New routes to halo-complexes of gold by halide exchange from Au2Cl6. Crystal and molecular structure of triphenylmethyl tetrachloroaurate(III), CPh3[AuCl4].

Anhydrous [Au2Br6] and Aul can be obtained by halide exchange from [Au2Cl6] with RX (X = Br or I, R = H or alkyl). The addition of [Au2Cl6] to CPh3Cl produces the ionic derivative [CPh3][AuCl4] whose crystal and molecular structure has been determined by X-ray diffraction. Crystal data: space group P2(1)/c, a = 8.225(3), b = 14.671(6), c = 16.738(8) angstrom, beta = 97.85(2)-degrees and Z = 4. Other organic chlorides RCl (R = Pr, SiMe3 or Bu(t)) react with [Au2Cl6] with a partial reduction to the mixed-valence chloride [Au4Cl8]. Addition of [Au2Cl6] to anhydrous iron(III) chloride produced a mass-spectrometrically active mixed iron-gold species

of Dalton Transactions Probing bioinorganic chemistry processes in the bloodstream to gain new insights into the origin of human diseases Probing the kinetics of ligand exchange on colloidal gold nanoparticles by surface-enhanced raman scattering A new he

The new silicates K 2 Si(NCE) 6 , E = O, S (1a,b) were synthesised directly by reaction of silicon tetrachloride with potassium cyanate or thiocyanate. 1a,b can be converted to the salts (PPN) 2 [Si(NCE) 6 ] (2a,b) with bulky cations (PPN + = N(PPh 3 ) 2 + ), which contain isolated silicate dianions. Reaction of 1a with diimines affords the hexacoordinate complexes Si(NCO) 4 L, L = bpy (3), phen (4), which are the first isolated neutral adducts to Si(NCO) 4 . The compounds were characterised by a combination of IR and NMR spectroscopies, MS, TGA, DSC and X-ray diffraction

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