Your email was sent successfully. Check your inbox.

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

Proceed reservation?

Export
Filter
  • Chemistry  (13)
  • (tBu2P)2P—SiMe3  (1)
  • 1H, 31P, 7Li-NMR spectra  (1)
  • Industrial Chemistry  (1)
  • Li(THF)2[η2-(Et2N)2P—P—PtBu2]  (1)
  • 1
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Preparation of CH3SCN · MF5 Adducts (M = As, Sb) and Crystal Structure of CH3SCN · AsF5The preparation and spectroscopic characterization of CH3SCN · MF5 M = As, Sb is reported. X-Ray structure analysis shows that the adduct CH3SCN · AsF5 is N coordinated. It crystallizes in the monoclinic space group P21/m (Nr. 11) with a = 537.07(6) pm, b = 755.28(10) pm, c = 863.19(10) pm, β = 91.81(1)°, Z = 2. The geometric parameters correspond to the expected values.
    Notes: Es wird über die Darstellung von CH3SCN · MF5 (M = As, Sb) und ihre spektroskopische Charakterisierung berichtet. Nach einer Strukturanalyse durch Röntgenbeugung ist das Addukt CH3SCN · AsF5 über N koordiniert und kristallisiert in der monoklinen Raumgruppe P21/m (Nr. 11) mit a = 537,07(6) pm, b = 755,28(10) pm, c = 863,19(10) pm, β = 91,81(1)°, und Z = 2. Die Geometrieparameter entsprechen den Erwartungen.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 605 (1991), S. 109-116 
    ISSN: 0044-2313
    Keywords: Antimony(III)fluoride,(Sb2F5+)(Sb3F72+)(SbF6-)3 ; preparation ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Crystal Structure of a new Modification of Sb8F30The modification of Sb8F30, described here, crystallizes in the orthorhombic space group Pca21 (No. 29) with a = 1115.7(1), b = 1100.2(1), c = 1917.8(3) pm and Z = 4. Within this complex molecule, the Sb3F72+-cation was identified besides a heavily distorted form of the mixed valent Sb4F17--anion.
    Notes: Die hier beschriebene Modifikation von Sb8F30 kristallisiert in der orthorhombischen Raumgruppe Pca21 (Nr. 29) mit a = 1115,7(1), b = 1100,2(1), c = 1917,8(3) pm und Z = 4. Innerhalb dieses komplexen Moleküls werden ein Sb3F72+-Kation und eine stark verzerrte Form des gemischt valenten Sb4F17--Anions identifiziert.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 620 (1994), S. 1818-1820 
    ISSN: 0044-2313
    Keywords: Crystal structure of tBu2P—P=P(Br)tBu2 ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Crystal Structure of tBu2P—P=P(Br)tBu2tBu2P—P=P(Br)tBu2 1 crystallizes in the monoclinic space group P21/c with a = 2 888.9(3), b = 972.16(10), c = 1 534.04(14) pm, β = 105.129(8)° and 8 formula units in the unit cell. The two independent P3-units in 1 form angles of 105.77° or 105.98°, resp. One P—P distance (220,4 pm) corresponds to a single bond, the other one (207.9 pm) to a double bond.
    Notes: tBu2P—P=P(Br)tBu2 1 kristallisiert monoklin in der Raumgruppe P21/c mit a = 2 888,9(3), b = 972,16(10), c = 1 534,04(14) pm, β = 105,129(8)° und 8 Formeleinheiten in der Elementarzelle. Die beiden unabhängigen P3-Einheiten in 1 sind gewinkelt (105,77° bzw. 105,98°). Die P—P-Abstände entsprechen mit 220,4 pm einer Einfachbindung bzw. mit 207,9 pm einer Doppelbindung.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 4
    ISSN: 0044-2313
    Keywords: Oxomolybdates ; X-Ray Crystal Structure ; Twinning ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Crystal Structures of Two Forms of In5Mo18O28 and TwinningIn5Mo18O28 is prepared from In, Mo and MoO2 at 1 150°C in an evacuated quartz glass ampoule. X-ray investigations on single crystals show monoclinic symmetry (a = 1 323.13(9), b = 951.88(10), c = 989.48(8) pm, β = 100.976(4)°, space group P 21/c (No. 14)) for form 1. The second form (2) crystallizes in the orthorhombic system (space group Pmcn (No. 62), a = 2 596.6(5), b = 952.0(2), c = 989.6(2) pm). Twinning and charge balances are discussed.
