1407997-70-9Relevant academic research and scientific papers
Reactions of platinum(iv)-bound nitriles with isomeric nitroanilines: Addition vs. substitution
Chernyshev, Alexander N.,Bokach, Nadezhda A.,Gushchin, Pavel V.,Haukka, Matti,Kukushkin, Vadim Yu.
, p. 12857 - 12864 (2013/01/15)
The platinum(iv) complex trans-[PtCl4(EtCN)2] reacts smoothly and under mild conditions with isomeric o-, m- and p-nitroanilines (NAs) yielding two different types of products depending on the NA isomer, viz. the nitroaniline complexes cis/trans-[PtCl4(NA)2] (cis/trans-1-3) and the amidine species trans-[PtCl4{NHC(Et)NHC 6H4NO2-m}(EtCN)] (4), trans-[PtCl 4{NHC(Et)NHC6H4NO2-m}2] (5) and trans-[PtCl4{NHC(Et)NHC6H4NO 2-p}(EtCN)] (6). Complexes 4 and 5 undergo cyclometalation, furnishing mer-[PtCl3{NHC(Et)NHC6H3NO 2-m}(EtCN)] (7) and mer-[PtCl3{NHC(Et)NHC 6H4NO2-m}{NHC(Et)NHC6H 3NO2-m}] (8), respectively. Moreover, 8 both in the solid state and in solution undergoes the second step of the cyclometalation, generating [PtCl2{NHC(Et)NHC6H3NO 2-m}2] (9). In 4, the nitrile ligand is highly reactive toward nucleophilic addition and it undergoes facile hydration accompanied by the elimination of the nitrile, thus producing cis-[PtCl4(NH 2C6H4NO2-m){NHC(OH)Et}] (10), or methanol addition providing trans-[PtCl4{NHC(Et)NHC6H 4NO2-m}{NHC(Et)OMe}] (11). All compounds, besides 9, were characterized by C, H, and N elemental analyses, high-resolution ESI-MS, IR, 1H and 13C{1H} NMR spectroscopic techniques. Complex 9, which was not isolated as a pure compound, was identified in the reaction mixture by ESI-MS and 1H and 13C{1H} NMR spectroscopies. Complexes trans-1, trans-2, 4, 5, 6, 8, 10, and 11 were additionally studied by X-ray diffraction.
