Manganese bipyridyl

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... 

The structure of di-p-oxo-tetrakis(bipyridyl)dimanganese(iii,iv)perchlorate monohydrate has been determined. The cation contains Mn and Mn bridged by two oxygen atoms. The two manganese atoms are unmistakeably different, smaller bond lengths being observed around the Mn ion. ... 

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... 

The cationic manganese carbonyl derivative Mn(CO)4(phen)+ has been isolated as the Co(CO)4 and Mn(CO)5 salts (445) and the technetium derivatives Tc(CO)s(phen)X are also known. The color is a function of the halogen X, changing from colorless (X = Cl), through bright brown (X = Br), to brown (X = I) (374). The reaction of bipyridyl with pentacarbonyliron induces disproportionation (375) this can also occur when bis(l,3-cyclohexadiene)tetracarbonyldicobalt is the reactant. However, [L2(CO)4Co2] has been prepared 62). 

Oxidation of the bipyridyl tetracarbonyl derivatives of molybdenum and tungsten affords seven-coordinate derivatives of the dipositive metals (662), e.g., the compound W(CO)3(bipy)(HgCl)2 contains tung-sten-to-mercury bonds (273). Compounds containingbidentateterpyridyl have been obtained from Cr(CO)e and Mo(CO)6 by reaction with terpyridyl in isopentane solution under the influence of UV light. Pentacarbonyl-manganese bromide affords the compound Mn(CO)3(terpy)Br (274) which has an infrared spectrum identical with that of Mn(CO)3(bipy)Br (1, 78, 242, 377). 

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]. 

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... 

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