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  • Articles  (8)
  • X-ray structure  (8)
  • 2000-2004  (8)
  • Geosciences  (8)
  • Technology
  • 1
    Electronic Resource
    Electronic Resource
    The synthesis and crystallographic characterization of the heterobimetallic dodecanuclear cage cluster: [Et4N]2[(Mo2Ag2S2O2edt2)3(μ6-S)]·3H2O (edt=−SC2H4S−) (2000)
    Springer
    Journal of chemical crystallography 30 (2000), S. 55-60 
    Details
    ISSN: 1572-8854
    Keywords: heterobimetallic ; dodecanuclear ; Mo-Ag-S cage cluster ; X-ray structure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The crystal structure of the title compound, [Et4N]2[(Mo2Ag2S2O2edt2)3(μ6-S)]·3H2O (edt=SC2H4S−), has been investigated by X-ray diffraction techniques, the crystal is tetragonal, space group P4l2l2, with a = b = 13.4801(4), c = 37.7381(14) Å, V = 6857.5(4) Å3 andZ = 4. The anion of the title compound can be viewed as a cage consisting of three [Mo2S2O2(S2C2H4)2]2−/2 Ag+ fragments, with an S2− at the cage center bonding to six Ag atoms. The cage has two big windows each composed of a puckered Ag3S6C6 15-membered ring.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009550200651
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  • 2
    Electronic Resource
    Electronic Resource
    X-ray structure of [(μ-H)Os3(CO)10(μ-1,8-η2-C9H6N)] (2000)
    Springer
    Journal of chemical crystallography 30 (2000), S. 773-776 
    Details
    ISSN: 1572-8854
    Keywords: X-ray structure ; triosmium cluster ; decacarbonyl ; quinoline
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Decacarbonyl-μ-hydrido-μ-1,8-η2-quinoline-triosmium crystallizes in the triclinic space group P $$\bar 1$$ with a = 7.8551(6), b = 9.1283(8), c = 16.7915(8) Å, α = 74.788(2), β = 88.086(2), γ = 66.392(3)°, V = 1062.22(13)° Å3, T = 150 K, and Z = 2. The molecule consists of an Os3 triangle with the hydride and the heterocyclic ligand bridging the same Os—Os edge. The heterocyclic ligand is coordinated through the C(8) carbon and nitrogen atoms in a new μ-1,8-η2-bonding mode. The Os—Os distances lie in the close range 2.8837(4)–2.9034(4) Å with an average value of 2.892(7) Å.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1013268023526
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  • 3
    Electronic Resource
    Electronic Resource
    X-ray diffraction structure of the phosphido-bridged mixed-metal cluster Fe2(CO)6(μ3-PPh)2Pt(dppe) (2000)
    Springer
    Journal of chemical crystallography 30 (2000), S. 233-236 
    Details
    ISSN: 1572-8854
    Keywords: Mixed-metal clusters ; phosphido-bridged clusters ; X-ray structure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Treatment of Fe2(CO)6(μ2-PPhH)2 with BuLi (2 equiv.), followed by the addition of PtCl2 (dppe), affords the phosphido-bridged cluster Fe2(CO)6(μ3-PPh)2Pt(dppe). The Fe2Pt cluster was isolated and characterized in solution by IR and 31P NMR spectroscopy, and the molecular structure of Fe2(CO)6(μ3-PPh)2Pt(dppe) determined by X-ray diffraction analysis. Fe2(CO)6(μ3-PPh)2Pt(dppe) crystallizes in the orthorhombic space group Pbca, a = 17.539(3) Å, b = 21.490(2) Å, c = 22.959(3) Å, V = 8653.5(18) Å3, Z = 8, dcalc = 1.670 g cm−3; R = 0.0644, Rw = 0.0389 for 5040 observed reflections with I 〉 3σ(I).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009586921599
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  • 4
    Electronic Resource
    Electronic Resource
    Crystal structure of the nonlinear optical compound L-arginine fluoride (2000)
    Springer
    Journal of chemical crystallography 30 (2000), S. 411-414 
    Details
    ISSN: 1572-8854
    Keywords: L-arginine fluoride ; second harmonic generator ; X-ray structure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract L-arginine fluoride is a promising compound that exhibits nonlinear optical properties. It efficiently converts two single photons of the same polarization and frequency ω to one photon of frequency 2ω (type I phase matching). C6H15N4O2 +F− is monoclinic, space group P21, a = 5.4475(4) Å, b = 8.5133(6) Å, c = 10.2195(7) Å, β = 93.475(6)°. The cation has a zwitterionic form, protonated at both the guanidyl and amino groups. The arginine Cγ atom is in a trans position to the carboxyl group. A complex three-dimensional hydrogen bond network links the anions and cations together.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009586023285
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  • 5
    Electronic Resource
    Electronic Resource
    Spectroscopic study of phosphine selenide complexes of Au(I) and X-ray structure of [(cyclohexyl)3PSeAuBr] (2000)
    Springer
    Journal of chemical crystallography 30 (2000), S. 731-735 
    Details
    ISSN: 1572-8854
