Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Electronic Resource  (4)
  • diphosphine ligand  (2)
  • hydrogen bonding  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Molecular structures of M(tfac)3 (M=Al, Co) and Cu(H2O)(fod)2: Examples of unusual supramolecular architecture (1998)
    Springer
    Journal of chemical crystallography 28 (1998), S. 815-824 
    Details
    ISSN: 1572-8854
    Keywords: M(acac)3 derivatives ; isomorphous ; β-diketonate ligands ; hydrogen bonding
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The molecular structures of Al(tfac)3 (1), Co(tfac)3 (2) (H-tfac = 1,1,1-trifluoroacetylacetone) and Cu(H2O)(fod)2 (3) (H-fod = 1,1,1,2,2,3,3-hepta-fluoro-7,7-dimethyloctane-4,6-dione) have been determined. The metal coordination spheres in compounds 1 and 2 are essentially the same as the respective M(acac)3 derivatives. Despite the isomorphous nature of the structures of compounds 1 and 2, the identity of the nearest intermolecular van der Waals contacts are altered by minor changes in the metal coordination sphere. The geometry about copper in compound 3 is close to that of an ideal square bipyramid with the β-diketonate ligands occupying the basal plane. The water ligand in each molecule of compound 3 is hydrogen bonded to an oxygen of a β-diketonate ligand on an adjacent molecule resulting in the formation of dimers, which form rods along the y-axis due to weak C–F···Cu interactions. Crystal data: (1) orthorhombic, Pca21, a = 14.949(3), b = 19.806(4), c = 13.624(3) Å, V = 4033(1) Å3, and Z = 8, and (2) orthorhombic, Pca21, a = 14.930(3), b = 19.620(4), c = 13.540(3) Å, V = 3966(1) Å3, and Z = 8,; (3) monoclinic, P21/c, a = 12.447(3), b = 10.486(2) c = 21.980(4) Å, β = 102.65(3)°, V = 2799(1) Å3, and Z = 4.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1021827720374
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Chelation of a diphosphine ligand at FeCo2(CO)9(μ3-S): Spectroscopic and X-ray diffraction data for FeCo2(CO)7(bpcd)(μ3-S) (1999)
    Springer
    Journal of chemical crystallography 29 (1999), S. 391-397 
    Details
    ISSN: 1572-8854
    Keywords: diphosphine ligand ; mixed-metal cluster ; electrochemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The tetrahedrane cluster, FeCo2(CO)9(μ3-S), reacts with the redox-active ligand, 4,5-bis(diphenylphosphino)-4-cyclopenten-1,3-dione (bpcd), to give the disubstituted cluster, FeCo2(CO)7(bpcd)(μ3-S), as the sole product. This diphosphine-substituted cluster contains a cobalt-bound, chelating bpcd ligand. Both IR and 31P NMR spectroscopies have been employed in the solution characterization of FeCo2(CO)7(bpcd)(μ3-S), and the solid-state structure has been unequivocally established by X-ray diffraction analysis. FeCo2(CO)7(bpcd)(μ3-S) crystallizes in the monoclinic space group C2/c, a = 34.494(3) Å, b = 11.4194(9) Å, c = 18.634(2) Å, β = 98.103(7)°, V = 7266.7(9) Å3, Z = 8, and dcalc = 1.584 g/cm3. Cyclic voltammetric studies on FeCo2(CO)7(bpcd)(μ3-S) reveal the presence of two quasireversible redox responses assigned to the 0/1− and 1−/2− redox couples. The orbital composition of these redox couples has been examined by carrying out extended Hückel MO calculations on the model complex FeCo2(CO)7(H4-bpcd)(μ3-S), with the results being compared to related cluster compounds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009502708303
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    X-ray diffraction structure of Co2(CO)4(μ-PhC≡CH)[(Z)-Ph2PCH=CHPPh2[: proof for diphosphine ligand chelation (2000)
    Springer
    Journal of chemical crystallography 30 (2000), S. 627-632 
    Details
    ISSN: 1572-8854
    Keywords: X-ray diffraction ; dicobalt compound ; diphosphine ligand
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Treatment of the dicobalt compound Co2(CO)6(μ-PhC≡CH) (1) with the unsaturated diphosphine ligand (Z)-Ph2PCH=CHPPh2 gives the chelating diphosphine compound Co2(CO)4(μ-PhC≡CH)[(Z)-Ph2PCH=CHPPh2] (2) when the reaction is carried in refluxing 1,2-dichloroethane or in the presence of Me3NO. 2 was characterized in solution by IR and 31P NMR spectroscopy, and the molecular structure of Co2(CO)4(μ-PhC≡CH)[(Z)-Ph2PCH=CHPPh2] was established by X-ray diffraction analysis, which confirmed the chelation of the P-ligand to a single cobalt center. Co2(CO)4(μ-PhC≡CH)[(Z)-Ph2PCH=CHPPh2] crystallizes in the monoclinic space group P21/c, a = 10.151(1), b = 32.694(5), c = 11.051(5) Å, β = 111.14(1)°, V = 3420.7(9) Å3, Z = 4, and d calc = 1.414. The two distinct 31P resonances found in the 31P NMR spectrum of 2 are discussed relative to the X-ray structure and other structurally similar cobalt–alkyne complexes. Thermolysis of Co2(CO)4(μ-PhC≡CH)[(Z)-Ph2PCH=CHPPh2] led only to the slow decomposition of Co2(CO)4(μ-PhC≡CH)[(Z)-Ph2PCH=CHPPh2] and not to the formation of the isomeric bridged-diphosphine complex.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1011940014273
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Reaction of early transition metal complexes with macrocycles. II. Synthesis and structure of TiCl3(H2O) · 18-crown-6, a compound with a unique bidentate bonding mode for the 18-crown-6 molecule (1986)
    Springer
    Journal of inclusion phenomena and macrocyclic chemistry 4 (1986), S. 241-246 
    Details
    ISSN: 1573-1111
    Keywords: Crown ether ; early transition metal ; hydrogen bonding ; crystal structure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract 18-crown-6 reacts with TiCl3 in CH2Cl2 to form a complex in which the crown ether functions as a tridentate ligand. Addition of moist hexane affords a molecular complex in which the crown ether functions as a bidentate ligand. A water molecule is bonded directly to the titanium atom and is further hydrogen bonded to three of the oxygen atoms of the crown. The deep blue crystals of the CH2Cl2 adduct belong to the monoclinic space groupP21/n witha=13.481(8),b=8.021(5),c=21.425(9) Å, β=97.32(5)°, andρ calc = 1.51 g cm−3 forZ=4. Refinement led to a conventionalR value of 0.040 based on 873 observed reflections. The Ti−O bond distances for the crown oxygen atoms are 2.123(8) and 2.154(9) Å, while the oxygen atom of the water molecule is bonded at 2.072(8) Å. The octahedral coordination sphere of the titanium atom is completed by the three chlorine atoms at distances of 2.340(5), 2.352(4), and 2.373(4) Å.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00657997
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...