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  • Chemistry  (119)
  • Polymer and Materials Science  (14)
  • ASTROPHYSICS  (13)
  • Life and Medical Sciences  (5)
  • Elektrochemie
  • 1980-1984  (87)
  • 1975-1979  (48)
  • 1940-1944  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Die Kristallstruktur von BaHg(CN)4 · 4 PyridinProfessor Walter Rüdorff zum 75. Geburtstage am 3. Oktober 1984 gewidmet (1984)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 516 (1984), S. 30-34 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Crystal Structure of BaHg(CN)4 · 4 PyridineThe structure of the tetragonal BaHg(CN)4 · 4 Pyridine (space group I4, a = 1119.4(7), c = 1 057.9(7) pm, Z = 2, dc = 1.87 g · cm-3) contains tetrahedral Hg(CN)4 and bisdisphenoide Ba(NC)4(py)4 groups, which are linked together by Hg—CN—Ba bridges. The BaHg(CN)4 framework consists of a 3-dimensional network of all round edge-sharing tetrahedrons. The analogous strontium compound is isotype with a = 1 108.2(9) and c = 1 035.3(14) pm.
    Notes: In der Struktur des tetragonalen BaHg(CN)4 · 4 Pyridin (Raumgruppe I4, a = 1119,4(7), c = 1 057,9(9) pm, Z = 2, dc = 1,87 g · cm-3) sind tetraedrische Hg(CN)4- und bisdisphenoide Ba(NC)4(py)4-Gruppen über Hg—CN—Ba-Brücken zu einem Raumnetz verknüpft. Dem BaHg(CN)4-Gerüst liegt ein Aufbau aus allseitig eckenverknüpften Tetraedern zugrunde. Die analoge Strontium-Verbindung ist isotyp mit a = 1 108,2(9) und c = 1 035,3(14) pm.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19845160905
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  • 2
    Electronic Resource
    Electronic Resource
    Reaktionen an der α-Methylengruppe von (Glycinato)platin(II)-Chelat-Komplexen (1976)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 109 (1976), S. 965-969 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions of the α-Methylene Group in (Glycinato)platinum(II) Chelate ComplexesThe reaction of the glycinato complex (n-Bu3P)Pt(Cl)NH2CH2CO2) (1)with aldehydes or alkylating agents (dimethyl sulfate, benzyl chloride) affords the chelate compounds 3-6 with substituted α-amino acids.
    Notes: Der Glycinato-Komplex (n-Bu3P)Pt(Cl)NH2CH2CO2) (1) setzt sich mit Aldehyden oder Alkylierungsmitteln (Dimethylsulfat, Benzylchlorid) zu entsprechenden Chelat-Verbindungen 3-6 mit Höheren α-Aminosäuren um.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19761090317
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  • 3
    Electronic Resource
    Electronic Resource
    Neue Übergangsmetallkomplexe mit Nuclein-Basen und Nucleosiden (1976)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 109 (1976), S. 970-993 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: New Transition Metal Complexes with Nucleic Acid bases and NucleosidesThe isolation of carbonylmetal complexes W(CO)5L (1), [W(CO)5L]- (2), [Mo(CO)3enL]- (3), (π-CH3C5H4)Mn(CO)2L (4), Rh(CO)2(CI)L (5), (H)(CO)(PPh3)2L2 (6), M(CO)(PPh3)2L (M = Rh, Ir) (7,8) and of phosphine and amine containing monomeric and polynuclear palladium(II) and platinum(II) complexes (9-14 with various neutral and anionic nucleic acid bases and nucleosides L is reported. Using i. r. and 1H n. m. r. data a tentative assignment of the coordination sites of the ambidentate ligands is given. The reaction of 1,3,7,9-tetramethylxanthinium perchlorate with Hg11 acetate affords the C-8 mercurated complex 15.
    Notes: Die Darstellung von Carbonylmetallkomplexen W(CO)5L (1), [W(CO)5L]- (2), [Mo(CO)3enL] (3)-, (π-CH3C5H4)Mn(CO)2L (4), Rh(CO)2(Cl)L (5), Ir(H)(CO)(PPh3)2L2 (6), M(CO)(PPh3)2L (M = Rh, Ir) (7,8) und von phosphin- und amin-haltigen monomeren sowie mehrkernigen Palladium(II)-und Platin(II)-und Platin (II)-Komplexen (9-14) mit einer Reihe von neutralen und anionischen Purin und Pyrimidin-Basen und Nucleosiden L wird beschrieben. Mit Hilfe von IR- und 1H-NMR- Daten wird versucht, die Koordinationsstellen der ambidenten Nucleinbasen zu bestimmen. 1,3,7,9-Tetramethylxanthinium-perchlorat wird mit Quecksilber (II)-acetat am C-8 metalliert (15).
