Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Structural effects of potentially hexadentate N4O2, N4S2 or N-6 ligands involving pyridine, amine and ether or thioether donors: crystal structure ofcopper(II) and zinc(II) complexes
Autore:
Jubert, C; Mohamadou, A; Marrot, J; Barbier, JP;
Indirizzi:
Univ Reims Champagne Ardenne, Fac Sci, GRECI, F-51687 Reims 2, France UnivReims Champagne Ardenne Reims France 2 ECI, F-51687 Reims 2, France Univ Versailles, Inst Lavoisier, IREM, UMR C8637,CNRS, F-78035 Versailles,France Univ Versailles Versailles France F-78035 NRS, F-78035 Versailles,France
Titolo Testata:
JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS
fascicolo: 8, , anno: 2001,
pagine: 1230 - 1238
SICI:
1472-7773(2001):8<1230:SEOPHN>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
STABILITY-CONSTANTS; CARBONIC-ANHYDRASE; AROMATIC NITROGEN; REDOX POTENTIALS; ESCHERICHIA-COLI; RESOLUTION; PROTEASE; BINDING; AZURIN; SITE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
72
Recensione:
Indirizzi per estratti:
Indirizzo: Mohamadou, A Univ Reims Champagne Ardenne, Fac Sci, GRECI, BP 1039, F-51687 Reims 2, France Univ Reims Champagne Ardenne BP 1039 Reims France 2 , France
Citazione:
C. Jubert et al., "Structural effects of potentially hexadentate N4O2, N4S2 or N-6 ligands involving pyridine, amine and ether or thioether donors: crystal structure ofcopper(II) and zinc(II) complexes", J CHEM S DA, (8), 2001, pp. 1230-1238

Abstract

The two new hexadentate ligands 1,12-bis(2-pyridyl)-5,8-dioxa-2,11-diazadodecane (pydado) and 1,12-bis(2-pyridyl)-5,8-dithia-2,11-diazadodecane (pydadt), have been synthesized as their tetrahydrochloride salts and their protonation constants and the stability constants of the copper(II) and zinc(II) chelates determined by potentiometry. The formation of M(HL) and ML species was detected in all cases except for pydado which gives only ZnL species. The two central donor atoms (ether oxygen or thioether sulfur) of the ligands do not have a great influence on the protonation constants, but the stability constants of copper(II) complexes with pydadt are slightly greater than those of pydado. The solid copper(II) and zinc(II) complexes have beenprepared as their perchlorate salts. The crystal structures of four complexes are reported. In all the zinc(II) complexes the metal center is encapsulated by the ligand in a distorted octahedral environment, whereas the copper(II) complex with pydado is a four-coordinated compound. The copper(II) complexes have been examined by ESR, electronic spectroscopy and cyclic voltammetry to show the effects of the two central donor atoms on the structureand properties.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/03/20 alle ore 00:49:51