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
  • Inorganic Chemistry  (38)
  • Wiley-Blackwell  (38)
  • Annual Reviews
  • 1990-1994  (38)
  • 1980-1984
  • 1955-1959
  • 1990  (38)
  • 1
    Electronic Resource
    Electronic Resource
    Über die Reaktion der käfigartigen vinylsilylierten Doppelvierringkieselsäure [(CH2=CH)(CH3)2Si]8Si8O20 mit HSi≡-haltigen Verbindungen und die Herstellung eines neuen Polymers (1990)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 583 (1990), S. 133-144 
    Details
    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 the Cage-like Vinylsilylated Double Four-ring Silicic Acid [(CH2=CH)(CH3)2Si]8Si8O20 with HSi≡ Containing Compounds and the Preparation of a New PolymerBy means of 29Si, 13C and 1H NMR it has been shown that the compounds ((CH3)3SiO)2CH3SiH and (C2H5)3SiH react completely with the eight vinyl groups of the cage-like silicic acid derivate [(CH2=CH)(CH3)2Si]8Si8O20 (Q8M8V). The reactions do not follow the Markovnikov rule and give derivatives of the formula [((CH3)3SiO)2CH3Si(CH2)2Si(CH3)2]8Si8O20 and [(C2H5)3Si(CH2)2Si(CH3)2]8Si8O20, respectively. The reaction of Q8M8V with the likewise cage-like silicic acid derivative Q8M8H in the molar ratio of 1:1 results in an insoluble polymer consisting of cross-linked double fourring silicic acid units. Due to the sterical hindrance the polymer includes parts of unreacted vinyl and H groups. Molar ratios of 〉 1 result in increasing amounts of a soluble polymer.
    Notes: Mit Hilfe der 29Si-, 13C- und 1H-NMR wird gezeigt, daß mit ((CH3)3SiO)2CH3SiH und (C2H5)3SiH eine vollständige Addition der acht Vinylgruppen des käfigartig aufgebauten Kieselsäurederivats [(CH2=CH)(CH3)2Si]8Si8O20 (Q8M8V) erfolgt. Die Addition verläuft entgegen der Markovnikov-Regel unter Bildung der Kieselsäurederivate [((CH3)3SiO)2CH3Si(CH2)2Si(CH3)2]8Si8O20 bzw. [(C2H5)3Si(CH2)2Si(CH3)2]8Si8O20. Die Reaktion des Q8M8V mit dem ebenfalls käfigartig aufgebauten Kieselsäurederivat Q8M8H führt bei einem Molverhältnis (MV) von 1:1 zu einem unlöslichen Polymer, das aus vernetzten Doppelvierringkieselsäureeinheiten aufgebaut ist und aus sterischen Gründen Anteile unumgesetzter Vinyl- und H-Gruppen enthält. Bei einem MV 〉 1 bilden sich zunehmend in organischen Lösungsmitteln lösliche Polymere.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19905830116
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    N,N′-Dilithiobis(alkylamino)phenylborane als Synthesebausteine für viergliedrige Metallacyclen (1990)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 123 (1990), S. 703-706 
    Details
    ISSN: 0009-2940
    Keywords: 4,4′-Spirobi(1,3-diaza-2-bora-4-metallacyclobutanes)/1,3-Diaza-2-bora-4-metallacyclobutanes/Metallaheterocycles with Ge, Sn, Ti, Zr ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: N,N′-Dilithiobis(alkylamino)phenylboranes as Starting Materials for Four-Membered MetallacyclesReactions of N,N′-Dilithiobis(alkylamino)phenylboranes with tetrachlorides MCl4 (M = Ge, Sn, Ti, Zr) produce the 4,4′-spirobi(1,3-dialkyl-2-phenyl-1,3-diaza-2-bora-4-metalla-cyclobutane) derivatives 1a, 1b, 2b, 3a, and 3b. With diorganylmetal dihalides R2MX2(M = Sn, Zr; X = Cl, Br), the 1,3-diaza-2-bora-4-metallacyclobutanes 2a and 4 are obtained. For 3a an X-ray structure analysis has been performed.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19901230409
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Mechanism of CH2+ Transfer from Distonic Ions X - CH2+ (X = CH2O, CH2CH2) to π- and n-Electron Bases in the Gas Phase. A Fourier Transform Ion Cyclotron Resonance (FTICR) Study Supplemented by ab initio MO Calculations (1990)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 123 (1990), S. 535-540 
    Details
    ISSN: 0009-2940
