H complexes of dimethyl dihydrogen benzophenonetetracarboxylate with various diamines

The structure of pseudopolymeric H complexes of dimethyl dihydrogen 3,3',4, 4'-benzophenonetetracarboxylate with various diamines, which are initial su bstances in preparation of polyimide foams, was studied by C-13 NMR spectro scopy. The chemical structure of various model H complexes was studied usin g AMI quantum-chemical calculations. The supramolecular structure of H comp lexes was studied by X-ray diffraction in the solid phase and by a rheologi cal method in the melt.