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Single crystals of Cr(CO). have been doped with 0.05% Fe(CO), and r irradiated at 77 K. The irradiated crystals revealed EPR spectra at 95 K of a species identified as Fe(CO); , present in two modifications A and B. Using Fe(CO), enriched in the isotope 13C, the hyperfine tensors of the five carbon atoms of A were obtained; the unique lJC had all = 21 G and a, = 18 G; the other four had all = 6.6 G and a, = 9.0 G. Measurement of the "Fe hyperfine interaction indicated the presence of a single Fe nucleus with all = 10 G and a, = 6 G. The two modifiactions A and B correspond to Fe(CO)t molecules in which the unique Fe-C bond is parallel to Cr-C(J,2) or Cr-C(3,4,5,6) bonds, respectively, in the pure Cr(CO). crystal.

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A mathematical model for the removal of volatile organics from water by aeration and by solvent sublation into an organic phase is presented. The model includes the effect of the finite rate of solute mass transfer from the aqueous into the vapor phase.Results are calculated for the removal of I , 1,l -trichloroethane (TCE) chloroform, and benzene from water with I-octanol, anisole, or kerosene as the organic phase. Experimental data on the aeration of TCE and on its solvent sublation into I-octanol are in good agreement with the model. Small bubbles and long water columns greatly reduce the inefficiency of the process caused by mass transfer rate limitations.