Manganese complexes bipyridyl

Iron-phthalocyanine (Fe-Pc) encapsulated in Y and VPI-5 zeolites were used for the oxidation of alkanes or olefins in presence of t-butylhydroperoxide or H2O2 (Fig. 9). Fe-Pc-Y also catalyzed the oxidation of cyclohexane to cyclohexanol and cyclohexanone with t-butylhydroperoxide ( TBHP ). Ruthenium perfluorophthalocyanine complexes encapsulated in NaX ( Ru-Fi6 Pc-X ) were active for the oxidation of cyclohexane with TBHP at room temperature.Manganese(II) bipyridyl complexes in faujasite ( Y ) zeolite are active for the oxidation of cyclohexene to adipic acid in the presence of H2O2 at room temperature. Similarly oxidation reactions have been reported using copper complexes encapsulated in X,Y, and VPI-5 molecular sieves. 

Manganese(tl) complexes,, 3, 9-82 acctylacetonates, 48 acetylides, 14 alcohols, 37 alkoxides, 37 alkyl phosphines, 13 alkyls, 12 amides, 15, 16 amine oxides, 39 amines, 16 amino acids, 43, 62 sulfur containing, 70 ammines, 15 antimony ligands, 31-34 arsenates, 4,5, 46 arsenic ligands, 31-34 arsenic oxides, 39 aryls, 12, 14 azides, 22 binary alkyls, 13 bipyridyl, 24, 25 anions, 25... 

Manganese(IV) complexes, 102-109 alkyls, 103 bipyridyl, 103 bipyridyl oxides, 106 carbon ligands, 102 catechol, 106 chlorides, 108 cyanides, 83,102 dialkyidithiocarbamates, 106 dithiolates, 106 dithiolenes, 107 fluorides, 107 halides, 107 hydroxides, 104 iodates, 105... 

Photopolymerizable coatings relief-image-forming systems, 6,125 Photoreactivity environmental effects, 1, 394 Photoredox properties bipyridyl metal complexes, 2, 90 Photoresist systems, 6,125 Photosensitive materials, 6, 113 Photosynthesis anoxygenic, 6, 589 magnesium and manganese, 6, 588 water decomposition models, 6, 498... 

Stewart s conclusion underscores the need for short-wavelength, low-temperature studies, if very high accuracy electrostatic properties are to be evaluated by Fourier summation. But, as pointed out by Hansen (1993), the convergence can be improved if the spherical atoms subtracted out are modified by the k values obtained with the multipole model. Failure to do this causes pronounced oscillations in the deformation density near the nuclei. For the binuclear manganese complex ( -dioxo)Mn(III)Mn(IV)(2,2 -bipyridyl)4, convergence of the electrostatic potential at the Mn nucleus is reached at 0.7 A" as checked by the inclusion of higher-order data (Frost-Jensen et al. 1995). 

The magnetic susceptibilities of [Mn(bipy)3],2THF and Li[Mn(bipy)3],4THF have been determined over the range 1.5 to 300 K. The susceptibility of the latter can be best explained on a radical-ion model in which three bipyridyl radical-ion ligands are co-ordinated to manganese(n) i.e. [Mn2+(bipy )3] rather than [Mn (bipy)3]. A similar model is also proposed for the other complex.68 The octahedral polymers Mn(4,4 -bipy)X2 (X = Cl or Br) have been prepared.69... 

In solution, complexes of manganese ions with BPY easily form dimeric complexes, the link of the nuclei occurring either via a /x-oxo or a /x-hydroxy ligand [23J. Such complexes arc very active in the decomposition of fyCh- With the ligand method, i.e. via addition of bipyridyl ligand to Mn(ll) exchanged Y zeolite, a monomeric form of the complex is stabilized in the supercages (Mn(BPY)2) f35]. 

Table 11.2 Stability constants (logarithmic) of some complexing agents (in water at 20°C) (saturated constants reported as log P). The ratio is given as a pre-index thus manganese forms a 2 1 complex with bipyridyl (log = 6), reported as 6 whereas it forms only a 1 1 complex with EDTA (log = 13), reported as 13... 

The catalytic activity of co-ordination compounds in oxidations continues to be examined and, together with the Faraday Society Discussion, other aspects of this area of investigation have been the subject of recent reviews. Redox reactions involving bipyridyl and u-phenanthroline complexes of transition metals have been discussed and catalytic oxidations of complexes of manganese, cobalt, copper, and palladium have also been surveyed. Reviews are also available of ruthenium ammine chemistry, and redox reactions involving molybdenum complexes, together with an account of catalase and peroxidase reactivity of copper(ii) complexes. ... 

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