ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Chemistry  (37)
  • General Chemistry  (28)
  • Wiley-Blackwell  (37)
  • American Chemical Society
  • Molecular Diversity Preservation International
  • 1985-1989  (37)
  • 1987  (37)
Collection
Keywords
Publisher
  • Wiley-Blackwell  (37)
  • American Chemical Society
  • Molecular Diversity Preservation International
Years
  • 1985-1989  (37)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Organische Synthesen mit Übergangsmetallkomplexen, 231) Bicyclische 3-Imidazoline aus primären Isocyaniden und Alkenylcarben-Komplexen durch metallinduzierte anomale Insertion einer C=N- in eine α-CH-Bindung des Isocyanids (1987)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 120 (1987), S. 1287-1291 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Organic Syntheses via Transition Metal Complexes, 231). - Bicyclic 3-Imidazolines from Primary Isocyanides and Alkenylcarbene Complexes by a Metal-Induced Anomalous Insertion of a C=N- into an α-CH Bond of the IsocyanideAlkenylcarbene complexes 1 react smoothly with one equivalent of methyl- and primary isocyanides 2 to give 1:1 adducts 3, which contain C-alkenyl ketenimine ligands. To these a second molecule of 2 may be added in a [4 + 1] fashion with formation of bis-(imino)cyclopentene complexes 6 or - in a competing reaction path - with induction of a second spontaneous ring closure to 3-imidazoline complexes 4/5 by an insertion of 2 into the α-CH bond of 3. Complexes 4-6 were characterized spectroscopically, the 3-imidazoline complex 4a also by an X-ray analysis. In competition with the addition of 2c to 3c an isomerisation of 3c to the α-alkoxycyanide complex 9a is observed involving an N/Cmigration of the N-allyl group. Steric factors exhibit strong influences on the course of the different competition reactions.
    Notes: Alkenylcarben-Komplexe 1 bilden mit Methyl- bzw. einem primären Isocyanid 2 1:1-Addukte 3, die einen C-Alkenylketenimin-Ligand enthalten. An diesen läßt sich ein zweites Molekül 2 addieren unter [4 + 1]-Cycloaddition zu Bis(imino)cyclopenten- 6 bzw. unter weiterem Ringschluß zu 3-Imidazolin-Komplexen 4/5 durch metallinduzierte Insertion von 2 in eine α-CH2N-Bindung von 3. Die Komplexe 4-6 wurden spektroskopisch, der 3-Imidazolin-Komplex 4a zusätzlich durch eine Kristallstrukturanalyse charakterisiert. Neben einer Addition von 2c an 3c wird eine Isomerisierung von 3c zum α-Alkoxycyanid-Komplex 9a unter N/C-Wanderung des N-Allylrests beobachtet. Sterische Faktoren beeinflussen entscheidend das Zusammenspiel sämtlicher Konkurrenzreaktionen.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19871200804
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Synthese eines heteroatomstabilisierten Rhodiumcarbenkomplexes durch Reaktion von CpRh(CO)2 mit (Butadien)zirconocen (1987)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 120 (1987), S. 1763-1765 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Synthesis of a Heteroatom-Stabilized Rhodiumcarbene Complex by Reaction of CpRh(CO)2 with (Butadiene)zirconocene(η4-Butadiene)zirconocene reacts at room temperature in toluene with CpRh(CO)2 to give the metallacyclic [(π-allyl)zirconoxy]rhodium carbene complex Cp2Zr(C4H6)(OC=)Rh(CO)Cp 5. The structure of 5 was determined by X-ray analysis. The Rh-carbene unit Cp(CO)Rh=C(R)OM is almost planar, featuring the —O[Zr] and Cp groups in a Z orientation at the Rh=C moiety [dRh—C(carbene) = 1.925(3) Å].
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19871201024
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Darstellung und Charakterisierung von Thiagerma- und Selenagermaadamantanen (1987)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 120 (1987), S. 1045-1048 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: In the presence of Al2Cl6 RGeCl3 reacts with (H3Si)2E to yield (RGe)4E6(R=Et, CF3, E=Se). X-ray structure determinations proved for (CF3Ge)4E6(E=S, Se) and adamantane structure.
