Contrasting gold(I) affinity to C and N on electronegativity arguments may hinder the assembly of gold(I) arrays with mixed N-, C-donor bridges. Bridging CPC-ylide [Y] and NCN-formamidinate [F] separately render dull luminescent gold(I) dinuclear compounds.. The challenge was to obtain a hybrid dimer [Au2FY] to study the combined effects on structure and luminescencePoly-nuclear (Au3,Au2,Au4,Au8) arrays with opposite N-Au-C bonds are obtained under Schlenk conditions; formamidinate aurophilically bridges gold(I) (Au-NCN-Au); depending on basicity the ylide mono-coordinates (HY-Au) or bridges (Au-CPC-Au)The series comprises two trinuclear clusters [Au3FY2], [Au3F2Y] ; three open dinuclears [Au2F(HY)2]NO3, [Ph-Au2F(HY)], [Cl-Au2F(HY)] and [Au(HF)(HY)]PF6.. Basic activation of the ylide releases phenyls found in [Ph-Au2F(HY)] and in tetranuclear [Ph-Au(HY)-Au2F2-Au(HY)-Ph].A unique cubal assembly [Au8F4(?5-Y)2] featuring two rare hypercoordinating carbons is promoted by gold-carbon affinity and the tendency of gold(I) to aggregate.Due to Au-Au distance constraints the sought [Au2FY] hybrid is successfully synthesized from gold(II) precursor [Au2F2(NO3)2] by oxidation of the ylide ligandThe mixed bridging N-,C- coordination enhances luminescent properties as compared to non-luminescent Au-N, Au-Y parents and an ylide only trinuclear [Au3Y3] Compounds are characterized by X-ray crystallography, IR, NMR elemental analysis and luminescence spectroscopy

Augmented nuclearity in gold(I) arrays with disparate NN-, CC-donor bridges

247th National Meeting (2014)

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