Mercury complexes phosphorus ligands

S.2.4.2.4. Complexes of Mercury(l) with Phosphorus-, Arsenic-and Antimony-Donor Ligands. 

Phosphorus magnetic shielding tensors, general phosphido ligands in transition metal complexes, 1, 472 Phosphorus(III) mercury compounds, preparation, 2, 425-426 Phosphorus—metal complexes, characteristics, 2, 34 Phosphorus—nitrogen-containing rings, chromium carbonyl link, 5, 225... 

The ligand 2,6-bis(diphenylphosphino)pyridine was metallated at both phosphorus atoms using Fe(CO)5 (Equation (68)). " X-ray crystallography demonstrated the presence of both eclipsed and staggered conformations. Further reactions of the ligand to synthesize various heterometallic complexes with silver and mercury were also performed. 

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. 

Other compounds characterized and analyzed by XRD, with other complementary techniques used, include the sterically-crowded triarylphos-phines with formyl and benzoyl groups, benzyl(triphenyl)phosphonium dichloroiodate, the A,A-bis(terphenyl)aminophosphenium cation, dithiophosphinate ligands, and mercury(II) complexes of a-keto stabilized phosphorus ylides. Also, the crystal and molecular structure of 2-(4-chlorophenyl)-5,7-dimethoxyquinolin-4-yl phenyl bis(2-chloroethyl)phos-phoramidate (32) has been determined by NMR, IR, and XRD analysis. The crystal is triclinic, PI space group, a = 9.5188 A, )= 12.856 A, c= 13.250 A, F= 1412.0 A, and Z = 2 (at 291K). The crystal packing... 

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