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  • Articles: DFG German National Licenses  (11)
  • X-ray structure  (6)
  • 2H-Azaphosphirene complexes  (5)
  • Tungsten  (4)
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  • Articles: DFG German National Licenses  (11)
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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 1998 (1998), S. 575-578 
    ISSN: 1434-1948
    Keywords: Phosphorus heterocycles ; 2H-Azaphosphirene complexes ; Carbene complexes ; Tungsten ; Cyclizations ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The syntheses of 3-heteroaryl-substituted 2H-azaphosphirene pentacarbonyltungsten complexes are reported. The products were characterized by multinuclear NMR spectroscopy (1H, 13C, 15N, 31P, 183W); the structure of the 3-N-methylpyrryl-substituted 2H-azaphosphirene complex was determined by single-crystal X-ray structure analysis.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1434-1948
    Keywords: Phosphorus heterocycles ; 2H-Azaphosphirene complexes ; Water-soluble P ligands ; Tungsten ; Cyclizations ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Thermal ring-opening of [{2-bis(trimethylsilyl)methyl-3- phenyl-2H-azaphosphirene-ĸP}pentacarbonyltungsten(0)] (8a) in the presence of dimethyl acetylenedicarboxylate (DMAD) led to the 2,3-bifunctionalized 1H-phosphirene complex 9a and the 4-phenyl-substituted 2H-1,2-azaphosphole complex 10a, the latter as a by-product. If a small amount of benzonitrile was added, complex 10a was obtained as the main product, along with a small amount of the decomplexed 2H-1,2-azaphosphole 11, which could not be isolated. Reaction of complex 10a with elemental sulfur furnished the corresponding PV sulfide 13. When the ring-opening of complex 8a was performed in the presence of two equivalents of DMAD and two equivalents of dimethyl cyanamide, we obtained the 4-dimethylamino-substituted 2H-1,2-azaphosphole complex 10b, together with the diastereomeric Δ3-1,3,2-oxazaphospholene complexes 14a,b. On reaction of [{2-pentamethylcyclopentadienyl-3-phenyl-2H-azaphosphirene-ĸP}pentacarbonyltungsten(0)] (8b) and DMAD in toluene, the corresponding 1H-phosphirene complex 9b was only formed as a transient species and the P-coordinated P,C-cage compound 15 was the final product. Using benzonitrile as solvent, the 4-phenyl-substituted 2H-1,2-azaphosphole complex 10c was obtained, together with the 7-aza-1-phosphanorbornadiene complex 16, the latter through partial decomposition of 10c coupled with rearrangement and a Diels-Alder reaction; the ratio 10c/16 was found to depend strongly on the molar ratio of complex 8b to DMAD. A cycloaddition reaction of the 2,3-bifunctionalized 1H-phosphirene complex 9a with 2,3-dimethylbutadiene furnished the bicyclic phosphirane complex 19, along with a small amount of the noncoordinated bicyclic phosphirane 20. Reaction of complex 9a with diethylamine yielded the phosphirane complex 21 as a 1,2-addition product, the diorganophosphane complex 22 through ring-opening of 9a, and the 3,4-functionalized 1,2-dihydro-1-phosphet-2-one complex 23 through an unprecedented ring-expansion reaction; the products 21, 22, 23 were formed in a ratio of ca. 1:1:1. The structures of the 1H-phosphirene complex 9a, the 4-dimethylamino-substituted 2H-1,2-azaphosphole complex 10b, the bicyclic phosphirane complex 19, the phosphirane complex 21, and the 1,2-dihydro-1-phosphet-2-one complex 23 have been determined by single-crystal X-ray diffraction analysis.
    Additional Material: 4 Ill.
