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  • 1990-1994  (3)
  • Platinum complexes  (2)
  • Iron  (1)
  • 1
    Digitale Medien
    Digitale Medien
    Synthesis and crystal structures of heterobimetallic Fe-Cd, Fe-Zn, and Fe-In complexes containing hemilabile phosphorus/oxygen and silicon/oxygen bridging ligands (1992)
    Springer
    Journal of cluster science 3 (1992), S. 275-296 
    Details
    ISSN: 1572-8862
    Schlagwort(e): Iron ; cadmium ; zinc ; indium ; bimetallic complexes ; functional phosphines ; alkoxysilyl ; bridging ligands ; crystal structures
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Maschinenbau , Physik
    Notizen: Abstract The reactions of K[Fe{Si(OMe)3}(CO)3(P∼Y)][P∼Y=Ph2PCH2C(O)Ph, Ph2PCH2C(O)[(η-C5H4)FeCp] (Cp=η5-C5H5), Ph2P(CH2)2CN] with CdCl2·2.5H2O, ZnX 2 (X=Cl, I) or InCl3 afforded Fe-Cd-Fe or Fe-M(μ-X)2 M-Fe (M=Cd, Zn, In;X=Cl, I) and Fe-InCl2 complexes. Some of them contain an unusual and labile μ-η2-SiO alkoxysilyl bridge which may be associated with a bridging mode for the ketophosphine ligand (first such example structurally established), thus providing original results in bimetallic chemistry on the intramolecular coordination of oxygendonor functions ofchemically different hemilabile ligands firmly attached to a neighboring metal center. The structures of the trinuclear complex (3), of the chlorobenzene solvate of the tetranuclear complex (4a·C6H5Cl) and of [mer-(OC)3{(EtO)3Si} (4e) have been determined by X-ray diffraction. Crystals of 3 are orthorhombic, space groupPbcn, witha=19.010(4),b=11.766(5),c=26.998(7)Å, andZ=4. Crystals of4a·C6H5Cl are monoclinic, space groupC2/c witha=22.455(3),b=17.680(2),c=16.627(4)Å, β=90.80(4)°, andZ=4. Crystals of4e are monoclinic, space groupC2/c witha=25.392(5),b=18.554(6),c=16.28(1)Å, β=120.73(3)°, andZ=4. The structures were solved using direct methods and Fourier difference techniques and refined by blocked full-matrix least squares toR=0.035 (R w =0.049) for 2719 observed reflections, toR=0.042 (R w =0.056) for 3082 observed reflections, and toR=0.057 (R w =0.075) for 1850 observed reflections for3, 4a·C6H5Cl and4e, respectively. The Fe-Zn complexes (9a), (9b) and (9c) were prepared and characterized by spectroscopic methods.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01028547
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  • 2
    Digitale Medien
    Digitale Medien
    Übergangsmetall-Silyl-Komplexe, 44. Darstellung der zweikernigen Silyl-Komplexe (CO)3(R3Si)Fe(μ-PR′R′′)Pt(PPh3)2 durch oxidative Addition von (CO)3(R′R′′HP)Fe(H)SiR3 an (C2H4)Pt(PPh3)2 (1993)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 126 (1993), S. 17-21 
    Details
    ISSN: 0009-2940
    Schlagwort(e): Dinuclear complexes ; Iron complexes ; Platinum complexes ; Silyl complexes ; Phosphide bridges ; Chemistry ; Inorganic Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Transition Metal Silyl Complexes, 44.  -  Preparation of the Binuclear Silyl Complexes (CO)3(R3Si)Fe(μ-PR′R′′)Pt(PPh3)2 by Oxidative Addition of (CO)3(R′R′′HP)Fe(H)SiR3 to (C2H4)Pt(PPh3)2The complexes (CO)3(R′R′′HP)Fe(H)SiR3 (1) [PHR′R′′ = PHPh2, PH2Ph, PH2Cy; SiR3 = SiPh3, SiPh2Me, SiPhMe2, Si(OMe)3] react with Pt(C2H4)(PPh3)2 to give the dinuclear, silyl-substituted complexes (CO)3(R3Si)Fe(μ-PR′R′′)Pt(PPh3)2 (2) in high yields. Upon reaction of 2 (R = R′ R′′ = Ph) with CO, the PPh3 ligand at Pt being trans to the PPh2 bridge is exchanged, and (CO)3(Ph3Si)Fe(μ-PPh2)Pt(PPh3)CO (3) is formed. Complex 3 is characterized by an X-ray structure analysis. The rather short Fe  -  Si distance [233.9(2) pm] and the infrared spectrum of 3 indicate that the Fe  -  Pt bond is quite polar.
