• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 4871
  • 1479
  • 686
  • 321
  • 181
  • 162
  • 148
  • 148
  • 148
  • 148
  • 148
  • 146
  • 83
  • 74
  • 37
  • Tagged with
  • 9789
  • 2030
  • 1440
  • 1325
  • 1105
  • 604
  • 585
  • 575
  • 500
  • 490
  • 463
  • 386
  • 375
  • 369
  • 352
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
91

Organic derivaties of arsenic, antimony and bismuth. Part I. Distibyls.--Tetraphenyldistibyl. Attempts to obtain tetraphenyldibismuthyl. Tetra-p-bromotetrapheny- and tetra-p-tolyldistibyl. Di-alpha-naphthyliodostibine. Part II. The interaction of diarylarsyl iodides, diarylstibyl iodides and phenyldihaloarsines with the piperidine salt of N-pentamethylenedithiocarbamic acid ...

Oakdale, Urban Oscar, January 1933 (has links)
Thesis (PH. D.)--University of Michigan, 1929.
92

Analysis of organic and inorganic arsenicals in biological material

Norin, Harald. January 1983 (has links)
Thesis (Doctoral)--University of Stockholm, 1983. / Added t.p. laid in. Includes papers on which the thesis is based. Includes bibliographical references.
93

The preparation and characterization of several hexaaza macrocyclic compounds of cobalt(II), nickel(II), and copper(II)

Myers, Frederick Felder, January 1975 (has links)
Thesis--University of Florida. / Description based on print version record. Typescript. Vita. Includes bibliographical references (leaves 111-115).
94

Carbenes and carbenoids as powerful tools in organic synthesis

Frankowski, Kevin J. January 2006 (has links)
Thesis (Ph.D.)--University of Delaware, 2006. / Principal faculty advisor: Douglass F. Taber, Dept. of Chemistry and Biochemistry. Includes bibliographical references.
95

1-Bromo-1-lithioethene as a building block for organic synthesis

Novikov, Yehor. January 2005 (has links)
Thesis (Ph.D.)--Kent State University, 2005. / Title from PDF t.p. (viewed July 25, 2006). Advisor: Paul Sampson. Keywords: organolithiums, Felkin-Anh diastereoselectivity, low temperatures, cryogenic reactor, carbohydrates, building blocks. Includes bibliographical references (p. 186-197).
96

Non-covalent weak interactions in group IV, PT(II) and AU(I) organometallic complexes synthesis, structures and properties /

Kui, Chi-fai. January 2005 (has links)
Thesis (Ph. D.)--University of Hong Kong, 2005. / Title proper from title frame. Also available in printed format.
97

A study of the structural, microstructural and magnetic properties of iron-platinum and cobalt-platinum type nanoparticles

Wang, Hongli. January 2007 (has links)
Thesis (Ph.D.)--University of Delaware, 2007. / Principal faculty advisor: George C. Hadjipanayis, Dept. of Physics & Astronomy. Includes bibliographical references.
98

Synthesis, characterization and reactivity of organic bismuth compounds

Kou, Xiaodi. January 2007 (has links) (PDF)
Thesis (Ph.D.)--Texas Christian University, 2007. / Title from dissertation title page (viewed Jul. 31, 2007). Includes abstract. Includes bibliographical references.
99

Structure and properties of self-assembled coordination compounds : homoleptic d10-metal aryl/alkylacetylides, ruthenium n-heterocycles and picolinates /

Ng, Fei-yeung. January 2006 (has links)
Thesis (Ph. D.)--University of Hong Kong, 2006. / Also available online.
100

Formation and reactions of ipso adducts from chlorination of 2-methyl-2-aryloxypropanoic acids

Ji, Ruizhi 20 June 2018 (has links)
Chlorination of 2-methyl-2-aryloxypropanoic acids with aqueous hypochlorous acid gives spiro chloro adducts in moderate to high yields. In chlorination of 2-methyl-2-(2-methylphenoxy)propanoic acids, 1,2-adducts are formed, while in the case of 2-methyl-2-(4-methylphenoxy)propanoic acids, 1,4-adducts are obtained. In addition to the spiro adducts, 2-methyl-2-(4-chlorophenoxy)propanoic acids in the former case, and 2-methyl-2-(2-chlorophenoxy)propanoic acids in the latter case are formed, respectively. No 6-chlorosubstituted products are detected on chlorination of any of the substrates. Chlorination of 2-methyl-2-(2,4-dimethylphenoxy)propanoic acid affords only the 1,4-adduct. However, chlorination of 2-methyl-2-(5-chloro-2,4-dimethylphenoxy)propanoic acid gives both the 1,2- and the 1,4-adduct. 2-Methyl-2-(3,5-di-t-butylphenoxyl)propanoic acid on chlorination yields the diastereomeric secondary chloro adduct, 8-chloro-7,9-di-t-butyl-3,3-dimethyl-1,4-dioxaspiro (4,5) deca-6,9-dien-2-one. Under neutral and non-polar conditions, most of the 1,2-adducts undergo a thermal rearrangement of the chlorine which is shown to be a (1,5) sigmatropic chlorine shift. The rearrangement rates are highly dependent on the nature of the substituents in the diene systems. Under acidic and non-nucleophilic conditions, most of the 1,4-adducts undergo an intramolecular 1,2 chlorine shift followed by aromatization to give the 3-chloro-substituted products. For the dienes in which the 3-position is originally substituted, successive 1,2 chlorine migrations and/or side chain substitution are observed. On the other hand, the 1,2-adducts under similar reaction conditions undergo an intermolecular 1,4 chlorine shift to give the 5-chlorosubstituted products. In the case that the 5-position is substituted by a methyl group, side chain substitution at the 5-methyl takes place. In the presence of added base, solvolyses of the 1,4-adducts in methanol affords simple solvolysis products and/or 1,2 carboxyl rearranged products. The kinetic studies of the solvolyses of the 1,4-adducts have been carried out. The results reveal the substituent effects on both the simple solvolysis displacement and the rearrangement reactions. / Graduate

Page generated in 0.0383 seconds