The complex bis(diiminosuccinonitrilo)platinum(II), [Pt(DISN)2], and the analogs [Pd(DISN)2] and [Ni(DISN)2] have been prepared by the reaction in aqueous solution of the appropriate divalent metal halide with diaminomaleonitrile, oxygen, and a base. The reaction of diiminosuccinonitrile with bis(cyclooctadiene)nickel(0) also yields [Ni(DISN)2]. [Pt(DISN)2] can be prepared from PtCl4, diaminomaleonitrile, and a base. An unusual material [Pt(DISN)2] [PtCl2(C6H5CN)2] has been prepared by mixing stoichiometric quantities of the two components. The structure of this material has been determined from three-dimensional X-ray data collected by counter methods. The space group is C2h 3-C2/m with a = 23.274 (6) Å,b = 12.439 (3) Å,c = 4.480 (2) Å, β = 98.68 (1)°, Z= 2, ρmeasd= 2.28 (1) g/cm3, and ρcalcd= 2.278 g/cm3. The structure has been refined by full-matrix least-squares techniques to a conventional R index (on F) of 0.029 for the 734 reflections with Fo 2> 3σ(F0 2). The material consists of independent [Pt(DISN)2] and [PtCl2(C6H5CN)2] molecules. The planar molecules form separate columns with interplanar distances of about 3.40 Å. The columns are held together by hydrogen bonds between the molecules. The bond distances found within the [Pt(DISN)2] molecule suggest that the ligand has a delocalized electronic structure and that the compound is best described as a platinum(II) complex.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Inorganic Chemistry