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  • Chemistry  (17)
  • General Chemistry  (8)
  • FROTH
  • Wiley-Blackwell  (17)
  • 1970-1974  (17)
  • 1950-1954
  • 1925-1929
  • 1974  (17)
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Keywords
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  • Wiley-Blackwell  (17)
Years
  • 1970-1974  (17)
  • 1950-1954
  • 1925-1929
Year
  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 107 (1974), S. 367-379 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Lithio-1,3,5-trithianes Generation in Solution, Reactions with Electrophiles, and Use in Nucleophilic Acylation1,3,5-Trithiane and 2-mono- as well as 2,4,6-trisubstituted trithianes are shown to be metallated by n-butyllithium in THF. Reaction of the lithio derivatives thus obtained with electrophiles leads to more highly substituted trithianes which in some cases can be isolated in a pure form. The n.m.r. spectra of the products at room temperature are described. Mercury(II)-assisted solvolysis of alkyltrithianes „liberates“ the most highly substituted carbon with formation of carbonyl compounds or their O-acetals. This completes a sequence of reactions which suggests use of lithiotrithianes as reagents for nucleophilic acylation. Advantages and disadvantages of this procedure compared to the dithiane method are discussed.
    Notes: 1,3,5-Trithian selbst sowie 2-mono- und 2,4,6- trisubstituierte Trithiane lassen sich mit n-Butyllithium in Tetrahydrofuran metallieren. Umsetzung der Lithiumderivate mit Elektrophilen führt zu höher substituierten Trithianen, die teilweise in reiner Form isoliert werden können. Die NMR-Spektren der erhaltenen Produkte bei Raumtemperatur werden beschrieben. Quecksilber(II)-assistierte Solvolyse von alkylierten Trithianen führt zu Carbonyl-verbindungen oder deren O-Acetalen unter „Herauslösung“ des höchstsubstituierten C-Atoms, was die Verwendung von Lithiotrithianen als nucleophile Acylierungsmittel ermöglicht. Vor- und Nachteile gegenüber der Dithian-Methode werden diskutiert.
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 107 (1974), S. 1371-1379 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Oxidative Addition Reactions of Nitroalkanes to Tetrakis(triphenylphoshine)platinum(0)The oxidative addition of nitromethane to Pt(PPh3)4 in polar protic solution provides a convenient and safe method for the preparation of trans-(Ph3P) 2Pt(CNO)2 Pt(CNO2)(3). From Pt(PPh3)4 and nitromethane or 2-nitropropane cis-(Ph3P) 2Pt(NO2)2 (2) is obtained. The reactions of Pd(PPh3)4 or Rh(PPh3)2CO)Cl with CH3NO2 or some of its derivatives afford isocyanato compounds. Formaidoxime hydrochloride reacts with Pt(PPh3)4 to give trans-(Ph3P)2Pt-(CN)Cl (4).
    Notes: Die oxidative Addition von Nitromethan an Pt(PPH3)4 in polarem, protischem Medium liefert gefahrlos und in guter Ausbeute trans-(Ph 3P)2Pt(CNO)2 (3). Aus Pt(PPh3)4 und Nitromethan bzw. 2-Nitropropan wird cis-(Ph3P)2Pt(NO2)2 (2) erhalten. Die Umsetzungen von Pd(PPh 3)4 oder Rh(PPh3)2(CO)Cl mit Nitromethan oder Methylnitrolsäure führen zu Isocyanatoverbindungen. Formaldoxim-hydrochlorid reagiert mit Pt(PPh 3)4 zu trans-(Ph3P)2Pt(CN)Cl (4).
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 107 (1974), S. 1380-1388 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions of trans-Difulminatobis(triphenylphosphine)platinum(II)The thermally very stable fulminato complex (Ph3P)2Pt(CNO)2 (1) rearranges under mild conditions to the isomeric isocyanato complex (Ph3P)2Pt(NCO)2 in the presence of organic carbonyl compounds which act as catalysts. (Ph3P)2Pt(NCS)2 is obtained from 1 and organic thiocarbonyl compounds. 1 is reduced by phosphines to the corresponding cyanide trans-(Ph3P)2Pt(CN)2. The safe preparation of a number of fulminato complexes (R3E)2M(CNO)2 (M=Pd, Pt; E=P, As, sb), (Ph3P)2Pt(X)CNO (X + H, Me, CN, NCO), and (Ph3P)2Rh(CO)CNO by use of [AsPh4]CNO is reported.
