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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 105 (1972), S. 2089-2094 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Crystal and Molecular Structure of triptych-Boroxazolidine (Triethanolamine Borate)The crystal structure of triptych-boroxazolidine, C6H12BNO3, has been determined by X-ray diffraction. The intensity data were collected by a Pailred diffractometer and the structure was solved by direct methods. The molecule has threefold symmetry along the intermolecular B—N bond with the length 1.677 ± 0.006 Å.
    Notes: Die Struktur von triptych-Boroxazolidin, C6H12BNO3, wurde röntgenographisch mit Hilfe direkter Methoden bestimmt. Das Molekül besitzt eine dreizählige Symmetrieachse entlang einer innermolekularen B—N-Bindung mit der Länge 1.677 ± 0.006 Å.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 105 (1972), S. 2085-2088 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Coordination of Boron in triptych-Boroxazolidine (Triethanolamine Borate) and its Addition Compound with Antimony PentachlorideAdditional spectroscopic measurements of B(OC2H4)3N (1) and of the newly prepared 1 : 1-adduct with antimony pentachloride confirm a pyramidal O3B—N-structure for 1 and a trigonal-planar BO3-structure for the adduct. The thermal decomposition of 1 yields B2O3 and some derivatives of morpholine.
    Notes: Ergänzende spektroskopische Untersuchungen an B(OC2H4)3N (1) und seinem neu hergestellten 1:1-Addukt mit Antimonpentachlorid bestätigten für 1 eine pyramidale O3B—N-Anordnung und wiesen für das Addukt eine trigonal-planare BO3-Anordnung nach. Die thermische Zersetzung von 1 bei 240° ergibt in der Hauptsache Bortrioxid und einige Morpholinderivate.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 106 (1973), S. 1139-1144 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The Crystal Structure of Diphenylphosphinic AcidDiphenylphosphinic acid, C12H11O2P, crystallizes in the monoclinic space group P21/c with four molecules in the unit cell. a = 11.441(4) Å, b = 6.059(3) Å, c = 15.722(7) Å, β = 99.93(3)°. The molecules are linked to chains by hydrogen bonds along the twofold screw axis. The O…H—O distance is 2.468(8) Å; the P—O distances are 1.486(6) Å and 1.526(6) Å.
    Notes: Diphenylphosphinsäure, Cl2H11O2P, kristallisiert mit 4 Formeleinheiten pro Elementarzelle in der Raumgruppe P21/c. a = 11.441(4) Å, b = 6.059(3) Å, c = 15.722(7) Å, β = 99.93(3)°. Die einzelnen Moleküle sind in Richtung der zweizähligen Schraubenachsen durch Wasserstoffbrückenbindungen der Länge 2.468(8) Å, zu Ketten verknüpft. Die Bindungsabstände d(P=O) bzw. d(P—OH) betragen 1.486(6) bzw. 1.526(6) Å.
    Additional Material: 2 Ill.
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 108 (1975), S. 3091-3095 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Crystal Structure and Properties of Dimethyl 2,3-Bis(diphenylphosphino)fumarateBy X-ray crystal structure determination it is shown that the substitution of the chlorine atoms in dimethyl 2,3-dichloromaleate by diphenylphosphino groups yields the title compound instead of the expected derivative of maleic acid. Its space group is P21/c. The unit cell contains two molecules with an inversion centre in the middle of the C=C-bond. Reaction with oxygen or sulfur yields the corresponding phosphine oxide and sulfide.
    Notes: Durch röntgendiffraktometrische Kristallstrukturbestimmung wurde festgestellt, daß bei der Substitution der Chloratome des 2,3-Dichlormaleinsäure-dimethylesters durch Diphenylphos-phinogruppen nicht das erwartete Maleinsäurederivat entsteht, sondern eine cis-trans-Umlagerung zum entsprechenden Fumarsäurederivat (1) stattfindet. Die Verbindung kristallisiert in der Raumgruppe P21/c mit der 2 Formeleinheiten enthaltenden Elementarzelle a = 11.490 Å, b = 8.621 Å, c = 13.688 Å, β = 95.93°. In der Mitte der C=C-Doppelbindung der Moleküle liegt ein Inversionszentrum. Durch Reaktion mit Sauerstoff bzw. Schwefel erhält man aus 1 das entsprechende Phosphinoxid bzw. -sulfid.
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 106 (1973), S. 177-187 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Diphenyl(trimethylsilyl)phosphine as a Reagent for the Preparation of Acylphosphides resp. phosphino Derivatives of Dicarboxylic Acids and Squaric Acid.Some new diphenylphosphides resp. diphenylphosphino derivatives of dicarboxylic acids and squaric acid have been synthesized by the aid of diphenyl(trimethylsilyl)phosphine. Most of the compounds are coloured and sensitive to light. Their vibration spectra are discussed.