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 1998 (1998), S. 257-261 
    ISSN: 1434-1948
    Keywords: Phosphorus heterocycles ; 2H-Azaphosphirene complexes ; Carbene complexes ; Tungsten ; Cyclizations ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: High-yield synthesis of para-substituted pentacarbonyl(3-phenyl-2H-azaphosphirene)tungsten complexes is reported, using a multi-step rearrangement reaction. Spectroscopic and mass-spectrometric data of these heterocyclic complexes are discussed; the 31P-NMR-chemical shifts clearly reflect the electronic influence of the para-phenyl substituents and the correlation with Hammett σp-constants is almost linear.
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 1998 (1998), S. 571-574 
    ISSN: 1434-1948
    Keywords: Phosphorus heterocycles ; 2H-Azaphosphirene complexes ; Carbene complexes ; Chromium ; Molybdenum ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The synthesis of 3-phenyl-substituted 2H-azaphosphirene pentacarbonylchromium and pentacarbonylmolybdenum complexes is reported. New information on the rearrangement cascade, which finally leads to 2H-azaphosphirene ring formation, has been obtained through isolation of a reactive intermediate. A comparison of the 13C-, 15N-, 31P-NMR, and UV/vis spectroscopic data and single crystal X-ray structural data of 3-phenyl-substituted 2H-azaphosphirene chromium, molybdenum, and tungsten complexes is presented.
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  • 5
    ISSN: 1434-1948
    Keywords: Carbene complexes ; Tungsten ; Phosphorus ; 2H-Azaphosphirene complexes ; Cyclization ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The first syntheses of pentacarbonyl[2-(pentamethyl-2,4-cyclopentadien-1-yl)-2H-azaphosphirene]tungsten complexes are reported, using a one-pot reaction of dichloro(pentamethyl-2,4-cyclopentadien-1-yl)phosphane (Cp*PCl2) with triethylamine and {[amino(aryl)carbene]pentcarbonyltungsten(0)}. [Pentamethyl-2,4-cyclopentadien-1-yl]phosphanediyl-bridged dinuclear carbene complexes are formed as long-lived intermediates, which, by elimination and rearrangement reactions, led to the final products. If traces of water were present, then by-products were formed; in one case, a dinuclear carbene complex with a P(Cp*)-O-P(Cp*) bridging unit was isolated. Under ordinary reaction conditions 2H-azaphosphirene complexes are slowly transformed into {pentacarbonyl[chloro(pentamethyl-2,4-cyclopentadien-1-yl)phosphane]tungsten(0)}. NMR-spectroscopic and single-crystal X-ray structural data of some dinuclear carbene complexes and 2-(pentamethyl-2,4-cyclopentadien-1-yl)-2H-azaphosphirene complexes are presented.
    Additional Material: 6 Ill.
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  • 6
    ISSN: 0044-2313
    Keywords: sulfenamides ; phosphorus ; pentacoordinated ; X-ray structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reaktionen von Sulfenamiden mit Verbindungen des dreiwertigen PhosphorsChlor-dimethylamino-phenyl-p-tolylthio-phosphoniumchlorid 2, Dimethylamino-diphenyl-p-tolylthio-phosphoniumchlorid 3, Bis(diethylamino)-dimethylamino-p-tolylthiophosphoniumchlorid 4 und tert-Butyl-dimethylaminophenyl-p-tolylthiophosphonium-chlorid 5 wurden durch Umsetzung von N,N-Dimethylamino-p-tolylsulfenamid 1 mit PhPCl2, Ph2PCl, (Et2N)2PCl und tBu(Ph)PCl erhalten. Die Reaktion von N,N′-Dimethyl-N,N′-bis(trimethylsilyl)harnstoff 9 und N-Methyl-N′-phenyl-N,N′-bis(trimethylsilyl)harnstoff 10 mit Phenylsulfenylchlorid 6 oder p-Nitrophenylsulfenyl-chlorid 8 ergab die N-Arylthio-N,N′-diorgano-N′-(trimethylsilyl)harnstoffe 11 - 14. Die Umsetzung von 11 - 14 und der bereits bekannten Verbindungen 15 und 16 mit MePCl2, ClCH2PCl2, tBuPCl2 und PhPCl2 führte zur Bildung der 2-(Arylthio)-2-chlor-1,2,3-triorgano-1,3,2λ5-diazaphosphetidin-4-one17 - 26. 