Crystal and X-ray diffraction

R = CH3, CH3, CD3), which were characterized by single-crystal X-ray diffraction and NMR and IR spectroscopy These complexes are rare examples of first-row transition metal alkyl-hydrido species. ... 

Figure 4 Diagrammatic representation of single-crystal x-ray diffraction and data collection.

Perchloropolysilane (see Section 3.11.4.1.4.(ii)) was also successfully analyzed by single crystal X-ray diffraction and has an all-A conformation. The single crystal X-ray structure of the model oligomer 1,7-dichlorotetradecaphe-nylheptasilane has been reported, which revealed a helical conformation with SiSiSiSi torsion angles in the range of 154—162°.252... 

The SbBr4+Sb(0TeF5)6 -S02ClF was characterized by single crystal X-ray diffraction, and the parameters determined for the cation and anion proved to be in excellent agreement with those obtained from the crystal structure of SbBr4+Sb(OTeF5)[Pg.429]

Recently, a low-resolution model of the chromatin core particle has been derived from a combination of single-crystal X-ray diffraction and electron microscopic data (Finch et al., 1977). The particle is described as a flat cylinder 110 A in diameter and 57 A in height. A similar shape and similar dimensions were found to be consistent with the low-angle neutron scattering from core particles in solution (Pardon et al., 1977 Suau et al., 1977). Some conclusions may be drawn concerning the conformation of the DNA. Presumably, the strong 28 A periodicity apparent in the crystal data (Finch et al., 1977) corresponds to the pitch of the DNA superhelix wound about the histone core. X-Ray and spectroscopic data suggest that the DNA super-... 

Bostrom D. (1988). Experimental studies of (Ni,Mg)—and (Co,Mg)—olivine solid solutions by single crystal X-ray diffraction and solid state emf method. Ph.D. thesis. Department of Inorganic Chemistry, University of Umea, Umea, Sweden. 

Single crystal X-ray diffraction and neutron diffraction studies of a quenched sample indicated that the vacancies were not spread statistically over the structure, but were arranged in clusters (Koch/Cohen clusters) consisting of 13 vacancies and four... 

Spectroscopic (MS, NMR, IR) studies of quinoxalines were conducted . The structure and vibrational spectra of 2,3-bis(2-pyridyl)quinoxaline (bpq) and 2(A -methylpyridyl)-3-pyridylquinoxaline (meppq) useful for building blocks for dendrimers were measured by crystal X-ray diffraction and IR spectral experiments, respectively <2002JMT(589/90)301>. Those results were compared with ones calculated from the ab initio Hartee-Fock and the hybrid density functional methods. 

The IR, UV, ESR, single-crystal X-ray diffraction, and magnetic susceptibilities of [Cu(NCS)2(dmtp)2]2, Cu(NCS)2(dmtp)2 H20, the mononuclear complexes, bis(thiocyanato-A0bis(6-methyl-l,2,4-triazolo[l,5-a]pyrimidine-JV-3)copper(II), and the polynuclear pseudo-layered complexes, bis (thiocyanato-A)bis(5-methyl-l,2,4-triazolo[l,5-a]pyrimidine-iV-3) copper(II) were reported (84IC2803 89POL2313). 

The products of Eqs. (27) and (28) have been studied by single-crystal X-ray diffraction, and the skeleton core structures of the compounds 74-76 are illustrated in Figs. 11-13 (65). Surprisingly, 74 is monomeric even in the... 

The effects of damage by ion implantation on the low-temperature diffusion of dopant can also be studied by implanting Si+ or Ge+ ions into predeposited layers in Si. Recently, Servidori et al. (58) studied the influence of lattice defects induced by Si+ implantation. Using triple crystal X-ray diffraction and TEM, they confirmed (1) that below the original amorphous surface-crystal interface, interstitial dislocation loops and interstitial clusters exist and (2) that epitaxial regrowth leaves a vacancy-rich region in the surface. 

Ofloxacin was characterized by UV, vibrational, IR spectroscopies, 1H-, 13C-NMR spectrometry, X-ray powder diffraction pattern, single crystal X-ray diffraction, and mass spectrometry (09MI3). Levofloxacin formed a supramolecular complex with p-cyclodextrin at a molar ratio of 1 1, which was characterized by using UV, fluorescent spectra, DSC, and X-ray diffraction (07MI68). 

In addition to routinely used methods, such as elemental analysis, IR and UV-vis-NIR spectra, thermogravimetry-differential thermal analysis (TG-DTA), single-crystal X-ray diffraction, and gas adsorption, there are some important characterization methods for coordination polymers. 

The structure of B20H16, as determined by single crystal X-ray diffraction and shown in Fig. 47, represents that of the the only well characterized derivative of a closo-borane with more than 12 vertices. The structure may be considered as two B10H14 cages fused at the open faces, with the loss of all bridge H atoms and the loss of the terminal H atoms on the four B atoms which join the cages. This is not so... 

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