Do paramagnetic platinum metal hydrides really exist? A reinvestigation of the synthesis and magnetochemical properties of Ir(H)x(Cl)2(P-i-Pr3)2 (1). Syntheses and crystal structure determinations of trans-Ir(H) (Cl)2(CO) (P-i-Pr3)2 (2), cis-Ir(H)(Cl)2(CO)(P-i-Pr3)2 (4) and trans-Ir(Cl) (CO) (Articolo in rivista)

Type

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

Label

• Do paramagnetic platinum metal hydrides really exist? A reinvestigation of the synthesis and magnetochemical properties of Ir(H)x(Cl)2(P-i-Pr3)2 (1). Syntheses and crystal structure determinations of trans-Ir(H) (Cl)2(CO) (P-i-Pr3)2 (2), cis-Ir(H)(Cl)2(CO)(P-i-Pr3)2 (4) and trans-Ir(Cl) (CO) (Articolo in rivista) (literal)

Anno

• 1997-01-01T00:00:00+01:00 (literal)

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

• 10.1016/S0020-1693(96)05498-9 (literal)

Alternative label

• D. Capitani, P. Mura (1997)
  Do paramagnetic platinum metal hydrides really exist? A reinvestigation of the synthesis and magnetochemical properties of Ir(H)x(Cl)2(P-i-Pr3)2 (1). Syntheses and crystal structure determinations of trans-Ir(H) (Cl)2(CO) (P-i-Pr3)2 (2), cis-Ir(H)(Cl)2(CO)(P-i-Pr3)2 (4) and trans-Ir(Cl) (CO)
  in Inorganica Chimica Acta (Testo stamp.)
  (literal)

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

• D. Capitani, P. Mura (literal)

Pagina inizio

• 169 (literal)

Pagina fine

• 181 (literal)

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

• http://dx.doi.org/10.1016/S0020-1693(96)05498-9 (literal)

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

• 258 (literal)

Rivista

• Inorganica Chimica Acta (Rivista)

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

• 13 (literal)

Note

• ISI Web of Science (WOS) (literal)
• Scopu (literal)

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

• Istituto di Metodologie Chimiche Istituto di Cristallografia (literal)

Titolo

• Do paramagnetic platinum metal hydrides really exist? A reinvestigation of the synthesis and magnetochemical properties of Ir(H)x(Cl)2(P-i-Pr3)2 (1). Syntheses and crystal structure determinations of trans-Ir(H) (Cl)2(CO) (P-i-Pr3)2 (2), cis-Ir(H)(Cl)2(CO)(P-i-Pr3)2 (4) and trans-Ir(Cl) (CO) (literal)

Abstract

• As further studies of our samples of Ir(H)(x)(Cl)(2)(P-i-Pr-3)(2) (1) led us to suspect that their paramagnetism was due to cooperative surface phenomena we decided a through reinvestigation of the system 1. The reaction of ethanolic solution of H-2[IrCl6] with P-i-Pr-3, in the presence of concentrated HCl, gave compound 1 in 70% yield. The magnetic moment of this sample does not exceed 0.5 BM. Washing the sample with water or with organic solvents and crushing it with a platinum spatula gave an increase in mu(eff). H-1 spin-lattice relaxation (T-1) measurement on solid samples of 1 at different mu(eff) values (0.5, 1.5 BM) suggest that the paramagnetism is due to cooperative surface phenomena and the bulk of 1 is diamagnetic. As found in the complex prepared starting from (NH4)(2)[IrCl6], the above sample shows two weak bands at 2116 and 2002 cm(-1). These, however, are not due to v(lr-H) but to the presence of small amounts of two carbonyl complexes. By bubbling CO gas into an ethanolic solution of 1, the trans-Ir(H) (Cl)(2)(CO) (P-i-Pr-3)(2) (2) compound is obtained. This carbonyl complex shows an extremely strong band at 2002 cm(-1). Trans-2, both in solution and in the solid state, isomerizes into cis-Ir(H) (Cl)(2)(CO) (P-i-Pr-3)(2) (4). By reacting an ethanolic solution of H-2[IrCl6] with P-i-Pr-3, without addition of HCl, a mixture of 1 and another complex, trans-Ir(Cl) (CO) (P-i-Pr-3)(2) (5), is obtained, characterized by a strong band at 1930 cm(-1). Subsequent refluxing of the mother liquor of the above synthesis gave pure 5. This new complex is responsible for the very strong band at 1930 cm(-1). Thus, the v(Ir-H) of complex 1 does not occur in the usual region, and may be masked by the H2O absorption at ca. 1700-1600 cm(-1). Crystallographic data: for trans-2 (at 298 K), a=15.515(6), b=8.633(4), c=19.521(9) Angstrom, beta=104.34(3)degrees in space group Ia (Z=4). For cis-4 (at 298 K), a=16.488(1), b=27.118(2), c=11.384(1) A in space group Pbca (Z=8). For trans-5 (at 298 K), a=8.152(3), b=8.918(3), c=16.639(6) Angstrom, beta=93.50(3)degrees in space group P2(1)/c (Z=2). (literal)

Prodotto di

• Istituto di metodologie chimiche (IMC) (Istituto)
• Metodologie NMR per lo studio delle scienze omiche (PM.P06.019.003) (Modulo)

Autore CNR

• PASQUALE MURA (Unità di personale interno)
• DONATELLA CAPITANI (Unità di personale interno)

Insieme di parole chiave

• Keywords of "Do paramagnetic platinum metal hydrides really exist? A reinvestigation of the synthesis and magnetochemical properties of Ir(H)x(Cl)2(P-i-Pr3)2 (1). Syntheses and crystal structure determinations of trans-Ir(H) (Cl)2(CO) (P-i-Pr3)2 (2), cis-Ir(H)(Cl)2(CO)(P-i-Pr3)2 (4) and trans-Ir(Cl) (CO)" (Insieme di parole chiave)

Incoming links:

Autore CNR di

• DONATELLA CAPITANI (Unità di personale interno)
• PASQUALE MURA (Unità di personale interno)

Prodotto

• Istituto di metodologie chimiche (IMC) (Istituto)
• Metodologie NMR per lo studio delle scienze omiche (PM.P06.019.003) (Modulo)

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

• Inorganica Chimica Acta (Rivista)

Insieme di parole chiave di

• Keywords of "Do paramagnetic platinum metal hydrides really exist? A reinvestigation of the synthesis and magnetochemical properties of Ir(H)x(Cl)2(P-i-Pr3)2 (1). Syntheses and crystal structure determinations of trans-Ir(H) (Cl)2(CO) (P-i-Pr3)2 (2), cis-Ir(H)(Cl)2(CO)(P-i-Pr3)2 (4) and trans-Ir(Cl) (CO)" (Insieme di parole chiave)