FORMATION OF MONO-NUCLEAR AND DI-NUCLEAR COMPLEXES OF ZN2-DISUBSTITUTED PYRAZOLE ABLE TO ACT AS NEUTRAL AND DIANIONIC LIGAND( FROM A 26 MEMBERED TETRAESTER CROWN OF 3,5)

Authors
ACERETE C BUENO JM CAMPAYO L NAVARRO P RODRIQUEZFRANCO MI SAMAT A
Citation
C. Acerete et al., FORMATION OF MONO-NUCLEAR AND DI-NUCLEAR COMPLEXES OF ZN2-DISUBSTITUTED PYRAZOLE ABLE TO ACT AS NEUTRAL AND DIANIONIC LIGAND( FROM A 26 MEMBERED TETRAESTER CROWN OF 3,5), Tetrahedron, 50(16), 1994, pp. 4765-4774
Citations number
21
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Tetrahedron → ACNP
ISSN journal
00404020
Volume
50
Issue
16
Year of publication
1994
Pages
4765 - 4774
Database
ISI
SICI code
0040-4020(1994)50:16<4765:FOMADC>2.0.ZU;2-O
Abstract
A selective synthesis of bis(3,5-diketo-1H-pyrazole)-26crown-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 dipyrazol ate salt of 1(2,L(2)(2-)2Na(+)) has been isolated, and mono- and di- nuclear complexes of Zn2+ obtained from 1 (L(1)Zn(2+)) and 2 (L(2) Zn(2)(2+)) have been studied by C-13 NMR spectroscopy in DMSO-d(6) so lution.