600 K
21 pp.
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TitleMultiheteromacrocycles that Complex Metal Ions. Sixth Progress Report, 1 May 1979-30 April 1980
Author(s)Cram, D. J.
Publication DateJanuary 15, 1980
Report NumberDOE/ER/70218-T1
Unique IdentifierACC0441
Other NumbersOSTI ID: 5130964
Research OrgUniversity of California, Los Angeles (USA). Department of Chemistry
Contract NoAT(04-3)34; AT03-76ER70218
Sponsoring OrgU.S. Department of Energy (DOE), Division of Basic Energy Sciences (BES)
Subject37 Inorganic, Organic, Physical And Analytical Chemistry; Alkali Metal Complexes; Alkaline Earth Metal Complexes; Heterocyclic Compounds; Ligands; Synthesis; Aromatics; Chloroform; Complexes; Organic Nitrogen Compounds; Organic Oxygen Compounds; Research Programs; Solvent Extraction; Chlorinated Aliphatic Hydrocarbons; Extraction; Halogenated Aliphatic Hydrocarbons; Organic Chlorine Compounds; Organic Compounds; Organic Halogen Compounds; Separation Processes
KeywordsHemispherands; Spherands
Related Web PagesDonald J. Cram, Host-Guest Chemistry, Cram's Rule of Asymmetric Induction and Carceplexes
AbstractObjective is to design synthesize, and evaluate cyclic and polycyclic host organic compounds for their abilities to complex and lipophilize guest metal ions, their complexes, and their clusters. Host organic compounds consist of strategically placed solvating, coordinating, and ion-pairing sites tied together by covalent bonds through hydrocarbon units around cavities shaped to be occupied by guest metal ions or by metal ions plus their ligands. Specificity in complexation is sought by matching the following properties of host and guest: cavity and metal ion sizes; geometric arrangements of binding sites; number of binding sites; character of binding sites; and valences. During this period, hemispherands based on an aryloxy or cyclic urea unit, spherands based on aryloxyl units only, and their complexes with alkali metals and alkaline earths were investigated. An attempt to separate {sup 6}Li and {sup 7}Li by gel permeation chromatography of lithiospherium chloride failed. (DLC)
600 K
21 pp.
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