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  • 1985-1989  (9)
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  • 1
    Electronic Resource
    Electronic Resource
    Substituenten-Einfluß auf die lichtinduzierte Isomerisierung des Homofulven-Systems: Photo-Isomerisierung des Singulettangeregten 1,2,3,5-Tetramethyl-4-methylen-endo- und-exo-6-(trifluormethyl)bicyclo[3.1.0]hex-2-ens (1985)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 118 (1985), S. 2681-2691 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Influence of Substituents on the Light-Induced Isomerization of the Homofulvene System: Photo-Isomerization of the Singlet Excited 1,2,3,5-Tetramethyl-4-methylene-endo- and -exo-6-(trifluoromethyl)bicyclo[3.1.0]hex-2-eneSyntheses of the diastereomeric pairs 1,2,3,5-tetramethyl-4-methylene-endo- and -exo-6-(trifluoromethyl)bicyclo[3.1.0]hex-2-ene (endo-1d and exo-1d) as well as [6-D]-endo-1d and [6-D]- exo-1d are reported. Following singlet excitation both diastereomers are isomerized to a mixture of 1,2,3,5-Tetramethyl-6-methylene-endo- and -exo-4-(trifluoromethyl)bicyclo[3.1.0]hex-2-ene (endo-7 and exo-7) as well as [4-D]-endo-7 and [4-D]-exo-7. A mechanism for this - from the singlet excited isomerization of the alkyl-substituted homofulvenes different - reaction path is suggested.
    Notes: Die Synthese der Diastereomeren-Paare 1,2,3,5-Tetramethyl-4-methylen-endo- und -exo-6(trifluormethyl)bicyclo[3.1.0]hex-2-en (endo-1d und exo-1d) bzw. [6-D]-endo-1d und [6-D]-exo-1d wird beschrieben. Die Diastereomeren werden nach Singulett-Anregung übereinstimmend zu einem Gemisch von 1,2,3,5-Tetramethyl-6-methylen-endo- und -exo-4-(trifluormethyl)bicyclo-[3.1.0]hex-2-en (endo- 7 und exo-7) bzw. [4-D]-endo-7 und [4-D]-exo-7 isomerisiert. Ein Mechanismus für diesen - vom Verhalten der alkylsubstituierten Homofulvene stark abweichenden - Reaktionsverlauf wird vorgeschlagen.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19851180711
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  • 2
    Electronic Resource
    Electronic Resource
    Synthesen 2,4-Dinitro-substituierter Bis(phenyl)platin(II)-Verbindungen (1986)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 119 (1986), S. 1845-1856 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Syntheses of 2,4-Dinitro-substituted Bis(phenyl)platinum(II) CompoundsSyntheses of the compounds {Pt(1,2,5,6-η4-COD)[2,4-(O2N)2C6H3](aryl)} [aryl = 4-CH3OC6H4; 4-CH3C6H4; 4-F3CC6H4; 4-O2NC6H4; 2,4-(O2N)2C6H3; COD = 1,5-cyclooctadiene] (7b-e, 4) and cis-{Pt[P(C6H5)3]2[2,4-(O2N)2C6H3](aryl)} [aryl = 4-F3CC6H4; 4-O2NC6H4, 2,4-(O2N)2C6H3] (cis-1d-f) are reported. Experiments to synthesize {Pt(1,2,5,6-η4-COD)[2,4-(O2N)2C6H3][4-(CH3)2NC6H4]} (7a) and cis-{Pt[P(C6H5)3]2[2,4-(O2N)2C6H3](XC6H4)} (X = 4-CH3O; 4-CH3) (cis-1b, c) with one electron acceptor-substituted and one electron donor-substituted phenyl ring resulted in the spontaneous reductive elimination of the biphenyls 2,4-(O2N)2C6H3-C6H4X-(4) [X = (CH3)2N; CH3O; CH3] (8a-c). This observation supports the hypothesis of a donor acceptor interaction in the transition state of the reductive biphenyl elimination from cis-1.
