Global ETD Search

461	Electrophilic trapping of enolates in tandem reaction processes and (1,3-diketonato)metal templates for asymmetric catalysis Bocknack, Brian Matthew 28 August 2008 (has links) Not available / text Catalysis Asymmetric synthesis Organic compounds--Synthesis
462	Transition metal and organo-catalyzed cyclizations, cycloadditions and couplings Cauble, David Frederic 28 August 2008 (has links) Not available / text Organic compounds--Synthesis Ring formation (Chemistry)
463	Enones and enals as latent enolates in catalytic C-C bond forming processes: total synthesis of (-)-paroxetine (Paxil®) Koech, Phillip Kimaiyo 28 August 2008 (has links) Not available / text Catalysis Asymmetric synthesis Organic compounds--Synthesis Antidepressants
464	ESTIMATION OF THE MELTING POINT OF RIGID ORGANIC COMPOUNDS (COSOLVENT, NAPHTHALENE). ABRAMOWITZ, ROBERT. January 1986 (has links) The melting points of rigid, hydrogen bonding, and non-hydrogen bonding organic compounds have been estimated from their chemical structure. The estimation was accomplished through the use of both additive and non-additive non-constitutive properties of the molecule. The melting points of the aforementioned compounds can be estimated by the equation: TM = TMPN + TIHBN + TPACK + 8.9EXPAN + 73.1SIGMAL + 196.3 where the dependent variable, TM, is the melting point of the compound in Kelvin, SIGMAL is the logarithm of the symmetry number for the molecule, EXPAN is the eccentricity of the molecule taken to the third power, TMPN is the summation of the melting point number for each functional group in the molecule, TIHBN is the summation of an intramolecular hydrogen bonding index and TPACK is a packing efficiency index. The solubility of naphthalene in binary, ternary, and quinary cosolvent-water mixtures was determined by HPLC analysis. The samples were equilibrated for 48 hours on a test tube rotator, centrifuged, diluted with acetonitrile, and then injected onto a C8 10 micron column. The cosolvent mixtures used were hydro-organic solutions consisting of water with either methanol, ethanol, isopropanol, acetone, acetonitrile, propylene glycol or a combination of these as the cosolvent. The propylene glycol-water mixtures were allowed to equilibrate for 10 days. In all cases, naphthalene solubilities in binary cosolvent mixtures were found to obey log-linear relationships: log X = SIGMA(FRAC) - log X(w) where X is the mole fraction solubility of naphthalene in the mixture, X(w) is the mole fraction solubility in pure water, FRAC is the volume fraction of the cosolvent, and SIGMA is the slope. SIGMA can be estimated by using the UNIFAC method to predict the solubility in 100% cosolvent and by using the generalized solubility equation of Yalkowsky to estimate the water solubility. These binary equations can then be used to generate ternary and higher multicomponent equations. Organic compounds -- Analysis. Melting points. Chemical structure.
465	Enones and enals as latent enolates in catalytic C-C bond forming processes : total synthesis of (-)-paroxetine (Paxil®) Koech, Phillip Kimaiyo, 1974- 24 August 2011 (has links) Not available / text Catalysis Asymmetric synthesis Organic compounds--Synthesis Antidepressants
466	The synthesis and reactions of 3H-pyrroles bearing methyl and aryl groups 楊小雯, Yeung, Siu-man. January 1991 (has links) published_or_final_version / Chemistry / Master / Master of Philosophy Pyrrole. Organic compounds - Synthesis. Chemical reactions.
467	The first synthesis and structure of diazatetrathiafulvalenes and somespectroscopic and cyclic voltammetric measurements 朱淑玲, Chu, Suk-ling. January 1993 (has links) published_or_final_version / Chemistry / Master / Master of Philosophy Intermediates (Chemistry) Voltammetry. Organic compounds - Synthesis.
468	Isolation of hydroxypyrrolines in the Paal-Knorr reaction; and the synthesis and properties of 3H-phrroles carrying an ester or nitrilegroup at C-3 趙百勤, Chiu, Pak-kan. January 1988 (has links) published_or_final_version / Chemistry / Doctoral / Doctor of Philosophy Pyrrole. Organic compounds - Synthesis. Chemical reactions.
469	Development of acillary techniques for chromatographic analysis of trace organic pollutants in environmental samples 吳祖成, Wu, Zucheng. January 1995 (has links) published_or_final_version / Chemistry / Doctoral / Doctor of Philosophy Volatile organic compounds - Analysis. Chromatographic analysis.
470	SYNTHESIS AND REARRANGEMENTS OF PENTADIENYL AND HEPTATRIENYL CARBANIONS McCombs, Douglas Arthur, 1942- January 1969 (has links) No description available. Organolithium compounds. Organic compounds -- Synthesis. Coordination compounds.

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