III Tetrafluoroborate

The aqua complex closely resembles the acetone complex described above. The chief distinguishing features are a triplet resonance at — 29.8 5 [2 Ji M) = 16 Hz], an HzO resonance at 2.4 5, and a v(lr H) vibration in the IR at 2280cm 1(w). The HzO vibrations appear at 3650 (m) and 1610cm-1 (m). 

2-DIIODOBENZENE)DIHYDRIDOBIS(TRIPHENYL-PHOSPHINE)IRIDIUM(III) TETRAFLUOROBORATE(l -) 

The complex can be identified from the JH NMR resonace at — 16.5 5 [triplet 2J(p h) = 13 Hz] and by the IR absorption at 2217cm-1(w). It has been characterized crystallographically6 and has normal Ir—I covalent bonds [2.726(2) and 2.745(1)A]. More recently the analogous bis(iodomethane) complex6 has also been crystallographically characterized.15 

We thank the Petroleum Research Fund (M. F. M.) and National Science Foundation (J. M. M.) for funding, and Professor J. W. Faller and Dr. Brigitte Segmuller for performing the crystal structures of the complexes in Sections B and D. 

Araneo, S. Martinengo, and P. Pasquale, Rend. 1st. Lomb. Sci. Lett. Parte Sen. Atti. Uffi., 99, 797 (1965). 

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Preparation by oxidising tris(phenanthroline)cobalt(III) tetrafluoroborate with nitric acid in sulfuric acid with potassium bromide catalysis is potentially explosive. See Nitric acid... 

Dihydridobis(Solvent)Bis( Triphenyl-Phosphine)Iridium(III) Tetrafluoroborates 125... 

Cyclopentadienylbenzeneiridium(III) tetrafluoroborate [7T-C5H5)Ir(7r-C6Hg)](BF4)2 (complex 1.12) was completely inactive in oxidation with hydrogen peroxide and ferf-butyl hydroperoxide but exhibited a moderate activity in oxidation with m-chloroperoxybenzoic acid at room temperature [15b]. The H2O2-I.12 system showed a moderate activity in the oxidation of secondary alcohols. For example, cyclohexanol was oxidized at room temperature to cyclohexanone (30% yield for 6 h) when a fourfold excess of PCA as a cocatalyst was added to the reaction solution. 

C22H30MO2N2O3S6 0.25 C3H6O, M Oxo-di-M-thiophenolato-bis(N,N-di-ethyldithiocarbamato-oxo-molybdenum acetone solvate, 43B, 1205 C22H40BF4N4O2RU2S8, M Bis(N,N-diethyldithiocarbamato)-bis(N,N-diethyldithi ocarbamato)dicarbonyldiruthenium( 11, III) tetrafluoroborate, 46B, 999... 

C2aHii8N4S82n2, Zinc hexamethylenedithiocarbamate dimer, 38B, 870 C28H53N2PPtSft CgHi2 r Bis(N t-butyIdithiocarbamato)(tricyclohexyl-phosphine )platinum( 11) cyclohexane solvate, 45B, 1093 C2 8H5 6BF4N5ORU2S10 f Bis(N,N-diethyldithiocarbamato)-M tris(N,N-di-ethyldithiocarbamato)diruthenium(III) tetrafluoroborate acetone solvate, 42B, 775... 

DIHYDRIDOBIS(SOLVENT)BIS(TRIPHENYL-PHOSPHINE)IRIDIUM(III)TETRAFLUOROBORATES... 

In the case of ( )-phenylvinyl(aryl)iodine(III) tetrafluoroborates 36, nucleophilic substitution can occur via a at least two pathways. The reaction of 36 with acetic acid proceeds to give a mixture of ( )- and (Z)- acetates 37 and 38 with the retention of configuration product 37 being the major product (Scheme 25). 

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