Aqua 2,6-Bis

Binaphthalene)-2,2 -diylbis(diphenylphosphine-/cP)]trifluorome-thanesulfonato-/cO-silver Chloro( ) -cyclopentadienyl)[(47J( fra/js)-2,2-dimethylQ, Q ,Q, ei -tetraphenyl-1,3-dioxo-lane-4,5-di-methanolato(2-)-Ch , QV] titanium 2,2-dimethyl-Q, Q ,Q, Qr"-tetraphenyl- l,3-Dioxolane-4,5-dimethanolatotitanium diisopro-poxide chloro(cyclopentadienyl)bis[3- 0-( 1,2 5,6-di- O-isopro-pylidene-a -D-glucofuranosyl)]titanium 2,2 -Methylenebis-[(45,5/ )-4,5-dihydro-4,5-diphenyloxazole-/cT S] bis(trifluoro-methanesulfonato-/cO-zmc Aqua] 2,6-bis[(45)-4,5-dihydro-4-... 

C3BH4BB2CU4F14Ng03Si 0.84 H2O, Aqua-(2,6-bis(N-(2-(4 imidazolyl)-ethyl)iminomethyl)-4-methylphenol) (/i-2-hydroxo)dicopper(II) dimer tetrafluoroborate silicon hexafluoride hydrate, 46B, 1196 C38H48C0N2O4 0.5 CyHB, (3,5-Di-tert-butylcatecholato)(3,5-di-tert-butylsemiquinone)(bipyridyl)cobalt(III) toluene solvate, 46B, 1160 C3bH5i,Cu2N,o025P2/ (Uridine 5 -monophosphate)-2,2 -dipyridylamine-copper(II) pentahydrate, 44B, 1013... 

Reaction of Cytochrome cIinn with Bis(ferrozine)copper(II) Knowledge of the redox properties of cytochrome c was an encouragement to initiate a kinetics investigation of the reduction of an unusual copper(II) complex species by cyt c11. Ferrozine (5,6-bis(4-sulphonatophenyl)-3-(2-pyridyl)-1,2.4-triazine)286 (see Scheme 7.1), a ligand that had come to prominence as a sensitive spectrophotometric probe for the presence of aqua-Fe(II),19c,287 forms a bis complex with Cu(II) that is square pyramidal, with a water molecule in a fifth axial position, whereas the bis-ferrozine complex of Cu(I) is tetrahedral.286 These geometries are based primarily upon analysis of the UV/visible spectrum. Both complexes are anionic, as for the tris-oxalato complex of cobalt in reaction with cytochrome c (Section 7.3.3.4), the expectation is that the two partners will bind sufficiently strongly in the precursor complex to allow separation of the precursor formation constant from the electron transfer rate constant, from the empirical kinetic data. 

Effect of Pressure on Proton-Coupled Electron Transfer Reactions of Seven-Coordinate Iron Complexes in Aqueous Solution It has been shown that seven-coordinate Fe(III) diaqua complexes consisting of a pentaaza macrocyclic ligand possess superoxide dismutase (SOD) activity, and therefore could serve an imitative SOD function.360 Choosing appropriate chemical composition of a chelate system yielded suitable pKa values for the two coordinated water molecules so that the Fe(III) complexes of 2,6-diacetylpyridine-bis(semicarbazone) (dapsox) and 2,6-diacetylpyridine-bis(semioxamazide) (dapsc) (see Scheme 7.12) would be present principally in the highly active aqua-hydroxo form in solution at physiological pH.361... 

RuF,NsO gS3C H2i - 3H20, Ruthenium(UI), aqua(2,2 -bipyridine-N, Af )(2,2 6, 2 terpy ridine-M N, N" )tris( trifluoromethanesulfonate), trihydrate, 24 304 RuF,N,S3C3H, Ruthenium(III), pentaam-mine(trifluoromethanesulfonato-O)-, bis(trifluoromethanesulfonate), 24 258 RuFnNgPjCsoHig, Ruthenium(II), tris(2,2 -bipyridine)-... 

Di(terf-butyl)phenol (23) underwent catalytic oxygenation with aqua[iV,iV -bis(2 -pyridinecarboxamido)-l,2-benzene]cobalt (II) (234) in DMF or DMSO (room temp., 1 h) to afford the corresponding quinone 74 in 100% yield The metal complex 234 shows high selectivity and ability to work under mild conditions stirring at room temperature under an atmosphere of molecular oxygen . ... 

The (2,2 -bipyridine-A(,A( )(2,2 6 2"-terpyridine-A(,yV, yV"),(bpy)(trpy) complexes of ruthenium and osmium, like the bis(2,2 -bipyridine-A(,N ) series, were first studied by Dwyer and coworkers " and are interesting because more than one oxidation state is substitution inert. More recently, these (bpy)(trpy) species have generated interest because the M(IV) oxo complexes are useful oxidants of organic molecules. " The (bpy)(trpy) series of complexes have also proved useful in the study of the redox chemistry of coordinated ligands. The (bpy)(trpy) and bis(bpy) complexes containing the coordinated trifluoromethanesulfonato (triflato) ligands are useful precursors to a variety of complexes. The syntheses of these species and the aqua complexes derived from them are reported here. 

Kanemasa et al. discovered an asymmetric Diels-Alder reaction of acryloyl-oxazolidi-none and cyclopentadiene catalyzed by a chiral aqua complex of 4,6-dibenzofurani-dyl-2,2 -bis(4-phenyloxazoline) 16 (vide infra) [22]. Unlike the Diels-Alder reaction of acryloyloxazolidinone, for which NiBr2/AgC104 and Znl2/AgC104 are the most suitable sources of the central metal, the best for the Diels-Alder reaction of a-bromo-... 

Aqua-K(18-crown-6) salt of [-Rh2(-henzoate)4-NCFe(CN)4CN-] . tn = l,3-diaminopropane. Contains Cu4Fe3 (defect) cubane units. hehct = 3,10-Bis(2-hydroxyethyl)-l,3,5,8,10,12-hexaazacyclotetradecane (38). Prepared from [Ni(cyclam)] plus a... 

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