    Keywords: Carbene chemistry / Distonic ions / Fourier transform ion cyclotron resonance / Ion-molecule reactions / Mass spectrometry ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The reactions of acetonitrile, propyne, acetylene, trimethyl-silylacetylene, and tetramethylsilane, with distonic ions CH2XCH2+ [X = CH2 (2), O (3)] are studied in the gas phase using Fourier Transform Ion Cyclotron Resonance (FTICR) mass spectrometry. In line with previous studies, CH2+ is transferred to the electron Ione-pair of the nitrogen atom of CH3CN to generate CH3CN-CH2+ (4); upon collisional excitation, this ion undergoes competitive losses of H* and CH*. While both neutrals originate from the “methylene” unit of 4′, detailed studies employing labeled substrates and using various types of collision experiments reveal an intriguing dissociation pattern in that the dissociations are preceded by two intramolecular hydrogen migrations giving rise to CH3C(H) = NCH* + (6) and CH3C = N(H)CH*+ (7). While 6 serves as intermediate en route to loss of H* from the “CH” moiety, 7 is the actual precursor to generate, by loss of CH*, protonated acetonitrile, CH3CNH+ (12) (Scheme 5). In addition, 12 is formed by bimolecular proton transfer. In this reaction, translationally excited CX3CN - CY2+ * (X, Y = H, D) transfers X +- to neutral CX3CN to generate CX3CNX+ (Scheme 4). The bimolecular proton transfer as well as the intramolecular isomerizations of 4 to 6 and 7 are subject to very large kinetic isotope effects. In the transfer of CH2+ to CH3C = CH two products are formed [i.e. H3C - C ≡ C - CH3+ (16) and CH2 = C = CHCH3+ (l7) presumably via intermediate 18 (Scheme 6)]; the latter is formed by addition of CH2+ to the less hindered carbon atom of HC ≡ CCH3 reflecting the higher stability of the so-formed intermediate compared with addition to C-2, Reactions of 2 and 3 with HC ≡ CH do not result in the formation of a detectable CH2+-transfer product. When using CH2CH2CH2+ (2) the reaction is prohibited by the endothermicity to generate the initial complex (structurally related to 18). On the other hand, when CH2OCH2+ (3) is employed, the intermediate of CH2+ transfer is formed with sufficient energy to split off a hydrogen atom. Preliminary experiments with silicon-containing molecules, like Si(CH3)4 or HC ≡ CSi(CH3)3, demonstrate that the favored processes of these neutrals with 2 and 3 are due to charge transfer (in the form of an electron or an anion like CH-3 or C2H-) from the silicon-containing molecule to the distonic ions. The experimental results obtained for the CH3CN/CH2+ system are supported by ab initio MO calculations (3-21G/3-21G + ZPVE).
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19901230320
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Facile Diastereoselective Synthesis of 2,6-Dialkyl-5-methylene-1,3-dioxan-4-ones via α-Activated Vinyl Esters (1990)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 123 (1990), S. 1447-1448 
    Details
    ISSN: 0009-2940
    Keywords: Vinyl esters ; 1,3-Dioxan-4-ones, 5-methylene- ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Vinyl esters such as 2, in the presence of DABCO, undergo intial reaction with aldehydes, followed by nucleophilic attack on a second aldehyde molecule. Subsequent intramolecular transesterification affords the dioxanones 5 in high yields and high diastereomeric excesses.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19901230641
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Polysulfonylamine. XVII. Darstellung und Röntgenstrukturanalyse von Dimesylamin-Dimethylsulfoxid (1/1) (1990)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 580 (1990), S. 160-166 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Polysulfonyl Amines. XVII. Preparation and X-Ray Crystal Structure Determination of Dimesylamine-Dimethyl Sulfoxide (1/1)The solubility of dimesylamine in dichloromethane is largely enhanced by relatively small amounts of dimethyl sulfoxide. From an equimolar solution of the two components in CH2Cl2 at -30°C, a solid addition compound (CH3SO2)2NH · OS(CH3)2 (1), m.p. 53°C, was obtained. 1 crystallizes in the triclinic space group P1. The atomic arrangements of the two components are similar to those of (CH3SO2)2NH · OH2 and uncomplexed OS(CH3)2, respectively. A short NH…O hydrogen bond [N…O 262.5(5) pm] connects the dimesylamine molecule with the dimethyl sulfoxide molecule.
