, M.Sc. Thesis Sharif University of Technology Karami Golbaghi, Malihe (Author) ; Ghayemiyan, Mohsen (Supervisor)

Abstract

Supplying water has almost always been the essential need of human for agricultural, industrial and drinking water use. One of the infrastructure works to catch up to this goal is dam construction. Among all of dams, concrete gravity dams have been fortunate between designers and builders of dams, because of their acceptable function against seismic loads. So, analyzing the function and stability of dams is important in different cases. Formed crack in dam body is one of the most important parameters that affects both the function and durability of a concrete gravity dam and considering the measure of the earthquake effects on the formation and expansion of crack profiles many studies have...

Synthesis and Characterization of Tetrakis (4-sulfunatophenyl) Porphyrin-Mn(III) Chloride Complex and Study of the Catalytic Activity of the Complex in Homogeneous and Heterogeneous Catalytic Systems for Epoxidation of Olefins

, M.Sc. Thesis Sharif University of Technology Golbaghi, Golara (Author) ; Bagherzadeh, Mojtaba (Supervisor) ; Mohammadi Boghaei, Davar (Supervisor)

Abstract

Epoxidation of alkenes by Mn(III)meso-tetra(4-sulfonatophenyl)porphyrin chloride (MnTPPS4Cl) in the various homogeneous and heterogeneous catalytic systems was investigated. In the case of homogeneous catalysis, epoxidation of cyclooctene in CH2Cl2/MeOH mixture using urea hydrogen peroxide (UHP) as an oxidant and imidazole as a co-catalyst results in the formation of cycloocetene oxide in 87% yield. Using this catalytic system various alkenes successfully oxidized to their corresponding epoxide in high conversions and selectivity. Cyclic alkenes oxidized more easily than linear alkenes. In addition, epoxidation of alkenes was investigated in the heterogeneous catalytic systems. For this...

Diastereoselective synthesis and catalytic activity of two chiral cis-dioxidomolybdenum(VI) complexes

, Article European Journal of Inorganic Chemistry ; Volume 2018, Issue 22 , 15 June , 2018 , Pages 2549-2556 ; 14341948 (ISSN) Haghdoost, M. M ; Zwettler, N ; Golbaghi, G ; Belaj, F ; Bagherzadeh, M ; Schachner, J. A ; Mosch Zanetti, N. C ; Sharif University of Technology

Wiley-VCH Verlag 2018

Abstract

Two enantiomerically pure chiral dioxidomolybdenum(VI) complexes (1 and 2) of the type [MoO2L] (L = dianionic, tetradentate ONNO-ligand) were synthesized and investigated in enantioselective oxidation reactions. The solid-state structures of complex 1 and 2, determined via single-crystal X-ray diffraction analysis revealed two fundamentally different coordination geometries: a C1-symmetric cis-β isomer (Λ-1), and a C2-symmetric cis-α isomer (Δ-2). In both cases, only one of the two possible helical enantiomers (Λ- or Δ-helix) was formed. The complexes were examined as precatalysts in the epoxidation of the challenging prochiral substrate trans-stilbene, using either tert-butyl hydroperoxide...