One possible pathway to produce 1 is that [(H3N)2Pt(-OH)2Pt(NH3)2](NO3)2, a well-known complex forming on treatment of cisPt(NH3)2I2 with AgNO3, reacts with aqueous ammonia. <...> The other possible pathway involves deprotonation of [Pt(NH3)4](NO3)2 to form monomeric Pt(NH3)3(NH2)NO3 followed by elimination of NH3. <...> The cationic portion consists of two symmetrical square-planar Pt centers with the inversion center at the midpoint of the Pt(1) Pt(1A) vector. <...> The Pt(II) ion is coordinated by four N atoms from two ammonia molecules and two bridging amido groups affording a slightly distorted square. <...> The molecules are stacked in such a way that the planes of coordination squares turn out to be parallel to each other with a distance of 3.501 Е. <...> Intermolecular Pt—H interaction between the -NH2 hydrogens and the platinum(II) centers of the adjacent molecule are observed. <...> The synthesis and chemistry of platinum(II) amido complexes have attracted interest for their relevance to the formation of C—N bonds in synthesis and catalysis [ 1—3]. <...> An amido-bridged diplatinum(II) complex, [(Ph3P)2Pt(-NH2)2Pt(PPh3)](BPh4)2, which was obtained by reaction of Pt(PPh3)Cl2 with 85 % aqueous hydrazine followed by addition of sodium tetraphenylborate, was first reported in 1967 by Mason et al [ 4 ]. <...> After this report several amido-bridged diplatinum(II) complexes containing phosphine ligands were synthesized by treatment of L2PtCl2 (L = phosphine ligand) with a strong base in liquid ammonia [ 5, 6 ], by reaction of hydroxo-bridged diplatinum(II) complexes with ammonia/amine [ 7—9], or by deprotonation of the corresponding monomeric platinum(II) complexes [ 10, 11 ]. <...> As compared to the systematic investigation of amido-bridged diplatinum(II) complexes containing phosphine ligands, less information is available about the platinum(II) complexes containing the ammine ligands. <...> The only reported complex of this type was a tetravalent diplatinum complex, [(H3N)4Pt(-NH2)2Pt(NH3)4]6+, which was prepared in 1982 by Kretsohmer and Heck and characterized by single-crystal X-ray structural analysis [ 12, 13 ]. <...> However, the obvious divalent analog, [(H3N)2Pt(-NH2 <...>