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Titolo:
New alkyl-cobalt(III) complexes with tridentate amino-oxime ligands: Synthesis, structure, and reactivity
Autore:
Dreos, R; Felluga, A; Nardin, G; Randaccio, L; Siega, P; Tauzher, G;
Indirizzi:
Univ Trieste, Dipartimento Sci Chim, I-34127 Trieste, Italy Univ Trieste Trieste Italy I-34127 ento Sci Chim, I-34127 Trieste, Italy
Titolo Testata:
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
fascicolo: 1, , anno: 2001,
pagine: 267 - 276
SICI:
1434-1948(200101):1<267:NACWTA>2.0.ZU;2-8
Fonte:
ISI
Lingua:
ENG
Soggetto:
FT-RAMAN SPECTROSCOPY; C BOND-CLEAVAGE; ORGANOCOBALT COMPLEXES; B-12 MODELS; CRYSTAL-STRUCTURE; IMINO-OXIME; CHEMICAL PRECEDENT; AXIAL LIGAND; COENZYME; COBALT;
Keywords:
cobalt; tridentate ligands; alkylations; vitamins; N ligands;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
41
Recensione:
Indirizzi per estratti:
Indirizzo: Randaccio, L Univ Trieste, Dipartimento Sci Chim, Via L Giorgieri 2, I-34127 Trieste, Italy Univ Trieste Via L Giorgieri 2 Trieste Italy I-34127 , Italy
Citazione:
R. Dreos et al., "New alkyl-cobalt(III) complexes with tridentate amino-oxime ligands: Synthesis, structure, and reactivity", EUR J INORG, (1), 2001, pp. 267-276

Abstract

The oxidative addition of alkyl halides to the Co-I species generated by the reduction of [Co-III(LNHpy) (HLNHpy)](ClO4)(2) (1), where HLNHpy is the tridentate 2-(2-pyridyl-ethyl)amino-3-butanone oxime ligand and LNHpy is its conjugate base, led to the formation of a new class of organocobalt complexes of general formula [RCoIII(LNHpy) (HLNHpy)](ClO4) [R = Me (2a), Et (2b), CH2CF3 (2c), nBu (2d), and CH2Cl (2e)]. All the complexes were characterised by H-1 and C-13 NMR spectroscopy. The X-ray structures of 2a, 2b and 2e provide evidence for a pseudo-octahedral configuration, where HLNHpy and LNHpy act as bi- and tridentate ligands, respectively. The axial geometry in 2a is closer to that found in methylcobalamin than that reported for other models, suggesting steric and electronic cis influences of the equatorialligands close to those of the corrin nucleus. The solution properties and the reactivity show strong analogies with those of the previously known Vitamin Bit models.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/04/20 alle ore 21:04:43