38003-95-1Relevant academic research and scientific papers
α-cationic arsines: Synthesis, structure, reactivity, and applications
Dube, Jonathan W.,Zheng, Yiying,Thiel, Walter,Alcarazo, Manuel
supporting information, p. 6869 - 6877 (2016/06/14)
A series of structurally differentiated cationic arsines containing imidazolium, cyclopropenium, formamidinium, and pyridinium substituents have been synthesized through short and scalable routes. Evaluation of the donor properties of these compounds by IR spectroscopy and DFT calculations reveals similar σ-electron-releasing abilities for all of them; however, their π-acceptor properties are strongly influenced by the nature of the positively charged group. We describe the coordination chemistry of the newly prepared α-cationic arsines toward different metal centers and their reactivity in the presence of strong oxidants to afford cationic As(V) species. Their unique electronic properties have been exploited in Pt(II) catalysis to develop a new catalyst with remarkable activity in the cycloisomerization of enynes to trisubstituted cyclopropanes. To the best of our knowledge, this is the first report on the use of α-cationic arsine ligands in catalysis.
Diphenylarsinoderivatives of Maleic Acid Anhydride and Related Compounds. Crystal and Molecular Structure of 2,3-Bis(diphenylstibino)maleic Acid Anhydride
Fenske, Dieter,Teichert, Heinz,Prokscha, Heinz,Renz, Werner,Becher, Hermann J.
, p. 177 - 192 (2007/10/02)
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 νC=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
