Synthesis and structural studies of hydrazino-crown ethers and thermodynamic studies of their interaction with transition, and post-transition metal ions and methyl ammonium ion

Autor:	Geng Wu, D. Wade Walke, Jerald S. Bradshaw, Weiming Jiang, Reed M. Izatt, Krzysztof E. Krakowiak, N. Kent Dalley
Rok vydání:	1990
Předmět:	chemistry.chemical_classification Cation binding Hydrogen Ligand Hydrogen bond Inorganic chemistry chemistry.chemical_element General Chemistry Condensed Matter Physics Metal Solvent chemistry visual_art Polymer chemistry visual_art.visual_art_medium Molecule Crown ether Food Science
Zdroj:	Journal of Inclusion Phenomena and Molecular Recognition in Chemistry. 8:299-308
ISSN:	1573-1111 0923-0750
DOI:	10.1007/bf01041886
Popis:	Hydrazino-crown ethers have been synthesized in only 3 or 4 steps starting from 1,2-diacetylhydrazine. The X-ray crystal structure of protonated hydrazino-19-crown-7 (2) showed that one of the hydrazino nitrogen atoms was directed outside the ring cavity. A solvent methanol molecule is held in the cavity of the host ligand by three hydrogen bonds involving two hydrogen atoms bonded to nitrogens of the ligand and the alcohol hydrogen of the methanol. The logK values for the interaction of2 with CH3NH + 3 , Ag+, Pb2+, and Cd2+ were much less than those for the interaction of symmetrical triaza-l8-crown-6 (5) with the same cations. Hydrazino-crown2 reduced silver ions to silver metal when a solution of2 and silver ions in DMSO was allowed to stand for several days.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::bc603f5c451f392d5099a5c8b0fe9463 https://doi.org/10.1007/bf01041886 Zobrazit plný text záznamu Full text from SpringerLink