Seventeen cis-[Pt(am)2(ONO2)2] complexes (am = methylamine, cycloalkylamines, substituted pyridines, aniline, or benzylamine; 2am = 2,2′-bipyridyl) were synthesized by reaction of cis-[Pt(am)2l2] with silver nitrate in acetone. The reaction was rapid (5–20 min at room temperature) with a yield of about 85%. The complexes appear to be stable in acetone with respect to isomerization. Thus, after 1 h at 25 °C acetone solutions of cis-[Pt(am)2X2](am = cyclohexylamine or 4-methylpyridine; X = I or ONO2) showed no isomerization judging by 1H n.m.r. spectroscopy of these compounds and their corresponding trans isomers.
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Souchard et al. (1990) studied this question.
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