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  • 1980-1984  (12)
  • 1945-1949
  • 1900-1904
  • 1982  (12)
  • Inorganic Chemistry  (10)
  • Polymer and Materials Science  (2)
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  • 1980-1984  (12)
  • 1945-1949
  • 1900-1904
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Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Characterization and morphology of thermoplastic interpenetrating polymer networks based on polystyrene and polystyrene-polyisoprene three-block copolymers (1982)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 183 (1982), S. 249-258 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Semi-interpenetrating polymer networks based on polystyrene and polystyrene-polyisoprene three-block copolymers (SIS) were prepared by anionic polymerization. Factors affecting synthesis, such as composition, molecular weight of either the unattached SIS or the polystyrene between crosslinks, elastomer content, have been varied. Their effect on network formation was examined by extraction experiments and swelling measurements. Their morphology was investigated by means of electron microscopy.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1982.021830124
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  • 2
    Electronic Resource
    Electronic Resource
    Glass transition temperatures of ABA poly(styrene-b-isoprene) block copolymers by differential scanning calorimetry (1982)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Physics Edition 20 (1982), S. 389-398 
    Details
    ISSN: 0098-1273
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The glass transition behavior of two sets of ABA poly(styrene-b-isoprene) block copolymers was examined by differential scanning calorimetry. In one series, the triblock copolymers had different total molecular weights and the same (30 wt %) polyisoprene content, in the other, the molecular weight was constant (30,000 g/mol) and the elastomer content was the variable. For all triblock copolymers studied, the data show an inward shift for the glass transition temperatures Tg of the corresponding homopolymers. This shift increases for the rigid-phase Tg as the polystyrene block length decreases. Depending on their molecular characteristics, two, three, or only one Tg were found. The third Tg was interpreted in terms of the existence of an interphase. Some of these conclusions could be confirmed by transmission electron microscopy.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1982.180200303
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  • 3
    Electronic Resource
    Electronic Resource
    NMR-spektroskopische Untersuchungen an 15N-markierten Oxocyclophosphazanen (1982)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 490 (1982), S. 121-128 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: NMR Spectroscopic Studies of 15N Labelled OxocyclophosphazanesThe completely 15N labelled cyclophosphazanes (15NMeP(OMe)O)3, (15NEtP(OEt)O)3, and (15NMeP(OMe)O)4 were prepared by rearrangement of the corresponding alkoxyphosphazenes and their 31P- and 15N-NMR spectra were investigated. On the case of the trimer compounds spectra of the ABB′XX′Y spin type were obtained; all coupling constants are relevant, and like the 15N chemical shifts they are found only by means of spectra simulations. The relative signs of the coupling constants 1JPN, 2JPP, 2JNN, and 3JPN were also obtained.
    Notes: Die vollständig 15N-markierten Cyclophosphazane (15NMeP(OMe)O)3, (15NEtP(OEt)O)3 und (15NMeP(OMe)O)4 wurden aus den entsprechenden Alkoxyphosphazenen dargestellt und sowohl 31P- als auch 15N-NMR-spektroskopisch untersucht. Bei den trimeren Verbindungen wurden Spektren vom Spintyp ABB'XX'Y erhalten; alle Kopplungskonstanten sind relevant, sie können wie die 15N-chemischen Verschiebungen nur auf dem Wege der Spektrensimulation erhalten werden. Es ergeben sich auch die relativen Vorzeichen für die Kopplungskonstanten 1JPN, 2JPP, 2JNN und 3JPN.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19824900114
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  • 4
    Electronic Resource
    Electronic Resource
    Cs2LiLuCl6: Zwei Formen mit zwei Umwandlungen im festen Zustand (1982)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 485 (1982), S. 133-140 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Cs2LiLuCl6: Two Modifications with Two Transitions in the Solid StateAt ambient temperature Cs2LiLuCl6 crystallizes with the trigonal HT-K2LiAlF6 structure type („6L-type“ form I, L). With increasing temperature a reversible, reconstructive solid to solid first order phase transition to the cubic-face centered K2NaAlF6-type („elpasolite“, form II) occurs at ≍ 325°C with a negative volume discontinuity. Above ≍ 510°C up to the melting point (≍ 675°C) again the 6L-type is observed (form I, H). The likewise reversible phase transition proceeds with a positive volume discontinuity. In both phase transitions 60° rotations occur within densest packed layers with [0 0.1] as rotation axis.
