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  • 11
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 118 (1985), S. 3258-3267 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Metal Complexes with Biologically Important Ligands, XXXVIII. Complexes of Platinum(II), Palladium(II), Nickel(II), and Copper(II) with 1-Amino-1-cyclopropanecarboxylic Acid DerivativesMetal complexes with the anion of 1-amino-1-cyclopropanecarboxylic acid (2a - d), its ethyl ester (3a - c), with Schiff bases from this α-amino acid and amide acetal (4a - d), pyruvic acid (5a - d), and salicylaldehyde (6a - c, 7a,b), respectively, have been prepared. The compounds are characterized by their spectra. The X-ray structure analysis at -90°C of 3a shows nearly equal C - C bond lengths for the cyclopropane ring.
    Notes: Die Darstellung von Metallkomplexen mit dem Anion von 1-Amino-1-cyclopropancarbonsäure (2a - d), mit dessen Ethylester (3a - c), mit Schiff-Basen aus dieser α-Aminosäure und Amidacetal (4a - d), Brenztraubensäure (5a - d) und Salicylaldehyd (6a - c, 7a,b) wird beschrieben. Die Verbindungen werden spektroskopisch charakterisiert. Die bei -90°C durchgeführte Röntgenstrukturanalyse von 3a zeigt annähernd gleiche C - C-Abstände im Cyclopropanring.
    Additional Material: 1 Ill.
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  • 12
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 120 (1987), S. 895-900 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: (OC)5ReFBF3 reacts with ethyl thiocyanate, malononitrile, cyanamide, and dicyandiamide (L) to give the ionic complexes [(OC)5ReL]+BF-4 (1). Two or three Re(CO)-3 cations, respectively, can be added to tetracyanoethene and tetracyano-p-quinodimethane (TCNQ) to give 2, 3. With the anions of tricyanoethenolate, TCNQ-, tricyanomethanide and dicyanamide (L-) the neutral compounds (OC)5ReL (4-7) are formed. The IR spectra and the X-ray structure analyses of [(OC)5Re(NCNC(NH2)2]+BF -4 (1d), (OC)5ReNCC(CN)2 (6), and of (OC)5ReNCNCN (7) show that the ligands are coordinated in all cases via the nitrile N-atom to the metal.
    Notes: (OC)5ReFBF3 setzt mit Ethylthiocyanat, Malononitril, Cyanamid und Dicyandiamid (L) zu den ionogenen Verbindungen [(OC)5ReL]+BF-4 (1) um. An Tetracyanethen sowie an Tetracyan-p-chinodimethan lassen sich zwei bzw. drei Re(CO)-3-Kationen unter Bildung von 2 und 3 addieren. Mit den Anionen Tricyanethenolat, TCNQ-, Tricyanmethanid und Dicyanamid (L-) entstehen die Neutral-Komplexe (OC)5ReL (4-7). Die IR-Spektren sowie die Röntgenstrukturanalysen von [(OC)5Re(NCNC(NH2)2]+BF -4 (1d), (OC)5ReNCC(CN)2 (6) und (OC)5ReNCNCN (7) zeigen, daß die Liganden in allen Fällen über das Nitril-N-Atom an das Metall koordiniert sind.
    Additional Material: 3 Ill.
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  • 13
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 121 (1988), S. 1123-1131 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Enatioselective catalysis, 5.  -  New Ligands with four Stereogenic Centers. Synthesis and Separation of the Separation of the three Diastereomeric [P(R,S),3R,4R,P′(R,S]-3,4-Bis(methylphenylphosphino)-pyrrolidinesFrom (3R,4R)-3,4-bis(diphenylphosphino)pyrrolidine (1a) or the N-benzyl derivative 1b [P(R,S),3R,4R,P′-(R,S)]-3,4-bis(phenylphosphino)pyrrolidin (2a-*) resp. its N-benzyl derivative 2b-* were prepared as diastereomeric mixture. From 2a-* isomerically pure (PR,3R,4R,P′S)-3,4-bis(benzylphenyl-phosphino)pyrrolidin (3a-3) was prepared. [P(R,S), 3R,4R, P′(R,S)]-3,4-bis(methylphenylphosphino)pyrrolidin (4a-*), obtained from 2a-*, was a mixture of the three possible diastereomers. This mixture could be separated through the palladium complexes of the N-tert-butoxycarbonyl derivatives 8c-*. [(PS, 3R4R,P′S)-1-(tert-Butoxycarbonyl)-3,4-bis(methylphenylphosphino) pyrrolidin-P,P′]diiodopalladium(II) (8c-1) and for comparison [(3R,4R)-1-benzyl-3,4-bis(diphenylphosphino) pyrrolidine-P,P′](1,5-cyclooctadiene)rhodium(I) tetrafluoroborate (11) were characterised by X-ray crystallography.
