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Pseudo-octahedral complexes

Co111.1279 In these reactions the Ni11 center normally retains its square planar geometry, but the reaction with [PtCl2(bipy)] results in a pseudo-octahedral complex [ (H20)2Ni(aet)2 Pt(bipy)]2+. Reaction with bipy gives [ (bipy)Ni(aet)2 Pt(bipy)]2+.1280... [Pg.359]

Reaction of 3-(2-pyridyl)pyrazole and 6-(3-pyrazolyl)-2,2 -bipyridine with zinc salts results in mononuclear pseudo-octahedral complexes [ZnL3](PF6)2 and [ZnL2](PF6)2 respectively. The ligands coordinate as neutral mononucleating chelates in a similar fashion to the bidentate 2,2 -bipyridine or tridentate 2,2 6, 2"-terpyridine respectively.153... [Pg.1158]

General Structural Features. The general structure of halfsandwich ruthenium(II)-arene complexes is shown in Fig. 12. The structural, stereochemical and electronic features of metal-arene complexes have been discussed (63). A typical piano-stool geometry consists of an rj6-arene occupying three coordination sites of the pseudo-octahedral complex, leaving the three legs X, Y, and Z available for coordination. The sites X and Y can be taken up by two monodentate ligands, but are more commonly... [Pg.24]

NMR studies of the fluxionality of octahedral transition element dithiocarbamates were performed by Pignolet and coworkers.65 The synthesis and X-ray structure of the pseudo-octahedral complex ion (40) were described by McCleverty et al. in their investigations of the inorganic aspects of rubber vulcanization.66 Our investigations point to the existence of a barium analogue.67... [Pg.586]

NMR and other spectroscopic properties have been reported (53) for pseudo-tetrahedral and pseudo-octahedral complexes of type MLX2 where M = Co(ii), Ni(ii), and Cu(ii), X = halide, and L = N,N -bis(phenylaminomethyl)parabanic acid [4]. The NMR spectra of the... [Pg.16]

Pseudo-octahedral complexes of Ni(ii) with 1,3-diamine chelates have been shown (247) to undergo a rapid conformational interconversion [46]. In the diagram, (a) refers to the chair-chair equilibrium and (b) to the twist-twist equilibrium. The results indicate that... [Pg.52]

In addition to the 72 and states, the T, state lies some 500cm above in pseudo-octahedral complexes. In lower symmetry complexes both E and Tj are split, and in strong tetragonal fields, one of the Tj components is below E [32] as evidenced by the markedly broader emission spectrum [33]. There appears to be good thermalization between the Ti and E states. As a result of the thermalization, all of the photophysical rates for steps originating in E/ T, are population weighted averages of the rate constants for the individual states. If all reaction occurs in doublet states, the same conclusion applies to calculated from Eq. (21). [Pg.231]

The high-spin pseudo-tetrahedral complexes [Fe(S2PX2)2] (X = CF3, Me, or Ph) have been reported, as have the pseudo-octahedral complexes [FeL2X2] [X = Cl, Br, or I L = (63)].p-Thioxan (TX) forms the complex [Fe(TX)2-... [Pg.220]

The cyclopentadienyl ligand (Cp) is very widespread in organometal-lic chemistry. When it is coordinated in the ti mode, the most common situation, it behaves as an L2X ligand (Chapter 1, 1.1.1.3). [CpMLj] complexes (L = CO, PR3,. ..) are therefore pseudo-octahedral complexes of the ML5X type, which have 18 electrons when their electronic configuration is 4 . A 4 [CpMLj] complex may therefore be used as a new initial structure, very similar to that used previously. Since the presence of the cyclopentadienyl ligand oxidizes the metal by one unit, a metal with seven valence electrons (M = Mn, Tc, Re) must be used to obtain a neutral complex. The complex [CpMn(CO)3] is therefore a... [Pg.194]

The pseudo-octahedral complex (4) has been produced by aerial oxidation of 3,5-di-t-butylcatechol in the presence of ammonia and Mg ". It is also formed... [Pg.45]


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See also in sourсe #XX -- [ Pg.238 ]




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Pseudo-octahedral

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