854053-11-5Relevant articles and documents
Effect of the organic fragment on the mesogenic properties of a series of organogold(I) isocyanide complexes. X-ray crystal structure of [Au(C≡CC5H4N)(CNC6H4O(O) CC6H4OC10H21)]
Ferrer, Montserrat,Mounir, Mounia,Rodríguez, Laura,Rossell, Oriol,Coco, Silverio,Gómez-Sal, Pilar,Martín, Avelino
, p. 2200 - 2208 (2007/10/03)
Rod-like organogold(I) complexes [AuR(CNC6H4O(O) CC6H4OC10H21-p)] were prepared and their liquid crystal behaviour was studied. Depending on the nature of R, the synthetic methodology was different. Thus, for R = substituted alkynyl ligands, the new compounds were prepared in two steps:(i) reaction of [AuCl(tht)] (tht = tetrahydrothiophene) with R′CCH(R′ = C5H4N, C6H4CN, C6H4CCC5H 4N) in the presence of NaOAc to give insoluble [Au(CCR′)] n; (ii) reaction of the latter polymers with the isonitrile CNC 6H4O(O)CC6H4OC10H 21-p.For R = fluorinated aryls, the complexes were prepared by displacement of tht from the compounds [AuR(tht)] (R = C5F 4N, C6F4C5H4N, C 6F5) with isonitrile.In addition, an unexpected ionic derivative [Au(CCC5H4NC10H21) 2][Au(CCC5H4N)2] was formed in the reaction between [PPh4][Au(CCC5H4N) 2] and C10H21I. All these compounds have been characterized by IR and NMR spectroscopy and mass spectrometry. The X-ray crystal structure of the compound with R = CCC5H4N shows a linear molecule in which the gold atom is surrounded by the pyridine-containing acetylene and the isonitrile ligand, and no direct gold-gold interaction occurs. Six of the neutral compounds are liquid crystals and their optical, thermal and thermodynamic data were analyzed and compared in terms of molecular polarizability.
