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Showing 1 to 20 of 50 for “"Isomerism"”.
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Isomerism of Substituted Imines
Made available in DSpace on 2014-12-05T19:37:35Z (GMT). No. of bitstreams: 1 6100140.pdf: 7304946 bytes, checksum: ff93b7b01afd7ca1088bb64f3289a7cb (MD5) Previous issue date: 1960
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A reevaluation of distortional isomerism.
… are not examples of distortional isomerism. For both systems, the blue form is pure and the green form is a mixture of the blue complex and other components. Characterizations of the green material of each indicates that green "MoOCl₂(PMe₂Ph)₃" is a mixture of MoOCl₂(PMe₂Ph)₃ and …
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Optical Isomerism in the Gallium Family
Made available in DSpace on 2014-12-05T19:36:17Z (GMT). No. of bitstreams: 1 0015211.pdf: 3440283 bytes, checksum: de827630e3cfea23f47ba0d65517533b (MD5) Previous issue date: 1955
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Constitutional isomerism in liquid crystalline polyamides
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1988.
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High Pressure Studies of Triphenylmethane Dye Molecules (Photosensitization, Adsorption, Isomerism, Semiconductors, Surfaces)
… study the effect of pressure on the rotational isomerism of these dye molecules dispersed in the various media.
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The Stereochemistry of Complex Inorganic Compounds Optical-Geometric Isomerism of The Dinitro-Ethylenediamine - Isobutylenediamine - Cobalt(iii) Ion
Made available in DSpace on 2014-12-05T19:35:53Z (GMT). No. of bitstreams: 1 0009057.pdf: 3053211 bytes, checksum: d50b038811b3bf55d779bfefc7193047 (MD5) Previous issue date: 1954
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Studies in stereoselective synthesis via reissert compound chemistry
… studied by proton NMR. The two types of isomerism studied were amide isomerism and aryl / carbonyl rotation. In at least some cases, both amide isomers and restricted aryl / carbonyl rotamers were observed. For other cases only the restricted aryl / carbonyl rotamers were observed. The …
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Synthesis of Insecticidal Mono- and Diacylhydrazines for Disruption of K+ Voltage-Gated Channels, and Elucidation of Regiochemistry and Conformational Isomerism by NMR Spectroscopy and Computation
… gambiae, NMR spectroscopy revealed rotational isomerisms of two types: chiral helicity (M)/(P) and acyl (E)/(Z)-isomerism due to hindered rotation. Variable temperature NMR allowed the measurement of N-N bond rotational barriers, as well as estimate the barrier of (E)/(Z) interconversion. We …
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The Synthesis and Characterisation of Long-Chain Fatty Acids
… is applicable to the determination of positional isomerism in a complex lipid mixture and must be used in combination. Whereas NMR is undoubtedly invaluable in the quantification of positional isomers on an individual basis, or in profiling simple mixtures, it is not as applicable to the direct …
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Synthesis and reactivity of Rh and Ir imino and azidophosphonamido complexes
… The unusual ligand linkage isomerism of said species is discussed. Preliminary results pertaining to bis(cyclooctene) (COE) complexes bearing both ligand types are also reported.
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The monophosphaamidine functional group
… analogues to amidines are shown to exhibit isomerism and tautomerism in solution that is characteristic tothe amidine functional group. In addition, the nature of the P=C-N system is examined using DFT techniques. Metal complexes of the title compounds with Group 6 metal carbonyls (L-M(CO)5, …
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The Synthesis and Polymerization of N-Vinylacrylamide.
… proton pattern which was complicated by isomerism. The attempted cyclopolymerization of this monomer with azobisisobutyronitrile as initiator afforded an insoluble polymer, possibly because of the difference in reactivity of the two vinyl groups.
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Part I. Spin-state isomerism in crystalline (trifluoromethanesulfonato)(meso-tetraphenylporphinato)iron(III). Part II. Toward refined model compounds for the cytochrome c oxidase active site: A new picket-fence porphyrin with short imidazole pickets
Part I. The unsolvated porphyrin compound (Fe$\sp{\rm III}$(TPP)(OSO$\sb2$CF$\sb3$)) has been structurally characterized by single-crystal X-ray diffraction in a monoclinic phase at 293 K and in a triclinic phase at 293, 188 and 103 K. While only one type of molecular site is found in the …
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Chloromethyl and methoxymethyl transition metal complexes : an investigation into their synthesis and reactivity
… new methoxymethyl The existence of rotational isomerism in the complexes [Ru(Cp)(CO)₂CH₂ocH₃] and the previously reported [Fe(Cp)(CO)₂CH₂OCH₃],⁴⁸ is proposed on the basis of infrared data. Mass spectra of several methoxymethyl and chloromethyl transition metal complexes have been recorded.
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