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Nitration of 2,5-bis ( p-chlorobenzylidene )cyclopentanone (I) afforded the corresponding 2,5-bis ( p-chlorom- nitrobenzylidene)cyclopentanone (II). Polymerization of II with Na2 S in N-methylpyrrolidone gave poly [2,5-bis(3-nitrobenzylidene)cyclopentanone sulphide]. The monomer was characterized by infra-red and 1H 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 x 10- 3 ohm- 1 cm- 1 at 390 K. Using the Pariser-Parr- Pople method the C=O 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).

Посилання на статтю:

Arylidene polymers: 11. Synthesis of poly [2,5-bis ( m-nitrobenzylidene)- cyclopentanone sulphide] and some theoretical studies on its monomer unit / Mohamed A. Abd-Alla* and Anwar S. EI-Shahawy // Polymer. – 1992. – Vol 33. – P. 1525-1529.

Arylidene polymers: 11. Synthesis of poly [2,5-bis ( m-nitrobenzylidene)- cyclopentanone sulphide] and some theoretical studies on its monomer unit - Завантажити.