Polyarsines

Cyclic and Polymeric Substances Containing Arsenic—Arsenic Bonds. A number of organoarsenic compounds containing rings of four, five, or six arsenic atoms have been prepared (cycHc polyarsines). The first such four-membered ring compound to be adequately characterized, tetrakis (trifluoromethyl) tetrarsetane [7547-15-17, was obtained by the interaction of a diiodoarsine and mercury (107,108) ... 

Cychc polyarsines undergo a number of reactions with transition metal compounds to form complexes containing both As—As and As—metal bonds. The stmctural chemistry of these complexes has been the subject of a recent review (112). 

Five-coordination is now quite common in nickel(II) complexes and many polydentate ligands such as polyamines, salicylaldimines, polyarsines and polyphosphines have been designed with the purpose of favouring this stereochemistry.7,8 However, five-coordinate complexes with monodentate ligands ([Ni(CN)s]3 and [Ni(OAsMe)s]2+) are also known. 

M. Reactions of Metal Complexes with Polyphosphines and Polyarsines... 

Products from Reactions of Polyphosphines and Polyarsines Preserving E R and E-E Bonding... 

This reaction has long been known for the preparation of linear and cyclic polyarsines as shown in equations 195 ° and 196 °. ... 

Cyclic polyarsines add across dienes or acetylenes to give the corresponding heterocycles having As—As bonds (equations 197 ° and 198 ° ). 

Reaction of (MeAs)5 with RASH2 has been reported to be very efficient for the preparation of highly pure cyclic polyarsines (equation 199 ° ). 

Method 2. Polyarsinates of Trivalent, Chelated Metal Atoms... 

The syntheses of the octahedral complexes [Ir(tetas)X2]X (X = C1, Br or I), containing the tetradentate tripodal polyarsine As(o-C6H4AsMe2)3 (tetas), were described by Hill et al. Cyclic voltammetry revealed irreversible reduction... 

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