Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 11 of 11 for “"X-ray structure analysis"”.
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Structural studies of polynuclear metal carbonyl derivatives
X-Ray structure analysis of fifteen metal carbonyl cluster compounds of nuclearity three to seven have been carried out to investigate the effect organo-fragments have on metal core geometry.
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Molecular studies of natural products and related compounds.
… thesis involves the use of direct methods of X-ray structure analysis for the structure elucidation of novel natural products and related compounds. Empirical force field calculations are also used for conformational and biosynthetic studies. An outline of the development of direct methods of …
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ΣΥΝΘΕΣΗ, ΦΑΣΜΑΤΟΣΚΟΠΙΚΗ ΚΑΙ ΚΡΥΣΤΑΛΛΟΓΡΑΦΙΚΗ ΜΕΛΕΤΗ ΤΗΣ ΔΟΜΗΣ ΚΑΙ ΘΕΩΡΗΤΙΚΑ ΜΟΝΤΕΛΑ ΣΥΜΠΛΟΚΩΝ ΤΩΝ ΣΟΥΛΦΟΝΥΛΟΥΡΙΩΝ ΜΕ D8,D9 ΚΑΙ D10 ΜΕΤΑΛΛΟΙΟ...
… WERE STUDIED AND CHARACTERIZED BY ELEMENTAL ANALYSIS, MAGNETICALLY AND SPECTROSCOPICALLY (IR SPECTRA, UV-VIS SPECTRA, EPR SPECTRA, NMR SPECTRA, MASS SPECTRA), THERMAL ANALYSIS, X-RAY STRUCTURE ANALYSIS, THEORETICAL CALCULATIONS OF THE MOLECULAR STRUCTURE, CONDUCTOMETRIC AND POTENTIOMETRIC …
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The synthesis and chemistry of the cyclophanenes and their metal complexes
… [3,2] (1,3) cyclophane, 72c. An X-ray structural determination of the monothiacyclophane 72a revealed an anti-stepped geometry of the molecule and that the aromatic rings were bent outward in a slightly distorted boat form. A reciprocal relationship between deviations of the inner …
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Influence of High Temperature Creep upon the Structure of ß-NiAl and ß-NiAl(Fe) Single Crystals
… the influence of high temperature creep upon the structure of ß-NiAl and ß-NiAl(Fe) single crystals. A non-destructive procedure is established following the classic line of X-ray structure analysis, namely controlling the chemical composition with the electron probe microanalysis, determining the …
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Amphiphilic Spin Crossover Complexes
… Structural investigations using single crystal X-ray structure analysis gave a detailed insight into structure-property relationship of the synthesized complexes. The mechanism of the SCO of [FeLa(C16)(py)2], a complex with the chain length of 16 carbon atoms and pyridine in axial positions was …
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Synthesis and characterisation of novel α-functionalised phosphoryl derivatives
… possible configurations, SSSS/RRRR. The crystal structure of the novel N-functionalised macrocycle shows an extended hydrogen-bonded structure in the solid state. The macrocycle has an unusual conformation with the pendant arms alternating ‘up’ and ‘down’ around the ring. The La3+ complex has a …
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Structural Characterisation of the Mammalian SRP Receptor
… SRβ effector interactions should be obtained. X-ray structure analysis was used to determine the structure of a soluble form of SRβ (SRβΔTM) in its GTP bound state in complex with a fragment of SRα. The structure allows to precisely define the minimal SRβ binding domain of SRα (SRX). The homology …
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"The New Chemistry" - Sustainable Catalysis with Alcohols
… state was identified by NMR experiments and X-ray structure analysis to be an iridium trihydride. This trihydride is formed under catalytic conditions, by treatment of the pre-catalyst with alcohols or in hydrogen atmosphere. In the final part of the work, a catalytic pyridine synthesis was …
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Group 3 and Group 13 Metal Hydride Compounds
… synthesized using H2 elimination. Mononuclear structures featuring tetrahedral coordination of the central aluminum atom were observed for the guanidinato ligand stabilized aluminum dialkyl complexes. The (Al)N-C-N(Al) bond angles in the corresponding complexes were determined using structural …
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Antimalarial benzimidazoles and related structures incorporating an intramolecular hydrogen bonding motif: medicinal chemistry and mechanistic studies
… frontrunner analogue 1.3 as a guide. A structure-activity relationship (SAR) plan was pursued to produce diverse analogues due to modifications around the core scaffold. The SAR was explored with aromatic and aliphatic groups. As a result, 19 structural variants were synthesized and …