    Additional Material: 6 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19761090318
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  • 4
    Electronic Resource
    Electronic Resource
    Mono- und Bis(phenyltelluro)methyllithium (1975)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 108 (1975), S. 314-321 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Mono- and Bis(pheyltelluro)methyllithiumSolutions of the title compounds are readily prepared from bis(phenyltelluro)methane (7): the monosubstituted one by transmetallative C6H5Te/Li-exchange with alkyllithium, the disubstituted one by direct metalation with lithium diisopropylamide. This was proved in both cases by deuterolysis and derivatization with electrophiles. The new tellurium derivatives are compared with the sulfur and selenium analogues.
    Notes: Lösungen der Titelverbindungen lassen sich aus Bis(phenyltelluro)methan (7) leicht darstellen, das monosubstituierte Li-Derivat durch C6H5Te/Li-Austausch mit Alkyllithium, das disubstituierte durch direkte Metallierung mit Lithium-diisopropylamid. In beiden Fällen wurde dies durch Deuterolyse und Umsetzung mit Elektrophilen bewiesen. Die neuen Tellurderivate werden mit den Schwefel- und Selen-Isologen verglichen.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19751080139
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  • 5
    Electronic Resource
    Electronic Resource
    Übergangsmetall-Carbin-Komplexe, XV. Phenylcarbin sowie Methoxyphenyl-, (Dimethylamino)phenyl-und Aminophenylcarben als Liganden in kationischen oder neutralen Komplexen des Typs π-ArCr(CO)2L (1976)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 109 (1976), S. 3089-3098 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Transition Metal Carbyne Complexes, XVPhenylcarbyne as well as Methoxyphenyl-, (Dimethylamino)phenyl-, and Aminophenylcarbene as Ligands in Cationic or Neutral Complexes of the Type π-ArCr(CO)2LComplexes of the type π-ArCr(CO)3 1a-d are converted into the carbene complexes π-ArCr(CO)2-[C(C6H5)OCH3] 2a-d by treatment with phenyllithium followed by alkylation. On treatment with boron trichloride 2a-d yield the cationic carbyne complexes of the general formula {π-ArCr(CO)2[C(C6H5]}⊕[BCl4]⊖ 3a, c, d Aminolysis with ammonia or dimethylamine leads to the aminocarbene complexes π-ArCr(CO)2[C6H5)NR2] 4 and 5 which are not obtainable by direct aminolysis of 2a-d. These diamagnetic complexes, some of which are very thermolabile, were characterized by i. r., H n. m. r., and 13C n. m. r. spectroscopy.
    Notes: Aus Tricarbonyl-Aromaten-chrom(0)-Komplexen π-ArCr(CO)3 1a-d lassen sich durch Umsetzung mit Phenyllithium und anschließende Alkylierung die Carbenkomplexe π-ArCr(CO)2-[C(C6H5)OCH3] 2a-d darstellen, deren Reaktion mit Bortrichlorid zu kationischen Carbinkomplexen der allgemeinen Formel {π-ArCr(CO)2[C(C6H5]}⊕[BCl4]⊖ 3a, c, d führt. Bei der Aminolyse der kationischen Komplexe mit Ammoniak oder Dimethylamin entstehen - durch Aminolyse von 2a-d nicht zugängliche - Aminocarbenkomplexe π-ArCr(CO)2[C6H5)NR2] 4 und 5. Die diamagnetischen, teilweise sehr thermolabilen Verbindungen werden durch IR-, 1 H-NMR-und 13C-NMR-Spektren charakterisiert.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19761090913
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  • 6
    Electronic Resource
    Electronic Resource
    Synthesis, Properties, and Crystal Structure of Silyl Nitronates (Silyl Esters of aci-Nitroalkanes): Towards the SN2 Reaction Path with Retention of Configuration at Silicon (1980)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 63 (1980), S. 697-710 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: An efficient and flexible method for the preparation of silyl nitronates is described (see 1-10). NMR. spectral investigations indicate a rapid 1,3-silyl migration process, with an activation energy of about 10 kcal mol-1. X-ray crystallographic studies on the silyl nitronates 3 and 8 show structures that lean towards an SN2 retention pathway at silicon.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19800630320
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  • 7
    Electronic Resource
    Electronic Resource
    Erhöhung der Nachweisempfindlichkeit von Cyclosporin A durch Derivatisierung mit 2-Naphthylselenylchlorid (1980)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 63 (1980), S. 728-732 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Enhancement of Detection Sensitivity of Cyclosporin A by Derivatization with 2-NapthylselenylchlorideThe UV./HPLC. detection sensitivity of cyclosporine A 1, an immunosuppressive cyclic undecapeptide containing one D-aminoacid and seven N-methylated aminoacids, is enhanced by a factor of 3-4 (limit of detection 5 ng) by conversion of the characteristic side chain of amino-acid-1 to the β-naphthylseleno-substituted tetrahydrofuran derivative 4.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19800630323
