X-Ray diffraction analysis of the [PtenPyNO(2)Cl(2)](NO3) crystals was carried out (space group P2(1)/c, a = 8.252(1) Angstrom, b = 8.948(1) Angstrom, c= 19.942(2) Angstrom, beta = 96.06(1degrees), V= 1464.3(5) Angstrom(3), Z = 4: 1646 reflections, R-hkl = 0.21). In the complex, the Pt-N(en) bond trans to the shorter Pt-N(Py) bond is shorter than that trans to the longer Pt-N(NO2) bond.