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Dimolybdenum-containing molecular triangles and squares with diamidate linkers: structural diversity and complexity
F Albert Cotton1, Chun Y Liu, Carlos A Murillo
1Department of Chemistry and Laboratory of Molecular Structure and Bonding, P. O. Box 30012, Texas A & M University, College Station, Texas 77842-3012, USA.
Inorganic Chemistry
|March 15, 2006
Summary
Researchers synthesized novel dimolybdenum cyclic oligomers with cavities capable of selective guest molecule binding. The linker
Area of Science:
- Coordination Chemistry
- Supramolecular Chemistry
- Materials Science
Background:
- Dimolybdenum compounds offer unique electronic and structural properties.
- Cyclic oligomers with internal cavities are of interest for host-guest chemistry.
- Formamidinate ligands are versatile in stabilizing metal complexes.
Purpose of the Study:
- Synthesize and characterize novel dimolybdenum-containing cyclic oligomers.
- Investigate the influence of linker substituents on oligomer structure and assembly.
- Explore the host-guest properties of the resulting cavities.
Main Methods:
- Synthesis of dimolybdenum cyclic oligomers using cis-Mo2(DAniF)2(2+) and terephthaloyldiamidate linkers.
- Structural characterization using X-ray diffraction.
- Analysis of self-assembly and intermolecular interactions in the solid state.
Main Results:
- Four dimolybdenum cyclic oligomers with general formula [cis-Mo2(DAniF)2((ArNOC)2C6H4)2]n (n=3, 4) were synthesized.
- Oligomer size (n=3 or 4) depends on the aromatic groups of the linker.
- Compounds 2 and 3 exhibit selective host-guest behavior, forming 1D networks or cages with encapsulated solvents via C-H...F-C interactions.
Conclusions:
- The modular synthesis allows control over cyclic oligomer size and structure.
- The dimolybdenum cyclic oligomers demonstrate potential for selective molecular recognition and encapsulation.
- Intermolecular C-H...F-C interactions play a key role in solid-state self-assembly and host-guest properties.
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