1,3-Dimethyl-2-(1,1,1,3,3,3-hexafluor-2-propoxy)-2-phenyl-2-phenylthio-1,3,2λ5-diazaphosphetidin-4-on 29 und die 2-Arylthio-1,3-dimethyl-2-(p-nitrophenoxy)-2-organyl-1,3,2λ5-diazaphosphetidin-4-one 30 - 32 wurden durch Umsetzung der Verbindungen 17, 24 und 27 mit 1,1,1,3,3,3-Hexafluor-2-propanol oder p-Nitrophenol in Anwesenheit von Triethylamin dargestellt. Die Reaktion von 21 mit Thiophenol in Anwesenheit von Triethylamin ergab ein Produktgemisch, aus dem das Spirophosphoran 1,3,4,5,7-Pentamethyl-1,3,5,7-tetraaza-4λ5-phosphaspiro[3.3]heptan-2,6-dion 33 isoliert werden konnte. Identität und Struktur aller neuen Verbindungen wurden durch 1H-, 13C- and 31P-NMR-Spektroskopie und durch Elementaranalyse nachgewiesen. Ein möglicher Mechanismus für die Reaktion von Sulfenamiden mit Verbindungen des dreiwertigen Phosphors wird diskutiert. Für die Verbindungen 5a, 32 und 33 wurden Einkristall-Röntgenstrukturanalysen durchgeführt. Das Kation der Verbindung 5a enthält vierfach-koordinierten Phosphor (nahezu tetraedrische Geometrie) und stellt ein seltenes Beispiel einer P-S-Einfachbindung in einem solchen System dar (P-S 207,37(9) pm). In 32 ist die Geometrie am Phosphor verzerrt trigonal bipyramidal, wobei die axialen Lagen durch Sauerstoff- und Stickstoffatome besetzt sind. Im Spirophosphoran 33 liegt die Geometrie am Phosphor zwischen trigonal bipyramidal und quadratisch pyramidal, mit nahezu planaren Vierringen.
    Notes: Chloro-dimethylamino-phenyl-p-tolylthio-phosphonium chloride 2, dimethylamino-diphenyl-p-tolylthio-phosphonium chloride 3, bis(diethylamino)-dimethylamino-p-tolylthiophosphonium chloride 4 and tert-butyl-dimethylamino-phenyl-p-tolylthio-phosphonium chloride 5 were prepared by the reaction of N,N-dimethylamino-p-tolylsulfenamide 1 with PhPCl2, Ph2PCl, (Et2N)2PCl and tBu(Ph)PCl, respectively. The reaction of N,N′-dimethyl-N,N′-bis(trimethylsilyl)urea 9 and N-methyl-N′-phenyl-N,N′-bis(trimethylsilyl)urea 10 with phenylsulfenyl chloride 6 or p-nitrophenylsulfenyl chloride 8 furnished the N-arylthio-N,N′-diorgano-N′-(trimethylsilyl)-ureas 11 - 14. The reaction of 11 - 14 and of the previously known compounds 15 and 16 with MePCl2, ClCH2PCl2, tBuPCl2 and PhPCl2 resulted in the formation of the 2-arylthio-2-chloro-1,2,3-triorgano-1,3,2λ5-diazaphosphetidin-4-ones 17 - 26. 1,3-Dimethyl-2-(1,1,1,3,3,3-hexafluoro-2-propoxy)-2-phenyl-2-phenylthio-1,3,2λ5-diazaphosphetidin-4-one 29 and the 2-arylthio-1,3-dimethyl-2-(p-nitrophenoxy)-2-organyl-1,3,2λ5-diazaphosphetidin-4-ones 30 - 32 were obtained in the reactions of compounds 17, 24 and 27 with 1,1,1,3,3,3-hexafluoro-2-propanol or p-nitrophenol in the presence of triethylamine. The reaction of compound 21 with thiophenol in the presence of triethylamine resulted in a mixture of products, from which 1,3,4,5,7-pentamethyl-1,3,5,7-tetraaza-4λ5-phosphaspiro[3.3]heptan-2,6-dione 33 was isolated. The identity and structure of all the new compounds were established by 1H-, 13C- and 31P-NMR spectroscopy and by elemental analysis. A possible mechanism of reaction