By Dr. Edwin Weber, Prof. Dr. Fritz Vögtle (auth.), Professor Dr. Fritz Vögtle, Dr. Edwin Weber (eds.)
The clinical and functional curiosity in coronands (crown ethers), cryptands, podands as complexing brokers for cations in addition to for anions and impartial low molecular species is indisputable 1,2). The chemistry of crown compounds is gradually expanding. approximately 250 unique papers facing crown chemistry seemed simply in 1980. New molecules· with crown ether homes are continuously synthesized and new functions discov,?red. due to loss of house, just a small variety of the unique courses is males tioned right here. therefore, within the literature compilation just some, yet proper works are chosen for every bankruptcy. every time attainable, reference is made to studies or review-like articles by myself via which origin,al works will be consulted. The experiences given less than ref. 1) are thought of to be the main proper. The formulae offered within the figures could be understood as consultant constructions outlining a selected box. 2 type of Oligo-/Multidentate impartial Ligands and in their Complexes this day, a contrast is made among the classical ring oligoethers (crown ethers) and monocyclic coronands, oligocyclic round cryptands and the acyclic podands with admire to topological features 3). This category and the topology are illustrated in Fig. 1, each one determine representing the minimal variety of donor atoms and chain segments attribute of every classification of compounds. Multidentate mono cyclic ligands with any form of donor atoms are referred to as coronands ("crown compounds"), whereas the time period crown ether could be reserved for cyclic oligoethers solely containing oxygen as donor atom.
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