    Notes: Ausgehend von (3R,4R)-3,4-Bis(diphenylphosphino)pyrrolidin (1a), bzw. dem N-Benzyl-Derivat 1b wurden [P(R,S),3R,4R,P′-(R,S)]-3,4-Bis(phenylphosphino)pyrrolidin (2a-*) und dessen N-Benzyl-Derivat 2b-* als Diastereomerengemische hergestellt. Aus 2a-* wurde isomerenreines (PR,3R,4R,P′S)-3,4-Bis(benzylphenyl-phosphino)pyrrolidin (3a-3) dargestellt. [P(R,S), 3R,4R, P′(R,S)]-3,4-Bis(methylphenylphosphino)pyrrolidin (4a-*) wurde aus 2a-* als Diastereomerengemisch erhalten, dessen Auftrennung über die Palladiumkomplexe der N-tert-Butoxycarbonyl-Derivate 8c-* gelang. [(PS, 3R4R,P′S)-1-(tert-Butoxycarbonyl)-3,4-bis(methylphenylphosphino) pyrrolidin-P,P′]diiodopalladium(II) (8c-1) und zum Vergleich [(3R,4R)-1-Benzyl-3,4-bis(diphenylphosphino)pyrrolidin-P,P′] (1,5-cyclooctadien)rhodium(I)-tetrafluoroborat (11) wurden durch Röntgenstrukturanalyse charakterisiert.
    Additional Material: 3 Ill.
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  • 14
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 121 (1988), S. 1759-1765 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Metal Complexes with Biologically Important Ligands, XLVII1). Copper, Nickel, Palladium, and Platinum(II) Complexes of C-Allylglycine and N-(Diphenylmethylene)-C-allylglycine EsterC-Allylglycine reacts with Ni, Cu, Pd, and Pt(II) salts - dependent on pH - to give trans-N,O-bischelate complexes M[NH2CH(CH2CH=CH2CO2]2 (M = Cu, Ni, Pd) 1 or N,η2-C,C-chelate complexes Cl2MNH2CH(CO)2R)CH2CR=CH2 (R = H, Me; M = Pd, Pt). The reactions of N-(diphenylmethylene)-C-allylglycine ester with Na2PdCl4 and PtCl2 yield ortho-metallated complexes 3, in which the ligand is bound to the ortho-C(phenyl) atom, the imino-B atom, and the olefinic double bond. 2a and 3c were characterized by X-ray structure analyses.
    Notes: C-Allylglycin reagiert - abhängig vom pH-Wert - mit Ni-, Cu-, Pd- und Pt(II)-Salzen zu den trans-N,O-Bischelat-Komplexen M[NH2CH(CH2CH=CH2CO2]2 1 (M = Cu, Ni, Pd) oder zu N,η2-C,C-Chelat-Komplexen Cl2MNH2CH(CO)2R)CH2C-(R)=CH2 2 (R = H, Me; M = Pd, Pt). N-(Diphenylmethylen)-C-allylglycinester setzen sich mit Na2PdCl4 oder PtCl2 zu den ortho-metallierten Komplexen 3 um, in denen der Ligand dreizähnig über das ortho-C(Phenyl)-Atom, das Iminostickstoff-Atom und die C = C-Doppelbindung koordiniert ist. Die Molekülstrukturen von 2a und 3c wurden röntgenographisch bestimmt.
    Additional Material: 2 Ill.
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  • 15
    ISSN: 0009-2940
    Keywords: Isocyanide complexes / γ-Oxoisocyanide complexes / Cyano complexes of iron (II), ruthenium(II), palladium(II), platinum(II) ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Pseudohalogeno Metal Compounds, LXXIII. - γ-Oxoisocyanide Complexes of Iron(II), Ruthenium(II), Palladium(II), and Platinum(I1) from Cyano Complexes and α,β-Unsaturated Carbonyl Compounds in the Presence of Et2O - HBF+ Crystal Structure of cis-(phen)2Fe[CNC(CH3)2CH2C(O)CH=C(CH3)2]2+2(BF-4)2Reactions of trans-(R3P)2M(CN)2 (M = Pd, Pt), cis-[(phen)2-Fe(CN)2], Cp(dppe)Fe(CN), and Cp(Ph3P)2Ru(CN) with several α,β-unsaturated ketones in the presence of Et2O-HBF4 yield complexes containing the γ-oxoisocyanide ligand: trans [R3P)2M(CN-CR1R2-C(O)R4)2]2+(BF4-)2 (5-8), trans -[(R3P)2Pt(CN)(CN-CR1R2-CHR3-C(O)R4)]+ BF4- (9), cis [(phen2)]Fe(CN-CR1R2-CHR3-C(O)R4)2]2+(BF4-)2 (10), and [CpL2M(CN-CR1R2-CHR3-C(O)R4)]*BF4- (11, 12) (M = Fe, Ru; L = PPh3, 1/2 dppe). The compounds were characterized by their spectroscopic data, 10g by X-ray crystallography. The carbonyl function of the coordinated ligands could be reduced by NaBH4/CeCl3·6H2O in some cases to give complexes of γ-hydroxyisocyanide and oxazine-2-ylidene ligands.
