presence of 15-crown-5 to the complexes [Na-15-crown-5][WSCl4F], [Na-15-crown-5]2[WSCl2F3], and [Na-15-crown-5][WSF5]. These complexes are characterized by their i.r. spectra. In acetonitrile partial hydrolysis of [Na-15-crown-5][WSF5] leads to [Na-15-crown-5]2[WSOF3]2 · 2 CH3CN; likewise one obtains [Na-15-crown-5]2[WO2[WO2F3]2] · 2 CH3CN from [Na-15-crown-5]2[WSOF7] by partial hydrolysis. X-ray structural analyses were carried out for both these chalcogeno complexes. [Na-15-crown-5]2[WO2F3]2 · 2 CH3CN: space group P1, Z = 1, 2316 unique observed reflexions, R = 0.036. Lattice dimensions at -65°C: a = 851.0, b = 1064.6, c = 1130.2 pm, α = 105.18°, β = 95.12°, γ = 102.48°.[Na-15-crown-5]2[WOSF3]2 · 2 CH3CN: space group P1, Z = 1,2472 unique observed reflexions, R = 0.030. Lattice dimensions at -80°C: a = 856.3, b = 1062.8, c = 1181.1 pm, α = 107.68°, β = 95.52°, γ = 102.65°.Both compounds are isotypical with each other; they form ion triples which originate from two short Na…F-contacts of 232 pm each with the four axially arranged fluorine ligands of the dimeric anions [WO2F3]22- and [WSOF3]22-, respectively. The dimerization takes place via angular fluoro bridges with W—F-bondings which are only slightly differing in length. The chalcogeno ligands are in the trans-positions to the bridging fluorine atoms.
    Notes: Die Reaktion von Natriumfluorid mit WSCl4 in Acetonitrillösung führt in Gegenwart von 15-Krone-5 schrittweise zu den Komplexen [Na-15-Krone-5][WSCl4F], [Na-15-Krone-5][WSCl2F3] und [Na-15-Krone-5][WSF5], die durch ihre IR-Spektren charakterisiert werden. Partielle Hydrolyse von [Na-15-Krone-5][WSF5] führt in Acetonitril zu [Na-15-Krone-5]2[WSOF3]2 · 2 CH3CN, ebenso erhält man aus [Na-15-Krone-5][WF7] durch partielle Hydrolyse [Na-15-Krone-5]2[WO2F3]2 · 2 CH3CN. Von beiden Chalkogenokomplexen wurden röntgenographische Strukturanalysen ausgeführt.[Na-15-Krone-5]2[WO2F3]2 · 2 CH3CN: Raumgruppe P1, Z = 1, 2316 unabhängige beobachtete Reflexe, R = 3,6%. Gitterkonstanten bei -65°C: a = 851,0; b = 1064,6; c = 1130,2 pm; α = 105,18°; β = 95,12°; γ = 102,48°. [Na-15-Krone-5]2[WOSF3]2 · 2 CH3CN: Raumgruppe P1, Z = 1, 2472 unabhängige beobachtete Reflexe, R = 3,0%. Gitterkonstanten bei -0°C: a = 856,3; b = 1062,8; c = 1181,1 pm; α = 107,68°; β = 95,52°; γ = 102,65°.Beide Verbindungen sind miteinander isotyp; sie bilden Ionentripel, die durch je zwei kurze Na…F-Kontakte von 232 pm mit den vier axial angeordneten Fluorliganden der dimeren Anionen [WO2F3]22- bzw. [WSOF3]22- zustandekommen. Die Dimerisierung erfolgt über gewinkelte Fluorobrücken mit nur wenig verschieden langen W—F-Bindungen. Die Chalkogenoliganden befinden sich in den trans-Positionen zu den Brücken-F-Atomen.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19915960117
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Trimethylsilyl-substituierte Amidinatokomplexe von Thallium(III). Die Kristallstruktur von [Ph—C(NHSiMe3)2] [Ph—C(NSiMe3)2 TICI3]Herrn Professor Eberhard Hoyer zum 60. Geburtstage am 26. Mai 1991 gewidmet (1991)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 600 (1991), S. 7-14 
    Details
    ISSN: 0044-2313
