Collect. Czech. Chem. Commun.
1973, 38, 559-564
https://doi.org/10.1135/cccc19730559
Infrared spectra of substituted 2-benzylidene-, 2-(5-phenyl-2-thenylidene)-, and 2-(5-phenyl-2-furfurylidene)-4,7-dithia-4,5,6,7-tetrahydro-1,3-indandiones, transmission of substituent effects by the thiophene and furan rings
A. Perjéssy, P. Hrnčiar and R. Sokolová