Arsine triphenyl-, complexes with

The [NdL4(C104)2]C104 complex has both ionic and bound perchlorate [218]. With L = triphenyl arsine oxide the complex types formed are [215] Ln(NCS)3L3, Ln(N03)3L2 Et0H, Ln(N03)3L3, Ln(NC>3)3L4. Triphenyl arsine oxide complexes appear to be stronger than the phosphine oxide based on the higher dipole moment of arsine. 

Bis-3,4-(trifluoromethyl)-l,2-diselenete 651 is prepared by refluxing selenium with hexafluoro-2-butyne. It reacts with triphenylphosphine and triphenyl-arsine. Triphenylphosphine selenide was isolated, but no other compounds were identified.Ring-opened complexes with nickel, copper, vanadium, molybdenum (652), tungsten, iron, and cobalt are analogous to complexes of the 1,2-dithiete (527) (Section XXXV.2.C.). 

With the ligand dbp similar reactions yielded CoCl(dbp)3 and Co(dbp)4, but no Co(BH4)(dbp)3. Triphenyl-arsine and -stibine and CoCl2 were reduced to black products, probably cobalt metal. From NaBH3CN is afforded a Co(BH3CN)(Ph2-PCH2CH2PPh2) complex, but this does not subsequently yield a dinitrogen complex. 

Chromium hexacarbonyl reacts with Ph2AsCH2AsPh2 yielding a compound of stoichiometry Cr(CO)2(Ph2AsCH2AsPh2) 357) and with triarylphosphines yielding complexes of the type [Cr(CO)2L]2 [L = PPhg, P( i-tolyl)3, and P(p-tolyl)3] (31). The arsine and triphenyl-phosphine compounds have been shown by X-ray analysis to possess the structures (VII) and (VIII), respectively, in which a phenyl group is... 

Grundnes, J., Klaeboe, P. and Plahte, E. (1967) Spectroscopic studies of charge transfer complexes. XV. Triphenyl arsine oxide with iodine and iodine cyanide. Sel. Top. Struct. Chem., 265-275. 

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