Synthesis of some chromium (III) complexes and the use of these complexes as catalyst for the polymerization of alpha-olefins / Che Ibrahim bin Abdullah
A series of chromium(III) and chromium(III)-iron(III) carboxylate complexes were prepared by heating common chromium(III) and Iron(III) salts in carboxylic acids. The structure of these complexes has been confirmed by X-ray crystallography to give a trinuclear oxo-centred carboxylate. The characteri...
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| _version_ | 1831434178182250496 |
|---|---|
| author | Abdullah, Che Ibrahim |
| author_facet | Abdullah, Che Ibrahim |
| author_sort | Abdullah, Che Ibrahim |
| building | UM Library |
| collection | Institutional Repository |
| content_provider | Universiti Malaya |
| content_source | UM Student Repository |
| continent | Asia |
| country | Malaysia |
| description | A series of chromium(III) and chromium(III)-iron(III) carboxylate complexes were prepared by heating common chromium(III) and Iron(III) salts in carboxylic acids. The structure of these complexes has been confirmed by X-ray crystallography to give a trinuclear oxo-centred carboxylate. The characterization of complexes was carried out by UV-visible spectroscopy, IR spectroscopy, Thermal analysis (TGA), CHN-elemental analysis and metal content analysis. The complexes contain a triangular arrangement of metal ions connected by a central μ3-oxo atom and bridged with six carboxylate ligands. Each carboxylate anion spans two metal centres at the periphery of the [M3(μ3-O)]6+ core, while H2O ligands occupy the remaining coordination sites on each metal centre to form a coordinated H2O. The coordination around the metal centre is approximately octahedral. These complexes with combination of diethylaluminium chloride as a cocatalyst were used in the polymerization of ethylene to form a heterogeneous catalyst system. The polymerization of ethylene was performed by varying the Al/Cr molar ratio, temperature and changing the catalyst complexes. Kinetic data show that the polymerization of ethylene is a first order reaction. The polymerization of ethylene was modified by introducing SMRCV (natural rubber) into the polymerization system. The polymer produced was characterized by using ATR-IR spectroscopy, TGA, powder XRD and differential scanning calorimetric (DSC). |
| format | Thesis |
| id | my.um.stud-4882 |
| institution | Universiti Malaya |
| publishDate | 2014 |
| record_format | eprints |
| spelling | my.um.stud-48822015-03-13T06:42:57Z Synthesis of some chromium (III) complexes and the use of these complexes as catalyst for the polymerization of alpha-olefins / Che Ibrahim bin Abdullah Abdullah, Che Ibrahim Q Science (General) QD Chemistry A series of chromium(III) and chromium(III)-iron(III) carboxylate complexes were prepared by heating common chromium(III) and Iron(III) salts in carboxylic acids. The structure of these complexes has been confirmed by X-ray crystallography to give a trinuclear oxo-centred carboxylate. The characterization of complexes was carried out by UV-visible spectroscopy, IR spectroscopy, Thermal analysis (TGA), CHN-elemental analysis and metal content analysis. The complexes contain a triangular arrangement of metal ions connected by a central μ3-oxo atom and bridged with six carboxylate ligands. Each carboxylate anion spans two metal centres at the periphery of the [M3(μ3-O)]6+ core, while H2O ligands occupy the remaining coordination sites on each metal centre to form a coordinated H2O. The coordination around the metal centre is approximately octahedral. These complexes with combination of diethylaluminium chloride as a cocatalyst were used in the polymerization of ethylene to form a heterogeneous catalyst system. The polymerization of ethylene was performed by varying the Al/Cr molar ratio, temperature and changing the catalyst complexes. Kinetic data show that the polymerization of ethylene is a first order reaction. The polymerization of ethylene was modified by introducing SMRCV (natural rubber) into the polymerization system. The polymer produced was characterized by using ATR-IR spectroscopy, TGA, powder XRD and differential scanning calorimetric (DSC). 