    Zusätzliches Material: 2 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/cber.19931260104
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  • 3
    Digitale Medien
    Digitale Medien
    Übergangsmetall-Silyl-Komplexe, 48. Synthese neuartiger heteronuklearer Silyl-Zweikernkomplexe (OC)3(R3Si)Fe(μ-PR′R″)Pt(1,5-COD)(Fe-Pt), Phosphan-Austauschreaktionen an (OC)3 (R3Si)Fe(μ-PR′R″)Pt(PPh3)2(Fe - Pt) und Darstellung der Dihydrido-Komplexe [(OC)3Fe(μ-PPh2)(μ-H)2Pt(PR3)2][BF4](Fe - Pt) (1994)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 127 (1994), S. 295-304 
    Details
    ISSN: 0009-2940
    Schlagwort(e): Heterobimetallic complexes ; Iron complexes ; Platinum complexes ; Silyl complexes ; Phosphido bridges ; Hydrido complexes ; Chemistry ; Inorganic Chemistry
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie
    Notizen: Transition Metal Silyl Complexes, 48[1]. - Synthesis of the New Heterobimetallic Dinuclear Silyl Complexes (OC)3(R3Si)-Fe(μ-PR′R″)Pt(1,5-COD)(Fe-Pt), Phosphane Exchange Reactions of (OC)3(R3Si)Fe(μ-PR′R″)Pt(PPh3)2(Fe-Pt), and Preparation of the Dihydrido complexes [(OC)3Fe(μ-PPh2)(μ-H)2Pt(PR3)2][BF4](Fe-Pt)The dinuclear, silyl-substituted complexes (OC)3(R3Si)Fe(μ-PR′r″)Pt(1,5-COD) (1) [μ-PR′R″ = PPh2, PCY2, PHPh; SiR3 = SiPh3, Si(OMe)3] were prepared in high yields by the oxidative addition of the hydrido complexes (OC)3(PHR′R″)Fe(H)-SiR3 to Pt(1,5-COD)2. Upon reaction of (OC)3(R3Si)Fe(μ-PR′R″)Pt(PPh3)2 [μ-PR′R″ = PPh2, PHCy; SiR3 = SiPh3, SiPh2Me, SiPhMeCl, Si(OMe)3] with two equivalents of PR‴3 (PMe3, PBu3, PEt3) or with one equivalent of chelating di-phosphanes (vdpp, dppe, dppm) both PPh3 ligands are displaced, and (OC)3(R3Si)Fe(μ-PR′R″)Pt(PR‴3)2 or (OC)3(R3Si)-Fe(μ-PR′R″)Pt[(PPh2)2X] (X = C=CH2, C2H4, CH2) are formed, respectively. When one equivalent of PMe3 is used, only the PPh3 ligand trans to the μ-PPh2 bridge is substituted, and (OC)3(Ph3Si)Fe(μ-PPh2)Pt(PPh3)(PMe3 is formed. The 1,5-COD ligand in 1 is displaced by P(OR)3 to give (OC)3-(Ph3Si)Fe(μ-PPh2)Pt[P(OR)3]2 (R = Me, Ph). The complexes (OC)3(Ph3Si)Fe(μ-PPh2)Pt(PMe3)2and (OC)3(Ph3Si)Fe(μ-PPh2)Pt[(PPh2)2C=CH2] were characterized by X-ray structure analysis. The short Fe-Si distances [233.0(2) and 235.6(3) pm] and the infrared v(CO) absorptions indicate that the Fe-Pt bonds are quite polar. Protonation of (OC)3(Me2-PhSi)Fe(μPPh2)Pt(PPh3)2 with CF3COOH gives the hydrido-bridged complex [(OC)3(Me2PhSi)Fe(μ-PPh2)(μ-H)Pt-(PPh3)2][O2CCF3]. Upon addition of an excess of HBF4 · Et2O to (OC)3(R3Si)Fe(μ-PPh2)Pt(PPh3)2 (R = Ph, OMe), (OC)3-Si)Fe(μ-PPh2)Pt[Pt[P(OMe)3]2 or (OC)3(Ph2MeSi)Fe(μ-PPh2)-Pt(dppe) R3SiF is split, and the corresponding μ-dihydrido complexes [(OC)3Fe(μ-PPh2)(μ-H)2Pt(PR3)2][BF4] are obtained.
    Zusätzliches Material: 2 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/cber.19941270204
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