    Notes: Das thermisch sehr stabile (PhP)2Pt(CNO)2 (1) läßt sich katalytisch in Gegenwart von organischen Carbonylverbindungen unter milden Bedingungen zur Isocyanatoverbindungen (Ph3P)2Pt(NCO) 2 isomerisieren. 1 liefert mit organischen Thiocarbonylverbindungen (Ph3P)2Pt(NCS)2. Mit Phosphinen wird 1 zur entsprechenden Cyanoverbindung trans-(Ph3P)2Pt(CN)2 reduziert. Über die gefahrlose Darstellung verschiedener gemischter Fulminatokomplexe (R3E)2M(CNO)2 (M=Pd, Pt; E=P, As, Sb), (Ph3P)2Pt(X)CNO (X=H, Me, CN, NCO) und (Ph3P)2Rh(CO)CNO unter Verwendung von [AsPh 4]CNO wird berichtet.
    Additional Material: 2 Tab.
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 107 (1974), S. 3476-3485 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Platinum as an Amino Protecting Group: Platinum (IV) Complexes with α-Aminoacyl ChloridesChlorination of the (α-amino acid)platinum(II) compounds trans- Cl2Pt(NH2CHRCO2H)2 and Cl2Pt(NH2CH(CO2H)CH2CH2SR) by PCl5 leads to the (aminoacyl chloride)platinum(IV) complexes 1 and 2. The oxidative addition of the coordinated N-protected amino acyl chloride in 1 and 2 to the platinum(0) compound (C2H4)Pt(PPh3)2 affords the chloro-α-aminoacyl complexes 3 and 6, respectively.
    Notes: Durch Chlorierung der (α-Aminosäure)platin(II)-Verbindungen trans-Cl2Pt(NH2CHRCO2H)2 und Cl2Pt(NH2CH(CO2H)CH2CH2SR) mit PCl5 werden die Aminosäurechlorid-Komplexe von Platin(IV) 1 und 2 erhalten. Die oxidative Addition der N-geschützten Aminosäurechlorid- Liganden in 1 und 2 an die Platin(0)-Verbindung (C2H4)Pt(PPh3)2 liefert die Chloro-α-aminoacyl-Komplexe 3 und 6.
    Additional Material: 2 Ill.
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 107 (1974), S. 2434-2439 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions of Planar Isocyanato-d8-Metal Complexes with SO2, DMSO, and CS2 in the Presence of MethanolThe isocyanato complexes (R3P)2M(NCO)2 (M = Pd, Pt) react with SO2 and methanol to give methoxysulfonyl complexes 1 and 2. (Ph3P)2Pd(NCO)2 affords with SO2 or DMSO in methanol probably polynuclear complexes [(Ph3P)PdL]n 4 an d5 (L == SO2, · DMSO). Reaction with CS2 and methanol yields the dithiocarbonate complexes 7. The adducts of (Ph3 P)2Pd(NCO)2-1r(CO)X(X =N3, NCO) with one (8) and two SO2 ligands (9) as well as (Ph3P)2Pd(NCO)2 · 2SO2 (10) and (Ph3P)2Ir(CO)X · DMSO (11) are described.
    Notes: Die Isocyanato-Komplexe (R3P)2M(NCO)2 (M = Pd,Pt) setzen sich mit SO2 und Methanol zu Methoxysulfonyl-Komplexen 1 und 2 um. (Ph3P)2Pd(NCO)2 liefert mit SO2 oder DMSO in Methanol vermutlich mehrkernige Komplexe [(Ph3P)PdL]n 4 und 5 (L = SO2, DMSO). Mit CS2 in Gegenwart von Methanol entstehen die Dithiocarnbonato- Verbindungen 7. Die Addukte von (Ph3P)2Ir(CO)X (X = N3,NCO) mit einem (8) oder zwei SO2 als Liganden (9) sowie (Ph3P)2Pd(NCO)2 · 2 SO2 (10) und (Ph3P)2Ir(CO)X · DMSO (11) werden beschrieben.
    Additional Material: 2 Tab.
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 86 (1974), S. 822-823 
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 86 (1974), S. 385-386 
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
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  • 8
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Tab.
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 46 (1974), S. 127-131 
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Lösungsakkumulatoren sind Sekundärbatterien, die aus Elektroden 1. Art aufgebaut sind, im Gegensatz zu den konventionellen Systemen, die Elektroden 2. Art enthalten. Als wichtigster Vorteil ergibt sich die vollständige Ausnutzung der aktiven Massen. Daraus folgt eine stark verbesserte Energie- und Leistungsdichte gegenüber vergleichbaren Systemen, bei denen die Aktivmassen stets als feste Phasen vorliegen. Auch die Belastbarkeit mit hohen Stromdichten, das Tieftemperaturverhalten und die Lebensdauer der Systeme werden verbessert. Die Stellung des Lösungsakkumulators in der Reihe der Systeme mit wäßrigem Elektrolyten wird diskutiert. Die praktikablen aktiven Massen und ihre Kombinationsmöglichkeiten werden behandelt sowie experimentelle Ergebnisse am System Pb/PbO2/HClO4 mitgeteilt.
    Additional Material: 3 Ill.
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 46 (1974), S. 879-880 
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
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