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Influence of steric and electronic factors in the stabilization of five-coordinate ethylene complexes of platinum(II): X-ray crystal structure of [PtCl2(2,9-dimethyl-1,10-phenanthroline-5,6-dione)] (Articolo in rivista)

Type

Prodotto della ricerca (Classe)
Articolo in rivista (Classe)

Label

Influence of steric and electronic factors in the stabilization of five-coordinate ethylene complexes of platinum(II): X-ray crystal structure of [PtCl2(2,9-dimethyl-1,10-phenanthroline-5,6-dione)] (Articolo in rivista) (literal)

Anno

2004-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

10.1016/S0020-1693(03)00382-7 (literal)

Alternative label

Margiotta N. (a); Bertolasi V. (b); Capitelli F. (c); Maresca L. (a); Moliterni A.G. (c); Vizza F. (d); Natile G. (a) (2004)
Influence of steric and electronic factors in the stabilization of five-coordinate ethylene complexes of platinum(II): X-ray crystal structure of [PtCl2(2,9-dimethyl-1,10-phenanthroline-5,6-dione)]
in Inorganica Chimica Acta (Testo stamp.); Elsevier Science SA, Lausanne (Svizzera)
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Margiotta N. (a); Bertolasi V. (b); Capitelli F. (c); Maresca L. (a); Moliterni A.G. (c); Vizza F. (d); Natile G. (a) (literal)

Pagina inizio

149 (literal)

Pagina fine

158 (literal)

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357 (literal)

Rivista

Inorganica Chimica Acta (Rivista)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali

9 (literal)

Note

ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

a) Dipartimento Farmaco-Chimico, Università di Bari, via E. Orabona 4, 70125 Bari, Italy b) Dipartimento di Chimica e Centro di Strutturistica Diffrattometrica, Università di Ferrara, Via Borsari 46, 44100 Ferrara, Italy c) CNR IC (Istituto di Cristallografia), c/o Dipartimento Geomineralogico, via E. Orabona 4, 70125 Bari, Italy d) Istituto di Chimica dei Composti Organometallici ICCOM-CNR, via J. Nardi 39, 50132 Florence, Italy (literal)

Titolo

Influence of steric and electronic factors in the stabilization of five-coordinate ethylene complexes of platinum(II): X-ray crystal structure of [PtCl2(2,9-dimethyl-1,10-phenanthroline-5,6-dione)] (literal)

Abstract

Reactions of Zeise's salt (K[Pt(eta(2)-C2H4)Cl-3]) with oxidized phenanthroline ligands (1, 10-phenanthroline-5,6-dione, phedon, and 2,9-dimethyl-1,10-phenanthroline-5,6-dione, Me(2)phedon) are reported. Comparison with analogous reactions involving unoxidized phen (1,10-phenanthroline) and Me phen (2,9-dimethyl-1,10-phenanthroline) ligands indicates that these latter ligands are less capable to stabilize the five-coordinate species [PtCl2 (eta(2)-C2H4)(phenanthroline)] in which the phenanthroline and the olefin share the trigonal plane and two chlorines are in the axial positions. The X-ray structure of the four-coordinate species [PtCl)(Me(2)phedon)] indicates that the major difference between oxidized and unoxidized phenanthrolines is the loss of aromaticity of the central ring of phenanthroline. As a consequence, the oxidized phenanthroline becomes more flexible and can undergo a bowlike distortion so to reduce steric interaction between ortho substituents of phenanthroline and cis chlorine ligands. The increase in stability of the four-coordinate species with Me(2)phedon is concomitant with an increase in stability of the five-coordinate precursor complex with ethylene. In the latter case the stabilization is not of sterical origin but stems from reduced electron-donor properties of oxidized phenanthrolines. The balance of the two effects is such that the equilibrium between five- and four-coordinate species is more shifted in favour of the former species in the case of Me2phedon than in the case of Me(2)phen. (literal)

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