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  • Platinum  (7)
  • Iridium complexes  (5)
  • 1
    Electronic Resource
    Electronic Resource
    The Molecular Structure of Some Transition-Metal Complexes with 1,2,3,4-Tetrazole-5-thiolate Anions (1998)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 1998 (1998), S. 93-99 
    Details
    ISSN: 1434-1948
    Keywords: 2-Methyl-1,2,3,4-tetrazole-5-thiolates ; 2-Phenyl-1,2,3,4-tetrazole-5-thiolates ; Palladium ; Platinum ; Copper ; Silver ; Gold ; Molecular structures ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The molecular structures of nine transition metal tetrazolethiolates have been determined by X-ray structure determinations. The ligand is invariably coordinated through its sulfur atom to the metal center [M = PdII, CuI, AgI, AuI, AuIII, and Hg]. The M-S-C bond angles vary considerably, but this cannot be correlated with variations in the C-S bond lengths. Intermolecular association occurs for Ph3PAu(SCN4Me) via Au-S contacts, leading to dimeric strands in the solid state. The copper compound (Ph3P)3Cu4(SCN4Me)4 (5), possesses a rather asymmetric structure: one Cu atom is tricoordinated by 3 sulfur atoms, the other three are tetracoordinated by P and N as well as by S atoms.
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  • 2
    Electronic Resource
    Electronic Resource
    Oxidative Addition of α-Bromoglycine to Palladium(0) and Platinum(0) Complexes: α-Metallated Amino Acids as Models for Intermediates in the Metal-Catalyzed Hydrogenation of Dehydroamino Acids (1998)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 1998 (1998), S. 375-379 
    Details
    ISSN: 1434-1948
    Keywords: α-Metallated amino acids ; Palladium ; Platinum ; Oxidative addition ; α-Bromoglycinate ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Oxidative addition of methyl N-benzoyl-2-bromoglycinate to bis(dibenzylideneacetone)palladium, in the presence of 2,2′-bipyridyl, and to (Ph3P)2Pt(η2-C2H4) gives the α-metallated glycine esters 1a and 2a. Abstraction of bromide from 1a, 2a, using AgSbF6 or AgBF4, affords the cationic C,O-chelate complexes [(bpy)Pd-CH(CO2Me)NHC(Ph)O]+ (1b,c) and [(Ph3P)2Pt-CH(CO2Me)NHC(Ph)O]+ (2b), respectively, featuring coordination of the amide O atom. The complexes 1b and 2b have been characterized by X-ray diffraction.
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  • 3
    Electronic Resource
    Electronic Resource
    Organometallic Complexes of Iridium, Palladium, Chromium and Iron from 2-Phenyl-5(4H)-oxazolones - Organometallic Labelled Dipeptides (1998)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 1998 (1998), S. 485-493 
    Details
    ISSN: 1434-1948
    Keywords: 2-Phenyl-4-R-5(4H)-oxazolones ; Iridium ; Palladium ; Platinum ; Iron ; Chromium ; C-o,N-Bridging 2-phenyloxazolone ; Peptide labelling ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Reactions of 2-phenyl-4-R-5(4H)-oxazolones (R = Me, CH2Ph, CHMeEt) with [(η5-C5Me5)IrCl2]2 afforded the cyclometallated complexes (η5-C5Me5)(Cl)Ir(L) (1-3) [L = 2-phenyl-4-R-5(4H)-oxazolone(C-o,N)]. 2-Phenyl-5(4H)-oxazolone reacts with [(η5-C5Me5)IrCl2]2 and palladium(II) acetate to give complexes with a C-o,N-bridging oxazolone [(η5-C5Me5)(Cl)Ir]2(μ-Cl)(μ-L-H+) (4) and Pd3(μ-ac)5(μ-L-H+) (5). 2-Phenyloxazolone anions were added to the π ligands of [(η5-C6H7)Fe(CO)3]+ and [(η7-C7H7)Cr(CO)3]+ to give the adducts 6-11. Dipeptide derivatives 12-18 were obtained by reaction of 1, 2 and by reaction of the adduct 6 from [(η5-C6H7)Fe(CO)3]+; and the anion of 2-phenyloxazolone with α-amino acid esters. These reactions may be used for the labelling of peptides. Saponification of 15-18 yields the organometallic substituted peptide acids 19-22. Their dianions (deprotonation of COOH and peptide amide) were used as ligands towards (Ph3P)2PtCl2 to yield the bimetallic complexes 23-25. The structures of 4, 5, 9 and 10 were determined by X-ray diffraction.