    Notes: Die Löslichkeit von Dimesylamin in Dichlormethan wird durch verhältnis-mäßig kleine Mengen Dimethylsulfoxid drastisch erhöht. Aus einer äquimolaren Lösung der beiden Komponenten in CH2Cl2 wurde bei -30°C ein kristallines Addukt (CH3SO2)2NH · OS(CH3)2 (1), Schmp. 53°C, erhalten. 1 kristallisiert in der triklinen Raumgruppe P1. Die Molekülstrukturen der beiden Komponenten ähneln denen in (CH3SO2)2NH · OH2 bzw. nichtkomplexiertem OS(CH3)2. Eine kurze Wasserstoffbrücke des Typs NH…O [N…O 262,5(5) pm] verknüpft das Dimesylamin mit dem Dimethylsulfoxid-Molekül.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19905800119
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Thermodynamische Untersuchung des Systems MgSeO4-ZnSeO4-H2O bei 25,0°C (1990)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 584 (1990), S. 217-224 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Thermodynamical Investigation of the System MgSeO4-ZnSeO4-H2O at 25.0°CThe solubility isotherme of the system MgSeO4-ZnSeO4-H2O at 25°C was studied. A continuous series of mixed crystals was found to be formed, i. e. both salts are isostructural. It was found that the activity coefficients of the MgSeO4 or of the ZnSeO4, resp. along the solubility isotherme can be determined with a sufficient accuracy using only the data of binary solutions and the total molality of the salt components in the respective saturated tricomponent solutions. It was established in case of formation of isomorphic mixed crystals that, if the distribution coefficient determined experimentally follows the equation , then ΔGF of formation of mixed crystals coincides practically with ΔGi, i.e. the system does not show deviations from the ideality.
    Notes: Untersucht wird die Löslichkeitsisotherme des Systems MgSeO4-ZnSeO4-H2O bei 25°C. Festgestellt wird, daß eine ununterbrochene Reihe von Mischkristallen entsteht, d. h. die beiden Salze sind isostrukturell. Es erwies sich, daß sich die Aktivitätskoeffizienten des MgSeO4 bzw. des ZnSeO4 der Löslichkeitsisotherme entlang mit ausreichender Genauigkeit aus den Angaben der entsprechenden gesättigten Binärlösungen und der totalen Molalität der Salzkomponenten der gesättigten Lösung bestimmen lassen. Weiterhin wurde festgestellt, daß, wenn bei isomorpher Mischkristallbildung der experimentell bestimmte Verteilungskoeffizient der Gleichung folgt, ΔGF der Bildung von Mischkristallen praktisch mit ΔGI zusammengefällt, d. h. das System weist keine Abweichungen vom idealen Zustand auf.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19905840124
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    1-Octin- und 4-Octin-Komplexe des Wolframs Die Kristallstrukturen von [WCl4(H—C≡C—n-C6H13) (CH3CN)] und [WCl4(n-C3H7—C≡C—n-C3H7)(CH3CN)] (1990)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 585 (1990), S. 27-37 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: 1-Octine and 4-Octine Complexes of Tungsten. Crystal Structures of [WCl4(H—C≡C — n-C6H13) (CH3CN)] and [WCl4(n-C3H7—C≡C— n-C3 H7) (CH3CN)]The octine complexes [WCl4(H—C≡C— n-C6H13)]2 (1) and [WCl4(n-C3H7—C≡C—n-C3H7)]2 (2), which are dimerized by chloro bridges, have been prepared by reactions of excess of the corresponding octine with tungsten hexachloride in CH2Cl2 suspension, forming green, moisture sensitive crystal powders. With acetonitrile the donor-acceptor complexes [WCl4(H—C≡C — n-C6H13)(CH3CN)] (1a) and [WCl4(n- C3H7—C≡C—n-C3H7)(CH3CN)] (2a), respectively, are formed. All complexes were characterized by their IR spectra as well as by their 13C n.m.r. spectra, 1a and 2a additionally by X-ray structure determinations.1a. Space group P1, Z = 2, 3482 observed unique reflexions, R = 0.033. Lattice dimensions at -70°C: a = 624.1(6), b = 1060.1(11), c = 1259.1(9) pm, α = 107.82(7)°, β = 91.64(7)°, γ = 99.91(8)°.2a. Space group C2/c, Z = 8, 1860 observed unique reflexions, R = 0.047. Lattice dimensions at -70°C: a = 1120.5(9), b = 1227.5(7), c = 1165.1(7) pm, β = 106.85(6)°.Both complexes form monomeric molecules in which the tungsten atoms are sevenfold coordinated by four chlorine atoms, by two acetylene carbon atoms, andin trans position to the latter by the nitrogen atom of the acetonitrile molecule. The octine ligands are side-on bonded with W—C bond lengths from 200 to 204 pm, corresponding with a metallacyclopropene type of structure.