of sulfenamides with compounds of trivalent phosphorus is discussed. For the compounds 5a, 32 and 33 X-ray structure analyses were conducted. The cation of compound 5a involves four-coordinate phosphorus (essentially tetrahedral geometry) and is a rare example of a P-S single bond in such a system (P-S 207.37(9) pm). In 32 the geometry at phosphorus is distorted trigonal bipyramidal, with axial positions occupied by oxygen and nitrogen atoms. In the spirophosphorane 33 the geometry at phosphorus is intermediate between trigonal bipyramidal and square pyramidal, with essentially planar four-membered rings.
    Additional Material: 3 Ill.
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  • 7
    ISSN: 0044-2313
    Keywords: Di-μ-hydroxo-bis[(dimesylamido)(1,10-phenanthroline)dimethyltin(IV)] ; formation ; X-ray structure ; heptacoordinated tin ; hydrogen bond motifs ; linkage isomerism ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Polysulfonylamines. LXXXVIII. Occurrence of Three Linkage-Isomeric Complex Molecules in One Crystal: Formation and Structure of the Dimeric Dioganyltin(IV) Hydroxide [Me2{(MeSO2)2N}(phen)Sn(μ-OH)]2Crystal of the title compound (triclinic, space group P1) were obtained from Me2Sn[N(SO2Me)2]2 and 1,10-phenanthroline by adventitious hydrolysis. The structure consists of four independent [Me2{(MeSO2)2N}(phen)Sn(OH)] moieties A, A′, B, B′ that are associated via four-membered [SnO(H)]2 rings to form two centrosymmetric homodimers AA, BB and one asymmetric heterodimer A′B′. The four crystallographically independent tin atoms attain moderately distorted pentagonalbipyramidal coordinations, the apical positions being occupied by the methyl groups and the equatorial sites by the oxygen atoms of the μ-OH groups, the nitrogen atoms of the bidentate phen ligand and one oxygen atom of the (MeSO2)2N⊖ anion. Each anion is further connected to the respective complex core through an Sn—O—H… A hydrogen bond, where the acceptor A is nitrogen in AA and the A′ fragment of A′B′, or oxygen in BB and the B′ fragment of A′B′. The distinct hydrogen bond motifs in the three linkageisomeric complex units originate from two essentially different conformations of the dimesylamide anions.
    Notes: Kristalle der Titelverbindung (triklin, Raumgruppe P1) entstanden durch unplanmäßige Hydrolyse bei der Umsetzung von Me2Sn[N(SO2Me)2]2 mit 1,10-Phenanthrolin. Die Struktur besteht aus vier unabhängigen [Me2{(MeSO2)2N}(phen)Sn(OH)]-Einheiten A, A′, B und B′, die über viergliedrige [SnO(H)]2-Ringe zu zwei inversionssymmetrischen Homodimeren AA und BB sowie einem asymmetrischen Heterodimer A′B′ assoziiert sind. Die vier kristallographisch unabhängigen Zinnatome erreichen mäßig verzerrte pentagonal-bipyramidale Koordinationen, wobei die apikalen Positionen von den Methylgruppen, die äquatorialen Lagen von den Sauerstoffatomen der μ-OH-Gruppen, den Stickstoffatomen des zweizähnigen phen-Liganden und einem Sauerstoffatom des (MeSO2)2N⊖-Anions eingenommen werden. Ferner ist jedes Anion über eine Wasserstoffbrücke des Type Sn—O—H… A an den zugehörigen Komplexrumpf gebunden; als Akzeptor A wirkt in AA und im A′-Fragment von A′B′ das Stickstoffatom, in BB und im B′-Fragment von A′B′ ein Sauerstoffatom des Anions. Die Ausbildung bindungsisomerer Komplexe über unterschiedliche Wasserstoffbrückenmotive ist letztlich auf zwei grundlegend differierende Konformationen der Dimesylamid-Anionen zurückzuführen.
