521273-22-3Relevant academic research and scientific papers
Model complexes for metallated polythiophenes: Gold(I) and palladium(II) complexes of bis(diphenylphosphino)oligothiophenes
Clot, Olivier,Akahori, Yumi,Moorlag, Carolyn,Leznoff, Daniel B.,Wolf, Michael O.,Batchelor, Raymond J.,Patrick, Brian O.,Ishii, Mikita
, p. 2704 - 2713 (2008/10/08)
The preparations of two new phosphinothiophene ligands, 3,3′-bis(diphenylphosphino)-2,2′-bithiophene (dppbt; 1) and 3,3?-dihexyl-3′,3″-bis(diphenylphosphino)-2, 5′:2′,2″:5″,2?-quaterthiophene (hdppqt; 2) are reported. Oxidation of 1 gives 3,3′-bis(diphenylphosphine oxide)-2,2′-bithiophene (3), and the crystal structure of this compound was determined. Pd(II) and Au(I) complexes of these ligands have been synthesized and characterized. Crystal structures of [(dppbt)PdCl2] (1-Pd), [(hdppqt)PdCl2 (2-Pd), [(dppbt)(AuCl)2] (1-Au), and [(hdppqt)(AuCl)2] (2-Au) were obtained. [(dppbt)(AuCl)2] crystallized in two solid-state forms; crystals grown from CH2Cl2/Et2O show a gold-gold interaction of 3.3221(4) A, but from CH2Cl2/toluene, the molecule crystallizes as a toluene adduct (1-Au-tol) and does not show any gold-gold interaction. All the complexes were characterized via UV-vis spectroscopy and cyclic voltammetry, and the effect of the metal on the energy of the π-π*transition and oxidation potential was determined. These data are correlated to the interannular torsion angles in the oligothienyl groups from the crystal structure studies.