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  • 4
    Electronic Resource
    Electronic Resource
    Metal Complexes of Alkyne-Bridged α-Amino Acids (1998)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 1998 (1998), S. 1791-1798 
    Details
    ISSN: 1434-1948
    Keywords: p-Ethynylphenylalanine ; Alkyne-bridged α-amino acids ; N,O-Chelate complexes ; Ferrocenes ; Schiff bases ; Platinum ; Gold ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The palladium-mediated coupling of p-ethynylphenylalanine (p-epa) with different halogenated benzenes yielded alkyne-bridged α-amino acids. A series of cationic mono- to hexanuclear (Ph3P)2Pt complexes with the anions of p-ethynylphenylalanine and alkynyl- or benzene-bridged di-, tri-, tetra- and hexa-ethynyl phenylalanines as N,O-chelate ligands was prepared. N-t-Boc-p-ethynylphenylalanine methyl ester was metal-substituted to give complexes of the types Ph3PAu-C≡C-R and (Et3P)2Pt(C≡CR)2. The benzene-bridged di-, tri-, tetra- and hexa-p-ethynylphenylalanine methyl esters form Schiff bases with ferrocene aldehyde and a tripodal ligand was obtained from Ph2PCH2CH2CH2NH2 and the benzene-bridged tri-ethynylphenylalanine. The structure of (Ph3P)2Pt[NH2C(H)(CH2C6H4C≡CH)CO2]+ BF4- was determined by X-ray diffraction.
    Additional Material: 1 Ill.
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  • 5
    Electronic Resource
    Electronic Resource
    Cinchona Alkaloids as Versatile Ambivalent Ligands - Coordination of Transition Metals to the Four Potential Donor Sites of Quinine (1999)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 1999 (1999), S. 471-482 
    Details
    ISSN: 1434-1948
    Keywords: Quinine ; Cinchonine ; Palladium ; Platinum ; Silver ; Gold ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A series of metal complexes in which quinine (L1) and cinchonine (L2) are coordinated via the four possible donor atoms was prepared and characterized. Coordination of the tertiary N atom of quinine is observed in [L1MPPh3]+NO3- [M = Au (1), Ag (2)], [L1Pd(COD)(Cl)]+ NO3- (3) and L1Pd(Cl)(allyl) (4). The mono anion of quinine functions as N,O chelate ligand in (L1-H+)M(Cl)(PR3) (M = Pd, Pt, 5-10), [(L1-H+)Pd(en)]+NO3- (11) and (L1-H+)2TiCl2 (12). Protection of the tertiary N atom of quinine by methylation or protonation allows the synthesis of the quinoline complexes [(L1CH3+)M(Cl)2(PR3)]+ BF4- (M = Pd, Pt, 14-18), [(L1CH3+)Ir(Cl)2(Cp*)]+ BF4- (19), [(L1+H+)M(Cl)2(PR3)]+ CF3SO3- (M = Pd, Pt, 20-22) and (L2+H+)(ZnCl3-) (23). Quinine and cinchonine act as N,O-N bridge in the complexes (R3P)(Cl)M(μ-L1-H+)M(Cl)2(PR3) (M = Pd, Pt, 24, 25, 27, 28), (Cp*)(Cl)Ir(μ-L1-H1)Ir(Cl)2(Cp*) (29), (EtP3)(Cl)Pd(μ-L2-H+)Pd(Cl)2(PEt3) (26), and as N-N bridge in the complexes [(Ph3P)Au(μ-L1)Au(PPh3)]+NO3- (30) and (allyl)(Cl)Pd(μ-L1)Pd(Cl)(allyl) (31). Coordination of quinine via the C=C double bond occurs in [(L1+2 H+)PtCl3]+Cl- (32). The structures of 11, 13, 19, 23, 26 and 32 were determined by X-ray diffraction. In most cases the coordination mode and the conformation of quinine can also be derived from the 1H-NMR spectra.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Metallkomplexe mit biologisch wichtigen Liganden, LXV. Chirale Halbsandwich-Komplexe von Cobalt(III), Rhodium(III), Iridium(III) und Ruthenium(II) mit α-Aminosäureamid-, Glycinnitril- und Peptidester-LigandenHerrn Professor Dr. H.-D. Stachel zum 65. Geburtstag gewidmet. (1993)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 126 (1993), S. 1969-1980 