    Notes: Beim Tempern von Indium mit Molybdän und Molybdändioxid in verschlossenen Quarzglasampullen bei 1 150°C erhält man die Verbindung In5Mo18O28. Untersuchungen an Einkristallen ergeben für die Modifikation 1 eine monokline Struktur (a = 1 323,13(9), b = 951,88(10), c = 989,48(8) pm, β = 100,976(4)°, Raumgruppe P 21/c (Nr. 14)). Die zweite Modifikation (2) kristallisiert orthorhombisch in der Raumgruppe Pmcn (Nr. 62, a = 2 596,6(5), b = 952,0(2), c = 989,6(2) pm). Zwillingsbildung und Ladungsbilanzen werden diskutiert.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 5
    ISSN: 0044-2313
    Keywords: Li(THF)2[η2-(tBu2P)2P] ; Li(TMEDA)[η2-(tBu2P)2P] ; Li(THF)2[η2-(iPr2P)2P] ; Li(THF)2[η2-(Et2N)2P—P—PtBu2] ; Li(THF)2[η2-(tBu2P—P—PiPr2)] ; (tBu2P)2P—SiMe3 ; crystal structures ; 1H, 31P, 7Li-NMR spectra ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Formation and Structure of Li(THF)2[η2-(tBu2P)2P], Li(TMEDA)[η2-(tBu2P)2P], Li(THF)2[η2-(iPr2P)2P], Li(THF)2[η2-(Et2N)2P—P—PtBu2], Li(THF)2[η2-(tBu2P—P—PiPr2] and (tBu2P)2P—SiMe3The formation and crystal structures of the compounds (tBu2P)2P—SiMe3 1, Li(THF)2[η2-(tBu2P)2P] 2, Li(TMEDA)[η2-(tBu2P)2P] 3, Li(THF)2[η2-(iPr2P)2P] 4, Li(THF)2[η2-(Et2N)2P—P—PtBu2] 5 and Li(THF)2[η2-(tBu2P—P—PiPr2)] 6 are reported. Compounds 3-6 are formed by reacting the corresponding silylated triphosphanes with nBuLi: 2 and 3 result from (tBu2P)2P—SiMe3 1, 4 from (iPrP)2P—SiMe3, 5 from (Et2N)2P—P(SiMe3)—PtBu2 and 6 from tBu2P—P(SiMe3)—PiPr2. 1 crystallizes in the orthorhombic space group P212121 (no. 19) with a = 910.87(7) pm, b = 1132.5(1) pm, c = 2373.5(2) pm (determined at 90 K). The structure determination of 2 was performed at 293 K and 200 K, respectively. 2 crystallizes in the monoclinic space group P21/n (no. 14) with a = 1069.7(3) pm, b = 1802.5(3) pm, c = 1604.0(7) pm, β = 98.11(2)° (200 K); 3 also in P21/n (no. 14) with a = 904.3(2) pm, b = 1936.4(5) pm, c = 1653.2(3) pm, β = 94.52(1)° (200 K). 4 crystallizes monoclinically in C2/c (no. 15) with a = 1650.0(5) pm, b = 945.6(3) pm, c = 1779.8(5) pm, β = 108.81(2)° (200 K); 5 in P21/n (no. 14) with a = 939.4(5) pm, b = 1736.8(6) pm, c = 1943.3(7) pm, β = 98.17(4)° (200 K). All compounds contain Z = 4 molecules in the unit cell.The 1H, 31P and 7Li NMR spectra of 2-6 are discussed.