    Keywords: Amidinato complexes of thallium(III) ; syntheses ; i.r. spectra ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Trimethylsilyl Substituted Amidinato Complexes of Thallium(III). The Crystal Structure of [Ph—C(NHSiMe3)2] [Ph—C(NSiMe3)2TlCl3]The amidinato complexes [Ph—C(NSiMe3)2TlCl3] and [Ph—C(NHSiMe3)2] [Ph—C(NSiMe3)2TlCl3] have been prepared by the reaction of TlCl3 with N,N,N′-tris(trimethylsilyl)benzamidine in THF solution. They were characterized by IR spectroscopy, [Ph—C(NHSiMe3)2] [Ph—C(NSiMe3)2TlCl3] additionally by an X-ray structure determination. Space group P21/c, Z = 4, 4300 observed unique reflexions, R = 0.053. Lattice dimensions at -43°C: a = 1157.2, b = 2346.3, c = 1536.9 pm, β = 105.98°. The structure consists of amidinium cations, and of anions [Ph—C(NSiMe3)2TlCl3]-, in which the thallium atom is fivefold surrounded by three chlorine atoms and by two nitrogen atoms of the amidinato chelate.
    Notes: Die Amidinatokomplexe [Ph—C(NHSiMe3)2TlCl2] und [Ph—C(NHSiMe3)2TlCl2] [Ph—C(NSiMe3)2TlCl3] entstehen bei der Einwirkung von Thallium(III)-chlorid auf N,N,N′-Tris(trimethylsilyl)benzamidin in Tetrahydrofuranlösung. Sie werden durch ihre IR-Spektren, und [Ph—C(NHSiMe3)2] [Ph—C(NSiMe3)2TlCl3] zusätzlich durch eine Kristallstrukturanalyse charakterisiert. Raumgruppe P21/c, Z = 4, 4300 unabhängige beobachtete Reflexe, R = 5,3%. Die Gitterkonstanten betragen bei -43°C: a = 1157,2; b = 2346,3; c = 1536,9 pm; β = 105,98°. Die Verbindung besteht aus einem Amidiniumkation und einem [Ph—C(NSiMe3)2TlCl3]--Anion, in dem das Thalliumatom verzerrt trigonal-bipyramidal von drei Cl-Atomen und chelatartig von den beiden N-Atomen des Amidinatoliganden umgeben ist.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19916000102
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    [Sb(12-Krone-4)2(CH3CN)][SbCl6]3 und [Bi(12-Krone-4)2(CH3CN)][SbCl6]3, die ersten Trikationen von Antimon(III) und Bismut(III)Professor Hartmut Bärnighausen zum 60. Geburtstage gewidmet (1993)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 619 (1993), S. 271-276 
    Details
    ISSN: 0044-2313
    Keywords: Crown ether complexes of Sb3+ and Bi3+ ; synthesis ; IR spectra ; 121Sb Mössbauer spectrum ; X-ray structures ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: [Sb(12-Crown-4)2(CH3CN)][SbCl6]3 and [Bi(12-Crown-4)2(CH3CN)][SbCl6]3, first Trications of Antimony(III) and Bismuth(III)The crown ether complexes [M(12-crown-4)2(CH3CN)][SbCl6]3 with M = Sb and Bi are formed by the reaction of antimony trichloride and bismuth trichloride, respectively, with antimony pentachloride in acetonitrile solution in the presence of 12-crown-4. They form colourless, moisture sensitive crystals, which were characterized by X-ray structure determinations and by IR spectroscopy. The complex with M = Sb was also characterized by 121Sb Mössbauer spectroscopy.Both complexes crystallize isotypically in the orthorhombic space group Pbcn with four formula units per unit cell.M = Sb: 3 483 observed unique reflections, R = 0.038. M = Bi: 2 958 observed unique reflections, R = 0.036. The compounds consist of SbCl6- ions and trications [M(12-crown-4)2(CH3CN)]3+, in which the M3+ ions are ninefold coordinated by the eight oxygen atoms of the crown ether molecules and by the nitrogen atom of the acetonitrile molecule. The lone pair of the M3+ ions has no steric effect.
