X-ray crystal structure of racemic bis(ethyl fumarate) (acetonitrile)nickel(0)

摘要: The crystal and molecular structure of racemic bis(ethyl fumarate)(acetonitrile) nickel(0) was determined from X-ray diffractometer data. solved by Patterson Fourier methods, refined least-squares techniques to R = 0.045 for 3034 independent reflections. Crystals are triclinic, space group P, with Z 2, in a unit cell dimensions: 9.219 (6), b 13.257 (3), c 10.521 (9) », α 92.57 (9)°, β 109.25 (10)°, γ 110.0 (9)°. The coordination around the atom (the four carbon atoms HCCH groups, N acetonitrile residue), may be described as planar, slightly distorted trigonal symmetry. conformations two ehtyl fumarate residues agree, more or less closely, principle staggered bonds. torsion angles groups significantly different 180°, observed other similar complexes. asymmetric molecule have same absolute configuration. SSSS RRRR molecules present cell.