Phosphine amido ligand

Among the earliest multidenate undelocalized amido ligands to be investigated in a systematic way were hybrid ligands involving amido and phosphine donor sites such as D-F that were 

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A tridentate bis(amido)phosphine ligand, (MejSiNFlCFlgCF PPh, is employed to prepare several Zr(iv) complexes including the dichloride, dialkyl, and mixed alkyl complexes 190, via standard amine elimination and alkylation methodologies.165 The mixed methyl benzyl dialkyl complex shows a distorted trigonal bipyramid in which the methyl group is in the apical position trans to phosphorus and the 7]2-benzyl group is cis to phosphorus. Related... 

A series of zirconium(IV) complexes that incorporate the macrocyclic bis (amido-phosphine) ligand 63 (R = Ph) were described. The starting material, complex 65 (R = Ph, M = ZrCl2) was prepared by reaction of syn-63 with ZrCl2(THF)2. The subsequent replacement of the chloride ligands has been... 

Amido phosphine-donor complexes, with Zr(IV), 4, 799 Amidophosphines, chelating, in hydrogenations, 10, 14 Amido-supporting ligands... 

Bis(amido) phosphine-donor complexes, with Zr(IV), 4, 816 Bis(amido) pyridines, with Zr(IV) and Hf(IV), 4, 790 Bis(aminoalkylidyne) complexes, diiron carbonyl complexes with cyclopentadienyl ligands, 6, 248-251 Bisaminosilylenes, in molybdenum carbonyls, 5, 406 Bis(tj-arc nc) complexes, as metal vapor synthesis milestone, 1, 236... 

A range of chelating phosphine ligands with small bite size have been shown to stabilize metal bonds. In addition to chelates, metal phosphide, amido, and even polyelemental derivatives exist. A range of truly novel complexes are known, such as the two products isolated in low yield in equation (29). The dimers retain metal-metal bonding and stabilize the coordinated P2 and 6 fragments. ... 

Tris(amido)phosphines 40-43 react with Fc2(CO)9 to give mononuclear iron carbonyl complexes Fe(CO)4(PR3). IR data collected from these complexes, combined with data from similar complexes, revealed the TT-acidity of the phosphines to be 41 w 40 > 43 > P(OPh>3 >42 > PPh3 > P(NMe2)3- Variable-temperature NMR on the Fe(GO)4 complexes of 41-43 showed rapid exchange of axial and equatorial carbonyls from —80 to 20 °C, while complex 40 showed slow axial-equatorial carbonyl exchange even at room temperature, attributed to the steric bulk and rigidity of the ligand. 

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