Stibines mechanism

These complexes are stable and easily prepared, and so are very commonly used in gold(I) chemistry. The usual synthetic method involves reaction of [AuCU]- with the tertiary phosphine, arsine or stibine (equation 43 Y = P, As or Sb, R = alkyl or aryl). The phosphine acts as both reducing agent and ligand in these reactions, and the mechanism has been studied in detail.328... 

Aryl-l-phenylethanol derivatives (378) are formed from the irradiation of styrenes (379) with triarylstibines (380) in the presence of oxygen. The yields of the products are modest (14-48%) and the mechanism for product formation involves a stibine/oxygen/styrene complex (381) which reportedly undergoes valence expansion to (382) followed by rearrangement to (383) and hydrolysis to yield the isolated alcohols. 

The incorporation of Sb and As into the asphaltenes may involve a different mechanism from that of the metals as these elements may replace S in the asphaltenes. Degradation of the asphaltenes would possibly reduce alkyl or aryl arsines RxAsHa x or stibines, RxSbHa-x/ several of which are water soluble. 

I. Mechanism of toxicity. The mechanism of antimony and stibine toxioity is not... 

The reaction of [PtI(Me)(CO)(PPha)] with a number of tertiary-arsine and -stibine ligands has now been studied. The proposed mechanism of reaction proceeds as follows ... 

---