2014 Thesis NonPeerReviewed application/pdf http://studentsrepo.um.edu.my/4882/14/COVER_%2D_(CHE_IBRAHIM_BIN_ABDULLAH_%2D_KIMIA_SGR).pdf application/pdf http://studentsrepo.um.edu.my/4882/15/Form%2D_Original_Literary_Work_Declaration.pdf application/pdf http://studentsrepo.um.edu.my/4882/1/1._Acknowledgement.pdf application/pdf http://studentsrepo.um.edu.my/4882/2/2._Abstract.pdf application/pdf http://studentsrepo.um.edu.my/4882/3/3._Content.pdf application/pdf http://studentsrepo.um.edu.my/4882/4/4._List_of_Table.pdf application/pdf http://studentsrepo.um.edu.my/4882/5/5._List_of_Figure.pdf application/pdf http://studentsrepo.um.edu.my/4882/6/6._List_of_Scheme.pdf application/pdf http://studentsrepo.um.edu.my/4882/7/7._List_of_Symbol_and_Abreviation.pdf application/pdf http://studentsrepo.um.edu.my/4882/8/8._Chapter_One.pdf application/pdf http://studentsrepo.um.edu.my/4882/9/9._Chapter_Two.pdf application/pdf http://studentsrepo.um.edu.my/4882/10/10._Chapter_Three.pdf application/pdf http://studentsrepo.um.edu.my/4882/11/11._Chapter_Four.pdf application/pdf http://studentsrepo.um.edu.my/4882/12/12._Chapter_Five.pdf application/pdf http://studentsrepo.um.edu.my/4882/13/13._Appendix.pdf Abdullah, Che Ibrahim (2014) Synthesis of some chromium (III) complexes and the use of these complexes as catalyst for the polymerization of alpha-olefins / Che Ibrahim bin Abdullah. Masters thesis, University of Malaya. http://studentsrepo.um.edu.my/4882/ |
| spellingShingle | Q Science (General) QD Chemistry Abdullah, Che Ibrahim Synthesis of some chromium (III) complexes and the use of these complexes as catalyst for the polymerization of alpha-olefins / Che Ibrahim bin Abdullah |
| title | Synthesis of some chromium (III) complexes and the use of these complexes as catalyst for the polymerization of alpha-olefins / Che Ibrahim bin Abdullah |
| title_full | Synthesis of some chromium (III) complexes and the use of these complexes as catalyst for the polymerization of alpha-olefins / Che Ibrahim bin Abdullah |
| title_fullStr | Synthesis of some chromium (III) complexes and the use of these complexes as catalyst for the polymerization of alpha-olefins / Che Ibrahim bin Abdullah |
| title_full_unstemmed | Synthesis of some chromium (III) complexes and the use of these complexes as catalyst for the polymerization of alpha-olefins / Che Ibrahim bin Abdullah |
| title_short | Synthesis of some chromium (III) complexes and the use of these complexes as catalyst for the polymerization of alpha-olefins / Che Ibrahim bin Abdullah |
| title_sort | synthesis of some chromium (iii) complexes and the use of these complexes as catalyst for the polymerization of alpha-olefins / che ibrahim bin abdullah |
| topic | Q Science (General) QD Chemistry |
| url | http://studentsrepo.um.edu.my/4882/14/COVER_%2D_(CHE_IBRAHIM_BIN_ABDULLAH_%2D_KIMIA_SGR).pdf http://studentsrepo.um.edu.my/4882/15/Form%2D_Original_Literary_Work_Declaration.pdf http://studentsrepo.um.edu.my/4882/1/1._Acknowledgement.pdf http://studentsrepo.um.edu.my/4882/2/2._Abstract.pdf http://studentsrepo.um.edu.my/4882/3/3._Content.pdf http://studentsrepo.um.edu.my/4882/4/4._List_of_Table.pdf http://studentsrepo.um.edu.my/4882/5/5._List_of_Figure.pdf http://studentsrepo.um.edu.my/4882/6/6._List_of_Scheme.pdf http://studentsrepo.um.edu.my/4882/7/7._List_of_Symbol_and_Abreviation.pdf http://studentsrepo.um.edu.my/4882/8/8._Chapter_One.pdf http://studentsrepo.um.edu.my/4882/9/9._Chapter_Two.pdf http://studentsrepo.um.edu.my/4882/10/10._Chapter_Three.pdf http://studentsrepo.um.edu.my/4882/11/11._Chapter_Four.pdf http://studentsrepo.um.edu.my/4882/12/12._Chapter_Five.pdf http://studentsrepo.um.edu.my/4882/13/13._Appendix.pdf http://studentsrepo.um.edu.my/4882/ |
| url_provider | http://studentsrepo.um.edu.my/ |