    Notes: Cs2LiLuCl6 kristallisiert bei Raumtemperatur im trigonalen HT-K2LiAlF6-Typ („6 L-Typ“ Form I, L). Bei Temperaturerhöhung beobachtet man bei ≍ 325°C eine reversible, rekonstruktive fest-fest-Umwandlung 1. Art unter Volumenabnahme in den kubisch-flächenzentrierten K2NaAlF6-Typ („Elpasolith“ Form II). Oberhalb ≍ 510°C tritt bis zum Schmelzpunkt (≍ 675°C) wiederum der 6L-Typ auf (Form I, H). Bei dieser ebenfalls reversiblen Umwandlung nimmt das Volumen zu. Die Phasenumwandlungen verlaufen über Drehsprünge (60°) um [0 0.1] innerhalb „dichtest-gepackter“ Schichten.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19824850114
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  • 5
    Electronic Resource
    Electronic Resource
    Kristall- und Molekülstruktur von Hydridobis-[1,2-bisdiphenylphosphanoethan]distickstofftechnetium(I) (1982)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 494 (1982), S. 91-97 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Crystal and Molecular Structure of Hydridobis[1,2-bis(diphenylphosphinoethane)]dinitrogen-technetium(I)The crystal and molecular structure of the title compound HTcN2(diphos)2[diphos = (C6H5)2PCH2CH2P(C6H5)2] has been determined by X-ray analysis and 1H NMR spectra. Crystals are monoclinic, space group P21/n, with cell dimensions a = 11.090(3), b = 24.550(5), c = 16.379(4) Å, β = 96.02(2)°.The technetium atom is octahedrally co-ordinated with the hydridic hydrogen trans to the dinitrogen group. The Tc—N distance is 2.05(1) Å, the Tc—H distance is 1.7(1) Å. The Tc—P distances (2.359(7) Å) are remarkably shorter than in technetium complexes with mono-dentate phosphine ligands. The existence of the hydridic hydrogen is also confirmed by 1H NMR (δ = -10.08 ppm).
    Notes: Die Kristall- und Molekülstruktur der im Titel genannten Verbindung HTcN2 (diphos)2 [diphos = (C6H5)2PCH2CH2P(C6H5)2] wurde mittels Röntgenstruktur- und 1H-NMR-Spektroskopie ermittelt. Die Kristalle sind monoklin mit a = 11,090(3), b = 24,550(5), c = 16,379(4) Å, β = 96,02(2)°, Raumgruppe P21/n.Das Technetiumatom ist oktaedrisch koordiniert, der Hydrid-Wasserstoff befindet sich zum Distickstoff-Liganden in trans-Stellung. Der Bindungsabstand Tc—N beträgt 2,05(1) Å, der Tc-H-Abstand 1,7 (1) Å. Bemerkenswert kürzer ist der Abstand Tc—P (2,359(7) Å) im Vergleich zu Komplexen mit einzähnigen Phosphanliganden.Im 1H-NMR-Spektrum tritt bei δ = -10,08 ppm ein Signal für den Hydridwasserstoff auf.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19824940111
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  • 6
    Electronic Resource
    Electronic Resource
    Intramolekulare Beweglichkeit von Phosphin-3η-allylpalladiumchlorid-Komplexen (1982)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 494 (1982), S. 189-195 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Intramolecular Mobility of Phosphin-3η-allyl Palladium Chloride ComplexesThe diastereomers of the complexes cis- and trans-2.3-diphenyl-1.3-oxaphosphorinan-3η-allyl palladiumchloride interchange. The activation parameters of the diastereomerization are estimated by line-shape analysis of the 31P - NMR signals.The exchange of allyl protons is described by 16 permutations involved in three graphes of the proposed seven modes of intramolecular movement.The cross-peaks in the 2D-exchange-1H - NMR spectrum display the exchanging protons.The results suggest a π-σ-transition together with a trigonal-bipyramidal arrangement of ligands in the transition state.
