Arsenic trihalides complexes

The trihalides of arsenic and antimony are known to act as acceptor molecules and to form adducts with various donor molecules. The complexes formed with 2,2 -bipyridyl are appreciably ionized in nitrobenzene 9,1 and simple ionization has been proposed 91> 92h... 

The preparation of 1 1 complexes of arsenic, antimony, and bismuth trihalides with dithio-oxamides has been reported.647 I.r. spectra of the arsenic compounds point strongly to the probability of dimeric, octahedral structures, but with the two heavier Group V elements square-pyramidal structures have been suggested. Crystalline adducts 2MBr3,3dioxan, where... 

Elemental arsenic combines with many metals to form arsenides. When heated in the presence of halogens it forms trihalides however, pentahalides with the exception of AsF5 (2) and the unstable AsQ5 are not readily formed. It reacts with sulfur to form the compounds As2S3, AsS, As2S5, and complex... 

I.r. and Raman studies have shown the formation of complexes between tributyl phosphate and both arsenic and antimony tribromides. Cryoscopy in fused arsenic tribromide is reported for a num r of inorganic and organic solutes, showing dTj X values lower than the ideal value, and with dioxan the compound 2AsBr3,3dioxan, melting at 64 °C, is formed. Arsenic and antimony trihalides give a-bonded transition-metal derivatives, such as X2E[Fe(CO)2(Cp)]J, where E = As or Sb and X = Cl or Br, on reaction with metal carbonyl anions or metal carbonyls with metal-metal bonds. ... 

Bismuth trihalides along with the analogous arsenic and antimony compound form complexes with metal carbonyls with bismuth, however, only neutral species such as Cl2BiFe(CO)2Cp and Bi[Co(CO)3PPh3l3 were isolated. 

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