777922-90-4Relevant academic research and scientific papers
The metalla-Pinner reaction between Pt(IV)-bound nitriles and alkylated oxamic and oximic forms of hydroxamic acids
Luzyanin, Konstantin V.,Kukushkin, Vadim Yu.,Haukka, Matti,Frausto Da Silva,Pombeiro, Armando J.L.
, p. 2728 - 2732 (2004)
The nitrile ligands in the platinum(IV) complexes trans-[PtCl 4(RCN)2] (R = Me, Et, CH2Ph) and cis/trans[PtCl4(MeCN)(Me2SO)] are involved in a metalla-Pinner reaction with N-methylbenzohydroxamic acid (N-alkylated form of hydroxamic acid, hydroxamic form; F1), PhC(=O)N(Me)OH, to achieve the imino species [PtCl4{NH=C(R)ON(Me)C(=O)Ph}2] (1-3) and [PtCl4{NH=C(Me)ON(Me)C(=O)Ph}(Me2SO)] (7), respectively. Treatment of trans-[PtCl4-(RCN)2] (R = Me, Et) and cis/trans-[PtCl4(MeCN)(Me2SO)] with the O-alkylated form of a hydroxamic acid (hydroximic form), i.e. methyl 2,4,6- trimethylbenzohydroximate, 2,4,6-(Me3C6H 2)C(OMe)=NOH (F2A), allows the isolation of [PtCl4{NH=C(R) ON=C(OMe)(2,4,6-Me3C6H2)}2] (5,6) and [PtCl4{NH=C(Me)ON=C(OMe)(2,4,6-Me3C6H 2)}-(Me2SO)] (8), correspondingly. In accord with the latter reaction, the coupling of nitriles in trans-[PtCl 2(EtCN)2] with methyl benzohydroximate, PhC(OMe)=NOH (F2B), gives [PtCl 4{NH=C(Et)ON=C(OMe)Ph}2] (4). The addition proceeds faster with the hydroximic F2, rather than with the hydroxamic form F1. The complexes 1-8 were characterized by C, H, N elemental analyses, FAB+ mass-spectrometry, IR, 1H and 13C{1H} NMR spectroscopies. The X-ray structure determinations have been performed for both hydroxamic and hydroximic complexes, i.e. 2 and 6, indicating that the imino ligands are mutually trans and they are in the E-configuration.