    Additional Material: 1 Ill.
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  • 16
    ISSN: 0009-2940
    Keywords: Binuclear molybdenum rhenium carbonyl complexes ; σ,π-C4 and σ,π-C7 hydrocarbon bridges ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Addition of Organometallic Nucleophiles to Coordinated 1,3-Dienes, Trimethylenemethane, and Cycloheptatrienyl: Heterobimetallic Carbonyl Molybdenum Rhenium Complexes with σ,π-C4 and -C7 Hydrocarbon BridgesThe addition of organometallic nucleophiles to and gives the heterobimetallic η1:η3-hydrocarbon-bridged complexes 1-8. [Re(CO)5]- reacts with [(OC)3Mo(β7-C7H7)]+ to give the product of nucleophilic attack (OC)3Mo(μ-η1:η6-C7H7)-exo-Re(CO)5 (9) and the redox product (OC)3Mo(η6-C7H7—C7H7) (10). The crystal structures of Cp(OC)2Mo(μ-η1:η3-CH3CHCHCHCH2)Re(CO)5 (3), 9, and 10 have been determined by X-ray diffraction.
    Notes: Die Addition der metallorganischen Nucleophile [M(CO)5]- (M = Mn, Re) an [CpMo(CO)2(dien)]+, [CpMo(CO)2(cyclopentadien)]+, [CpMo(CO)2(cyclohexadien)]+ und [CpMo(CO)2-(trimethylenmethan)]+ liefert die heterobimetallischen η1:η3-Kohlenwasserstoff-verbrückten Komplexe 1-8. [Re(CO)5]- setzt sich mit [(OC)3Mo(η7-C7H7)]+ zum Produkt des nucleophilen Angriffs (OC)3Mo(μ-η1:η6-C7H7)-exo-Re(CO)5 (9) und zum Redoxprodukt (OC)3Mo(η6-C7H7—C7H7) (10) um. Die Strukturen von Cp(OC)2Mo(μ-η1:η3-CH3CHCHCHCH2)Re(CO)5 (3) sowie von 9 und 10 wurden röntgenographisch gesichert.
    Additional Material: 3 Ill.
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  • 17
    ISSN: 0009-2940
    Keywords: Cross-Coupling ; Grignard reactions ; Nickel ; Pyrollidinephosphane ; Cooperative effects ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The preparation of both diastereomeric derivatives of 3-(diphenylphosphanyl) pyrrolidine with chiral (tetrahydrofuran-2-yl)methyl and [(N-neopentyl)pyrrolidin-2-yl]methyl groups as substituents on the pyrrolidine nitrogen atom and of (2S,4S)-1-benzyl-4-(diphenylphosphanyl)-2-(methoxymethyl) pyrrolidine is reported. [3S,P(RS)]-3-(phenylphosphanyl) pyrrolidine, bearing an additional chiral center on phosphorus, is the starting material for the preparation of phosphanes, in which one phenyl group of the PPh2 moiety is substituted by an 2-methoxyphenyl (=An) or 2,4,6-trimethoxyphenyl (=TMP) group. PdI2 complexes of these ligands were separated into diastereomers by chromatography on silica gel columns. The structural chemistry of these novel phosphane diastereomers and their PdI2 complexes is investigated by X-ray crystallography and NMR. At the P,N-coordinated palladium center displacement of an iodide anion is found for P,N,N′ ligands only. In the nickel complex catalysed cross-coupling reaction, yielding 3-phenyl-1-butene, we obtain the highest enantioselectivities in the case of simple 1-alkyl-3-(diphenylphosphanyl)pyrrolidine ligands. The enantioselectivity obtained with diastereomeric derivatives, bearing additional ether or amine ligating sites is mainly determined by the chiral center in 3-position of the 3-(phosphanyl) pyrrolidine part of these ligands. Optimisation of enantioselectivity with these ligands can be carried out by a variation of the ligand to nickel ratio and by the choice of the vinyl halide used as starting compound. The catalytic cycle must contain at least one catalytically active species, bearing more than one β aminoalkylphosphane ligand.
    Additional Material: 3 Ill.
