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Titolo:
CYCLOMETALATED COMPLEXES OF PALLADIUM(II) WITH 1-METHYL-2-PHENYLIMIDAZOLE AND TERTIARY DIPHOSPHINES - CRYSTAL AND MOLECULAR-STRUCTURE OF [O-C6H4C=NC(H)=C(H)NME])(PH2PCH(ME)PPH2-P,P)][PF6]
Autore:
VILA JM; GAYOSO M; PEREIRA MT; ORTIGUEIRA JM; TORRES ML; CASTINEIRAS A; SUAREZ A; FERNANDEZ JJ; FERNANDEZ A;
Indirizzi:
UNIV SANTIAGO DE COMPOSTELA,DEPT QUIM INORGAN SANTIAGO COMPOSTELA 15706 SPAIN UNIV LA CORUNA,DEPT QUIM FUNDAMENTAL & IND LA CORUNA 15701 SPAIN
Titolo Testata:
Journal of organometallic chemistry
fascicolo: 2, volume: 547, anno: 1997,
pagine: 297 - 307
SICI:
0022-328X(1997)547:2<297:CCOPW1>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
INTRAMOLECULAR-COORDINATION COMPOUNDS; LIGAND-EXCHANGE REACTIONS; X-RAY; DONOR LIGAND; CYCLOPALLADATED COMPLEXES; REACTIVITY; PD(II); BIS(N-BENZYLIDENE)-1,4-PHENYLENEDIAMINES; 2-ARYLPYRIDINE; MANGANESE(I);
Tipo documento:
Article
Natura:
Periodico
Citazioni:
57
Recensione:
Indirizzi per estratti:
Citazione:
J.M. Vila et al., "CYCLOMETALATED COMPLEXES OF PALLADIUM(II) WITH 1-METHYL-2-PHENYLIMIDAZOLE AND TERTIARY DIPHOSPHINES - CRYSTAL AND MOLECULAR-STRUCTURE OF [O-C6H4C=NC(H)=C(H)NME])(PH2PCH(ME)PPH2-P,P)][PF6]", Journal of organometallic chemistry, 547(2), 1997, pp. 297-307

Abstract

Treatment of Pd(AcO)(2) with 1-methyl-2-phenylimidazole, and subsequent treatment with sodium chloride or sodium bromide gave the corresponding halide-bridged cyclometallated complexes [Pd{o-C6H4C=NC(H)=C(H)NMe}(mu-X)](2) (2, X = Cl; 3, X = Br). Complexes 2 and 3 react with tertiary diphosphines in a 1:1 molar ratio to give dinuclear cyclometallated compounds with bridging diphosphine and halogen ligands [Pd{o-C6H4C=NC(H)=C(H)NMe}(mu-L-L)(mu-X)]X (4-9) or with only bridging diphosphine ligands [Pd{o-C6H4C=NC(H)=C(H)NMe}( mu-L-L)(X)(2)] (10-17), [X = Cl,Br; L-L = Ph2PCH2PPh2 (dppm), Ph2PC(=CH2)PPh2 (vdpp), Ph2PCH(CH3)PPh2(1,1-dppe), trans-Ph2P(CH=CH)PPh2 (trans-dppe), Ph2P(CH2)(2)PPh2 (dppe), Ph2P(CH2)(3)PPh2 (dppp), Ph2P(CH2)(4)PPh2 (dppb), as appropriate]. When the reaction is carried out in a 1:2 molar ratio and in the presence of NH4PF6 or NaClO4, mononuclear cyclometallated compounds with achelating diphosphine ligand are obtained [Pd{o-C6H4C= NC(H)=C(H)NMe}(L-L-P,P)][Y] (18-27) [Y=PF6, ClO4; L-L=Ph2PCH2PPh2 (dppm), Ph2PC(=CH2)PPh2 (vdpp), Ph2PCH(CH3)PPh2 (1,1-dppe), Ph2PN(CH3)PPh2 (dppma), cis-Ph2P(CH=CH)PPh2 (cis-dppe), Ph2P(CH2)(2)PPh2 (dppe), ph(2)P(CH2)PPh2 (dppp), Ph2P(CH2)(4)PPh2 (dppb)]. Compounds 18-22 and 25-27 could also be obtained by reaction of complexes 4-17 with the appropriate diphosphine and NH4PF6 or NaClO4. The diphosphines dppma and cis-dppe failed to behave as bridging ligands and only gave mononuclear compounds. Thecomplexes were characterized by their elemental analysis (C, H, N) and by IR and P-31-{H-1} and H-1 NMR data. The X-ray crystal structure of complex 22 is described. (C) 1947 Elsevier Science S.A.

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Documento generato il 21/09/20 alle ore 06:18:06