    Notes: Die über Chlorobrücken dimerisierten Octin-Komplexe [WCl4(H—C≡C—n-C6H13)]2 (1) und [WCl4(n -C3H7—≡C— n-C3H7)]2 (2) werden als grüne, feuchtigkeitsempfindliche Kristallpulver aus Wolframhexachlorid und überschüssigem 1-Octin bzw. 4-Octin in CH2Cl2-Suspension synthetisiert. Mit Acetonitril bilden sich die Addukte [WCl4(H—C≡C — n-C6H13)(CH3CN)] (1a) bzw. [WCl4(n- C3H7 — C≡C — n-C3H7)(CH3CN)] (2a). Alle Komplexe wurden durch ihre IR-Spektren und ihre 13C-Kernresonanzspektren charakterisiert. Von 1a und 2a wurden röntgenographische Strukturanalysen angefertigt.1a. Raumgruppe P1, Z = 2, 3482 unabhängige beobachtete Reflexe, R = 3,3%. Gitterabmessungen bei -70°C: a = 624,1(6); b = 1060,1(11); c = 1259,1(9) pm; α = 107,82(7)°; β = 91,64(7)°; γ = 99,91(8)°.2a. Raumgruppe C2/c, Z = 8, 1860 unabhängige beobachtete Reflexe, R = 4, 7%. Gitterabmessungen bei -70°C: a = 1120,5(9); b = 1227,5(7), c = 1165,1(7) pm; β = 106,85(6)°.Beide Verbindungen bilden monomere Moleküle, in denen die Wolframatome siebenfach von vier Chloratomen, den beiden Acetylen-C-Atomen und in trans-Position zu diesen von dem N-Atom des Acetonitrilmoleküls umgeben sind. Die Octinliganden sind im Sinne von Metallacyclopropengruppen mit W—C-Abständen von 200 bis 204 pm an die W-Atome gebunden.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19905850104
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Komplexe mit Dimethyltetrathiooxalat: Struktur und Eigenschaften von [Ni(S2C2(SMe)2)2] und [Pd(S2C2(SMe)2)(PPh3)2] (1990)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 588 (1990), S. 167-180 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Structure and Properties of Homo- and Mixed-Ligand Bis-Complexes of Dimethyltetrathio-oxalate: [Ni(S2C2(SMe)2)2] and [Pd(S2C2(SMe)2) (PPh3)2][Ni(S2C2(SMe)2)2] was prepared photochemically under inert conditions from Ni(CO)4 and dimethyltetrathio-oxalate (ttoMe2) whereas [Pd(S2C2(SMe)2)(PPh3)2] was obtained thermally from Pd(PPh3)4 and ttoMe2 (beneath little [Pd(S2C2(SMe)2)2] as byproduct). In both neutral chelates the ligands are coordinated square planar round the metal atoms (space group for Ni complex C2/m, for Pd complex P1). From its electronic spectra, the IR, and cyclovoltammetric data the homo-ligand Ni complex can be interpreted as a dithiolene chelate. The mixed-ligand Pd complex shows interligand charge-transfer transitions. The Ni complex is an oxidant.
