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  • Chemistry  (45)
  • Polymer and Materials Science  (9)
  • 1975-1979  (42)
  • 1950-1954  (3)
  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 109 (1976), S. 965-969 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions of the α-Methylene Group in (Glycinato)platinum(II) Chelate ComplexesThe reaction of the glycinato complex (n-Bu3P)Pt(Cl)NH2CH2CO2) (1)with aldehydes or alkylating agents (dimethyl sulfate, benzyl chloride) affords the chelate compounds 3-6 with substituted α-amino acids.
    Notes: Der Glycinato-Komplex (n-Bu3P)Pt(Cl)NH2CH2CO2) (1) setzt sich mit Aldehyden oder Alkylierungsmitteln (Dimethylsulfat, Benzylchlorid) zu entsprechenden Chelat-Verbindungen 3-6 mit Höheren α-Aminosäuren um.
    Additional Material: 3 Tab.
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 109 (1976), S. 970-993 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: New Transition Metal Complexes with Nucleic Acid bases and NucleosidesThe isolation of carbonylmetal complexes W(CO)5L (1), [W(CO)5L]- (2), [Mo(CO)3enL]- (3), (π-CH3C5H4)Mn(CO)2L (4), Rh(CO)2(CI)L (5), (H)(CO)(PPh3)2L2 (6), M(CO)(PPh3)2L (M = Rh, Ir) (7,8) and of phosphine and amine containing monomeric and polynuclear palladium(II) and platinum(II) complexes (9-14 with various neutral and anionic nucleic acid bases and nucleosides L is reported. Using i. r. and 1H n. m. r. data a tentative assignment of the coordination sites of the ambidentate ligands is given. The reaction of 1,3,7,9-tetramethylxanthinium perchlorate with Hg11 acetate affords the C-8 mercurated complex 15.
    Notes: Die Darstellung von Carbonylmetallkomplexen W(CO)5L (1), [W(CO)5L]- (2), [Mo(CO)3enL] (3)-, (π-CH3C5H4)Mn(CO)2L (4), Rh(CO)2(Cl)L (5), Ir(H)(CO)(PPh3)2L2 (6), M(CO)(PPh3)2L (M = Rh, Ir) (7,8) und von phosphin- und amin-haltigen monomeren sowie mehrkernigen Palladium(II)-und Platin(II)-und Platin (II)-Komplexen (9-14) mit einer Reihe von neutralen und anionischen Purin und Pyrimidin-Basen und Nucleosiden L wird beschrieben. Mit Hilfe von IR- und 1H-NMR- Daten wird versucht, die Koordinationsstellen der ambidenten Nucleinbasen zu bestimmen. 1,3,7,9-Tetramethylxanthinium-perchlorat wird mit Quecksilber (II)-acetat am C-8 metalliert (15).
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 108 (1975), S. 314-321 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Mono- and Bis(pheyltelluro)methyllithiumSolutions of the title compounds are readily prepared from bis(phenyltelluro)methane (7): the monosubstituted one by transmetallative C6H5Te/Li-exchange with alkyllithium, the disubstituted one by direct metalation with lithium diisopropylamide. This was proved in both cases by deuterolysis and derivatization with electrophiles. The new tellurium derivatives are compared with the sulfur and selenium analogues.
    Notes: Lösungen der Titelverbindungen lassen sich aus Bis(phenyltelluro)methan (7) leicht darstellen, das monosubstituierte Li-Derivat durch C6H5Te/Li-Austausch mit Alkyllithium, das disubstituierte durch direkte Metallierung mit Lithium-diisopropylamid. In beiden Fällen wurde dies durch Deuterolyse und Umsetzung mit Elektrophilen bewiesen. Die neuen Tellurderivate werden mit den Schwefel- und Selen-Isologen verglichen.
