期刊
CHEMICAL COMMUNICATIONS
卷 56, 期 35, 页码 4773-4776出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0cc01183e
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In this study imidazolium and imidazolinium centers in precursor [2]rotaxanes were deprotonated to obtain interlocked molecules featuring stabilized N-heterocyclic carbene centers. The encircling macrocyclic components enhanced the persistence of the otherwise unstable imidazolidin-2-ylidenes in solution at 253 K for more than a week in the absence of air.
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