4-methylphenyl complex with

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]. 

Ramamoorthy et al. (444) found that a-phenyl-A-(4-methylphenyl)nitrone can be the guest molecule in inclusion complexes with a p-cyclodextrin host in 1 1 and 1 2 ratios (guest/host), and that the latter undergoes a 1,3-dipolar cycloaddition reaction with electron-deficient alkenes. In more recent work, they have formed 1 1 inclusion complexes of the bowl-shaped p-cyclodextrin 383 with (3-nitrostyrene 381 or 1-nitrocyclohexene 382, which leave the alkene moiety exposed (Fig. 1.9) (445). Complexes 381 and 382 undergo cycloaddition reaction with ot-phenyl-A-(4-methylphenyl)nitrone in the solid state after thorough homogenization (60 °C, 3 h) to give the 4-substituted products exclusively in 80 and 85% yield, respectively. 

Electrochemical oxidation of cadmium in a solution of ](4-methylphenyl)sulfonyl]-2-pyridylamine] (HL) in acetonitrile/di chloromethane mixtures resulted in CdL2 complex formation [149]. The electrochemical oxidation of cadmium amalgam in nonaqueous solvents CH2CI2, 1,2-C2H4CI2, and PC was also used for the preparation of cadmium complexes with 18-membered macromonocyclic ligands, 18-06, 18-S6, I8-N2O4, and 18-N6 [150]. The stoichiometry and stability of resulted complexes were determined. The same method was used to examine the complexation of Cd(II) cation with 12-crown-4 ether, azacrown ether 1,4,8,11-tetra-azacyclotetradecane, and thiaazacrown... 

Worth mentioning are some relevant studies on the prototropic exchanges of azoles in excited states involving the formation of hydrogen-bonded complexes [(7a) - (7b)] via Si (85JPC399) in complexes with acetic or via Ti in complexes with benzoic acid (83JA6790), or intramolecular complexes, as in the case of 2-(2 -hydroxy-5 -methylphenyl)benzotriazole (82JCP4978). 

Scheme 10 Complexes with bis(o-hydroxyphenyl)phenylphosphine and bis (2-hydroxy-5-methylphenyl)phenylphosphine...

Although the description of most organometallic complexes is beyond the scope of this review, some of these types of complexes are relevant to the goal of developing catalysts that fix N2. The V111 complex with the (dimethylamino)methylphenyl ligand (188) is an example of such a complex and is stable in solution.794... 

Diimine Nickel and Palladium Complexes with 2,6-Dibromo-4-methylphenyl Croups... 

Norrish Type I cleavage of benzylketones occurs very readily to yield benzyl and acyl radicals. In competition with other processes, these can couple by attack of the acyl radical upon the aromatic nucleus of the benzyl radical to give as a product an acyl toluene derivative. Turro has examined the photochemical properties of the 2-phenylalkanones (326) in solution and complexed with cyclodextrins. In solution the major fate of the Type I biradicals formed is intr2unolecular recombination by attack of the acyl radical at the para position of the benzyl radical to generate (327). However, complexatlon of (326) within the cyclodextrin cavity inhibits formation of (327) and promotes disproportionation of the blradicals to give (328). Turro has also examined the photochemistry of dlbenzylketone Included in zeolites.Recombination of the Type I radicals in this case can produce a mixture of (2-methyl-phenyl) benzylketone and (4-methylphenyl)benzylketone decarbonylation of the acyl radical competes and leads to the isolation of 1,2-dlphenylethane. It is found that the relative yields of the products... 

The binaphthol host 10b was found to be very effective for enantiomeric separation of some sulfoxides. When a solution of 10b and two molar equivalents of rac-me-thyl m-methylphenyl sulfoxide (85c) in benzene-hexane was kept at room temperature for 12 h, a 1 1 complex of 10b and (-i-)-85c was obtained, after one recrystallization from benzene, as colorless prisms in 77% yield. Chromatography of the complex on sihca gel gave (-i-)-85c of 100% ee in 77% yield [32]. By the same procedure, rac-85d was separated by 10b to give (-i-)-85d of 100% ee in good yield. However, rac-85a was poorly separated with 10b, giving approximately 5% ee enantiomer, while 85b and 85e did not form complexes with 10b. In order to establish why the chirality of the m-substituted derivatives 85c and 85d is so precisely recognized by 10b, the crystal structure of the complex of 10b and (-i-)-85c was studied by X-ray analysis [33]. 

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