    Notes: Es wird über die Verbindungen (tBu2P)2P—SiMe3 1, Li(THF)2[η2-(tBu2P)2P] 2, Li(TMEDA) · [η2-(tBu2P)2P] 3, Li(THF)2[η2-(iPr2P)2P] 4, Li(THF)2[η2-(Et2N)2P—P—PtBu2] 5 und Li(THF)2[η2-(tBu2P—P—PiPr2)] 6 berichtet. Letztere bilden sich durch Umsetzung der entsprechenden silylierten Triphosphane mit nBuLi: 2 und 3 aus (tBu2P)2P—SiMe3 1, 4 aus (iPr2P)2P—SiMe3, 5 aus (Et2N)2—P · (SiMe3)—PtBu2, 6 aus tBu2P—P(SiMe3)—PiPr2.1 kristallisiert orthorhombisch in P212121 (Nr. 19) mit a = 910,87(7) pm, b = 1132,5(1) pm, c = 2373,5(2) pm (bei 90 K bestimmt). Die Strukturbestimmung von 2 erfolgte bei 293 K und 200 K. 2 kristallisiert monoklin in P21/n (Nr. 14) mit a = 1069,7(3) pm, b = 1802,5(3) pm, c = 1604,0(7) pm, β = 98,11(2)° (200 K), 3 ebenfalls in P21/n (Nr. 14) mit a = 904,3(2) pm, b = 1936,4(5) pm, c = 1653,2(3) pm, β = 94,52(1)° (200 K). 4 kristallisiert monoklin in C2/c (Nr. 15) mit a = 1650,0(5) pm, b = 945,6(3) pm, c = 1779,8(5) pm, β = 108,81(2)° (200K), 5 in P21/n (Nr. 14) mit a = 939,4(5) pm, b = 1736,8(6) pm, c = 1943,3(7) pm, β = 98,17(4)° (200 K). Alle fünf Verbindungen enthalten jeweils vier Formeleinheiten in der Elementarzelle.Es wird über die Untersuchung der 1H-, 31P- und 7Li-NMR-Spektren der Verbindungen 2-6 berichtet.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 6
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Phosphorus(III) Thiohalides: Sd=P—F and S=P—Br. Mass Spectrometric InvestigationsThe compounds S=P—F and S=P—Br are formed by reaction of P(S)FBr2 and P(S)Br3, respectively, with silver at temperatures of about 800 K. S=P—Br is also formed by pyrolysis of P(S)Br3 at temperatures above 298 K. Mass spectrometric equilibrium measurements lead to the heat of formation of S=P—F: ΔH°298(SPFg) = -260.8 kJ/mol.
    Notes: Die Homologen der Thiazylhalogenide, S=P—F und S=P—Br, entstehen bei ber Reduktion von P(S)FBr2 bzw. P(S)Br3 mit elementarem Silber bei Temperaturen um 800 K. Zu S=P—Br gelangt man ebenfalls durch Thermolyse von P(S)Br3 bei Temperaturen wenig oberhalb Zimmertemperatur. Aus massenspektrometrischen Untersuchungen der Gleichgewichtslage wurde für S=P—F eine Bildungsenthalpie von -260,8 kJ/mol abgeleitet.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 7
    ISSN: 0044-2313
    Keywords: Copper Molybdate ; Phase Investigation ; Crystal Structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Structure and Properties of CuxMoO3Cu0.185MoO3 was found in the coexistence range MoO3—Cu4Mo5O17—MoO2. The structure was determined by X-ray diffraction on selected monocrystals. The compound crystallizes in the monoclinic space group C2/c (a = 1 668.8(3), b = 932.2(3), c = 543.1(2) pm, β = 102,78(1)°, Z = 2).
    Notes: Cu0,185MoO3 wurde im Koexistenzgebiet MoO3—Cu4Mo5O17—MoO2 nachgewiesen. Die Strukturbestimmung erfolgte durch Röntgenbeugung an ausgelesenen Einkristallen. Cu0,185MoO3 kristallisiert in der monoklinen Raumgruppe C2/c (a = 1 668,8(3), b = 932,2(3), c = 543,1(2) pm, β = 102,78(1)°, Z = 2).
