This dissertation consists of two independent topics: (1) a molecular loop with
interstitial channels in a chiral environment; (2) study of formation of metal-metal bonds
in dinickel, dipalladium and dititanium complexes
On the first topic, a study of the reaction products of the interaction of cis-
Mo2(DAniF)2(CH3CN)4
2+ corner pieces with ortho-, meta- and para- isomers of
enatiomerically pure ÂO2CCH(CH3)C6H4CH(CH3)CO2
 dicarboxylate was performed.
First, an enantiomerically pure molecular loop based on two dimolybdenum units and
two para-dic arboxylate linkers was synthesized and structurally characterized. Similar
reactions with isomeric ortho- and meta- dicarboxylate linkers, as well as with some
nonchiral ligands, showed that the structure of the obtained products depends on the
geometry of the ligand. Meta- dicarboxylate linker favors the formation of the chelated
product and ortho- dicarboxylate linker produces the mixture of chelated molecules and
loops. On the second topic, an investigation of the formation of metal-metal bonds was
performed. Study of the one-electron bond obtained upon oxidation of Ni2
4+ and Pd2
4+ to
Ni2
5+ and Pd2
5+, respectively, was made. The compounds synthesized were studied with
various physical methods, such as X-ray crystallography, UV-visible spectroscopy and
EPR spectroscopy. The nature of oxidized species as well as the dependence of metalmetal
interactions on electron-donating abilities of bridging ligands was studied. It was
shown that oxidation takes place on a metal center. The formation of one-electron bond
in oxidized species is proposed.
Finally formation of Ti2
6+ single bonded compounds by the reduction of two Ti4+
monomers to Ti2
6+ dimer was studied. The nature of the species obtained in solution and
in solid state is discussed. The crystal structure shows the presence of two types of hpp
ligands  chelating and bridging. NMR study of this compound in solution proposes the
rearrangement of this structure to a paddlewheel.
| Identifer | oai:union.ndltd.org:tamu.edu/oai:repository.tamu.edu:1969.1/3760 |
| Date | 16 August 2006 |
| Creators | Ibragimov, Sergey |
| Contributors | Cotton, F. A. |
| Publisher | Texas A&M University |
| Source Sets | Texas A and M University |
| Language | en_US |
| Detected Language | English |
| Type | Book, Thesis, Electronic Dissertation, text |
| Format | 4370490 bytes, electronic, application/pdf, born digital |
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