Amino complexes

The palladium(O) complex undergoes first an oxydative addition of the aryl halide. Then a substitution reaction of the halide anion by the amine occurs at the metal. The resulting amino-complex would lose the imine with simultaneous formation of an hydropalladium. A reductive elimination from this 18-electrons complex would give the aromatic hydrocarbon and regenerate at the same time the initial catalyst. 

Albeniz, A.C., Barbera, J., Espinet, P., Lequerica, M.C., Levelut, A.M. Lopez-Marcos, F.J. and Serrano, J.L. (2000) Ionic Silver Amino Complexes Displaying... 

Another approach to get new liquid crystals is the lateral fluorination of the stilbazole ligands,337 which is a common and highly effective tool to exert control over mesomorphism, crystal phase stability, and physical properties. Other modifications include the use of more alkoxy substituents and other alkyl sulfate anions.338-344 Ionic silver amino complexes also display liquid crystalline behavior at rather low temperatures they are of the form [Ag(NH2 -CJl +OJX (X = N03, n = 6,8,10,12,14 X = BF4, = 8,10,12,14).345... 

Table 1. The content of amino complex, in percentage. acids in proteins in the Grinization ...

Heating the trisilane internal amino complex (244) with a Ni or Pd catalyst results in splitting olf the disilane, PhMe2SiSiMc2Ph, to leave a silylene which was captured by a trapping agent PhC CPh... 

Creating acidic groups (carboxylic acids and phenol groups) on the internal soot surface by chemical oxidation with, e.g., chromic acid, fixation of cationic complexes of the catalyst (e.g., amino complexes of Pt(II) or Pt(IV) at the inner surface of the soot particles by ion exchange, followed by chemical or electrochemical reduction of these complexes... 

Table 39 Stepwise Stability Constants of some Six-coordinate Nickel(II) Amino Complexes...

Similarly, metathetical exchange of the labile acetonitrile ligands in the octahedral molybdenum complex (CO)2(MeCN)2BrMo( 3-C3Ph3) with a variety of bidentate amines led to the corresponding amino complexes (equation 267)311. These form crystalline acetonitrile solvates suitable for X-ray determination, which confirm the octahedral structure of these complexes and the occurrence of the cyclopropenyl and bromide groups in a tram-relationship. 

These complexes are easily prepared from the reaction of r-butyl hydroperoxide (TBHP) or cumyl hydroperoxide with the V-oxohydroxo complex (equation 10). The X-ray structure of VO(dipic)(OOBu )(H20) (22) revealed a pentagonal bipyramidal environment with an O—O triangularly bonded t-butyl peroxide group. This structure is comparable with that of the Vv-peroxo complex [V0(02)(dipic)(H20)]NH4231 and the Vv-0,iV-hydroxyl amino complex VO(dipic)-(0NH2)(H20).232... 

In view of the large difference in the reactivity of Cr+2 and Mn+2 aquo complexes it seems that the reactivity of the metal complex toward eaq is not related to the energy required to remove a second 4s electron. The similar reactivity of aquo and amino complexes makes the correlation between reactivity and redox potentials rather unlikely. As an alternative mechanism, we suggest that the availability of a vacant d orbital on the central atom and the energy gain on adding an electron are the major factors which determine the reactivity of transition metal ions. 

Alkoxo-amino complexes, in Ru and Os half-sandwich rf-arenes, 6, 524-525 Alkoxo complexes... 

Amido alkyl complexes, with Zr(IV) and Hf(IV), 4, 765 Amido-amino complexes, with mono-Cp Ti(IV), 4, 421 Amido-bridged compounds, in dinuclear Ru complexes,... 

This method, also named immediate (direct) interaction of ligands and sources of metal center [2], is the oldest and most widespread, in most cases the safest, preparative method. It is comparatively accessible with, in general, high yields of final products - metal complexes. Precisely as a result of its use, the majority of Werner coordination compounds with the simplest ligands water (aqua complexes), ammonia (amino complexes), halides, (5-di ketones, etc. - have been obtained. At present, the above method allows us to obtain practically all types of complexes (see Sec. 1.2) with all types of ligands (see Chap. 2). 

While lithium tetrahydridoaluminate(l -) is used extensively as a reducing agent,1 relatively little is known about the utility of amine and/or amino complexes (compounds of the general formulas H3A1(NR3) and H3 A1-... 

Amino complexes of Ru +/Ru + act similarly to their platinum relatives, Pt +/Pt + see Ruthenium Inorganic Coordination Chemistry). Although coordination of [(NH3)5Ru] + to N7 of guanine residues in DNA does not... 

The five-membered annulation of amino complexes appears not to be general for alkenyl complexes. The reaction of the morpholino complex analogous to (217) with 3-hexyne in DMF gives a low yield... 

The reactions of both alkoxy and amino complexes are highly stereoselective and give the unnatural epimer at the C-6 position in the penicillin analogs, but methods are known for inversion at this center, llie mechanism of these reactions is thought to involve the intermediacy of a metal-4cetene complex whose formation is photo-induced.Early indications that this was the case came when it was found these reactions fail to give cyclic products of any kind under thermal conditions. More recently, vi-nylketene complexes have been trapped from these reactions.With the recent realization that metal-ketene intermediates are likely to be involved in these reactions further development of the photo-induced reactions of Fischer carbene complexes can be anticipated. 

Chelate amino complexes (V Y = NH, Z = 0,S) were obtained from [7T-C5H5Co(CO)l2] with o-aminophenols and o-aminobenzenethiols (255). Related complexes are obtained from [Rh(CO)2Cl]2 with the latter ligands... 

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