    Notes: Die Diastereomere der Komplexe cis- und trans-2,3-Diphenyl-1,3-oxa-phosphorinan-3η-allylpalladiumchlorid wandeln sich ineinander um. Die Aktivierungsparameter für diese Diastereomerisierung werden durch Linienformanalyse der 31P-NMR-Signale bestimmt.Der Positionswechsel der Allylprotonen wird durch 16 Permutationen beschrieben und in je drei Graphen den sieben vorgeschlagenen intramolekularen Bewegungsmechanismen zugeordnet. Aus den cross-peaks im 2D-Austausch-1H - NMR-Spektrum werden die miteinander im Positionswechsel befindlichen Protonen bestimmt.Die Ergebnisse sprechen für einen π-σ-Übergang mit trigonalbipyrymidaler Ligandenanordnung im Übergangszustand.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19824940124
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  • 7
    Electronic Resource
    Electronic Resource
    KDy2Cl7 und RbDy2Cl7, Phyllochlorodysprosate(III) mit flächen- und kantenverknüpften einfach bekappten trigonalen PrismenProfessor Rudolf Hoppe zum 60. Geburtstage gewidmet (1982)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 491 (1982), 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: KDy2Cl7 and RbDy2Cl7, Phyllochlorodysprosates(III) with Face- and Edge-Sharing Monocapped Trigonal PrismsKDy2Cl7 (monoclinic, P21/a, Z = 4; a = 1 273.9(8), b = 688.1(5), c = 1 262.1(6) pm; γ = 89.36(3)°) and RbDy2Cl7 (orthorhombic, Pnma, Z = 4; a = 1 288.1(3), b = 693.5(2), c = 1 267.2(3) pm) show as hetto- and aristotype, respectively, structural arrangements unknown so far: monocapped trigonal prisms [DyCl7] are connected via common faces to form [Dy2Cl11] groups, these via common edges to form layers ∞2[(DyCl3/2fCl4/2e)2]. The layers are stacked in [100] direction and held together by K+ and Rb+, respectively.
    Notes: KDy2Cl7 (monoklin, P21/a, Z = 4; a = 1 273,9(8), b = 688,1(5), c = 1 262,1(6) pm; γ = 89,36(3)°) und RbDy2Cl7 (orthorhombisch, Pnma, Z = 4; a = 1 288,1(3); b = 693,5(2); c = 1 267,2(3) pm) zeigen als Hetto- bzw. Aristotyp einen bislang unbekannten strukturellen Aufbau: einfach bekappte trigonale Prismen [DyCl7] werden über eine Dreiecksfläche zu [Dy2Cl11]-Gruppen, diese über Kanten mit je vier weiteren solchen Gruppen zu einer Schicht ∞2[(DyCl3/2fCl4/2k)2] verknüpft. Längs [100] sind die Schichten gestapelt und werden über K+ bzw. Rb+ zusammengehalten.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19824910128
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  • 8
    Electronic Resource
    Electronic Resource
    Zur Kenntnis der Hexachloroniobate(V), -tantalate(V) und -antimonate(V). AIMVCl6(AI = Na, K, Tl, NH4, Rb, Cs; MV = Nb, Ta, Sb) (1982)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 493 (1982), S. 65-76 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Hexachloroniobates(V), -tantalates(V), and -antimonates(V): AIMVCl6 (AI = Na, K, Tl, NH4, Rb, Cs; MV = Nb, Ta, Sb)Hexachlorometallates(V) AINbCl6, AITaCl6, and AISbCl6 (AI = Na, K, Tl, NH4, Rb, Cs) have been prepared by reaction of the binary components at 280°C (niobates), 300°C (tantalates), and in POCl3 solution (antimonates), respectively, and were investigated by Raman spectroscopy and X-rays with the Guinier-Simon technique. The low-temperature modifications of AIMCl6 (AI = K, Tl, NH4, Rb, Cs with the exception of KNbCl6) are isotypic to CsWCl6 with isolated octahedra ∞0[MCl6]. The high-temperature modifications crystallize cubic face-centered. Raman spectra of KNbCl6, NaNbCl6 and NaTaCl6 support a formulation like e. g. K2[Nb2Cl10]Cl2 with isolated edgesharing bioctahedra ∞0[(NbCl4/1tCl2/2e)2].
    Notes: Die Chloride AINbCl6, AITaCl6 und AISbCl6 (AI = Na, K, Tl, NH4, Rb, Cs) werden aus den binären Komponenten bei 280°C (Niobate), 300°C (Tantalate) bzw. aus POCl3-Lösung (Antimonate) dargestellt und ramanspektroskopisch bzw. röntgenographisch (Guinier-Simon-Technik)untersucht. Die Tieftemperaturformen von AIMCl6 (AI = K, Tl, NH4, Rb, Cs, außer KNbCl6) sind mit CsWCl6 isotyp (isolierte Oktaeder ∞0[MCl6]). Die Hochtemperaturformen kristallisieren kubisch-flächenzentriert. Ramanspektren von KNbCl6, NaNbCl6 und NaTaCl6 sprechen für eine Formulierung gemäß z. B. K2[Nb2Cl10]Cl2 mit „isolierten“, kantenverknüpften Doppeloktaedern ∞0[(NbCl4/1tCl2/2k)2].