    Details
    ISSN: 0009-2940
    Keywords: Cobalt complexes ; Rhodium complexes ; Iridium complexes ; Ruthenium complexes ; Pentamethylcyclopentadienyl ; α-Aminoamide ligands ; Glycinenitrile ligand ; Peptide ester ligands ; Aspartame ; Asparagine ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Metal Complexes with Biologically Important Ligands, LXV[1].  -  Chiral Half-Sandwich Complexes of Cobalt(III), Rhodium(III), Iridium(III), and Ruthenium(II) with α-Amino Amide, Glycinenitrile, and Peptide Ester LigandsCp*Co(CO)I2 (Cp* = η5-C5Me5), [(η6-arene)RuCl2]2 (arene = p-cymene, hexamethylbenzene), and [Cp*MCl2]2 (M = Rh, Ir) react with α-amino amides and various peptide esters to give the N,O-chelate complexes [Cp*(I)Co  -  NH2C(H)(R1)C(NHR2)-O]+ (1), [(η6-arene)(Cl)Ru  -  NH2C(H)(R1)C(NHR2)O]+ (2), and [CP*(Cl)M - NH2CH2C(NHR)O]+ (M = Rh, Ir) (5, in solution), respectively. In the solid state the ligands are η1N-bonded in 5. By deprotonation of the peptide bond in 2 and 5 the neutral N, N-chelate complexes (η6-arene)(Cl)Ru  -  NH2C(H)(R1)C(O)-N̊2 (6) and Cp*(Cl)M  -  NH2C(H)(R1)C(O)NR2 (M = Rh, Ir) (7) have been obtained. Glycinenitrile is η1-bonded in (η6-p-cymene)(Cl)2Ru(NH2CH2CN) (3) and Cp*(Cl)2Rh(NH2CH2CN) (4). Double deprotonated triglycine methyl ester is a N,N,N-tridentate ligand in (η6-C6Me6)Ru(NH2CH2C(O)NCH2C(O)-NCH2CO2Me) (8). The anions of L-asparagine and of aspartame (L-aspartyl-L-phenylalanine methyl ester) give the complexes 9-12 with tridentate O,N,O- or O,N,N-chelate ligands. The crystal structures of 1d (L = glyglyOEt), 5a (L = glycinamide), 6e (L = glyglyOEt), and 7k (L = glyglyglyOEt) have been determined by X-ray structural analysis.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19931260903
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  • 7
    Electronic Resource
    Electronic Resource
    Metal Complexes of Biologically Important Ligands, XCIV. Hexanuclear Isocyanide and Carbene Metal Complexes from Neomycin BDedicated to Professor Armin Weiß on the occasion of his 70th birthday. (1997)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 130 (1997), S. 1659-1662 
    Details
    ISSN: 0009-2940
    Keywords: Hexadeamino-hexaisocyano-neomycin B ; Organometallic complexes ; Gold ; Chromium ; Rhodium ; Iridium ; Ruthenium ; Palladium ; Platinum ; Hexanuclear carbene gold(I) complexes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: From the amino glycoside neomycin B, the acetate-protected hexaisocyanide 4 has been prepared. 4 forms the hexanuclear complexes [(4)(AuCl)6] (5), {(4)[Cr(CO)5]6}, {(4)[MCl2(η5-C5Me5)]6} (M = Rh, Ir), {(4)[RuCl2(p-cymene)]6}, {(4)-[MCl2(PR3)]6} (M=Pd, Pt), and 4{(4)[PdCl(C6H4CH2NMe2)]6). The hexaisocyanohexagold(I) complex 5 reacts with H2NtBu and PhNH2 to give the corresponding carbene complexes. The compounds have been characterized by IR, 13C- and 31P-NMR spectroscopy, and (partially) by FAB-MS data.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19971301117
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  • 8
    Electronic Resource
    Electronic Resource
    Hydrocarbon-Bridged Complexes, XL. Polyene-Bridged Iridium(III), Palladium(II), and Platinum(II) Complexes of Schiff Bases from α,ω-Polyene Dialdehydes and α-Amino Acids or o-AminophenolDedicated to Professor Dieter Seebach on the occasion of his 60th birthday. (1997)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 130 (1997), S. 1467-1473 
    Details
    ISSN: 0009-2940
