Mono complexes arsenic

Platinum(II) Complexes with Phosphorus-, Arsenic-, and Antimony-donor Ligands 6.5.43.1 Mono-, bi-, and tridentate P-donor ligands... 

Polar, aprotic solvents such as DMF were necessary for the formation of (126). [Pd(diphos)2] (104) gave the best performance as catalyst. Using [Pd(DBA)2] (105) as palladium source, a number of mono- and bi-dentate nitrogen, phosphorus and arsenic ligands were investigated and Me2PCH2CH2PMe2 was found to be nearly as effective as diphos. The reaction of C02 with a bis(i73-allyl) complex of palladium was believed to be a key step in the process (equation 158). 

In reactions with metal or metalloidal halides, primary amines, because of their difunctionality, tend to yield more complex molecules, such as cyclic, cage, or polymeric structures. For example, cage-type structures of the type P4(NCH3)e and As4(NCH3)e have been prepared by methylaminolysis of phosphorus(III) or arsenic(III) chloride, respectively, and cyclic structures of formula (HNBC1)3 or (RBNC1)4 have been prepared from boron halides and ammonium chloride or mono-alkylamines. 

Just as certain chlorides are found to behave as useful solvents for the formation of chloro-complexes, bromo-complexes are formed in solutions of the corresponding bromides. The solvent behaviour of (for example) molten iodine mono-bromidei53 molten arsenic(III) bromide 54-156 aluminium (III) bromidei " or molten mercury(II) bromide -i has been described the chemistry in such solutions has been briefly re vie wed s 123,124 Hydrogen bromide is very similar, but has been discussed separately in this presentation as a protonic acceptor solvent (chapter IV). 

A variety of new complexes has been described in which [CpM(CO)n] residues (M = Cr, Mo, and W) are attached to phosphorus, arsenic, sulphur, tin, and mercury ligands. The cyclic amino-phosphine PhP(OCH2CHg)aNH has been incorporated both as a mono- and bi-dentate ligand in [CpMo(CO)n] complexes. The diazenido complexes [CpM(CO)gN=NMe] (M = Mo and W) react with (THF)MX [M L = Cr(CO)5 and Mn(CO)gCp] to give thermally stable products of the type [CpM(CO)gN—N(Me)M Ln]. A free-radical mechanism has been proposed for reactions in which the CO ligands in [CpMo(CO)sI] are replaced by alkyl or aryl isonitriles these substitutions are catalysed by [CpMo(CO)s]g. 

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