Diphenylarsinoderivatives of Maleic Acid Anhydride and Related Compounds. Crystal and Molecular Structure of 2,3-Bis(diphenylstibino)maleic Acid Anhydride

Article abstract of DOI:10.1007/BF00938726

The unusual properties of bis(diphenylphosphino)maleic anhydride and similar ditertiary phosphines has prompted the synthesis of analogous arsines and stibines.Bis(diphenylarsino)maleic anhydride, -maleic thioanhydride and -N-methyl maleic imide, bis(diphenylstibino)maleic anhydride (5) and -maleic thioanhydride are obtained as crystalline yellow or red compounds by the reaction of the corresponding 2,3-dichloromaleic acid derivatives with diphenyl(trimethylsilyl)arsine and -stibine resp.The uv/vis spectra and characteristic i.r. bands of selected compounds are given and compared with those of the corresponding phosphines.The strong shift of ν_C=C to lower wavenumbers observed in all compounds has caused the determination of crystal and molecular structure of 5 by x-ray diffraction.Bond distances and angles are given.The complex formation of the new diarsine ligands has been examined by the preparation of Ni-, Cr- and Mo-carbonyl derivatives.As the first organylsulfane substituted maleic acid derivatives bis(phenylthio)maleic thioanhydride, -N-methyl-maleic imide and -maleic acid dimethylester are synthesized and described. - Keywords: Bis(diphenylarsino)maleic acid, derivatives; Bis(diphenylstibino)maleic anhydride, synthesis, crystal structure; Bis(phenylthio)maleic acid, derivatives; Maleic acid derivatives, synthesis, molecular structure