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
  • 8
    ISSN: 0044-2313
    Keywords: Phoshinophosphinidene-phosphoranes, tBu2P—P=P(Me)tBu2, tBu(Me3Si)P—P=P(Me)tBu2, tBu2P—P=P(Br)tBu2 ; Synthesis ; Structures ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Structure of Phosphinophosphinidene-phosphoranes tBu2P—P=P(Me)tBu2 1, tBu(Me3Si)P—P=P(Me)tBu2 2, and tBu2P—P=P(Br)tBu2 3A new method for the synthesis of 1 and 2 (Formulae see „Inhaltsübersicht“) is reported based on the reaction of 5 with substitution reagents (Me2SO4 or CH3Cl). The results of the X-ray structure determination of 1 and 2 are given and compared with those of 3. While in 3 one P—P distance corresponds to a double bond and the other P—P distance to a single bond (difference 12.5 pm) the differences of the P—P distances in 1 and 2 are much smaller: 5.28 pm in 1, 4.68 pm in 2. Both 1 and 2 crystallize monoclinic in the space group P21/n (Z = 4). 2 additionally contains two disordered molecules of the solvent pentane in the unit cell. Parameters of 1: a = 884.32(8) pm, b = 1 924.67(25) pm, c = 1 277.07(13) pm, β = 100.816(8)°, and of 2: a = 1 101.93(12) pm, b = 1 712.46(18) pm, c = 1 395.81(12) pm, β = 111.159(7)°, all data collected at 143 K. The skeleton of the three P atoms is bent (PPP angle 100.95° for 1, 100.29° for 2 and 105.77° for 3). Ab initio SCF calculations are used to discuss the bonding situation in the molecular skeleton of the three P atoms of 1 and 3. The results show a significant contribution of the ionic structure R2P—P(-)—P(+)(X)R2. The structure with (partially) charged P atoms is stabilized by bulky polarizable groups R (as tBu) as compared to the fully covalent structure R2P—P(X)—PR2.
    Notes: Es wird ein neuer Weg zur Bildung von tBu2P—P=P(Me)tBu2 1 und tBu(Me3Si)P—P=P(Me)tBu2 2 mitgeteilt, der auf der Umsetzung von LiP[P(tBu)2]2 5 mit Substitutionsreagenzien (Me2SO4, CH3Cl) basiert. Die Ergebnisse der Kristallstrukturuntersuchung von 1 und 2 werden mitgeteilt und mit denen des tBu2P—P=P(Br)tBu2 3 verglichen. Während in 3 der eine Abstand einer Doppelbindung entspricht und der andere einer Einfachbindung (Differenz 12,5 pm) sind die Differenzen der P—P-Abstände in 1 und 2 weit geringer, in 1 5,28 pm, in 2 4,68 pm. 1 und 2 kristallisieren beide monoklin in der Raumgruppe P21/n mit vier Formeleinheiten in der Elementarzelle. Bei 2 werden zusätzlich zwei fehlgeordnete Moleküle des Lösungsmittels Pentan in der Elementarzelle eingebaut. Parameter von 1: a = 884,32(8) pm, b = 1 924,67(25) pm, c = 1 277,07(13) pm, β = 100,816(8)°, 2: a = 1 101,93(12) pm, b = 1 712,46(18) pm, c = 1 395,81(12) pm, β = 111,159(7)°, jeweils bei der Meßtemperatur 143 K. Das Gerüst der drei P-Atome ist gewinkelt, Winkel in 1 100,95°, in 2 100,29° und in 3 auf 105,77° aufgeweitert. Mit Hilfe von ab initio SCF-Rechnungen werden die Bindungsverhältnisse im Molekülgerüst der drei P-Atome in 1 und 3 diskutiert. Es zeigt sich ein deutlicher Beitrag der ionogenen Struktur R2P—P(-)—P(+)(X)R2. Die Struktur mit separierten (Teil-)Ladungen wird durch große, polarisierte Gruppen R wie tBu im Vergleich zur (unpolaren) normalvalenten Verbindung R2P—P(X)—PR2 stabilisiert.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    Signatur 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: Fluoro Substituted and other New CarbodiphosphoranesSyntheses and properties of the carbodiphosphoranes [(CH3)2N]3P=C=P(CH3)[N(CH3) 2]2, (3), [(CH3)2N]2(F)P=C=P(F) [N(CH3)2]2, (7), and (C6H5)2(F)P=C=P(F)(C6H5) 2, (11), are discribed. The compounds 3, 7, and 11 as well as [(C2H5)2N]3P=C=P(CH3) [(C2H5)2N]2 are characterized by their 1H, 13C, 19F, and 31P n.m.r. and mass spectra. The crystal and molecular structures of 7 are reported.
