M. Abd-Alla, A. El-Shahawy
1992
Citations
0
Influential Citations
5
Citations
Journal
Polymer
Abstract
Abstract Nitration of 2,5-bis( p -chlorobenzylidene)cyclopentanone (I) afforded the corresponding 2,5-bis( p -chloro- m -nitrobenzylidene)cyclopentanone (II). Polymerization of II with Na 2 S in N -methylpyrrolidone gave poly[2,5-bis(3-nitrobenzylidene)cyclopentanone sulphide]. The monomer was characterized by infra-red and 1 H nuclear magnetic resonance spectroscopy and elemental analysis. The polymer formed was confirmed by elemental analysis, infra-red spectroscopy, viscometry, differential thermal analysis measurements, thermogravimetry and X-ray analysis. An isothermal electrical conductivity test of the new polysulphide polymer indicates that it has a value of about 3.2 × 10 −3 ohm −1 cm −1 at 390 K. Using the Pariser-Parr-Pople method the CO oxygen atom in compound II has a partially positive charge in the normal state, reduced and oxidized forms. The ionization potential and the electron affinity are not altered by replacing the sulphur atom, i.e. 9.55 (9.56) and 7.94 (7.77).