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  • 4
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Transition Metal Carbyne Complexes, XVPhenylcarbyne as well as Methoxyphenyl-, (Dimethylamino)phenyl-, and Aminophenylcarbene as Ligands in Cationic or Neutral Complexes of the Type π-ArCr(CO)2LComplexes of the type π-ArCr(CO)3 1a-d are converted into the carbene complexes π-ArCr(CO)2-[C(C6H5)OCH3] 2a-d by treatment with phenyllithium followed by alkylation. On treatment with boron trichloride 2a-d yield the cationic carbyne complexes of the general formula {π-ArCr(CO)2[C(C6H5]}⊕[BCl4]⊖ 3a, c, d Aminolysis with ammonia or dimethylamine leads to the aminocarbene complexes π-ArCr(CO)2[C6H5)NR2] 4 and 5 which are not obtainable by direct aminolysis of 2a-d. These diamagnetic complexes, some of which are very thermolabile, were characterized by i. r., H n. m. r., and 13C n. m. r. spectroscopy.
    Notes: Aus Tricarbonyl-Aromaten-chrom(0)-Komplexen π-ArCr(CO)3 1a-d lassen sich durch Umsetzung mit Phenyllithium und anschließende Alkylierung die Carbenkomplexe π-ArCr(CO)2-[C(C6H5)OCH3] 2a-d darstellen, deren Reaktion mit Bortrichlorid zu kationischen Carbinkomplexen der allgemeinen Formel {π-ArCr(CO)2[C(C6H5]}⊕[BCl4]⊖ 3a, c, d führt. Bei der Aminolyse der kationischen Komplexe mit Ammoniak oder Dimethylamin entstehen - durch Aminolyse von 2a-d nicht zugängliche - Aminocarbenkomplexe π-ArCr(CO)2[C6H5)NR2] 4 und 5. Die diamagnetischen, teilweise sehr thermolabilen Verbindungen werden durch IR-, 1 H-NMR-und 13C-NMR-Spektren charakterisiert.
    Additional Material: 4 Tab.
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 108 (1975), S. 3317-3325 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Preparation and Reactivity of trans-Cyano(pseudo)halogenobis(triphenylphosphine)platin(II). ComplexesThe oxidative addition of cyanogen halides to Pt(PPh3)4 affords the mixed trans-cyanohalogeno complexes (Ph3P)2Pt(X)CN 1a-c. In these complexes the halide ligands can be easily exchanged ↔other anions due to the trans effect of the cyanide group. The azide and fulminate ligand of 1d and g can be converted under mild conditions into iso(thio)cyanato groups. The cycloadduct 4b of 1d and acetonitrile contains N1- and N2-bonded 5-methyltetrazolate ligands. Above 190°C fluxional exchange N1 ↔ N2 ↔ N 3 ↔ N4 of the coordinated tetrazolate is observed.
    Notes: Die oxidative Addition von Halogencyan an Pt(PPh3)4 liefert die gemischten trans-Cyanohalogeno-Komplexe (Ph3P)2Pt(X)CN 1a-c. In diesen kann Halogenid aufgrund des trans-Effekts der Cyanogruppe leicht durch andere anionische Liganden ausgetauscht werden. Die Azid- und Fulminatliganden in 1d und g sind besonders reaktiv und lassen sich unter milden Bedingungen in die Iso(thio)cyanato-Gruppe umwandeln. Der durch Cycloaddition von Acetonitril an die Azid-gruppe von 1 d gebildete Komplex 4 b enthält N1- und N2-gebundene 5-Methyltetrazolat-Liganden. Oberhalb 190°C wird eine N1 ↔ N2 ↔ N3 ↔ N4-Fluktuation des koordinierten Tetrazolats festgestellt.
    Additional Material: 4 Tab.
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 111 (1978), S. 1246-1252 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: N-Dithiocarboxy-α-amino Acid Complexes of Nickel, Palladium, and Platinum(II)A series of square-planar dithiocarbamato complexes Ni, Pd, Pt; (R″ = H, Et) with various α-amino acids as amine components is described and characterized by 1H NMR and IR spectra.
    Notes: Eine Reihe von quadratisch-planaren Dithiocarbamato-Komplexen des Typs (R′CO2R″)2 (M = Ni, Pd, Pt; R″ = H, Et) mit verschiedenen α-Aminosäuren als Aminkomponenten wird beschrieben und 1H-NMR- und IR-spektroskopisch charakterisiert.
