Structure and Hydrolysis of Heterovalent polynuclear Oxonitrocomplexes of Ptii,iv in Aqueous Solutions by 195Pt and 15N nmr Spectroscopy

¹⁹⁵Pt and ¹⁵N NMR chemical shifts and constants of scalar spin–spin coupling, ¹⁹⁵Pt–¹⁵N and ¹⁹⁵Pt^II–¹⁹⁵Pt^IV, for the heterovalent platinum tetra- and hepta-meric oxonitrocomplexes [(NO₂)₆Pt^IV(μ-O)₃Pt^II₃(NO₂)₆]⁵⁻ and [(NO₂)₆Pt^II₃(μ-O)₃Pt^IV(μ-O)₃Pt^II₃(NO₂)₆]⁸⁻, and for products of hydrolysis of these complexes have been obtained by ¹⁹⁵Pt and ¹⁵N NMR spectroscopic studies on freshly prepared aqueous solutions and also on two month old solutions.