Journal ArticleDOI
A semi-empirical method of absorption correction
TLDR
An extension of Furnas's method is described in this paper, where the variation of intensity of an axial reflection as the crystal is rotated about the goniometer axis is used to give a curve of relative transmission T against azimuthal angle ϕ for the corresponding reciprocal lattice level.Abstract:
An extension of Furnas's method is described. The variation of intensity of an axial reflection as the crystal is rotated about the goniometer axis is used to give a curve of relative transmission T against azimuthal angle ϕ for the corresponding reciprocal lattice level. Transmission coefficients for any general reflexion hkl are then given approximately by T(hkl) = [T(ϕinc) + T(ϕret)]/2 where ϕinc and ϕret are the azimuthal angles of the incident and reflected beams. Equations are derived for (ϕinc and ϕret and the accuracy of the method is discussed.read more
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The Crystal and Molecular Structure of Chloro-α,β,γ,δ-tetraphenylporphinatocobalt(III)
TL;DR: The structure of the title compound, C44H28N4CoCl, has been determined by single-crystal X-ray diffraction as discussed by the authors, with a=b=13.693(2), c=9.701(2) A, and Z=2.149 (6) A.
Journal ArticleDOI
Synthesis and characterisation of new polynuclear copper(I) pyrazolate complexes and their catalytic activity in the cyclopropanation of olefins
TL;DR: The reaction of [Cu(CH3CN)4]-BF4 with racemic pyrazole-3,5-dicarboxylic acid di-sec-butyl ester (3, 5-Dicarbo-sec)-butoxypyrazole, Hdcsbpz) or with pyrazoles-3-5-di-ter-butyric (3.5-DI-terbutyl) (3
Journal ArticleDOI
One-Dimensional Coordination Polymers of Silver(I) with Aminomethylpyridines. Example of a Triple Helical Infinite Chain
TL;DR: In this paper, the crystal structures of the three isomeric compounds Ag(2-amp)ClO4 (1), Ag(3-amp), ClO4(2), and Ag(4-amp, 3)-O4 were revealed, which reveal different packing arrangements of one-dimensional infinite chain coordination polymers.
Journal ArticleDOI
Toward a novel metal-based chemotherapy against tropical diseases. 6. Synthesis and characterization of new copper(II) and gold(I) clotrimazole and ketoconazole complexes and evaluation of their activity against Trypanosoma cruzi.
Maribel Navarro,Efrén J. Cisneros-Fajardo,Teresa E. Lehmann,Roberto A. Sánchez-Delgado,Reinaldo Atencio,Pedro Silva,Renee Lira,Julio A. Urbina +7 more
TL;DR: In this article, a number of gold complexes were synthesized by reaction of AuClPPh 3, with KPF 6 and CTZ or KTZ in acetonitrile at different ligand to metal molar ratios.
Journal ArticleDOI
Crystal structure at 2.6 A resolution of the complex of subtilisin BPN' with streptomyces subtilisin inhibitor.
TL;DR: Steric homology of the two contact regions between the inhibitors of the SSI family and the pancreatic secretory trypsin inhibitor-ovomucoid inhibitor family is so high that it seems to indicate divergent evolutionary processes and to support the general notion as to the relationship of prokaryotic and eukaryotic genes put forward by Doolittle (1978).
References
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Book
International tables for X-ray crystallography
Norman Fordyce McKerron Henry,Lonsdale, Kathleen, Dame,John S. Kasper,Caroline H. MacGillavry,Gerard D. Rieck,James A. Ibers,Walter C. Hamilton +6 more
ReportDOI
A fortran program for calculating single crystal absorption corrections
D.J. Wehe,W.R. Busing,H.A. Levy +2 more
TL;DR: A Fortran program is described for calculating the absorption correction for application to single crystal x ray or neutron intensity measurements and is available in the form of symbolic punched cards.