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  • 8
    Electronic Resource
    Electronic Resource
    Herstellung von 1, 3-Diketonen und von Nitro-diketonen durch (1:1)-Acylierungen von Lithiumenolaten mit Acylchloriden (1981)
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 64 (1981), S. 716-735 
    Details
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Preparation of 1,3-Diketones and of Nitro-diketones by (1:1)-Acylation of Lithium Enolates with Acyl ChloridesSlow addition of precooled solutions of lithium enolates in THF (Fig. 1) to solutions of equimolar amounts of acyl chlorides in the same solvent at temperatures between - 80 and - 100° furnishes 1, 3-diketones in acceptable to good yields (Tables 1-3). Even 3-nitropropionyl and 4-nitrobutyryl chloride can be employed for the (1:1)-acylation of enolates to give the synthetically useful 5- and 6-nitro-1, 3-diketones 13 and 25, respectively. The scope and the limitations of this method of preparing 1, 3-diketones are given and are compared with alternative methods.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/hlca.19810640313
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  • 9
    Electronic Resource
    Electronic Resource
    Antitumor-aktive cis-Platin(II)-Komplexe mit α-Aminosäureestern und Peptidestern. Struktur von cis-Dichlorobis(glycylglycin-ethylester)platin(II) (1982)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 115 (1982), S. 2256-2270 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Antitumor Active cis-Platinum(II) Complexes with α-Amino Acid Esters and Peptide Esters. X-Ray Structure of cis-Dichlorobis(glycylglycine ethyl ester)platinum(II)A series of cis-platinum(II) complexes X2PtL2 (1-4) (X = halide, 2X = oxalate, malonate; L = α-amino acid ester, peptide ester) has been obtained from Pt42- and L. The dipeptide ester complexes are also accessible via peptide synthesis at the complex from Cl2Pt(NH2CHRCO2H)2 and α-amino acid esters using carbodiimide as coupling agent and the platinum atom as amino protecting group. The complexes Cl2PtL2 with α-amino acid ester ligands have also been prepared from the bis(chelate) compounds cis-Pt(NH2CHRCO2)2 and alcohol in the presence of HCl. The complexes have been characterized by their spectroscopic data, cis-Cl2Pt(GlyGlyOEt)2 (2a) by an X-ray analysis.
    Notes: Eine Reihe von cis-Platin(II)-Komplexen X2PtL2(1-4) (X = Halogenid, 2X = Oxalat, Malonat; L = α-Aminosäureester, Peptidester) wird aus PtX42- und L erhalten. Entsprechende Komplexe mit Dipeptidester-Liganden sind auch durch Peptidsynthese am Komplex aus Cl2Pt-(NH2CHRCO2H)2 und α-Aminosäureestern mit Carbodiimid als Kupplungskomponente und Platin als Aminoschutzgruppe zugänglich. Die Verbindungen Cl2PtL2 mit α-Aminosäureester-Liganden lassen sich auch aus den Bis(chelat)-Komplexen cis-Pt(NH2CHRCO2)2 und Alkohol in Gegenwart von HCl gewinnen. Die cis-Struktur der Verbindungen wurde spektroskopisch, die von Cl2Pt(GlyGlyOEt)2 (2a) durch Röntgenstrukturanalyse nachgewiesen.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19821150621
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  • 10
    Electronic Resource
    Electronic Resource
    Platin(II)-Komplexe von vinylogen Aminoisocyaniden (1983)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 116 (1983), S. 3205-3211 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Platinum(II) Complexes of Vinylogous Amino IsocyanidesIsocyanide platinum(II) complexes trans-[(Ph3P)2LPtCl]+Cl- (2) (L = vinylogous aminoisonitrile are formed from cis-(Ph3P)2PtCl2 and L; the cations of 2 have been isolated as PF6- salts (3). At higher temperatures the salts 2 give the neutral complexes cis-(Ph3P)LPtCl2 (4) and PPh3. Treatment of 4 with amines HNR2R3 affords the diaminocarbene complexes cis-[(Ph3P)[(R1R3N)C]PtCl(amine)]+Cl- (isolated as PF6- salts 5) which on heating give the compounds cis-(Ph3P)[R1HN)(R2R3 N)C]PtCl2 (7).
    Notes: Isocyanid-Platin(II)-Komplexe trans-[Ph3P)2LPtCl]+Cl- (2) (L = vinyloges Aminoisonitril entstehen aus cis-Ph3P)2PtCl2 und L; sie werden als stabile PF6--Salze (3) isoliert. Die Verbindungen 2 spalten beim Erhitzen Ph3P ab unter Bildung der neutralen Komplexe cis-(Ph3P)LPtCl2 (4), die sich mit Aminen HNR2R3 zu den Diaminocarben-Komplexen cis-(Ph3P)[R1HN)(R2R3 N)C]PtCl(amine)+Cl2 (7) umsetzen, wobei als Zwischenstufen ionische Verbindungen [(Ph3P)[R1HN)(R2R3N)C]PtCl(amin)] +PF6- (5) gefaßt wurden.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19831160918
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