    Notes: Die Synthesen der Verbindungen {Pt(1,2,5,6-η4-COD)[2,4-(O2N)2C6H3](Aryl)} [Aryl = 4-CH3OC6H4; 4-CH3C6H4; 4-F3CC6H4; 4-O2NC6H4; 2,4-(O2N)2C6H3; COD = 1,5-Cyclooctadien] (7b-e, 4) und cis-{Pt[P(C6H5)3]2[2,4-(O2N)2C6H3](Aryl)} [Aryl = 4-F3CC6H4; 4-O2NC6H4, 2,4-(O2N)2C6H3] (cis-1d-f) werden beschrieben. Bei Versuchen zur Synthese von {Pt(1,2,5,6-η4-COD)[2,4-(O2N)2C6H3][4-(CH3)2NC6H4]} (7a) und cis-{Pt[P(C6H5)3]2[2,4-(O2N)2C6H3](XC6H4)} (X = 4-CH3O; 4-CH3) (cis-1b, c) mit jeweils einem Akzeptor- und einem Donator-substituierten Phenyl-Ring am Platin wurden spontan die Biphenyle 2,4-(O2N)2C6H3-C6H4X-(4) [X = (CH3)2N; CH3O; CH3] (8a-c) reduktiv eliminiert. Diese Beobachtung stützt die Hypothese über eine Donator-Akzeptor-Wechselwirkung im Übergangszustand der reduktiven Biphenyl-Eliminierung aus cis-1.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19861190607
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  • 3
    Electronic Resource
    Electronic Resource
    Synthesen und thermisches Verhalten von cis-Bis(4-tert-butyl-phenyl)platin(II)- und cis-(4-tert-Butylphenyl)(phenyl)platin(II)-Verbindungen mit Substituenten unterschiedlichen Charakters in den Phenylringen (1985)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 118 (1985), S. 2011-2019 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Syntheses and Properties of cis-Bis(4-tert-butylphenyl)platinum(II)- and cis-(4-tert-Butylphenyl)-(phenyl)platinum(II) Compounds with Substituents of Different Electronic Character in the Phenyl Rings15 cis-bis(4-tert-butylphenyl)platinum(II) compounds and cis-(4-tert-Butylphenyl)(phenyl)platinum(II) compounds with substituents of increasing acceptor character have been synthesized and studied with respect to their thermal behaviour.
    Notes: 15 cis-Bis(4-tert-butylphenyl)platin(II)-Verbindungen und cis-(4-tert-Butylphenyl)(phenyl)platin(II)-Verbindungen mit Substituenten ansteigenden Akzeptor-Charakters wurden synthetisiert und massenspektrometrisch im Hinblick auf ihr thermisches Verhalten studiert.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19851180524
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  • 4
    Electronic Resource
    Electronic Resource
    Synthese zweikerniger Platin-Verbindungen mit 1,4-Phenylen-Brücke (1986)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 119 (1986), S. 759-761 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Syntheses of Dinuclear Platinum Compounds Containing a 1,4-Phenylene BridgeSyntheses of 1,4-phenylene bridged dinuclear platinum-organic compounds dichlorobis-(1,2,5,6-η4-1,5-cyclooctadiene)(μ-1,4-phenylene)diplatinum(II) (1), all-trans-dichloro(μ-1,4-phenylene)tetrakis(tributylphosphane)diplatinum(II) (3), and all-trans-diphenyl(μ-1,4-phenylene)tetrakis(tributylphosphane)diplatinum(II) (2) are reported.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19861190235
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  • 5
    Electronic Resource
    Electronic Resource
    Über die Konfigurations- und Substituenten-Abhängigkeit der Pt — Cl-Valenzschwingungsfrequenzen und der 31P-NMR-Parameter in substituierten cis- und trans-Dichlorobis-(triphenylphosphan)platin(II)-Verbindungen (1986)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 119 (1986), S. 1694-1703 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: On the Configurational and Substituent Dependence of the Pt—Cl Stretching Frequencies and of the 31P NMR Parameters in Substituted cis- and trans- Dichlorobis(triphenylphosphane)platinum(II) CompoundsCorrelations between substituent constants σ, Pt — Cl vibrational frequencies and 31P NMR parameters 1J[195Pt,31P] und δ[31P] for compounds of the type cis- and trans-{Pt-[P(aryl)(aryl′)(aryl″)]2 Cl2} (aryl, aryl′, aryl″ = substituted phenyl rings) are reported and discussed with respect to bonding properties.
