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  • 1
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Kationische Carbonyl-Ruthenium(II)-Komplexe mit Nitril-LigandenStabile kationische Komplexe vom Typ [RuCO(PPh3)2(L)RCN]+[ClO4]-, mit Acetonitril bzw. Acrylonitril wurden dargestellt. Als zweizähnige Liganden (LH) dienten Acetylaceton, Benzoylaceton, Dibenzoylmethan, Trifluorothenoylaceton und 8-Hydroxochinolin. Die Komplexe wurden analysiert, ferner durch IR-, 1H- und 31P-NMR-, Leitfähigkeits- und ESCA-Messungen charakterisiert; eine Stereochemie erscheint möglich.
    Notes: Stable cationic complexes of the type [RuCO(PPh3)2(L)(RCN)]+[ClO4]- derived from acetonitrile and acrylonitrile have been synthesized. The bidentate ligands (LH) used are acetylacetone, benzoylacetone, dibenzoylmethane, trifluorothenoyl acetone and 8-hydroxyquinoline. The complexes have been characterized by elemental analysis, IR, conductivity, 1H and 31P NMR and ESCA studies, and possible stereochemistry has been established.
    Additional Material: 2 Ill.
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 465 (1980), S. 204-208 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Neue Chelate des Bis-β- Carbomethoxyethlzinn(IV)Zwei- und dreizähnige Chelatinganden (s. Abstract) Können die Chloratome des Bis-β-carbomethoxethyldichlozinn(IV) unter Bildung neuer stabiler Chelatverbindungen ersetzen. Bromierung dieser Verbindungen unter milden Bedingungen zeigt, daß die Chelatinganden bevorzugt abgespalten werden. Die neun Verbindungen werden durch Elementaranalyse, IR- und PMR-Spektren sowie Molekulargewichtsbestimmungen Charakterisiert und mögliche Strukturen werden Vorgeschlagen.
    Notes: Bi- and tri-denate Chelating ligands (acetylacetone, salicylasehyde, 8-hydroxy quinoline, dibenzoylmethane, benzoyl phenhydroxlmanine, 2-hydroxy benzophenone, 2-hydroxy 4-methoxy benzophenone and salichyaldine) replace cholrine atoms of bis-β-carbomethoxyethyl dischlorotin (IV) to form new stable Cheleted compounds. Bromination studies under mild conditions indicate that in these compounds the Cheleated ligand part is preferentially cleaved. The new compounds are characterized by elemental analysis. IR and PMR spectra and molecular weight, and possible structures have been assigned.
    Additional Material: 1 Tab.
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  • 3
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Schiffsche Basen-Komplexe des Rhodium(I) mit dreizähnigen N-Methyl-S-methyldithiocarbazat-LigandenSchiffsche Basen aus der Kondensation von β-Diketonen mit N-Methyl-S-methyl-dithiocarbazaten ergeben bei Reaktion mit [Rh(μ-Cl)(CO)2]2 cis-Dicarbonyl-Komplexe Rh(CO)2(Schiff). Die aus aromatischen Aldehyden erhaltenen bilden trans-Dicarbonyl-Komplexe. Mit einem Überschuß von Triphenylphosphin ergeben diese Komplexe nur Rh(CO)(PPh3)(Schiff). Cis-1,5-cyclooctadien (COD) reagiert mit cis-Dicarbonyl-Komplexen zu carbonylfreien Produkten Rh(COD)(Schiff); gleiche Reaktionen wurden bei trans-Dicarbonyl-Komplexen beobachtet. Oxydative Addition von Brom an diese Komplexe ergibt Dibromderivate, in denen die Schiffsche Base als zweizähniger Ligand wirkt, Rh(PPH3)2(Schiff)-Komplexe wurden durch Reaktion oben genannter Schiffscher Basen mit Rh(PPh3)3Cl erhalten. Die Strukturen dieser neuen Komplexe wurden auf Grund von IR-und 1H-NMR-Spektren bestimmt.
    Notes: Schiff bases derived from the condensation of β-diketones with N-methyl-S-methyldithiocarbazates yield cis dicarbonyl complexes Rh(CO)2 (Schiff) on reaction with [Rh(μ-Cl)(CO)2]2. Those derived from aromatic aldehydes form trans dicarbonyl complexes. These complexes with excess of triphenylphosphine give only Rh(CO)(PPh3)(Schiff). cis-1,5-cyclooctadiene (COD) reacts with cis dicarbonyl complexes to yield the carbonyl-free product Rh(COD)(Schiff); similar reactions have not been observed in the case of trans-dicarbonyl complexes. Oxidative addition of bromine to these complexes yields dibromo derivative in which the Schiff base acts as bidentate chelate. Rh(PPh3)2(Schiff) complexes have been obtained from the reaction of above Schiff bases with Rh(PPh3)3Cl. The structures of these new complexes have been determined based on IR and 1H NMR spectra.
    Additional Material: 2 Ill.