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  • 18
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 116 (1983), S. 659-668 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactions of Glycinato Compounds of Platinum(II), Palladium(II), and Copper(II) with Amide Acetals: Schiff Base ComplexesA series of Schiff base complexes of platinum(II), palladium(II), and copper(II) 1-4 has been obtained from glycinato chelate compounds and amide acetals. The structure of the complexes has been determined by their IR and NMR spectra, that of 3a by an X ray structure analysis. With trans-bis(glycinato)platinum(II) also reaction with DMF at the α-methylene group of a glycinate ligand has been observed to give a serine derivative as ligand (5), the Schiff base complex 2a being isolated as intermediate. The first step of these reactions always is an attack of the amide acetal at the amino group; the coordinated and activated Schiff base ligands may also react at the α-methylene group.
    Notes: Eine Reihe von Schiffbase-Komplexen von Platin(II), Palladium(II) und Kupfer(II) 1-4 wird aus Glycinato-Chelatkomplexen und Amidacetalen erhalten. Die Struktur der Verbindungen wird spektroskopisch, die von (3a) durch Röntgenstrukturanalyse bestimmt. Bei trans-Bis(glycinato)platin(II) wird mit DMF auch Reaktion an der α-Methylengruppe eines Glycinat-Linganden unter Bildung eines Serinderivats als Liganden (5) beobachtet, wobei der Bis(Schiffbase)-Komplex 2a als Zwischenprodukt isoliert werden kann. Amidacetale greifen (Glycinato)platin(II)-Komplexe primär stets an der Aminogruppe an, erst im zweiten Schritt kann die Reaktion an der α-Methylengruppe des koordinierten Schiffbase-Liganden erfolgen.
    Additional Material: 5 Tab.
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  • 19
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 117 (1984), S. 1003-1012 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Dichloropalladium(II) Complexes with α-Amino Acids, α-Amino Acid Esters, Dipeptides, and Dipeptide EstersA series of trans-dichloropalladium(II) complexes Cl2PdL2 (L = α-amino acid, α-amino acid ester, dipeptide, dipeptide esters) and cis-Cl2Pd(histidine) has been prepared and spectroscopically characterized. The X-ray structure of trans-Cl2Pd(GlyOEt)2 (3b) has been determined.
    Notes: Eine Reihe von trans-Dichloropalladium(II)-Komplexen Cl2PdL2 mit (L = α-Aminosäure, α-Aminosäureester, Dipeptid, Dipeptidester) sowie cis-Cl2Pd(Histidin) wurde dargestellt und spektroskopisch charakterisiert. Die Röntgenstruktur von trans-Cl2Pd(GlyOEt)2 (3b) wurde bestimmt.
    Additional Material: 1 Ill.
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  • 20
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 118 (1985), S. 931-942 
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Metal Complexes with Biologically Important Ligands, XXXIV. Allyl-Palladium(II) and Triphenylphosphane Gold(I) Complexes with Nucleobases and NucleosidesThe reactions of (η3-allyl)Pd(μ-Cl)2Pd(η3-allyl) (A) and (COD)Rh(μ-Cl)2Rh(COD) with nucleobases and nucleosides give the complexes (η3-C3H5)Pd(L)Cl (1) (L = inosine, adenosine, guanosine, cytosine, cytidine, 2-thiouracil, 2-thiocytosine) and (COD)Rh(cytosine)Cl (2), respectively. With adenosine and purine also ligand bridged complexes (η3-C3H5)(Cl)Pd—L—Pd(Cl)(η3-C3H5) (3) have been obtained. Ph3PAuCl reacts with the anions L′ of purine, adenine, uridine, and inosine to give the complexes Ph3PAuL′ (5). Ph3PAu+ is added to both N atoms of the dianion of uracil with formation of 6. The coordination of the nucleobases is discussed on the basis of the 1H and 13C NMR spectra. The X-ray structure of Ph3PAu(adeninate) (5b) has been determined.
    Notes: Die Umsetzung von (η3-Allyl)Pd(μ-Cl)2Pd(η3-Allyl) (A) sowie von (COD)Rh(μ-Cl)2Rh(COD) mit Nucleobasen und Nucleosiden liefert unter Spaltung der Chlorobrücken die Komplexe (η3C3H5)-Pd(L)Cl (1) (L = Inosin, Adenosin, Guanosin, Cytosin, Cytidin, 2-Thiouracil, 2-Thiocytosin) bzw. (COD)Rh(Cytosin)Cl (2). Mit Adenosin und Purin wurden auch Ligand-verbrückte Komplexe (η3-C3H5)(Cl)Pd—L—Pd(Cl)(η3-C3H5) (3) erhalten. Ph3PAuCl setzt sich mit den Anionen L′ von Purin, Adenin, Uridin und Inosin zu Ph3PAuL′ (5) um; Ph3PAu+ addiert sich an die beiden N-Atome des Dianions von Uracil unter Bildung von 6. Die Koordination der Nucleobasen wird anhand der 1H- und 13C-NMR-Spektren diskutiert. Die Struktur von Ph3PAu (Adeninat) (5b) wurde röntgenographisch bestimmt.
    Additional Material: 1 Ill.
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