//2-Chlorokomplexe von Succinimid und N-Chlorsuccinimid. Die Kristallstrukturen von PPh4[Cl(Succinimid)2], PPh4[[CI(N-Cl-Succinimid)2] und N-Chlorphthalimid /<2-Chloro Complexes of Succinimide and N-Chlorosuccinimide. The Crystal Structures of PPh4[Cl(Succinimide)2], PPh4[Cl(N-Cl-Succinimide)2] and N-Chlorophthalimide

The donor-acceptor complexes PPh4[Cl(succinimide)2] and PPh4[Cl(N-chlorosuccinimide)2] have been prepared by reactions of PPh4Cl with succinimide and N-chlorosuccinimide, re­ spectively. in acetonitrile solutions. The complexes have been characterized by IR spectros­ copy and by crystal structure determinations. The crystal structure of N-chlorophthalimide has also been solved. N-chlorophthalimide: Space group P212121, Z = 4. 941 observed unique reflections, R 0.025. Lattice dimensions at -50 °C: a = 572.8(1), b = 627.5(1), c = 2072.5(2) pm. The com­ pound has a molecular structure with intermolecular Cl —O-contacts of 294.6(2) pm. PPh4[Cl(succinimide)2]: Space group C222), Z = 8. 1643 observed unique reflections, R = 0.048. Lattice dimensions at -40 °C: a = 976.7(1). b = 2471.0(3), c = 1472.2(3) pm. The struc­ ture consists of PPh4+ ions and anions [Cl(succinimide)2]~, in which the chloride ion is coordi­ nated to the nitrogen bonded hydrogen atoms of the succinimide molecules with bond angles N H C l of 177(2)° and H C l H of 124.6(6)°. PPh4[Cl(N-chlorosuccinimide)2]: Space group ?2\ln, Z = 4. 2519 observed unique reflec­ tions, R = 0.045. Lattice dimensions at -70 °C: a 1761(2), b = 753.4(7), c = 2318(2) pm. ß = 100.98(7)°. The structure consists of PPh4+ ions and anions [Cl(N-chlorosuccinimide)2]_, in which the chloride ion is coordinated by the chlorine atoms of the N-chlorosuccinimide mole­ cules with bond lengths N -C l of 174.1(4) and Cl —Cl 289.5(3) pm. and bond angles of N C lC l of 177.8(1)° and C 1-C 1-C 1 of 85.24(6)° (average).