    Notes: Die Kronenetherkomplexe [M(12-Krone-4)2(CH3CN)][SbCl6]3 mit M = Sb und Bi entstehen durch Reaktion von Antimontrichlorid bzw. Bismuttrichlorid mit Antimonpentachlorid in Acetonitrillösung in Gegenwart von 12-Krone-4. Sie bilden farblose, feuchtigkeitsempfindliche Kristalle, die wir durch kristallographische Strukturanalysen und durch die IR-Spektren charakterisiert haben. Von dem Komplex mit M = Sb wurde ein 121Sb-Mößbauer-Spektrum aufgenommen.Beide Komplexe kristallisieren isotyp in der orthorhombischen Raumgruppe Pbcn mit vier Formeleinheiten pro Elementarzelle. M = Sb: 3 483 beobachtete unabhängige Reflexe, R = 0,038. M = Bi: 2 958 beobachtete unabhängige Reflexe, R = 0,036. Die Verbindungen enthalten neben den SbCl6--Ionen Trikationen [M(12-Krone-4)2(CH3CN)]3+, in denen die M3+-Ionen durch die acht O-Atome der beiden Kronenethermoleküle und durch das N-Atom des Acetonitrilmoleküls neunfach koordiniert sind. Das freie Elektronenpaar an den M3+-Ionen bleibt ohne sterische Wirksamkeit.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19936190208
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Synthese und Kristallstrukturen der Phosphanimin-Komplexe MCl2(Me3SiNPMe3)2 mit M = Zn und Co, und CoCl2(HNPMe3)2 (1994)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 620 (1994), S. 431-437 
    Details
    ISSN: 0044-2313
    Keywords: Phosphaneimine Complexes of Zinc and Cobalt ; Synthesis ; IR spectra ; Crystal Structures ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Syntheses and Crystal Structures of the Phosphaneimine Complexes MCl2(Me3SiNPMe3)2 with M = Zn and Co, and CoCl2(HNPMe3)2The molecular complexes MCl2(Me3SiNPMe3)2 (M = Zn, Co) have been prepared by the reaction of the dichlorides of zinc and cobalt with Me3SiNPMe3 in CH3CN and CH2Cl2, respectively, whereas the complex CoCl2(HNPMe3)2 has been prepared by the reaction of CoCl2 with NaF in boiling acetonitrile in the presence of Me3SiNPMe3. All complexes were characterized by IR spectroscopy and by crystal structure determinations. The complexes MCl2(Me3SiNPMe3)2 crystallize isotypically.ZnCl2(Me3SiNPMe3)2: Space group P212121, Z = 4, 2677 observed unique reflections, R = 0.024. Lattice dimensions at -70°C: a = 1243.6; b = 1319.0; c = 1464.7 pm.CoCl2(Me3SiNPMe3)2: Space group P212121, Z = 4, 3963 observed unique reflections, R = 0,071. Lattice dimensions at -80°C: a = 1236.3; b = 1317.4; c = 1457.6 pm.CoCl2(HNPMe3)2 · CH2Cl2: Space group Pbca, Z = 8, 1354 observed unique reflections, R = 0.055. Lattice dimensions at -80°C: a = 1247.3; b = 998.4; c = 2882.4 pm.All complexes have monomeric molecular structures, in which the metal atoms are coordinated in a distorted tetrahedral fashion by the two chlorine atoms and by the nitrogen atoms of the phosphaneimine molecules.