    Notes: In Gegenwart von Al2Cl6reagiert RGeCl3 mit (H3Si)2E zu den neuen Verbindungen (RGe)4E6 (R=Et, CF3, E = S; R=CF3, E=Se). Kristallstrukturbestimmungen zeigen, daß (CF3Ge)4E6 (E=S, Se) Adamantanstruktur besitzen.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19871200626
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Nickelacyclobutabenzole durch oxidative Addition von 7,7-Bis(trimethylsilyl)cyclopropabenzol an Nickel(0)-Komplexe (1987)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 120 (1987), S. 471-475 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The synthesis of 7,7-bis(trimethylsilyl)cyclopropabenzene (2) from cyclopropabenzene (1) is reported. The oxidative addition of 2 to tris(ethene)nickel(0) (3) in the presence of chelating ligands occurs with insertion of the nickel atom into the C—C-single bond of the cyclopropabenzene three-membered ring to give nickelacyclobutabenzene derivatives 4, Ligand exchange of the tetramethylethylenediamine in 4a by phosphorus ligands occurs smoothly to give nickelacyclobutabenzene species. 5. - An X-ray structure analysis of 4a was performed.
    Notes: Die Synthese des 7,7-Bis(trimethylsilyl)cyclopropabenzols (2), ausgehend von Cyclopropabenzol (1), wird beschrieben. Die oxidative Addition von 2 an Tris(ethen)nickel(0) (3) in Gegenwart von chelatisierenden Aminliganden liefert unter Insertion der Nickel-atome in eine der C—C-Einfachbindungen des Cyclopropabenzol-Dreiringes Nickelacyclobutabenzole des Typs 4. In einer Ligandenaustauschreaktion läßt sich das Tetramethylethylendiamin im Komplex 4a durch Phosphorliganden glatt unter Bildung von Nickelacyclobutabenzolen des Typs 5 verdrängen. - Von 4a wurde eine Röntgenstrukturanalyse ausgeführt.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19871200405
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Organylkomplexe von (η5-Cyclopentadienyl)(triorganophosphan)eisen (1987)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 120 (1987), S. 1987-2002 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Organyl Complexes of (η-Cyclopentadienyl)(triorganophosphane)ironA series of organyliron complexes of the type Cp(L)2Fe—R (Cp = C5H5, C5H4Me, C5Me5; L = PhnMe3-nP, n = 0-3) (R = Me, Et, Bu, Ph, CH2CH2Ph, CH=CH2) have been prepared either from the corresponding iron chlorides (1-7) and organomagnesium compounds or from Cp(COD)FeLi (8, 9), organic halide, and phosphane. The thermal stability of the ethyliron complexes 17-24 towards β-H elimination (to give the (η2-ethylene)iron hydrides 37-39 or the Cp(L)2FeH compounds 40-48) increases with the basicity of the phosphane ligand and decreases with increasing methyl-substitution of the Cp ligand. The vinyliron compounds 29-32, 54 and 55 react with ethylene with insertion into the vinyl-Fe bond to give the (η3-crotyl)iron complexes 56-61 as the result of isomerization. The (η1, η2-alkenyl)iron compounds Cp(Me3P)Fe-[CH2]3-CH=CH2(Cp=C5H5 (62), C5Me5 (63) and (C5Me5)(Me3P)Fe-o-C6H4CH2CH=CH2 (67) were isolated and are stable at 20°C.
    Notes: Es wurde eine Reihe von Organyleisen-Komplexen des Types Cp(L)2Fe—R (Cp = C5H5, C5H4Me, C5Me5; L = PhnMe3-nP, n = 0-3) (R = Me, Et, Bu, Ph, CH2CH2Ph, CH=CH2) teilweise über die entsprechenden Eisenchloride (1-7) und Organomagnesium-Verbindungen, zum anderen Teil aus Cp(COD)FeLi (8, 9), Organohalogenid und Phosphan dargestellt. Die thermische Stabilität der Ethyleisen-Komplexe 17-24 gegenüber ß-H-Eliminierung zu den (η2-Ethylen)eisenhydriden 37-39 bzw. den Verbindungen Cp(L)2FeH (40-48) nimmt mit der Basizität des Phosphanliganden zu, jedoch mit zunehmender Methylsubstitution am Cp-Liganden ab. Die Vinyleisenverbindugen 29-32, 54, 55 reagieren mit Ethylen unter Insertion in die Vinyl-Fe-Bindung. Nach Isomerisierung entstehen die (η3-Crotyl)eisen-Komplexe 56-61. Als bei 20°C stabile (η1, η2-Alkenyl)eisen-Verbindungen wurden Cp(Me3P)Fe-[CH2]3-CH =CH2(Cp=C5H5 (62), C5Me5 (63) und (c5Me5)(ME3P)Fe-oC6H4CH2=CH2 (67) isoliert.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19871201210
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Pentamethylcyclopentadienyl-übergangsmetallkomplexe, XI Metallorganische Monoglyoximato-Komplexe von Co und Rh (1987)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 120 (1987), S. 979-985 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reaction of the halide complexes [Cp*M(μ-Cl)Cl]2,M=Co, Rh, Cp*=η5-C5Me5, with dimethylglyoxime (dmgH2) gives organometallic monoglyoxime complexes Cp*Co(dmgH)Cl (2a) and [Cp*Rh(dmgH2)Cl]Cl (2b) with an η2-dimethylglyoximato(-1) or an η2-dimethylglyoxime ligand, the structures of which were analysed by X-ray crystallography. Potentiometric titration yielded pK5 values for the deprotonation of the glyoxime = N-OH groups and the metal bound water molecule in the hydrolyzed forms. Electroanalytical investigations show the compounds to be potentially useful mediators for catalytic proton reduction to hydrogen.