    Notes: Zusammenhänge zwischen Substituenten-Konstanten σ, Pt—Cl-Valenzschwingungsfrequenzen und 31P-NMR-Parameter 1J[195Pt, 31P] und δ[31P] für die Verbindungen des Typs cis- und trans-{Pt[P(aryl)(aryl′)(aryl″)]2 Cl2} (aryl, aryl′, aryl″ = substituierte Phenyl-Ringe) werden beschrieben und im Hinblick auf die Bindungseigenschaften diskutiert.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19861190521
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  • 6
    Electronic Resource
    Electronic Resource
    Untersuchungen am 6-Deuterio-1,2,3,5-tetramethyl-4-methylen-endo- und -exo-6-(trideuteriomethyl)bicyclo-[3.1.0]hex-2-en über den Mechanismus der Singulett-angeregten Photo-Isomerisierung des Homofulven-Systems (1985)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 118 (1985), S. 3551-3559 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: An Investigation of 6-Deuterio-1,2,3,5-tetramethyl-4-methylene-endo- and -exo-6-(trideuteriomethyl)bicyclo[3.1.0]hex-2-ene on the Mechanism of the Singlet Excited Photo-Isomerization of the Homofulvene SystemSyntheses of 6-deuterio-1,2,3,5-tetramethyl-4-methylene-endo- and -exo-6-(trideuteriomethyl)bicyclo[3.1.0]hex-2-ene ([endo-6-CD3, 6-D]-1 and [exo-6-CD3, 6-D]-1) are reported. Following excitation to the S1-state both compounds isomerize to 6-deuterio-1,2,3,4-tetramethyl-5-methylene-6-(trideuteriomethyl)-1,3-cyclohexadiene ([6-CD3, 6-D]-2). The positions of the labelled atoms in 2 are discussed with respect to the mechanism of the photoisomerization 1 → 2.
    Notes: Die Synthesen von 6-Deuterio-1,2,3,5-tetramethyl-4-methylen-endo- und -exo-6-(trideuteriomethyl)bicyclo[3.1.0]hex-2-en ([endo-6-CD3, 6-D]-1 und [exo-6-CD3, 6-D]-1) werden beschrieben. Beide Verbindungen werden nach Anregung in den S1-Zustand zum 6-Deuterio-1,2,3,4-tetramethyl-5-methylen-6-(trideuteriomethyl)-1,3-cyclohexadien ([6-CD3, 6-D]-2) isomerisiert. Aus den Positionen der markierten Atome im Produkt 2 werden Folgerungen über den Mechanismus der Photo-Isomerisierung 1 → 2 abgeleitet.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19851180911
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  • 7
    Electronic Resource
    Electronic Resource
    Synthesen von cis- und trans-Bis(X-phenyl)- bis(tributylphosphan)platin(II)-Verbindungen mit Substituenten von π-Akzeptor-Charakter in den platingebundenen Phenyl-Ringen (1985)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 118 (1985), S. 4347-4355 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Syntheses of cis- and trans-Bis(X-phenyl)bis(tributylphosphane)platinum(II) Compounds with Substituents of π-Acceptor Character in the Platinum-Bound Phenyl RingsA new synthetic route to the title compounds via cis-bis(4-bromophenyl)bis(tributylphos-phane)platinum(II) (cis-2a) and cis-bis(4-lithiophenyl)bis(tributylphosphane)platinum(II) (cis-3) is described. By this method the compounds cis-{Pt[P(nBu)3]2[C6H4X-(4)]2} (X = D, Si(CH3)3, CO2H, CO2CH3, CN, COC6H5) (cis-2b-g) and trans-{Pt[P(nBu)3]2[C6H4I-(4)]2} (trans-2h) have been synthesized; cis-2a-c, e-g have been transformed into their trans- isomers trans-2a-c, e-g by catalysis with tetrabutylammonium iodide.