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  • 4
    ISSN: 0268-2605
    Keywords: Estertin complexes ; S-benzyldithio-carbazate ; Schiff bases ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The Schiff bases [H2SBSaD], [H2SBVD] and [H2SBND], derived by the condensation of S-benzyldithiocarbazate and salicylaldehyde, 2-hydroxy-3-methoxybenzaldehyde and 2-hydroxy-1-naphthaldehyde respectively, react with diestertin dichlorides, R2SnCl2 [R=—CH2CH2CO2CH3, —CH2CH2CO2C2H5 or —CH2CH2CO2C4H9] in 1:1 molar proportion to yield chlorine-substituted complexes of the type R2Sn(Schiff base), the base being tridentate. The complexes are characterized on the basis of their elemental analyses, IR and 1H NMR spectral studies. The 13C and 119Sn NMR and the tin-carbon coupling constant data reveal the structures of the complexes to be octahedral with trans ester grouping, and bidentate ester linkages. The pentacoordinated complex (CH3)2Sn(SBSaD) was prepared by the reaction of dimethyltin oxide with H2SBSaD in equimolar proportions.
    Additional Material: 2 Ill.
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  • 5
    ISSN: 0268-2605
    Keywords: Organotin Schiff base complexes ; spectroscopic studies ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Organotin(IV) Schiff base complexes of the type (L)SnR2 [where R=CH3, C6H5 or CH2CH2CO2 CH3], (LH)Sn(C6H5)3 and (L)SnCl(CH2CH2CO2 CH3) [where LH2=2-N-salicylideneimino-2-methyl-1-propanol, derived from the condensation of salicylaldehyde and 2-amino-2-methyl-1-propanol] have been prepared and characterized on the basis of their elemental analyses, IR, 1H, 13C and 119Sn NMR studies. In these mononuclear complexes the Schiff base acts either as a dianionic tridentate or as a monobasic bidentate moiety by coordinating through an alkoxy group, an azomethine nitrogen and a phenoxide ion to tin. Sulphur dioxide inserts in the tin-methyl/-phenyl bond in the above Schiff base complexes to give tin-O-sulphinates of formulae (L)RSn(SO2R) and (LH)(C6H5)2Sn(SO2C6H5).
    Additional Material: 2 Ill.
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  • 6
    ISSN: 1572-901X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Hexacoordinated ruthenium(II) alkenyl complexes of the type Ru(CO)(CR=CHPh)( $${\text{N}}{\text{S}}$$ )(PPh3)2 have been prepared from coordinately unsaturated σ-vinyl complexes [Ru(CO)Cl(CR=CHPh)(PPh3)2] (R = H or Ph) and the sodio-derivative of the $${\text{N}}{\text{S}}$$ containing heterocyclic ligands [ $${\text{N}}{\text{S}}$$ = 3,4-substituted 1,2,4-triazole-5-thione and 5-alkylthio-1,3,4-thiadiazole-2-thione] in a CH2Cl2/MeOH mixture at ambient temperature. The complexes were characterized by their elemental analysis, i.r., 1H and 31P n.m.r. spectra. An octahedral structure with transphosphorus ligands has been assigned on the basis of the spectral data.
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  • 7
    ISSN: 1572-901X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Schiff bases (HL) produced by the condensation ofN-methyl-S-methyldithiocarbazate with β-diketones and aromatic aldehydes or ketones react with [RuHClCO(PPh3)3] to yield hexacoordinated complexes of the type [RuClCO(PPh3)2(L)]. These Schiff bases react with [RuCl2{P(OR)3}4] in 1∶1 molar ratio to yield [RuCl{P(OR)3}2(L)] in which L is a tridentate. The chlorine atom in the complex can be removed in coordinating solvents in the presence of anions such as [BPh4]− to give cationic complexes. Bis chelate complexes, [Ru{P(OR)3}2(L)2] are prepared from 1∶2 molar proportions of the reactants. These complexes were characterised by elemental analyses, i.r.,1H n.m.r., u.v. and conductivity studies.
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  • 8
    ISSN: 1572-901X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary Phenylacetylene reacts stoichiometrically or in excess with the Ru—H bond of RuH(CO)(PPh3)2(L) (LH = 2-hydroxypyridine, 2-hydroxy-6-methylpyridine, acetylacetone, benzoylacetone, 2-hydroxyacetophenone, 2-hydroxypropiophenone, 2-hydroxybenzophenone and 4-methoxy-2-hydroxybenzophenone) in boiling benzene to give σ-vinylic or σ-vinylalkynyl complexes of the type Ru(CO)-(PPh3)2(L)(CH $$ = $$ CHPh) and Ru(CO)(PPh3)2(L){C-(C $$ \equiv $$ CPh) $$ = $$ CHPh} in good yield. The vinylic complex can also be obtained by reacting the sodio derivative of the chelating ligand with the 16e− unsaturated complex, [Ru(CO)Cl(CH $$ = $$ CHPh)(PPh3)2], in CH2Cl2/MeOH mixture at ambient temperature. These complexes have been characterized by elemental analyses, and i.r., 1H, 13C and 31P n.m.r. spectroscopy.
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  • 9
    ISSN: 0022-328X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
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  • 10
    ISSN: 0022-328X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
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