The reaction of K-2[ReX6] (X = Cl, Br) with oxalic acid and triethylamine in dimethylformamide solution yields the substituted complexes [ReX4(OX)](2-) and cis-[ReX2(ox)(2)](2-), Which can be obtained separately depending on the amount of added amine. The crystal structures of (PPh4)(2)[ReBr4(ox)], cis-(PPh4)(2)[ReBr2(ox)(2)] and cis-(AsPh4)(2)[ReCl2(ox)(2)] have been determined by single-crystal X-ray diffraction. The anionic complexes are octahedral with only slight distortions. The direct isolation of the pure complexes as well as the formation of only the cis isomers - without the presence of trans isomers and/or [Re(ox)(3)](2)- _ is probably due to the kinetic inertness of Re(IV)-X bonds, which increases with the number of oxalato ligands bound to the metal ion.

Ligand substitution reactions of the [ReX6]2- (X = Cl, Br) anions. Synthesis and crystal structure of novel oxalato complexes of rhenium(IV)

ARMENTANO, Donatella;DE MUNNO, Giovanni;
2006

Abstract

The reaction of K-2[ReX6] (X = Cl, Br) with oxalic acid and triethylamine in dimethylformamide solution yields the substituted complexes [ReX4(OX)](2-) and cis-[ReX2(ox)(2)](2-), Which can be obtained separately depending on the amount of added amine. The crystal structures of (PPh4)(2)[ReBr4(ox)], cis-(PPh4)(2)[ReBr2(ox)(2)] and cis-(AsPh4)(2)[ReCl2(ox)(2)] have been determined by single-crystal X-ray diffraction. The anionic complexes are octahedral with only slight distortions. The direct isolation of the pure complexes as well as the formation of only the cis isomers - without the presence of trans isomers and/or [Re(ox)(3)](2)- _ is probably due to the kinetic inertness of Re(IV)-X bonds, which increases with the number of oxalato ligands bound to the metal ion.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS 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: http://hdl.handle.net/20.500.11770/150518
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 30
  • ???jsp.display-item.citation.isi??? 28
social impact