    Notes: Durch Umsetzung der Halogenide [Cp*M(μ-Cl)Cl]2, M=Co, Rh, Cp*=η5-C5Me5, mit Dimethylglyoxim (dmgH2) entstehen die Monoglyoxim-Komplexe Cp*Co(dmgH)Cl (2a) bzw. [Cp*Rh(dmgH2)Cl]Cl (2b) mit η2-Dimethylglyoximato(-1) bzw. η2-Dimethylglyoxim als Ligand, für die Kristallstrukturanalysen angefertigt wurden. Durch potentiometrische Titration wurden die pKs-Werte der Deprotonierung des dmgH2-Liganden und des metallgebundenen Wassers bestimmt. Elektroanalytische Untersuchungen weisen die Komplexe als potentielle Redoxkatalysatoren für die Protonenreduktion aus.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19871200615
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Ein Modell zur Beschreibung reversibler Copolymerisationen (1987)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 188 (1987), S. 2163-2175 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The reversible copolymerization is described by a model derived from simple kinetic assumptions. The copolymerization behaviour of a system can be calculated from 3 experimental parameters: composition of the monomer mixture, composition and diade distribution of the copolymer. Four additional model constants represent the connection with the thermodynamics of reversible copolymerization. The model leads to the same results as the Monte-Carlo method described in the literature. The temperature dependence of reversible copolymerizations can be simulated by the model with the thermodynamic values of the four elementary reactions.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1987.021880913
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Über 1,2-Umlagerungen und C—H-Einschubreaktionen Acyclischer AlkylidencarbeneHerrn Prof. Dr. Dr. H. G. O. Becker zum 65. Geburtstag gewidmet (1987)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 329 (1987), S. 49-54 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: On 1.2-Shift Reactions and C—H-Insertions of Acyclic Alkylidene CarbenesTwo series of acyclic terminal vinyl bromides (1…4 and 5…7) were tested in the reaction with potassium tert-butoxide as precursors of alkylidene carbenes. As expected 1 up to 4 only give 1-alkynes whereas the 2-methylated vinyl bromides 5, 6 and 7 yield 1-methylated cyclopentenes predominantly besides 2-alkynes. The formation of cyclopentenes indicates a reaction route via alkylidene carbenes and 1,5-C—H-insertion reactions, that of 2-alkynes is convincing evidence for 1,2-alkyl shift reactions in 2-methyl substituted alkylidene carbenes. The selectivity of 1,5-C—H-insertion depends on the degree of alkyl substitution of the C-5-atom. At 240°C the selectivity is 1°:2°:3° ≈ 1:54:240.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19873290107
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Oxacycloalkane in der polymerchemie. VIII. Über Sequenzlängen in Copoly(1,3-dioxacyclanen)Teil VII: siehe [1] (1987)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 38 (1987), S. 83-87 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: The diade distribution of copoly(l,3-dioxacyclanes) synthesized by cationic ring-opening polymerization at 293 K in toluene (initiator HClO4) was studied by 1H-NMR analysis. As a result sequence lengths of a typical statistic copolymer were found. Therefore, the calculation of sequence lengths from copolymerization parameters is not allowed. Copolymers Synthesized by step-polymerization have also statistic sequence lengths. These facts are attributed to by-reactions.
    Notes: Mit der 1H-NMR-Spektroskopie wird die Diadenverteilung von Copoly(1,3-dioxacyclanen), die durch kationische Ringöffnungspolymerisation bei 293 K in Toluen (Initiator HClO4) ehalten wurden, untersucht. Es werden für statistische Copolymere typische Sequenzlängen gefunden. Die Berechnung der Sequenzlängen aus den Copolymerisationsparametern ist unzulässig. Durch Stufenpolymerisation hergestellte Copolymere weisen ebenfalls statistische Sequenzlängen auf. Diese Tatsachen werden auf Nebenreaktionen zurückgeführt.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1987.010380117
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Nickelkomplexe mit PropellanstrukturDiese Arbeit wurde von der Deutschen Forschungsgemeinschaft und vom Fonds der Chemischen Industrie gefördert. (1987)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 99 (1987), S. 72-73 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19870990117
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...