The 3,5-di-tert-butyl-catecholato and 9,10-phenanthrenecatecholato adducts of the cobalt-tetraazamacrocycle complex Co(Me(4)CYClaM)(2+) (Me(4)CYClam = 1, 4,8,11-tetramethyl-1,4,8, 11-tetraazacyclotetradecane) were synthesized and oxidized. The oxidation reaction products were isolated in the solid state as hexafluorophosphate derivatives. Both these complexes can be formulated as 1:1 cobalt(II)-semiquinonato complexes, that is, Co(Me(4)CYClam)(DBSQ)PF6 (1) and Co(Me(4)CYclam)(PhSQ)PF6 (2), in the temperature range 4-300 K, in striking contrast with the charge distribution found in similar adducts formed by related tetraazamacrocycles, The synthesis strategy and the structural, spectroscopic, and magnetic properties are reported and discussed, The crystallographic data for 2 are as follows: monoclinic, space group P2(1)/a, no. 14, a = 14.087(4) Angstrom, b = 15.873(4) Angstrom, c = 14.263 (7) Angstrom, alpha = 89.91(3)degrees, beta = 107.34(2)degrees, gamma = 90,08(2)degrees, Z = 4, Both these complexes are characterized by triplet electronic ground states arising from the antiferromagnetic coupling between the high-spin d(7) metal ion and the radical ligand.

ANTIFERROMAGNETIC COUPLING IN A SIX-COORDINATE HIGH SPIN COBALT(II)-SEMIQUINONATO COMPLEX / A. DEI; A. CANESCHI; D. GATTESCHI; V. TANGOULIS. - In: INORGANIC CHEMISTRY. - ISSN 0020-1669. - STAMPA. - 41(2002), pp. 3508-3512. [10.1021/ic020243n]

ANTIFERROMAGNETIC COUPLING IN A SIX-COORDINATE HIGH SPIN COBALT(II)-SEMIQUINONATO COMPLEX

DEI, ANDREA;CANESCHI, ANDREA;GATTESCHI, DANTE;
2002

Abstract

The 3,5-di-tert-butyl-catecholato and 9,10-phenanthrenecatecholato adducts of the cobalt-tetraazamacrocycle complex Co(Me(4)CYClaM)(2+) (Me(4)CYClam = 1, 4,8,11-tetramethyl-1,4,8, 11-tetraazacyclotetradecane) were synthesized and oxidized. The oxidation reaction products were isolated in the solid state as hexafluorophosphate derivatives. Both these complexes can be formulated as 1:1 cobalt(II)-semiquinonato complexes, that is, Co(Me(4)CYClam)(DBSQ)PF6 (1) and Co(Me(4)CYclam)(PhSQ)PF6 (2), in the temperature range 4-300 K, in striking contrast with the charge distribution found in similar adducts formed by related tetraazamacrocycles, The synthesis strategy and the structural, spectroscopic, and magnetic properties are reported and discussed, The crystallographic data for 2 are as follows: monoclinic, space group P2(1)/a, no. 14, a = 14.087(4) Angstrom, b = 15.873(4) Angstrom, c = 14.263 (7) Angstrom, alpha = 89.91(3)degrees, beta = 107.34(2)degrees, gamma = 90,08(2)degrees, Z = 4, Both these complexes are characterized by triplet electronic ground states arising from the antiferromagnetic coupling between the high-spin d(7) metal ion and the radical ligand.
41
3508
3512
A. DEI; A. CANESCHI; D. GATTESCHI; V. TANGOULIS
File in questo prodotto:
File Dimensione Formato  
InorgChem_2002.pdf

Accesso chiuso

Descrizione: InorgChem_2002
Tipologia: Pdf editoriale (Version of record)
Licenza: DRM non definito
Dimensione 68.43 kB
Formato Adobe PDF
68.43 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2158/5402
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 76
  • ???jsp.display-item.citation.isi??? 71
social impact