    Notes: Die Synthese von [Ni(S2C2(SMe)2)2] gelang photochemisch unter Inertbedingungen aus Ni(CO)4 und Dimethyltetrathiooxalat (ttoMe2) und von [Pd(S2C2(SMe)2)(PPh3)2] thermisch aus Pd(PPh3)4 und ttoMe2 (daneben fällt wenig [Pd(S2C2(SMe)2)2] an). In beiden Neutralchelaten sind die Liganden quadratisch-planar um Ni (Raumgruppe C2/m) bzw. Pd (Raumgruppe P1) koordiniert. Elektronenspektrum, IR-Daten und Cyclovoltammogramm lassen den reinligandigen Ni-Komplex als Dithiolenchelat interpretieren. Im gemischtligandigen Pd-Komplex treten Interligand-charge-transfer-Übergänge auf. Der Ni-Komplex wirkt oxydierend.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19905880120
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Halogenaustausch an Siliciumtetrahalogeniden. XIII. Zur Struktur und Reaktivität von Siliciumtetrahalogenid-Pyridin-Komplexen (1990)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 582 (1990), S. 211-216 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Halogen Exchange on Silicon Halides. XIII. Structure and Reactivity of Silicon Halide-Pyridine CompoundsSiCl4 · 2 Py crystallizes in the monoclinic space group C2/m with 3 formula units per unit cell. The transoctahedral molecule has 2/m-symmetry. The bond distances Si—Cl are 218.3 pm being with it 9.2% longer as in the tetrahedral SiCl4. This bond weakening reduces the activation energy of the halogen exchange on silicon. (SiI2Py4)I2 crystallizes trigonal-rhombohedral with 3 formula units per unit cell.
    Notes: SiCl4 · 2 Py kristallisiert in der Raumgruppe C2/m mit 2 Formeleinheiten pro Elementarzelle. Das trans-oktaedrische Molekül besitzt 2/m-Symmetrie. Die Si—Cl-Abstände betragen 218,3 pm und sind damit um 9,2% länger als im tetraedrischen SiCl4. Diese Bindungsschwächung senkt die Aktivierungsenergie des Halogenaustausches am Silicium. (SiI2Py4)I2 kristallisiert trigonal-rhomboedrisch mit 3 Formeleinheiten pro Elementarzelle.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19905820125
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Darstellung und Reaktivität von Tris(dialkylthiophoshinyl)-phosphanenProfessor Karl-Heinz Thiele zum 60. Geburtstage gewidmet (1990)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 585 (1990), S. 177-188 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Reactivity of Tris(dialkylthiophosphinyl)phosphanesInvestigation of different methods for the synthesis of the title compounds shows that the reaction of LiP(SiMe3)2 with chlorides of thiophosphinic acid is the most effective method. Thereby tris(dialkylthiophosphinyl)phosphanes of the type P[P(S)R2]3 (R = Me, Et, n-Pr) are obtained in good yields. They were characterized by 1H, 31P NMR, and mass spectrometry. The stability of different iso-tetraphosphanes and the intramolecular charge distribution is compared on the basis of HMO calculations. These results are confirmed by investigations of the reactivity of the title compounds with OH-, HCl, and Br2.
    Notes: Die Untersuchung verschiedener Synthesemethoden zur Darstellung der Titelverbindungen ergab, daß am besten die Reaktion von LiP(SiMe3)2 mit Thiophosphinsäurechloriden geeignet ist. Es werden Tris(dialkylthiophosphinyl)phosphane des Typs P[P(S)R2]3 (R = Me, Et, n-Pr) in guten Ausbeuten erhalten und mittels 1H-, 31P-NMR- und Massenspektrometrie charakterisiert. Durch HMO-Berechnungen werden Stabilitäten verschiedener iso-Tetraphosphane verglichen und Voraussagen zur Ladungsverteilung in den Molekülen getroffen. Diese Ergebnisse werden durch Reaktivitätsuntersuchungen der Titelverbindungen gegenüber OH-, HCl und Br2 bestätigt.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19905850120
    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...