Inorganic chemistry crystallography

Gas-phase electron diffraction is the technique of choice for many special problems of molecular structure determination. However, it has not become a mass-producing technique like X-ray crystallography or the quantum chemical calculations. With the proliferation of quantum chemical calculations some of the problems, namely, the accurate determination of relatively simple organic molecules that used to be solved by gas-phase electron diffraction have moved to the realm of these calculations. There are a wealth of other problems, mainly in inorganic chemistry, that still necessitate the application of this rather demanding but instructive and amazing approach. 

The chemical bond in inorganic chemistry the bond valence model /1. David Brown. (International Union of Crystallography monographs on crystallography 12)... 

The range of inorganic chemistry includes both molecular compounds, which exist as discrete molecules, and crystals, whose structures are described by infinite lattices of regularly-ordered atoms and which are studied by crystallography and solid-state chemistry. Sec also Solid-State Chemistry. 

Madison, Wisconsin (1943) 25)E.E.Walstrom, "Optical Crystallography , Wiley, NY (1943) 26)A.F.Wells, "Structural Inorganic Chemistry , Clarendon Press, Oxford (1945) 27)C-... 

In 1964 I embarked on my chemistry studies. Apparently the subjects inorganic chemistry and crystallography had most appeal for me during my education, because some years later I became interested in geology and mineralogy as a hobby. The earlier mentioned specialities stood me in good stead here (or were they the cause of my interest ) and my hobby developed into a large collection of silicate minerals. 

T. Yu. Mikhailova (579), NS Kumakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninskii pr. 31, 119991 Moscow, Russia V. S. Mironov (599), Institute of Crystallography, Russian Academy of Sciences, Leninskii prosp. 59, 117333 Moscow, Russia... 

I. D. Brown, The Chemical Bond in Inorganic Chemistry. The Bond Valence Model , International Union of Crystallography, Oxford University Press, Oxford, 2002. 

Spectroscopic methods are usually not sufficient to provide decisive structural information. Consequently, the ability to establish atomic arrangements rapidly by X-ray crystallography has been of paramount importance in the development of S-N chemistry see Diffraction Methods in Inorganic Chemistry). X-Ray crystallography also provides the details of intermolecular interactions in the solid state, which are important for nnderstanding the physical properties, for example, condnctivity and magnetic behavior of S N compounds with extended stmctures. 

The usefulness of NQR spectroscopy is thus not confined to the study of weak secondary bonds, but can be apphed to ordinary covalent or coordinate covalent bonding as well. Hopefiilly with the advent of modem pulse-FT NQR methods, easier stmctural determination by X-ray crystallography, and more powerful computational methods to handle the many bonds in complex ions, NQR can resume its contribution in this area of inorganic chemistry as well. 

Figure 2.12 The ORTEP diagram of [Yb(TFPP)(L )(H20)] with 40% thermal ellipsoid probability. All hydrogen atoms are omitted for clarity [69]. (Reprinted from Inorganic Chemistry Communications, 11, H. He, A.G. Sykes, D. Galipeau, S.W. Ng and M. Ropp, Crystallography and photoluminescence properties of fS-diketonate monoporphyrinate ytterbium(III) complexes, 1051-1053, 2008, with permission from Elsevier.)...

He, H., Sykes, A.G, Galipeau, D., et al. (2008) Crystallography and photoluminescence properties of p-diketonate monoporphyrinate ytterbium(lll) complexes. Inorganic Chemistry Communications, 11, 1051-1053. 

There were also important institutional collaborations with (1) the Labora-toire de Chimie du Solide, Universite de Bordeaux I, via the then director, Paul Hagenmuller, (2) the Department of Inorganic Chemistry, Institute Jozef Stefan, Ljubljana, Slovenia, with the personal involvement of its head, Boris Zemva, (3) the Chemical Crystallography Department, The University of Oxford, via Dr. A. K. Cheetham and his student A. P. Wilkinson (D.Phil., 1991), and with the Physics Department, UCB, at the instigation of the late Dr. Melvin Klein, and his student A. S. Robertson (Ph.D., 1979), and via Professor A. Zettl, and his student C. Piskoti (Ph.D., 2000). 

Helvetica Chimica Acta International Geological Congress International Mineralogical Association Inorganic Chemistry Journal of Alloys and Compounds Journal of the American Chemical Society Journal of Applied Chemistry Journal of Applied Crystallography Journal of Applied Physics... 

Ebsworth, E.A.V., Rankin, D.W.H. and Cradock, S. (1987) Structural Methods in Inorganic Chemistry, Blackwell, Oxford. An older, but still valid, account that may help reveal the mysteries of crystallography and three-dimensional structure determination of complexes. 

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