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.
Results
Showing 1 to 20 of 242 for “"Olefins"”.
-
ORGANOCATALYTIC HALOFUNCTIONALIZATION OF OLEFINS
Enantioselective halocyclization reactions are important for the synthesis of chiral heterocyclic compounds. In the first part of this thesis, a catalytic enantioselective bromocyclization of olefinic amides has been developed. The resulting enantioenriched 2-substituted 3-bromopiperidines can …
-
Oligomerization of higher olefins
A series of new substituted cyclopentadienyl ligands and their chromium complexes were successfully synthesised and characterised using a wide range of analytical and spectroscopic techniques such as NMR, mass spectrometry, elemental analysis and melting points.The ligands were then tested for the …
-
Olefins from amine oxides
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Chemistry, 1957
-
Stereoselective Synthesis of Trisubstituted Olefins
… stereoselective synthesis of trisubstituted olefins is presented. The method involves the stereoselective construction of various $\beta$-hydroxy phosphonamidates followed by their thermolysis to provide trisubstituted olefins in extremely high geometrical purity ($>$99/1).
-
Asymmetric catalytic epoxidations of simple olefins
Two types of chiral (salen)Mn(III) complexes, either cationic or neutral, were synthesized by complexation of the corresponding chiral salen ligands with manganese salt. Neutral Mn(III) salen complexes were prepared from the ligands and $\rm Mn(OAc)\sb2{\cdot}4H\sb2O$ via in situ aerial oxidation …
-
Oxidative Heck Reactions with Terminal Olefins
… used to generate branched allylic esters from α-olefins with only the addition of an aryl boronic acid to the reaction mixture. Styrenyl allylic esters are generated in good overall yield and excellent selectivities. The wide functional group tolerance and mild conditions of this three-component …
-
The Ring-opening Polymerisations of Cyclic Olefins
The ring opening polymerisations of cyclic olefins were investigated using a catalyst system of tungsten hexachloride and aluminium tri-isobutyl. The cyclic olefins investigated were cyclooctene and cyclopentene. The monomers were purified and attempts were made to remove conjugated dienes that …
-
Studies of the sulphation of a-olefins
… suitable for studying the sulphation of a-Olefins by concentrated sulphuric acid was designed and constructed and its flow characteristics, power consumption and reactor kinetics investigated...
-
Reactions of phenyl(trihalomethyl)mercurials with olefins
Thesis: M.S., Massachusetts Institute of Technology, Department of Chemistry, 1964
-
The Study of the Sulphation of [alpha]-olefins
The sulphation of hexadecene, in concentrated sulphuric acid (98% w/w), has been investigated in a votator scraped-surface heat exchanger reactor with "no-leak". The reactor flow pattern (tangential and axial) has been investigated and the theoretical tangential flow velocity profile determined …
-
New Methods for the Stereoselective Synthesis of Olefins
Made available in DSpace on 2014-12-10T23:01:44Z (GMT). No. of bitstreams: 1 7412082.pdf: 4063012 bytes, checksum: 607c326a410c5a3da487b28ad2f73993 (MD5) Previous issue date: 1973
-
Studies on the Stereospecific Synthesis of Trisubstituted Olefins
Made available in DSpace on 2014-12-10T23:01:46Z (GMT). No. of bitstreams: 1 7412113.pdf: 2628191 bytes, checksum: dda504b7a7be7e1562b8692daed36af3 (MD5) Previous issue date: 1973
-
Asymmetric hydrogenation of unfunctionalized trisubstituted and tetrasubstituted olefins
… asymmetric hydrogenation of aryl trisubstituted olefins was generated by combining the complex (EBTHI)MMe2 (EBTHI = ethylenebistetrahydroindenyl, M = Ti, Zr) with [PhMe2NH]+[(BC6F5)4]- under a hydrogen atmosphere. A number of unfunctionalized trisubstituted olefins could be hydrogenated rapidly …
-
Highly Efficient Catalysts for the Dimerization of α-Olefins
… of my work was the catalytic dimerization of a-olefins, especially the dimerization of propylene. The focus was laid on the optimization of product selectivity, catalyst lifetime, and product separation. Previous studies in our group have shown the enormous potential of bis(imino)pyridin …
Page 1 of 13