MnCl

This ion is derived from manganeseflV) chloride, MnCl4, but the latter has not been isolated. The MnCl ion is unstable, breaking down to give chlorine thus ... 

There are a number of complex chlorides of three general types M(MnCl2), M2(MnCl, and M4(MnClg). M is monovalent in each case. Fluorine forms only 9M(MnF.) and the only complex bromine compound reported is Ca(MnBt 4H2O. There are no iodide complexes. The anhydrous salt, MnCl2, forms cubic pink crystals, and three well-defined hydrates exist. Aqueous solubiUties of the tetrahydrate and dihydrate ate given in Table 7. 

MnCl (2-N C4H4N=CMeCH=CMeN-2-Cf.H4N= CMeCH=CMe, 4, 101 MnC22H22N204 Mn(acac)2(phen), 4, 49 MnC22H3(l04... 

In a related reaction, treatment of spirocyclic oxaziridines with MnCl(TPP), where TPP = m o-tetraphenylporphyrinate (2 — ), or photolysis leads to a lactam. 

Fig. 6 Method of (salen)MnCl entrapment into polysiloxane membranes...

In spite of these limitations, three examples of (salen)-metal complex adsorption have been described. In the first one, Jacobsen s complex (la-MnCl) was adsorbed on Al-MCM-41 [27] by impregnation with a solution of the complex in dichloromethane, an approach that prevents the possible cationic exchange. The results in the epoxidation of 1,2-dihydronaphthalene with aqueous NaOCl were comparable to those obtained in solution, with only a slight reduction in enantioselectivity (55% ee instead of 60% ee). However, recycling of this catalyst was not described. 

Jacobsen s complex (la-MnCl) was also immobihzed on MCM-41 modified with phenolic groups [39]. The surface phenoxide groups act as an-... 

If 24.0 mol of FeCl2 and 13.0 mol of KMn04 are mixed with excess HC1, how many moles of MnCl, can be formed ... 

H3CC 5H4)MnCl]n forms an insoluble white precipitate in pentane which has been characterized by elemental analysis, IR spectroscopy, and measurement of its EPR spectrum (g = 2.001). 

Manganese nitrosyl porphyrins [215] are considered good models for the iron-nitric oxide analogs, which are relatively unstable but very vital to many biological operations. A six-coordinate manganese nitrosyl porphyrin of the form (por)Mn(NO)(L), where por can be TTP (TTP = tetra(4-methylphenyl)porphine) and L = piperidine, methanol, 1-methyhmidazole, has been prepared [216] in moderate yields by the reductive nitrosylation of the (por)MnCl complex with NO in piperidine. The crystal structures of these compounds give indication of a linear Mn-NO bond [215]. 

Preparation of sec-or t-alcohols.1 A one-pot preparation of either sec- or t-alcohols involves reaction of RMnI with an acyl chloride to form a ketone com-plexed with MnCl and stable to further reactions with RMnI. The ketone can be reduced by LiAlH4 or NaBH4 to a sec-alcohol or converted into a r-alcohol by reaction with an alkyllithium or a Grignard reagent. 

For example, conversion of the hexacoordinate (octahedral) derivatives [MnHCl(PP3)] to the corresponding deprotonated pentacoordinate (trigonal-bipyramidal or square pyramidal) derivatives [MnCl(PP3)]+ (M = Fe, Ru, Os), Scheme 6, follows electrode mechanisms that are more or less complicated depending upon the nature of the central metal.16... 

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