    Additional Material: 3 Ill.
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  • 8
    ISSN: 0044-2313
    Keywords: Gold(I) ; polysulfonylamide ; metal complex ; X-ray structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Polysulfonylamines. LXXX [1]. Synthesis and Crystal Structures of Gold(I) Complexes with Disulfonylamide LigandsComplexes of the type Ph3PAuL (L = disulfonylamide ligand) can be conveniently prepared from Ph3PAuX (X = halide) and the corresponding silver disulfonylamide. Crystal structure determinations of four such complexes show the following common features: (i)The coordination at gold is linear; (ii)no short intermolecular contacts are observed; (iii)the gold atoms display two intramolecular Au … O contacts to L; (iv)the S-N bond lengths correspond to bond orders of ca. 1.4.
    Notes: Komplexe der Form Ph3PAuL (L = Disulfonylamid-Ligand) lassen sich bequem aus Ph3PAuX (X = Halogenid) und dem entsprechenden Silber-Disulfonylamid synthetisieren. Kristallstrukturbestimmungen von vier solchen Komplexen zeigen folgende gemeinsame Merkmale: (i) Die Koordination am Gold-Zentrum ist linear; (ii) keine kurzen intermolekulare Kontakte werden beobachtet; (iii) es gibt kurze intramolekulare Kontakte zwischen Gold und je zwei Sauerstoffatomen von L; (iv) die S-N-Bindungslängen entsprechen einem Bindungsgrad von ca. 1,4.
    Additional Material: 4 Ill.
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  • 9
    ISSN: 0044-2313
    Keywords: 1,3,2λ5-Diazaphosphetidin-4-ones ; 2-Arylseleno-2-chloro-1,2,3-triorgano Selenenamides ; 77Se-NMR ; X-ray structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthese und Charakterisierung von 2-Arylseleno-2-chloro-1,2,3-triorgano-1,3,2λ5-diazaphosphetidin-4-onenDie Reaktion von N,N′-Dimethyl-N,N′-bis(trimethylsilyl)harnstoff 8 und N-Methyl-N′-phenyl-N,N′-bis(trimethylsilyl)harnstoff 9 mit Phenylselenenylchlorid 6 oder p-Chlorophenylselenenylchlorid 7 ergab die N-Arylseleno-N,N′-diorgano-N′-(trimethylsilyl)harnstoffe 10-13. Die Umsetzung von 10-13 mit MePCl2 und PhPCl2 führte zur Bildung einer neuen Verbindungsklasse, der 2-Arylseleno-2-chloro-1,2,3-triorgano-1,3,2λ5-diazaphosphetidin-4-one 14-19. Die neuen Selenophosphorane 20 and 21 wurden durch Umsetzung der Verbindungen 15 und 17 mit p-Nitrophenol in Anwesenheit von Triethylamin dargestellt. Identität und Struktur der neuen Verbindungen wurden durch 1H- und 13C-NMR-Spektroskopie und durch Elementaranalyse sowie durch 31P- und 77Se-NMR-Spektroskopie für 14-21 und durch Massenspektrometrie für 11 und 13 bewiesen. Ein möglicher Mechanismus der Bildung der Selenophosphorane wird diskutiert. Für die Verbindungen 19 und 20 wurden Einkristall-Röntgenstrukturanalysen durchgeführt. Beide Strukturen zeigen eine verzerrt trigonalbipyramidale Geometrie am Phosphor, wobei die größten Verzerrungen durch die viergliedrigen Ringe verursacht werden.
