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
Citations
More filters
Journal ArticleDOI
Self-assembly of silver(I) coordination polymers with novel layered open network structures based on a flexible double betaine ligand
Xing Zhang,Guo-Cong Guo,Fa-Kun Zheng,Guo-Wei Zhou,Jiang-Gao Mao,Zhen-Chao Dong,Jin-Shun Huang,Thomas C. W. Mak +7 more
TL;DR: In this article, three coordination polymers were obtained from self-assembly of AgX (X = NO3−, BF4−, or ClO4−) with a new flexible double betaine L1 (L1======= 1,3-bis(pyridinio-4-carboxylato)propane).
Journal ArticleDOI
Intramolecular, Metallacyclic Organoaluminium, ‐gallium and ‐indium Addition Compounds Crystal Structure of 1‐Galla‐5‐azabicyclo[3.3.3]undecane
Herbert Schuman,Uwe Hartman,Wilfried Wassermann,Oliver Just,Andreas Dietrich,Ludwig Dr Pohl,Martin Hostalek,Matthias Lokai +7 more
TL;DR: In this article, four-coordinated metallacyclic organoaluminium, gallium, and indium precursors have been synthesized by the reaction of [3-(dimethylamino)propyl]aluminium dichloride with bis[3-(chloromagnesio)-propyl]-N, N,N′-dimethyl ethylenediamine.
Journal ArticleDOI
Chemistry of [Ru(tpy)(pap)(L′)n+ (tpy = 2,2′,6′,2″-terpyridine; pap = 2-(phenylazo)pyridine; L′ = Cl−, H2O, CH3CN, 4-picoline, N3−; n = 1,2). X-ray crystal structure of [Ru(tpy)(pap)(CH3CN)](ClO4)2 and catalytic oxidation of water to dioxygen by [Ru(tpy)(pap)(H2O)]2+
TL;DR: In this article, the perchlorate salt was characterized as perchlorates and the structure determination of [Ru(tpy)(pap) (CH3CN)](ClO4)2 by X-ray crystallography showed that tpy is coordinated to ruthenium in the usual meridional fashion and the pap ligand is bound to rutanium with the azo-nitrogen trans to CH3CN.
Journal ArticleDOI
Crystal structures of subtilisin BPN' variants containing disulfide bonds and cavities: concerted structural rearrangements induced by mutagenesis.
TL;DR: The X‐ray structure of four genetically engineered disulfides variants of subtilisin have been analyzed to determine the energetic and structural constraints involved in inserting disulfide bonds into proteins, and systematic long‐range effects were indicated.
Journal ArticleDOI
Syntheses and crystal structures of five two-dimensional networks constructed from staircase-like silver(I) thiocyanate chains and bridging polyamines
TL;DR: In this paper, five co-ordination polymers 2∞[(AgSCN)2L] (L = N,N,N′-bis(3-aminopropyl)ethylenediamine) have been synthesized and structurally characterized by single-crystal X-ray diffraction.
References
More filters
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.