    Keywords: phosphine selenide ; Au(I) ; X-ray structure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The X-ray structure determination of the complex, [(cyclohexyl)3PSe-AuBr], revealed a triclinic space group P-1, with a = 9.7654(7), b = 10.9441(9), c = 11.2064(9) Å, α = 117.076(6)°, β = 99.076(6)° γ = 95.417(6)°, V = 1034.07(14) Å3 and Z = 2. The Au(I) atom in this complex has a linear coordination with Se1 atom at 2.3776(9) Å on one side and Br1 at 2.3843(9) Å at the trans position making the Se1-Au1-Br1 angle of 177.97(4)°. The P1 atom in the phosphine has tetrahedral geometry. All three cyclohexyl groups are in their usual boat conformation. The phosphorus atom of the triphenylphosphine is approximately perpendicular to the Se1—Au1—Br1 linkage with P1—Se1—Au1 angle of 99.19(6)°. The Δδ in the 31P NMR of the free ligands and their corresponding L—Se—Au—Br (L—Se = trialkyl/arylphosphine selenides) complexes, and the changes in the P—Se bond frequencies in the FTIR upon complexation, are indicative of the bonding of the ligand to Au(I) through selenium. There is a strong corelation between the chemical shifts of the 31P NMR and the C—P—C angle in the phosphines.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1012202328695
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  • 6
    Electronic Resource
    Electronic Resource
    Molecular and crystal structure of [NO2Py]2[Ni(mnt)2](NO2Py=1-(4-nitrobenzyl)pyridinium, mnt2−=maleonitriledithiolate) (2000)
    Springer
    Journal of chemical crystallography 30 (2000), S. 91-94 
    Details
    ISSN: 1572-8854
    Keywords: 1-(4-Nitrobenzyl)pyridinium ; bis(maleonitriledithiolato)nickelate(II) complex ; X-ray structure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The structure of [NO2Py]2[Ni(mnt)2], as determined by x-ray single crystal analysis, consists of two 1-(4-nitrobenzyl)pyridinium cations and one [Ni(mnt)2]2− anion. The crystallographic data for the complex:monoclinic P21/n, a = 9.913(2) Å, b = 11.968(2) Å, c = 14.566(3) Å, β = 100.36(3)°, V = 1699.9(6) Å3, Z = 2. The [Ni(mnt)2]2− anion has a crystallographically imposed center of symmetry and exhibits a relatively planar structure. The cation, [NO2Py]+, adopts a conformation where both the aromatic rings are twisted to the C11-C10-N3 reference plane. The anions (A) and the cations (C) consist of alternating layers (i.e., of type ···C1A1C2A2C1A1C2···) along the c axis of the crystallographic unit cell.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009509427097
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  • 7
    Electronic Resource
    Electronic Resource
    X-ray structural analysis of a copper(I) adduct of the Rh(III) trihydride [(triphos)RhH3], with triphos = CH3C(CH2PPh2)3 (2000)
    Springer
    Journal of chemical crystallography 30 (2000), S. 321-328 
    Details
    ISSN: 1572-8854
    Keywords: Rhodium ; copper ; hydride ; X-ray structure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The binuclear compound [(triphos)RhH(μ-H)2Cu(diphos*)]+ with triphos = CH3C(CH2PPh2)3 and diphos* = o-C6H4(CH2P(C6H11)2)2 has been prepared and characterized. It crystallizes as [CF3SO3] salt in the monoclinic P21/c space group with Z = 4, a = 13.802(4)Å, b = 19.462(4)Å, c = 26.604(5)Å, β = 99.8(3)°, and V = 7041(3)Å3. The structure of the complex consists of two metal fragments with hydride ligands bridging the Rh-Cu contact. The hydride ligands were not located by X-rays but, from the arrangement of the heavy atoms and by methods of potential energy, the most probable positions of two hydride ligands bridging the Rh-Cu interaction and one that remains terminal on the rhodium atom, were obtained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009509207702
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  • 8
    Electronic Resource
    Electronic Resource
    Reactions of [Mn2(μ-pyS)2(CO)6] with bidentate phosphines: X-ray structure of [Mn(η2-pyS) (η2-dppp)(CO)2] [dppp = Ph2P(CH2)3PPh2, pySH = pyridine-2-thiol] (2000)
    Springer
    Journal of chemical crystallography 30 (2000), S. 379-383 
    Details
    ISSN: 1572-8854
    Keywords: Manganese ; pyridine-2-thiolate ; bis(diphenylphosphino)propane ; X-ray structure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The dimeric complex [Mn2(μ-pyS)2(CO)6] (1) reacted with 2 molar equivalents of Ph2P(CH2)3PPh2 (dppp) and Ph2P(CH2)2PPh2 (dppe) to give the respective monomeric chelate complexes [Mn(η2-pyS)(η2-dppp)(CO)2] (2) and [Mn(η2-pyS)(η2-dppe)(CO)2] (3). In contrast, with 2 molar equivalents of Ph2P(CH2)5PPh2 (dpppe), 1 gave the highly insoluble polymeric complex [Mn(η2-pyS)(μ-dpppe)(CO)2]n (4). An X-ray structure determination shows that 2 crystallizes in the monoclinic space group P21/n with a = 10.721(2) Å, b = 19.712(5) Å, c = 14.846(4) Å, β = 109.06(2)°, V = 2965.5(14) Å3, and Z = 4. The complex has a distorted octahedral geometry with the dppp ligand, one CO group and the N atom of the chelating pyS ligand occupying equatorial sites, and one CO group and the S atom of the pyS ligand lying in the axial positions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009525704630
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