The infrared spectra of complexes with planar dithiooxamides Part VIII. The Au(III) complexes

New powerful reagents based on dihalogen/N,N′-dimethylperhydrodiazepine-2,3-dithione adducts for gold dissolution: the IBr case

“…20 The Raman spectrum in the low frequency region shows a strong peak at 156 cm Ϫ1 which is assigned to the ν 1 symmetrical stretch of the IBr 2 Ϫ unit and two peaks (mw) at 238 and 225 cm Ϫ1 which are likely to be related to the Au-Br vibrations. 21 In order to evaluate the effectiveness of IBr-and I 2 -adducts in THF solutions compared with the commercial I Ϫ /I 2 aqueous mixtures currently under use for gold dissolution in the etching procedure of microelectronic devices, experiments on gold wires and Si/SiO 2 /Ti/Au thin layers (thickness 300 µm/0.5 µm/15 nm/200 nm) have been performed. Wires of the same length and thickness have been dipped into equimolar solutions (c = 5.0 × 10 Ϫ3 mol dm Ϫ3 ) of the three reagents, then removed, dried and weighed every 10 minutes as shown in Fig.…”

Ni(II), Co(II), and Cu(II) Ternary Complexes Containing 2,4,6‐tris(2‐Pyridyl)‐1,3,5‐triazine as Primary Ligand and Dithiooxamide, Thiosemicarbazide as Secondary Ligands

“…[10] The IR bands appearing at 3280 and 1575 cm -1 in the spectrum of dto due to n(NH 2 )and d(NH 2 ), respectively, [11] were found to be located at almost the same frequencies in the corresponding mixed-ligand complexes. Such a shift strongly suggests that the donor atoms in the mixed-ligand complexes have to be the sulfur atoms.…”

On the Use of the Bis(diiodine) Adduct of 1,4‐Dimethylperhydro‐1,4‐diazepine‐2,3‐dithione (Me2dazdt) to Recover Liquid Mercury Producing [Hg(Me2dazdt)I2] in a One‐Step Reaction

“…In fact, sulfur donation should be accompanied by a shift to lower frequencies of ν(CϭS) and simultaneously to higher frequencies of ν(CN). [17] Conflicting literature assignments of ν(CϭS)…”