Complexes of the type [Pt(amine) 4 ]I 2 were synthesized and characterized mainly by multinuclear ( 195 Pt, 1 H and 13 C) magnetic resonance spectroscopy. The compounds were prepared with different primary amines, but not with bulky amines, due to steric hindrance.In 195 Pt NMR, the signals were observed between −2715 and −2769ppm in D 2 O. The coupling constant 3 J( 195 Pt– 1 H) for the MeNH 2 complex is 42Hz.In 13 C NMR, the average values of the coupling constants 2 J( 195 Pt– 13 C) and 3 J( 195 Pt– 13 C) are 18 and 30Hz, respectively.The crystal structure of [Pt(EtNH 2 ) 4 ]I 2 was determined by X-ray diffraction methods. The Pt atom is located on an inversion center.The structure is stabilized by H-bonding between the amines and the iodide ions.The compound with n-BuNH 2 was found by crystallographic methods to be [Pt(n-BuNH 2 ) 4 ] 2 I 3 (n-BuNHCOO). The crystal contains two independent [Pt(CH 3 NH 2 ) 4 ] 2+ cations, three iodide ions and a carbamate ion formed from the reaction of butylamine with CO 2 from the air.When the compound [Pt(CH 3 NH 2 ) 4 ]I 2 was dissolved in acetone, crystals identified as trans-[Pt(CH 3 NH 2 ) 2 (H 3 CNC(CH 3 ) 2 ) 2 ]I 2 were isolated and characterized by crystallographic methods.Two trans bonded MeNH 2 ligands had reacted with acetone to produce the two N-bonded Schiff base Pt(II) compound.