Synthesis, vibrational spectroscopic investigation, and structure study of some bismaleimide

Abstract EN

The N,N`-alkyl and aryl bismaleimide (BMIs) have been synthesized and studied spectroscopically and X-ray single crystal analysis.

The structure of bismaleimides was confirmed by Elemental analyses, EI-mass, FT-IR, 1HNMR, 13CNMR, DEPT-135 NMR, COSY, HSQC and HMBC spectral data and X-ray of BMI7.

Infrared spectra of serial from bismaleimides have experimentally been reported in the region of 4000–600 cm-1 to study the effect of spacer between two maleimides moieties , by three type of spacer , first direct N-N bonded ,second with different aliphatic serial and finally by two different aromatic molecular as spacer.

The position of the absorption bands for some functional groups (C = O, C = C, C-H and C-N) varies depending on the type and length of the link spacer (R) between the two maleimide rings moieties on the studied bismaleimides.

The optimized molecular structure has been investigated experimentally and theoretically using Gaussian09 software package.

DFT calculations were carried out by using B3LYP funcutional with 6-311G (d,p) basis set.