Tris o-dimethylarsinophenyl stibine

Tris(o-dimethylarsinophenyl)arsine forms colorless crystals, m.p. 115°. The nmr spectrum in CDCI3 shows a single methyl resonance at t8.85. It 

The preparation of this ligand is essentially similar to that of the quadri-dentate arsine described in Sec. A. To the lithiated species produced from o-bromophenyldimethylarsine (42 g) and n-butyllithium (192 ml, 0.91M, 0.187 mole) prepared as above, is added antimony trichloride (13.8 g, 0.06 

The ligand is a white solid, m.p. 135°, which showsasingle methyl resonance at t8.80 (CDCI3 solution) in the nmr spectrum. 

Chiswell, Aspects of Inorganic Chemistry, Vol. 1, Macmillan Company, Ltd., London, 1973. 

The coordination chemistry of diphosphine and diarsine ligands has been intensively investigated in recent years.i Very much less work has been carried out on the corresponding mixed ligands, the intermediate arsine-phosphine bidentates, owing to a considerable extent to the lack, until recently, of suitable synthetic routes to such ligands. Two routes are now available the nucleophilic substitution of organohalogen compounds, two examples of which 

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Abbreviations Sbta = tris(o-dimethylarsinophenyl)stibine tap = tris(3-dunethylarsinopropyl)phosphine taa = tris(3-... 

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