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  • 1
    ISSN: 1432-0649
    Keywords: 82.50
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract IR laser chemistry of CHF3 is investigated in both neat form and in the presence of Cl2 for carbon-13 enrichment. Infrared multiple-photon dissociation of CHF3 is an order of magnitude more efficient in the scavenged system compared to the neat case. The photolysis of CHF3/Cl2 mixture results in two products, viz., CF2Cl2 and C2F4Cl2 but with different enrichment factors. The parametric studies show that C2F4Cl2 arises due to MPD of CF2Cl2 in secondary photolysis.
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  • 2
    ISSN: 1432-0649
    Keywords: 82.50 ; 33.00
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The dissociation of UF6 sensitized by multiple photon excitation of a series of halomethanes: CF4, CF3Cl, and CF2Cl2 has been investigated. The roles of various experimental parameters like exciting frequency, fluence and pressures of sensitizer/UF6 on the dissociation yield were studied to examine (1) the characteristics of the sensitizer/UF6 system and (2) the coupling of vibrational energy between two molecular systems. The efficiency of the energy transfer process was estimated on the basis of long range dipole-dipole interaction to gain an understanding of the dissociation process.
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 102 (1969), S. 1774-1775 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 101 (1968), S. 3255-3264 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 2α-Methoxycarbonyl-A-nor-lupan (1b) wurde aus Lupeol synthetisiert. Einige Verbindungen, die mehr als eine Sauerstoff-Funktion im Ring A von Lupan tragen, wurden ebenfalls dargestellt.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 615 (1992), S. 149-154 
    ISSN: 0044-2313
    Keywords: Thiazenes ; phosphathiazenes ; cycloadditions ; ring transformations ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Ausgewählte Reaktionen an (R)Ph2PN—S3N3-Heterocyclen: Über das chemische Verhalten und die ReaktivitätDie Umsetzungen der (R)Ph2PN—S3N3-Heterocyclen mit Olefinen wie Norbornadien, Norbornen und Dicyclopentadien haben unterschiedliche Ergebnisse ergeben. Wie mit Ph3PN—S3N3 werden mit (R)Ph2PN—S3N3 (R = C4H8N—, C5H10N—, C6H12N—, CH3NC4H8N— und OC4H8N—) Cycloadditionsverbindungen mit Norbornadien (R)Ph2PN—S3N3 · C7H8 (Ausbeute 41-62%) erhalten, während mit Norbornen und Cyclopentadien unter gleichen Bedingungen keine entsprechenden Addukte gebildet werden. Mit Ph3PN—S3N3 haben sowohl Norbornen wie Dicyclopentadien den ringerweiterten Heterocyclus 1,5-[Ph3PN]2S4N4 in ca. 65% Ausbeute ergeben. Untersuchungen der Zersetzung der Lösungen von (R)Ph2PN—S3N3-Derivaten (R = sek. Amin) führten zur Bildung von (R)Ph2NH2+ X-, während mit R = prim. Amin in ca. 80% Ausbeute der Ph2PS2N3- Heterocyclus erhalten wird. Saure Hydrolyse von (R)Ph2PN—S3N3-Derivaten (R = Aminogruppe) ergibt in allen Fällen Ph2P(O)OH.
    Notes: Reactions of (R)Ph2PN—S3N3 heterocycles with olefins such as norbornadiene, norbornene and dicyclopentadiene have yielded different results. Like Ph3PN—S3N3, (R)Ph2PN—S3N3 (R = C4H8N—, C5H10N—, C6H12N—, CH3NC4H8N— and OC4H8N—) compounds have given the cycloaddition products (R)Ph2PN—S3N3 · C7H8 (yield 41 - 62%) with norbornadiene, while norbornene and dicyclopentadiene have not produced the corresponding adducts under identical conditions. With Ph3PN—S3N3 both norbornene and dicyclopentadiene have given the ring expanded heterocycle, 1,5-[Ph3PN]2S4N4 in ca. 65% yield. The solution phase decomposition studies of (secondary amino) Ph2PN—S3N3 derivatives have lead to the formation of (R)Ph2PNH2+X-, while (primary amino) Ph2PN—S3N3 has given Ph2PS2N3 heterocycle in ca. 80% yield. Acid hydrolysis of (R)Ph2PN—S3N3 derivatives has resulted in the isolation of Ph2P(O)OH in all the cases, where R is an amino group.
    Additional Material: 5 Tab.
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 345 (1966), S. 217-221 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Co(II) bildet mit Thioharnstoff neben einem normalen tetraedrischen Komplex auch einen Komplex mit fünffachkoordiniertem Kobalt.
    Notes: Two five co-ordinated thiourea Co(II) complexes were characterised in addition to a usual tetrahedral complex.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 351 (1967), S. 68-72 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Es wird über einige kovalente Nickel(II)-komplexe mit 4-Vinylpyridin der Zusammensetzung NiLnX2 (L = Pyridin-Ligand; x = Cl-, CNS-; n = 2 und 4) und über das ionische [NiL4](ClO4)2 berichtet. Zu ihrer Charakterisierung werden neben konduktometrischen und magnetischen Messungen auch Infrarotspektren (5000-650 cm-1) herangezogen.
    Notes: Some covalent nickel(II) complexes with 4-vinyl pyridine having the composition NiLnX2 (L = Pyridin-Ligand; x = Cl- and CNS- and n = 2 and 4) are reported in addition to an ionic perchlorate complex, (NiL4)(ClO4)2. Infra-red absorption spectra are recorded in the region 5000-650 cm-1.
    Additional Material: 1 Tab.
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 335 (1965), S. 206-209 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Auf röntgenographischem Wege wird gezeigt, daß das als Pigment Verwendung findende Bariumkaliumchromat(VI) durch Erhitzen oder auch durch Vermahlen bei Zimmertemperatur einer BaCrO4/K2CrO4-Mischung entsteht.
    Notes: X-ray studies of barium potassium chromate pigment prepared by different methods have been made. It is observed that the pigment is produced by heating a mixture of BaCrO4 and K2CrO4 and also by grinding the mixture at room temperature.
    Additional Material: 1 Tab.
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 354 (1967), S. 201-207 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: UO22+-Ionen bilden nach potentiometrischen und spektrophotometrischen Messungen mit N-Hydroxyäthyl-äthylendiamin-triessigsäure und Äthylenglykol-bis(aminoäthyl)-äther-tetraessigsäure 1:1-und 1:2-Komplexe, die zum Teil als basische UO2(OH)-Komplexe vorliegen. Es wurden die Bildungskonstanten ermittelt.
    Notes: Detailed investigations have been carried out of the reaction of uranyl ion with N-hydroxyethyl ethylene-diaminetriacetic acid and ethyleneglycol bis-(2-aminoethyl) ether tetraacetic acid by potentiometric and spectrophotometric methods. Evidence is presented for the formation of 1:1 and 2:1 complexes and the corresponding hydroxy species. The formation constants of all these species were determined by spectrophotometric method.
    Additional Material: 4 Ill.
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