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19824930109
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  • 9
    Electronic Resource
    Electronic Resource
    Beiträge zur Untersuchung anorganischer nichtstöchiometrischer Verbindungen. XIV. Oxydationsprodukte von orthorhombischem Nb12O29 Elektronenoptische Untersuchung (1982)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 484 (1982), S. 77-97 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions to the Investigation of Inorganic Non-stoichiometric Compounds. XIV. Oxidation Products of Orthorhombic Nb12O29, Electron Optical InvestigationAn electron optical investigation shows that the orthorhombic starting material Nb12O29(BII) is well ordered. The oxidation products Nb2O5(Ox1BII) and Nb2O5(Ox2BII) are different from each other in structures as well as in their reactions. Nb2O5(Ox1BII) is unstable in the electron beam and differs from BII by characteristic point-defects. The radiation load can lead to the reduction to BII or to a transition into a defect structure with R-type-tunnels. The not well ordered structure of Nb2O5(Ox2BII) is stable in the electron beam. Characteristic is the sequence of [2×5] and [3×4] blocks, the latter in two different orientations. The observed composition O/Nb = 2.500 can be described by the present structural modell assuming vacant niobium tetrahedral sites. The large structural differences between the oxidation products of the orthorhombic and the monoclinic Nb12O29 are remarkable.
    Notes: Wie die elektronenoptische Untersuchung zeigt, ist das orthorhombische Ausgangsprodukt Nb12O29(BII) gut geordnet. Die Oxydationsprodukte Nb2O5(Ox1BII) und Nb2O5(Ox2BII) sind strukturell sowie in ihrem Verhalten verschieden. Das im Elektronenstrahl instabile Nb2O5(Ox1BII) unterscheidet sich von BII durch charakteristische Punktdefekte. Die Strahlbelastung kann zu einer Reduktion zu BII oder zum Übergang in eine Defektstruktur mit R-Typ-Lücken führen. Die wenig geordnete Struktur von Nb2O5(Ox2BII) ist im Elektronenstrahl beständig; charakteristisch ist die Abfolge von [2×5]- und [3×4]-Blöcken, letztere in zwei verschiedenen Orientierungen. Die beobachtete Zusammensetzung O/Nb = 2,500 läßt sich im vorliegenden Strukturmodell mit einer Unterbesetzung der Nb-Tetraederpositionen beschreiben. Bemerkenswert sind die erheblichen strukturellen Unterschiede zwischen den Oxydationsprodukten von orthorhombischem und monoklinem Nb12O29.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19824840107
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  • 10
    Electronic Resource
    Electronic Resource
    Beiträge zur Untersuchung anorganischer nichtstöchiometrischer Verbindungen. XIII. Oxydationsprodukte von monoklinem Nb12O29 Elektronenoptische Untersuchung (1982)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 484 (1982), S. 53-76 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Contributions to the Investigation of Inorganic Non-stoichiometric Compounds. XIII. Oxidation Products of Monoclinic Nb12O29, Electron Optical InvestigationThe electron optical investigation shows that the starting material Nb12O29(mon.) is well ordered and that the oxidation products Nb2O5(Ox1BI) and Nb2O5(Ox2BI) have different structures. Nb2O5(Ox1BI) has a similar structure as Nb12O29(mon.), however differs from the latter by characteristic point defects, which in the electron microscope easily disappear by reduction. Nb2O5(Ox2BI) has not a well ordered structure; characteristic are rows of [2×n]-blocks which on the average are separated by five [3×n]-blocks. The average block length is n = 4 octahedra. The observed composition O/Nb = 2.500 can be explained by a structure model with unoccupied tetrahedral sites of Nb.
    Notes: Die elektronenoptische Untersuchung zeigt, daß das monokline Ausgangsprodukt Nb12O29(BI) gut geordnet ist und daß die bei der Oxydation entstehenden Produkte Nb2O5(Ox1BI) und Nb2O5(Ox2BI) unterschiedliche Strukturen besitzen. Nb2O5(Ox1BI) ist sehr ähnlich aufgebaut wie BI, unterscheidet sich hiervon jedoch durch charakteristische Punktdefekte, die durch Reduktion im Elektronenmikroskop leicht wieder verschwinden. Nb2O5(Ox2BI) besitzt eine wenig geordnete Struktur; charakteristisch sind Reihen von [2×n]-Blöcken, die im Mittel durch fünf [3×ln]-Blöcke voneinander getrennt sind; im Durchschnitt ist die Blocklänge n = 4. Die beobachtete Zusammensetzung O/Nb = 2,500 läßt sich im vorliegenden Strukturmodell durch eine Unterbesetzung der Nb-Tetraederpositionen erklären.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19824840106
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