    Keywords: Schiff bases ; Polyene dialdehydes ; α-Amino acids ; Pantamethylcyclopentadienyl complexes ; P ligands ; Iridium ; Palladium ; Platinum ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Schiff bases 1—11 were synthesized from α-amino acids or o-aminophenol and crocetindialdehyde, 2,7-dimethyloctatrienedial, terephthalaldehyde, or β,β′ -p-phenylendiacroleine. The reactions of these Schiff bases with chloro-bridged complexes [(R3P)(Cl)M(η-Cl)]2 (M = Pd, Pt) and [(C5Me5)(Cl)Ir(°Cl)]2 gave the dinuclear complexes 12-31.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19971301018
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  • 9
    Electronic Resource
    Electronic Resource
    Metallkomplexe mit biologisch wichtigen Liganden, LVIII. C-Allylglycin- und C-Vinylglycin-Komplexe von Palladium(II), Platin(II), Rhodium(III), Iridium(III) und deren Reaktionen mit Nucleophilen (1991)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 124 (1991), S. 1065-1073 
    Details
    ISSN: 0009-2940
    Keywords: Palladium complexes ; Platinum complexes ; Rhodium complexes ; Iridium complexes ; Glycine, C-allyl-, C-vinyl- ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Metal Complexes of Biologically Important Ligands, LVIII. - C-Allylglycine and C-Vinylglycine Complexes of Palladium(II), Platinum(II), Rhodium(III), Iridium(III) and Reactions with NucleophilesThe synthesis of the complexes (R13P)(Cl2Pt(C-allylglycine ester) (1), (2) and of (η5-C5Me5)Ir(C-allylglycinate) (6) with tridentate O,N,η2;-C—C allylglycinate as ligand is described. Addition of enolates (Nu-) to the coordinated C=C bond of 2 gives the γ-C-metallated α-amino acid ester complexes (3). In most cases the platination occurs stereoselectively to yield the five-membered metallacycle with the substitutents CH2Nu and CO2R2 in trans position. From 3d the new α-amino acid H2NCH(CO2Me)-(CH2)3C(Ph)(CO2Et)21 (4) is cleaved. The structures of 3c and 6 have been determined by X-ray diffraction. C-Vinylglycinate can be stabilized at the metal atom in the complexes (10) (M=Rh, Ir).
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19911240513
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  • 10
    Electronic Resource
    Electronic Resource
    Metallkomplexe von Farbstoffen, III. Übergangsmetall-Komplexe mit Pyrrolindigo (1992)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 125 (1992), S. 2347-2350 
    Details
    ISSN: 0009-2940
    Keywords: Indigo, octahydro- ; Pyrrole indigo, 4,4′-dibutyl-5,5′-dimethyl- ; Zinc complexes ; Copper complexes ; Rhodium complexes ; Iridium complexes ; Palladium complexes ; Platinum complexes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Metal Complexes of Dyes, III[1,2]. - Transition Metal Complexes of Pyrrole Indigo The dianions of octahydroindigo and 4,4′-dibutyl-5,5′-dimethylpyrrole indigo (L) react with metal salts and chloro-bridged complexes [(μ-Cl)M(Cl)PR3]2 (M = Pd, Pt; R = nBu, Et), [(μ-Cl)M(Cl)(η5-C5Me5)]2 (M = Rh, Ir) to give the bis-N,O chelate complexes [M(L - 2H+)]n (M = Cu, Zn), (L - 2H+)[M(Cl)(PR3)]2 (M = Pd, Pt), and (L - 2H+)[M(Cl)(η5-C5Me5)]2 (M = Rh, Ir). The electronic spectra of the soluble complexes with phosphane or C5Me5 ligands show a large bathochromic shift of the absorptions in the visible region compared to the free neutral ligands which is in accordance with PPP calculations of model compounds.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19921251103
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