期刊
DALTON TRANSACTIONS
卷 -, 期 17, 页码 3222-3229出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/b900118b
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资金
- Department of Science and Technology [SR/S1/IC-18/2008]
- CSIR, New Delhi, Govt. of India
- Pohang Accelerator Laboratory, Pohang [790-784]
The coordination driven self-assembly of discrete molecular triangles from a non-symmetric ambidentate linker 5-pyrimidinecarboxylate (5-pmc) and Pd(II)/Pt(II) based 90 acceptors is presented. Despite the possibility of formation of a mixture of isomeric macrocycles (linkage isomers) due to different connectivity of the ambidentate linker, formation of a single and symmetrical linkage isomer in both the cases is an interesting observation. Moreover, the reported macrocycles represent the first example of discrete metallamacrocycles of bridging 5-pmc. While solution composition in both the cases was characterised by multinuclear NMR study and electrospray ionization mass spectrometry (ESI-MS), the identity of the assemblies in the solid state was established by X-ray single crystals structure analysis. Variable temperature NMR study clearly ruled out the formation of any other macrocycles by [4 + 4] or [2 + 2] self-assembly of the reacting components.
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