    Notes: Ein neues Verfahren zur Synthese der Titel-Verbindungen über cis-Bis(4-bromphenyl)-bis(tributylphosphan)platin(II) (cis-2a) und cis-Bis(4-lithiophenyl)bis(tributylphosphan)-platin(II) (cis-3) wird beschrieben. Mit dieser Methode wurden die Verbindungen cis-{Pt[P(n-Bu)3]2[C6H4X- (4)]2} (X = D, Si(CH3)3, CO2H, CO2CH3, CN, COC6H5) (cis-2b-g) und trans-{Pt[P(n-Bu)3]2[C6H4I- (4)]2} (trans-2h) synthetisiert; aus cis-2a-c, e-g wurden unter Katalyse mit Tetrabutylammoniumiodid die zugehörigen trans-Isomeren trans-2a-c, e-g erhalten.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19851181107
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  • 8
    Electronic Resource
    Electronic Resource
    Eine Untersuchung an 6-Deuterio-endo- und-exo-6-isopropyl-1,2,3,5-tetramethyl-4-methylenbicyclo[3.1.0]hex-2-en über den Mechanismus der Singulett-angeregten Photo-Isomerisierung des Homofulven-Systems (1985)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 118 (1985), S. 2671-2680 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: An Investigation of 6-Deuterio-endo-and-exo-6-isopropyl-1,2,3,5-tetramethyl-4-methylenebicyclo[3.1.0]hex-2-ene on the Mechanism of the Singlet Excited Photo-Isomerization of the Homofulvene SystemSynthese of the diastereomeric homofulvenes 6-deuterio-endo- and -exo-6-isopropyl-1,2,3,5-tetramethyl-4-methylenebicyclo[3.1.0]hex-2-ene ([6-D]-endo-1 b and [6-D]-exo-1 b) are reported. Following excitation to the S1-state both compounds isomerize to 6-deuterio-6-isopropyl-1,2,3,5-tetramethyl-5-methylene-1,3-cyclohexadiene. A mechanism for the reaction sequence is suggested.
    Notes: Die Synthesen der diastereomeren Homofulvene 6-Deuterio-endo- und -exo-6-isopropyl-1,2,3,5- tetramethyl-4-methylenbicyclo[3.1.0]hex-2-en ([6-D]-endo-1b und [6-D]-exo-1b) werden beschrieben. Beide Verbindungen isomerisieren nach Anregung in den S1-Zustand zu 6-Deuterio-6-isopropyl-1,2,3,4-tetramethyl-5-methylen-1,3-cyclohexadien ([6-D]-2b). Ein Mechanismus für den Verlauf dieser Photo-Isomerisierung wird vorgeschlagen.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19851180710
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  • 9
    Electronic Resource
    Electronic Resource
    Synthesen substituierter cis- und trans-Bis(phenyl)bis(tri-n-butylphosphan)platin(II)-Verbindungen (1985)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 118 (1985), S. 4653-4664 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Syntheses of Substituted cis- and trans-Bis(phenyl)bis(tri-n-butylphosphane)platinum(II) CompoundsSyntheses of the compounds cis- and trans-{Pt[P(n-C4H9)3]2 (X-C6H4)2} (X = H, 4-CH3O, 4-(CH3)3C, 4-CF3, 4-Br, 4-Cl, 4-(CH3)3Si, 4-C6H5, 4-D, 2-D) (cis- and trans-3a-j), cis- and trans-{Pt[P(n-C4H9)3]2 (C6X5)2} (X = D, F) (cis- and trans-3k, I), trans-{Pt[P(n-C4H9)3]2 (X-C6H4)Cl} (X = H, 4-CH3O, 4-(CH3)3C, 4-CF3) (trans-4a-d) and trans-{Pt[P(n-C4H9)3]2 (4-X-C6H4)-(4-Y-C6H4)} (X/Y = Br/(CH3)3C, Br/CH3O, Br/CF3, Cl/CF3, CH3O/CF3, (CH3)3C/CN, CH3O/CN, CF3/CN) (trans-5a-h) are described.
    Notes: Synthesen der Verbindungen cis- und trans-{Pt[P(n-C4H9)3]2 (X-C6H4)2} (X = H, 4-CH3O, 4-(CH3)3C, 4-CF3, 4-Br, 4-Cl, 4-(CH3)3Si, 4-C6H5, 4-D, 2-D) (cis- und trans-3a-J), cis- und trans-{Pt[P(n-C4H9)3]2 (C6X5)2) (X = D, F) (cis- und trans-3k, I), trans-{Pt[P(n-C4H9)3]2 (X-C6H4)Cl} (X = H, 4-CH3O, 4-(CH3)3C, 4-CF3) (trans-4a-d)-sowie trans-{Pt[P(n-C4H9)3]2 (4-X-C6H4)-(4-Y-C6H4)} (X/Y = Br/(CH3)3C, Br/CH3O, Br/CF3, Cl/CF3, CH3O/CF3, (CH3)3C/CN, CH3O/CN, CF3/CN) (trans-5a-h) werden beschrieben.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19851181202
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