    Notes: Die Umsetzung von Acylchloriden mit Diphenyl(trimethylsilyl)phosphin bietet einen präparativen Weg zu Acyl-(diphenylphosphiden) bzw. Diphenylphosphinoderivaten. Auf diese Weise wurden diese Derivate von einigen Dicarbonsäuren und der Quadrasäure erhalten. Die Verbindungen sind zumeist farbig und lichtempfindlich. Ihre Schwingungsspektren werden diskutiert.
    Additional Material: 2 Tab.
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 107 (1974), S. 117-122 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: 2,3-Bis(diphenylphosphino)maleic Anhydride and Diphenylphosphino Derivatives of Cyclobutenedione as Ligands in Metal Carbonyls2,3-Bis(diphenylphosphino)maleic anhydride is prepared from 2,3-dichloromaleic anhydride and diphenyl(trimethylsilyl)phosphine. With this compound as a bidentate ligand the complexes Ni(CO)2L and M(CO)4L (M=Cr, Mo, W) are obtained. These are stable and deeply coloured, dut to an absorption band in the region of 17500 cm-1 which shows a strong solvatochromic effect. With 1,2-bis(diphenylphosphino)cyclobutenedione as ligand L only the complex Ni(CO)2L could be prepared, with immediately decomposes at ligand forms stable complexes of the type M(CO)5L (M=Cr, Mo).
    Notes: Aus 2.3-Dichlomaleinsäureanhydrid und Diphenyl(trimethylsilyl)phosphin dargestelltes 2,3-Bis(diphenylphosphino)maleinsäureanhydrid kann als zweizähniger Ligand in Carbonylen des Ni, Cr, Mo und W zwei CO substituieren. Die so dargestellten Komplexe sind luftbeständig und überraschend tieffarbig; ihre bei ∼17500 cm-1 beobachtete Absorptionsbande zeigt einen starken Solvatochromieeffekt. 1,2-Bis(diphenylphosphino)cyclobutendion konnte nur in Ni(CO)4 unter Substitution von zwei CO eingeführt werden. Die Charakterisierung der orangefarbenen kristallinen Verbindung wird durch ihre extreme Lichtempfindlichkeit erschwert. Dagegen bildet 1-(Diphenylphosphino)-2-phenylcyclobutendion als einzähniger Ligand L stabile Komplexe vom Typ M(CO)5L mit M=Cr, Mo.
    Additional Material: 2 Tab.
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 130 (1997), S. 135-140 
    ISSN: 0009-2940
    Keywords: Synthesis ; Phosphorus ; Supersilyloligophosphides ; Crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Reaction of P4 in THF or DME with 2 R*Na (R* = SitBu3) at -78°C leads quantitatively to deep red THF or DME adducts of R*NaP-P=P-PNaR* (3). According to 31P NMR, the P4 skeleton 3 is cis-configurated. On the other hand, reaction of P4 in TBME with 2 R*Na at -78°C leads quantitatively to (R*NaP)4 (4), a [2+2] cycloadduct of 3, the Na4P8 skeleton of which according to X-ray structure analysis forms a double cube with four P atoms in the second layer and two P and two Na atoms in alternating positions in the first and in the third layer (the Na atoms are coordinated with donors). By resolving the THF adduct 3 in TBME (the TBME adduct of 4 in THF) the compound 4 (the compound 3) is rapidly formed under reversal of the P-P=P-P configuration by way of [2+2] cycloaddition (by way of [2+2] cycloreversion). 3 and 4 are sensitive to oxidation and to protolysis. With TCNE, 3 is oxidized to R*2P4 (bicyclic P4 skeleton), with CF3SO3H, 3 may be transformed into R*3P5Na2 X 4 THF or in (R*P3)3 and R*PH2.
    Additional Material: 4 Ill.
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 122 (1989), S. 481-483 
    ISSN: 0009-2940
    Keywords: (Diphenylacetylene)molybdenum complexes ; Molybdenum(diphenylacetylene) complexes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Diphenylacetylene Complexes of Molybdenum: [MoCl4(PhC≡CPh)(POCl3)] and the Crystal Structure of [MoCl4(PhC≡CPh)]2The monomeric alkyne molybdenum(IV) complex [MoCl4-(PhC≡CPh)(POCl3)] (1) is prepared by the reaction of MoCl5 with diphenylacetylene in CH2Cl2 solution in the presence of POCl3. According to spectroscopic results, the alkyne ligand in 1 forms a metallacyclopropene structure. In diluted CH2Cl2 solutions, 1 dissociates forming [MoCl4(PhC≡CPh)]2 (2) and POCl3. The crystal structure determination of 2 leads to the space group p21/n. 2 forms centrosymmetric dimeric molecules with MoCl2Mo bridges.