    Notes: Synthese und Eigenschaften der Carbodiphosphorane [(CH3)2N]3P=C=P(CH3)[N(CH3)2]2, (3), [(CH3)2N]2(F)P=C=P(F)[N(CH3)2]2, (7), und (C6H5)2(F)P=C=P(F)(C6H5) 2, (11), werden beschrieben. Die Verbindungen 3, 7 und 11 sowie [(C2H5)2N]3P=C= P(CH3)[(C2H5)2N]2 sind durch ihre 1H-, 13C-, 19F- und 31P-NMR-Spektren sowie durch ihre Massenspektren charakterisiert. Die Kristall- und Molekülstruktur von 7 werden mitgeteilt.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    Signatur 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: Contributions to the Chemistry of Organo Transition Metal Compounds. 55. Preparation and Properties of Niobocenium and Tantalocenium Salts  -  Crystal and Molecular Structure of [(C5H5)2NbCl2][BF4] · CH3CNNiobocenium and tantalocenium compounds of the type [(C5H5)2MCl2]X (X = BF4, PBh4, PF6) were synthesized from the metallocene dichlorides and ferricenium salts, [(C5H5)2Fe]X, in methylene dichloride or tetrahydrofuran. With acetonitrile as solvent [(C5H5)2MCl2]X · CH3CN complexes are formed. Stable methyl compounds of the type [(C5H5)2M(CH3)2]X were obtained, when (C5H5)2Ta(CH3)2 is oxidized by means of ferricenium salts. The new complexes were characterized by elemental analysis, i. r., and 1H n.m.r. spectra. The structure of [(C5H5)2NbCl2][BF4] · CH3CN has been determined by X-ray structure analysis. The compound crystallizes in the orthorhombic space group Cmcm with a = 8.324(12), b = 19.581(13), c = 9,563(8) Å and Z = 4. The coordination geometry of the Nb atom is tetrahedrally.
    Notes: Niobocenium- und Tantalocenium-Verbindungen des Typs [(C5H5)2MCl2]X (X = BF4, PF6, BPh4) wurden aus den Metallocendichloriden und Ferricenium-Salzen, [(C5H5)2Fe]X, in Methylenchlorid bzw. Tetrahydrofuran als Reaktionsmedium erhalten. Bei Verwendung von Acetonitril entstanden Verbindungen des Typs [(C5H5)2MCl2]X · CH3CN (X = BF4, PF6). Durch Oxydation von (C5H5)2Ta(CH3)2 mit Ferricenium-Salzen waren stabile Komplexe der Zusammensetzung [(C5H5)2Ta(CH3)2]X zugängig.  -  Die dargestellten Verbindungen wurden charakterisiert durch Elementaranalysen sowie IR- und 1H-NMR-Spektren. Die Struktur der Verbindung [(C5H5)2NbCl2][BF4] · CH3CN wurde durch Röntgenkristallstrukturanalyse bestimmt. Die Verbindung kristallisiert orthorhombisch in der Raumgruppe Cmcm mit den Gitterkonstanten a = 8,324(12), b = 19,581(13), c = 9,563(8) Å und Z = 4. Die Koordinationsgeometrie des Nb-Atoms ist tetraedrisch.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    Signatur Availability
    BibTip Others were also interested in ...
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...