    Notes: The reactions of N,N′-dimethyl-N,N′-bis(trimethylsilyl)urea 8 and N-methyl-N′-phenyl-N,N′-bis(trimethylsilyl)urea 9 with phenylselenenyl chloride 6 and p-chlorophenylselenenyl chloride 7 furnished the N-arylseleno-N,N′-diorgano-N′-(trimethylsilyl)ureas 10-13. The reactions of 10-13 with MePCl2 and PhPCl2 resulted in the formation of a new class of compounds, the 2-arylseleno-2-chloro-1,2,3-triorgano-1,3,2λ5-diazaphosphetidin-4-ones 14-19. The new selenophosphoranes 20 and 21 were obtained in the reaction of 15 and 17 with p-nitrophenol in the presence of triethylamine. The identity and structure of the new compounds were established by 1H- and 13C-NMR spectroscopy, elemental analysis, 31P- and 77Se-NMR spectroscopy in the case of the selenophosphoranes 14-21, and mass spectrometry in the case of 11 and 13. A possible mechanism of the reaction leading to the selenophosphoranes is discussed. Single-crystal X-ray structure analyses of the selenophosphoranes 19 and 20 were conducted. Both display distorted trigonal bipyramidal geometry at phosphorus, the major distortions being imposed by the four-membered rings.
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 623 (1997), S. 147-150 
    ISSN: 0044-2313
    Keywords: Difluorosulfato-di(acetonitrile)dimethyltin(IV) ; dimethyltin(IV)-bis[di(fluorosulfonyl)amide] ; synthesis ; X-ray structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Di(fluorosulfato)-di(acetonitrile)dimethyltin(IV) [Me2Sn(OSO2F)2(NCMe)2]: Formation and Molecular StructureA single crystal of the title complex (4) was formed accidentally in an attempt to grow crystals of the known compound Me2Sn[N(SO2F)2]2 (3) from acetonitrile. Bulk quantities of the thermally labile species 4 can be obtained from Me2Sn(OSO2F)2 and MeCN. The structure of 4 (monoclinic, space group P21/n) consists of all-trans octahedral formula units displaying crystallographic centrosymmetry (Sn-C 209.2, Sn—O 225.8, Sn—N 235.9 pm, cis-angles 87-93°). The O-monodentate FSO3 ligand does not deviate significantly from C3v symmetry (mean dimensions: S—O 143.4, S—F 156.8 pm, O—S—O 114.9, F—S—O 103.3°). For 3, a new synthesis involving metathesis of Me2SnCl2 with AgN(SO2F)2 · C6H6 is described.
    Notes: Ein Einkristall des Titelkomplexes (4) entstand zufällig bei Versuchen, röntgentaugliche Kristalle der bekannten Verbindung Me2Sn[N(SO2F)2]2 (3) aus Acetonitril zu züchten. Die thermolabile Substanz 4 kann gezielt aus Me2Sn(OSO2F)2 und MeCN dargestellt werden. Die Kristallpackung von 4 (monoklin, Raumgruppe P21/n) besteht aus all-trans-oktaedrischen Formeleinheiten mit kristallographischer Inversionssymmetrie (Sn—C 209,2, Sn—O 225,8, Sn—N 235,9 pm, cis-Winkel 87-93°). Die als einzähniger O-Ligand wirkende FSO3-Gruppe weicht nicht stark von C3v-Symmetrie ab (Mittelwerte: S—O 143,4, S—F 156,8 pm, O—S—O 114,9, F—S—O 103,3°). Als neues Darstellungsverfahren für 3 wird die Metathese von Me2SnCl2 mit AaN(SO2F)2 · C6H6 beschrieben.
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