    Additional Material: 1 Ill.
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  • 9
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Synthesis and Properties of Derivatives fo 2,3-Bis(diphenylphosphino)maleic Anhydride as a Contribution to the Problem of Colour, Conjugation, and complex Formation of this Class of CompoundsDerivatives of 2,3-bis(diphenylphosphino)maleic anhydride containing S, C (as ) and N (as or ) as heteroatom within the ring system (3-6) are prepared from the corresponding 2,3-dichloro compounds with the aid of diphenyl(trimethylsilyl)phosphine. These new compounds form chelate complexes of the type Ni(CO)2. L, Cr(CO)4-L (7-14). Ligands and complexes are strongly coloured. The heteroatom of the maleic anhydride ring influences remarkably the corresponding absorption bands. The solvatochromic effect on the low wave number absorption band of the metal(O) complexes is examined. For comparison 2,3-bis(diphenylamino)-N-methylmaleimide (15) and two diphenylphosphino derivatives (16, 18) of 3,4-dichloro-5-methoxy-2(5H)-furanone are synthesized. The vc=c bands of the compounds are assigned. The observed shifts (up to 120 cm-1) and the dependence of the colour on the size of the conjugated system are discussed.
    Notes: Derivate des 2,3-Dichlormaleinsäure-anhydrids, die als Heteroatom im Fünfring S, C (als ) und N (als bzw. )enthalten, wurden mit Diphenyl(trimethylsilyl)phosphin in die jeweiligen 2,3-Bis(diphenylphosphino)-Derivate (3-6) übergeführt, die als zweizähnige Liganden zwei CO in den Carbonylen von Ni, Cr und Mo substituieren können (7-14). Die freien Liganden und ihre Metallcarbonyle sind intensiv farbig. Die entsprechenden Absorptionsbanden zeigen einen beträchtlichen Einfluß des Heteroatoms im Fünfring an. Weiterhin wurde die Solvatochromie der langwelligsten Absorptionsbande in den Metallcarbonylderivaten untersucht. Zu Vergleichszwecken wurden ferner 2,3-Bis(diphenylamino)-N-methylmaleinimid (15) und zwei Diphenyl-phosphinoderivate (16, 18) des 3,4-Dichlor-5-methoxy-2(5H)-furanons erstmals dargestellt. Die Zuordnung von vc=c ist nunmehr in allen diesen Verbindungen möglich. Ihre bis zu 120 cm-1 betragende Verschiebung und die Abhängigkeit der Farben der Verbindungen von der Ausdehnung des konjugierten Systems werden diskutiert.
    Additional Material: 2 Tab.
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  • 10
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Phenylbis(trimethylsilyl)phosphine and 1,2-Diphenyl-1,2-bis(trimethylsilyl)diphosphane as Reagents for the Preparation of Heterocyclic Phosphor Compounds and Acylphosphines.The cyclic diacyl phosphines of phthalic acid and diphenic acid (4, 5) are obtained by reaction of the acyl chlorides with phenylbis(trimethylsilyl)phosphine (1). 1 yields with acetyl chloride diacetylphenylphosphine (3). Starting with 2,3-dichloromaleic acid anhydride or -thioanhydride and 1 derivatives of 1,4-dihydro-p-diphosphorin (6, 7) are prepared. Acyl-substituted 1,2-diphenyldiphosphanes (8, 9) are obtained from 1,2-diphenyl-1, 2-bis(trimethylsilyl)diphosphane (2) and benzoyl chloride or ethoxalyl chloride.
    Notes: Aus Phthalsäure-dichlorid bzw. Diphensäure-dichlorid werden durch Reaktion mit Phenylbis(trimethylsilyl)phosphin (1) die zu erwartenden cyclischen Diacylphosphine (4, 5) dargestellt. Aus 1 und Acetylchlorid erhält man Diacetylphenylphosphin (3). Mit 2,3-Dichlormaleinsäure-anhydrid bzw. -thioanhydrid und 1 entstehen unter Verknüpfung von 2 Anhydridringen Derivate des 1,4-Dihydro-p-diphosphorins (6, 7). Durch Reaktion von 1,2-Diphenyl-1,2-bis(trimethylsily)diphosphan (2) mit Benzoylchlorid bzw. Äthoxalychlorid erhält man Acylderivate des 1,2-Diphenyl-diphosphans (8 und 9).
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