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 111 (1978), S. 615-628 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Metal Complexes with N,N-Bis(diphenylphosphino)-α-amino Acid EstersA series of metal complexes of palladium(II), platinum(II), rhodium(I) and carbonyl complexes of chromium, molybdenum, tungsten and manganese with the optically active title ligands (obtained from α-amino acids and chlorodiphenylphosphine) is described. The P—N-bond of the free ligands is cleaved by HCl; bis(diphenylphosphino)glycine methylester can be monoalkylated at the CH2 group.
    Notes: Mit den aus α-Aminosäureestern und Chlordiphenylphosphin erhaltenen. optisch aktiven Titelliganden werden eine Reihe von Metallkomplexen von Palladium(II). Platin(II), Rhodium(I) sowie von Chrom-, Molybdän-, Wolfram- und Mangancarbonylen und deren spektroskopische Daten beschrieben. Die P—N-Bindung in den freien Liganden läßt sich mit HCl spalten, Bis(diphenylphosphino)glycin-methylester an der CH2-Gruppe monoalkylieren.
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 111 (1978), S. 3719-3725 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions of Squaric Acid with Triphenylphosphine Platinum(0) CompoundsSquaric acid shows three types of reactions with zerovalent platinum compounds: with Pt(PPh3)4 it reacts as an acid to form [HPt(PPh3)3]⊕ [HC4O4]⊖ (1). From (PPh3)2Pt(C2H4) the olefin complex 2 is obtained. Heating of 1 and 2, respectively, leads to ring opening to give the dihydroxyplatinacyclopentenedione 3.
    Notes: Quadratsäure zeigt gegenüber Pt0-Verbindungen drei Reaktionsmöglichkeiten: Der Säurecharakter der Quadratsäure kommt bei der Bildung des kationischen Hydridkomplexes [HPt(PPh3)3]⊕ [HC4O4]⊖ (1) aus Pt(PPh3)4 zum Ausdruck; mit (PPh3)2Pt(C2H4) entsteht dagegen der Olefinkomplex 2. Erhitzen von 1 bzw. 2 auf 130°C liefert unter Öffnung des Vierrings das Dihydroxyplatinacyclopentendion 3.
    Additional Material: 3 Tab.
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  • 9
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 19 (1975), S. 371-373 
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Nineteen compounds are described that are effective heterogeneous nucleating agents for the crystallization of poly(vinylidene chloride-vinyl chloride) copolymers containing 7-13% vinyl chloride. Most of the compounds are relatively high-melting organic nitrogen heterocyclics. The more effective ones raise the polymer freezing points about 20-40°C using a prescribed thermal history.
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 7 (1976), S. 224-228 
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Comparative examinations on gold layers applied on silver. By electrolytical deposition, high vacuum evaporation and cladding gold layers of 10-20 μm thickness had been produced on silver. These layers had been examined in their initial state and after different heat treatments on air by a light microscope and a scanning electron microscope. The microhardness of these layers had also been determined and the diffusion between gold and silver had been studied with the electron microanalyzer. Besides the known features of surface structure and hardness certain differences in the tarnishing and diffusion behaviour had been detected. The cause of these differentiations is primarily due to typical processing features.
    Notes: Durch elektrolytische Abscheidung, Hochvakuumbedampfung und Walzplattierung wurden 10-20 μm dicke Goldschichten auf Silber hergestellt. Die Schichtwerkstoffe wurden licht- und rasterelektronenmikroskopisch im Ausgangszustand und nach verschiedenen Wärmebehandlungen an Luft untersucht. Daneben wurde die Mikrohärte der Schichten ermittelt und mit einer Elektronenstrahlmikrosonde die Diffusion zwischen Gold und Silber studiert. Es haben sich neben den bekannten Merkmalen der Oberflächenstruktur und der Härte gewisse Unterschiede im Anlauf- und Diffusionsverhalten gezeigt. Die Ursache dieser Differenzierungen ist in erster Linie auf typische Verfahrensmerkmale zurückzuführen.
    Additional Material: 8 Ill.
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