Bis amido

Protonolysis of the f/ -styrene zirconium complex Cp Zr(t/ -PhCHCH2) [MeC(NPr )2] with 2 equivalents of Bu NH2 provided a high yield of a novel bis(amido) complex according to Scheme 93. ... 

The bis amido complex [Au(bipy)(NHC6H4N02-4)2][Pp6] (43) has been similarly obtained by reaction of 40 with p-nitroaniline in acetone solution (Equation 2.14 in Scheme 2.6) [45b]. Complex 40 promotes the stoichiometric oxidation of various amines different from p-nitroaniline. Azotoluene is the main organic product of the... 

Bis(amido)-germylene and -stannylene react with [Pt(COD)2] to give the platinum(O) complexes [Pt(M NTMS 2)3], M = Ge or Sn.78 The stannylene complex has a trigonal-planar structure with Pt—Sn bond lengths of 2.47-2.50 A.79... 

Chakraborty and Chen reported the syntheses and structures of organzinc compounds bearing chiral trans-1,2-(HNSiMe3)2-cyclohexanediyl ligands for the stereoselective polymerization of methacrylates. Depending upon the reaction conditions, Scheme 62, either the fully deprotonated trimeric bis(amido)methylzinc complex 80, or a dimeric amido(amino)methylzinc complex 81 were isolated.140... 

Figure 11 Common coordination modes of bis (amido)cyclodiphosphazane dichalcogenides...

These bis(amido)ruthenium(IV) and bis(amido)osmium(IV) porphyrin complexes show well-resolved H NMR spectra with the signals of the porphyrinato ligands appearing at normal fields, indicating that they are all diamagnetic. 

Structurally very close to the N,N,O-tridentate ketiminate systems, magnesium complexes bearing bis-amido-oxazolinate complexes 44a-e were used in the PLA preparation from L-lactide in the presence of benzyl alcohol. The low reactivity of 44d, e is due to the presence of a pendant functionality engaging the metal center, and the steric bulk of the phenyl group hindering the coordination of benzyl alcohol or of a monomer to the metal center, contributing to a diminution of the propagation [69]. 

Yttrium bis(alkyl) and bis(amido) complexes of the type [LY(CH2SiMe3)2] bearing N,0-multidentate ligands (L), such as p-diimines, displayed high activity for the ROP of L-lactide at room temperature (100% conversion in most experiments in THF within 2-60 min). In this case, an influence of the ligand framework and the geometry of the alkyl(amido) species (single site or double site) on the catalytic activity have been reported [106]. 

The reactions of lithium amides with pnictogen halides have also been used in the synthesis of heavy cyclopnict(III)azanes. For example, the combination of one equivalent of LiNH Bu and two equivalents of DippNHLi in reactions with ECI3 produces the series of bis(amido)dipnict(III)azanes [DippN(H)E... 

The following mononuclear bis(amido)metal(III) compounds were reported in the post-... 

The bis(amido)metal(III) chlorides have been used extensively as sources of bis(amido)-metal(III) salts (see Section The chloride 16 (M = Sb, R = Bu )... 

Table 10.3 lists the cationic bis(amido)metal(Iir) compounds which have been reported. The first of these, in 1981, described by Cowley and coworkers, was [As(ri5-C5Me5)(NMe2)] -[AlCy. An isoleptic series [M(p-NBu )2SiMe2][AlCl4] (M = As, Sb, Bi) was provided by Veith and coworkers in 1988 " this included the thus far sole example of a cationic amidobismuth compound, which has close cation-anion Bi Cl contacts. It is evident from... 

Upon acetylation and subsequent O-deacetylation in alkaline media, both the mono- and bis-(amido) derivatives of mono- and disaccharides always showed great stability, with high recoveries of the original amido sugar. 

The improvement in the yields of bis(amido) sugars, previously observed6 when water was used instead of methanol, was re-investi-gated in the ammonolysis of maltose octaacetate.47 As already mentioned, the yield of l,l-bis(acetamido)-l-deoxymaltitol (49, see p. 93) changed from 0.8 % in methanol to 27 % in water. Analogous results were obtained (see p. 94) for octa-O-acetylmelibiose.49 The interpretation of these differences was based on previous studies63 on the ammonolysis of simple esters. 

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