Organoarsenic III compounds

The first 1-coordinate organoarsenic(III) compound, RC=As, (R = 2,4,6-tri-f-butylphenyl) was isolated in 1986 as pale yellow crystals, mp. 114°C/  

Some examples of 2-coordinate organoar-senic(III) compounds are  

The first such compound to be prepared was the deep-yellow unstable compound 9-arsa-anthracene but the thermally stable colourless arsabenzene (arsenin) can now conveniently be made by a general route from l,4-pentadiyne  

Arsine complexes are especially stable for b-class metals such as Rh, Pd and Pt, and such complexes have found considerable industrial use in hydrogenation or hydroformylation of alkenes. 

Elschenbroich, j. Kroker, W. Massa, M. Wunsch and A. J. Ashe, Angew. Chem. Int. Edn. Engl. 25, 571-2 

---

II. PREPARATION OF ORGANOARSENIC(III) COMPOUNDS A. Preparation of Tr organoarsenic(lll) Compounds... 

Oxidation of organoarsenic(III) compounds containing As—N bonds by chloranil or CI2 gives the corresponding arsenic(V) nitrogen compounds as shown in equations 324 and 325. ... 

Several organoarsenic(III) compounds containing arsenic(III)-transition metal bonds have been oxidized by halogen-based electrophiles or by elemental sulfur to give the corresponding dihalides or sulfides (equations 365 , 366 and 367 - ). 

---