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  • 1
    Electronic Resource
    Electronic Resource
    Photocurrent Imaging of the Layers Formed during the Electrooxidation of Gold (1994)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 116 (1994), S. 3453-3459 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00087a035
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  • 2
    Electronic Resource
    Electronic Resource
    Boron Contamination in Furnace Dry Ashing of Plant Material (1961)
    s.l. : American Chemical Society
    Analytical chemistry 33 (1961), S. 967-968 
    Details
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac60175a049
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  • 3
    Electronic Resource
    Electronic Resource
    Stability of the Curcumin Complex in Boron Determination (1961)
    s.l. : American Chemical Society
    Analytical chemistry 33 (1961), S. 1098-1100 
    Details
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac60176a013
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  • 4
    Electronic Resource
    Electronic Resource
    The Structure of Commercial Pyronin B1 (1962)
    s.l. : American Chemical Society
    The @journal of organic chemistry 27 (1962), S. 2263-2264 
    Details
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jo01053a538
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  • 5
    Electronic Resource
    Electronic Resource
    α-Methyldopa. Resolution and Configuration (1964)
    s.l. : American Chemical Society
    The @journal of organic chemistry 29 (1964), S. 2053-2056 
    Details
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jo01030a532
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  • 6
    Electronic Resource
    Electronic Resource
    Close packing of spheres (1987)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 87 (1987), S. 4207-4210 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The local environment of an "origin'' sphere in an assembly of spheres may be represented by a Voronoi polyhedron or by a polyhedron of simplicial lines. These figures may be projected on to a spherical surface of contacts1 and this representation is used here to examine the number of spheres of one diameter which can be packed regularly in contact with an origin sphere of the same or other diameters. The restriction that in the packings the spheres contacting the origin sphere also make contact with all their neighbor spheres in the contacting shell allows only 15 configurations in the range of radius K (radius of origin sphere/radius of contacting sphere), 0.225〈K〈8.8. The relationship of two of these configurations and the possible structure of the C60 molecule is examined. The reason why a previous model of random close packing produced answers which agreed well with experimental values only for some values of K is revealed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.452925
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  • 7
    Electronic Resource
    Electronic Resource
    Crystal structure of dibenzoylmethane (1966)
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 21 (1966), S. 340-349 
    Details
    ISSN: 0001-5520
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0365110X66002901
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  • 8
    Electronic Resource
    Electronic Resource
    Direct calculations of crystalline thermal expansion and molecular reorientation from nonbonded interatomic potential anharmonicity and thermal amplitudes (1972)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 28 (1972), S. 84-88 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Non-bonded interatomic potential functions were altered to allow for the effects of vibration and anharmonicity by relating the mean displacement to the mean-square vibrational amplitude through the anharmonicity constant, K. Vibrational amplitudes were calculated in the harmonic approximation. The repulsive coefficient, B, of the potential was increased sufficiently to cause the minimum of the potential to shift by the amount of the displacement. The apparent lattice energy was then minimized in the usual manner. The method was checked against experiment by calculation of the lattice constants of noble gases at several temperatures, and of anthracene at two temperatures. The method differs from usual calculations of the Grüneisen type in that calculation of molecular-orientation change with temperature is possible. The anthracene molecular orientation was calculated at 95 and 290°K.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0567739472000178
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  • 9
    Electronic Resource
    Electronic Resource
    Optimally spaced rotational grid points (1973)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 29 (1973), S. 408-414 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Optimal rotational spacing was obtained for n = 2 to 12 orientations of an object in three-dimensional space. For n = 2, 3, and 4 the minimum spacing, χ(min), was 180°, with rotation space not being completely filled. For n = 5 and 6 all spacings are equal to 151.05 and 141.06° respectively. The n = 7 case has two spacings at 134.04 and 180°. The n = 8 case has two spacings at 130.18 and 153.56°. The n = 10 case has three spacings at 128.53, 141.05 and 164.8°. The n = 12 case has two spacings at 120 and 180°. The best arrangement found for n = 9 and 11 was to remove one grid point from n = 10 and 12 respectively. The coordination about each point and the orientations of the grid difference rotation axes are given. The axes for n = 5 are directed toward the vertices of a regular dodecahedron; the axes for n= 12 are directed toward the vertices and faces of a cube. Products of two rotations of equal magnitude to give a third rotation of the same magnitude were considered and classified into conrotatory and disrotatory types. For n 〉 12 the Lattman treatment was extended to include third-order terms. Examples of Lattmanian angle grids are given and the grid spacings are compared to theoretical estimates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0567739473001014
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  • 10
    Electronic Resource
    Electronic Resource
    Transferability of nonbonded Cl...Cl potential energy function to crystalline chlorine (1985)
    [S.l.] : International Union of Crystallography (IUCr)
    Acta crystallographica 41 (1985), S. 296-301 
    Details
    ISSN: 1600-5724
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: The crystal structure of molecular chlorine could not be accurately predicted using a transferred nonbonded Cl...Cl potential function that was found satisfactory for prediction of perchlorohydrocarbon crystal structures. Additional consideration of quadrupole-quadrupole interaction did not resolve this problem. One possible solution, which has been explored in the literature, was to define a new, nontransferable, Cl...Cl potential function specifically tailored to molecular chlorine. Such a specialized Cl...Cl function required additional adjustable parameters that defined an anisotropic nonbonded energy function for chlorine. A second possible approach, explored here, transferred the perchlorohydrocarbon Cl...Cl potential function to molecular chlorine. This simple isotropic nonbonded energy function was then supplemented by a partial intermolecular bonding force constant, which was applied to the short contacts present in this structure type. The resulting empirical model described the crystal structure of molecular chlorine within threshold accuracy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108767385000630
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