Formation of mono- and di- nuclear complexes of Zn2+ from a 26 membered tetraester crown of 3,5-disubstituted pyrazole able to act as neutral and dianionic ligand

Autor:	Lucrecia Campayo, Jose M. Bueno, Pilar Navarro, Carmen Acerete, M. Isabel Rodríguez-Franco, André Samat
Rok vydání:	1994
Předmět:	chemistry.chemical_classification Ligand Stereochemistry Organic Chemistry Salt (chemistry) Carbon-13 NMR Pyrazole Biochemistry Dissociation constant chemistry.chemical_compound Deprotonation chemistry Drug Discovery A value Cyclophane
Zdroj:	Tetrahedron. 50:4765-4774
ISSN:	0040-4020
DOI:	10.1016/s0040-4020(01)85015-8
Popis:	A selective synthesis of bis(3,5-diketo-1H-pyrazole)-[26]crown- 12 ( 1 , L 1 ) has been performed. Its deprotonation pK a values, and those of the acyclic analogues ( 3 – 5 ) have been measured. The disodium dipyrazolate salt of 1 ( 2 , [L 2 ] 2- 2Na + ) has been isolated, and mono- and di- nuclear complexes of Zn 2+ obtained from 1 ([L 1 Zn] 2+ ) and 2 ([L 2 Zn 2 ] 2+ ) have been studied by 13 C NMR spectroscopy in DMSO-d 6 solution.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::18ebfe02749b511c20e67cf3712e47d4 https://doi.org/10.1016/s0040-4020(01)85015-8 Zobrazit plný text záznamu