    Notes: Die Molekülkomplexe MCl2(Me3SiNPMe3)2 (M = Zn, Co) entstehen aus den wasserfreien Dichloriden von Zink und Cobalt mit Trimethylsilyl-trimethylphosphanimin in Dichlormethan bzw. Acetonitril, während der Trimethylphosphanimin-Komplex CoCl2(HNPMe3)2 aus CoCl2 mit Natriumfluorid in Gegenwart von Me3SiNPMe3 in siedendem Acetonitril gebildet wird. Die Verbindungen werden durch ihre IR-Spektren und durch Kristallstrukturanalysen charakterisiert. Die Komplexe MCl2(Me3SiNPMe3)2 (M = Zn, Co) sind miteinander isotyp.ZnCl2(Me3SiNPMe3)2: Raumgruppe P212121, Z = 4, Strukturlösung mit 2677 beobachteten unabhängigen Reflexen, R = 0,024. Gitterkonstanten bei -70°C: a = 1243,6; b = 1319,0; c = 1464,7 pm.CoCl2(Me3SiNPMe3)2: Raumgruppe P212121, Z = 4, Strukturlösung mit 3963 beobachteten unabhängigen Reflexen, R = 0,071. Gitterkonstanten bei -80°C: a = 1236,3; b = 1317,4; c = 1457,6 pm.CoCl2(HNPMe3)2 · CH2Cl2: Raumgruppe Pbca, Z = 8, Strukturlösung mit 1354 beobachteten unabhängigen Reflexen, R = 0,055. Gitterkonstanten bei -80°C: a = 1247,3; b = 998,4; c = 2882,4 pm.Alle Komplexe haben monomere Molekülstrukturen, in denen die Metallatome verzerrt tetraedrisch von den beiden Chloratomen und den N-Atomen der beiden Phosphaniminmoleküle koordiniert sind.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19946200305
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Funktionalisierte Alkinkomplexe von Wolfram(VI). Synthese und Kristallstrukturen von [WCl4(Et—Se—C≡C—Se—Et)(THF)] und [WCl4(Et—Te—C≡C—Te—Et)(THF)]Professor Gerhard Fritz zum 75. Geburtstag gewidmet (1995)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 388-392 
    Details
    ISSN: 0044-2313
    Keywords: Functionalized Alkyne Complexes of Tungsten ; Synthesis ; IR spectra ; Crystal Structures ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Functionalized Alkyne Complexes of Tungsten(VI). Syntheses and Crystal Structures of [WCl4(Et—Se—C≡C—Se—Et)(THF)] and [WCl4(Et—Te—C≡C—Te—Et)(THF)]The title compounds have been prepared by reactions of [WCl4(SEt2)2] with the alkynes Et—X—C≡C—X—Et (X = Se, Te) in CCl4 solution and subsequent addition of tetrahydrofurane. Both complexes were characterized by crystal structure determinations.[WCl4(Et—Se—C≡C—Se—Et)(THF)]: Space group P21/n, Z = 4, structure determination with 2942 unique reflections, R = 0.038. Lattice dimensions at 20°C: a = 934.2, b = 1639.5, c = 1189.5 pm, β = 96.497°.[WCl4(Et—Te—C≡C—Te—Et)(THF)]: Space group P21/n, Z = 4, structure determination with 4097 unique reflections, R = 0.067, Lattice dimensions at -70°C: a = 899.2, b = 1691.9, c = 1213.3 pm, β = 96.82°.The complexes have monomeric molecular structures with the oxygen atom of the THF molecules in trans-position to the side-on bound alkyne ligands.
    Notes: Die Titelverbindungen werden aus [WCl4(SEt2)2] und den Alkinen Et—X—C≡C—X—Et (X = Se, Te) in CCl4-Lösung nach Zusatz von Tetrahydrofuran erhalten und durch Kristallstrukturanalysen charakterisiert.[WCl4(Et—Se—C≡C—Se—Et)(THF)]: Raumgruppe P21/n, Z = 4, Strukturverfeinerung mit 2942 unabhängigen Reflexen, R = 0,038. Gitterabmessungen bei 20°C: a = 934,2; b = 1639,5; c = 1189,5 pm, β = 96,497°.[WCl4(Et—Te—C≡C—Te—Et)(THF)]: Raumgruppe P21/n, Z = 4, Strukturverfeinerung mit 4097 unabhängigen Reflexen, R = 0,067. Gitterabmessungen bei -70°C: a = 899,2; b = 1691,9; c = 1213,3 pm, β = 96,82°.Beide Verbindungen haben monomere Molekülstrukturen, in denen sich das O-Atom des THF-Moleküls in trans-Position zum seitlich gebundenen Alkinliganden befindet.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19956210308
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...