US EPA

1353330 

Journal Article 

The reactions of triethylamine-activated octasulfur with thioarsinites, L2As-SPh (L = Me, Ph), Bunsen's cacodyl disulfide, Me2As(S)-S-AsMe2, and triphenylarsine 

Sideris, TD; Tsivgoulis, GM; Vachliotis, DG; Ioannou, PV 

2009 

1 

Main Group Chemistry
ISSN: 1024-1221 

8 

3 

163-176 

10.1080/10241220903134429 

WOS:000270127900002 

The reactions of L2As-SPh (L = Me or Ph) with varying
amounts of octasulfur, activated by triethylamine, aiming at the preparation of L2As-S-AsL2 and
L2As(S)-S-AsL2 were slow and very complex in the sense that the composition in solution changed
on work up. Generally, the disulfide L2As(S)-S-AsL2 was formed admixed with L2As-S-NEt3+ and
L2As-S-. The disulfide Ph2As(S)-S-AsPh2 was not stable during chromatography giving sulfur (S-8)
and Ph2As-S-AsPh2 which was autoxidized to Ph2AsO2H center dot Ph2As(S)OH. Bunsen's cacodyl
disulfide, Me2As(S)-S-AsMe2, was electrophilic toward activated octasulfur reacting at As=S
sulfur. Triphenylarsine was oxidized to pure triphenylarsine sulfide in boiling ethanol by
octasulfur in the presence of a catalytic amount of triethylamine in short time and with
excellent yields. 

thioarsinites; bis(dimethylarsenic) sulfide; bis(diphenylarsenic) sulfide; dimethylarsino dimethyldithioarsinate; diphenylarsino diphenyldithioarsinate; triphenylarsine sulfide; octasulfur