10.07.2015 Views

Catalysis of Organic..

Catalysis of Organic..

Catalysis of Organic..

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

Woods et al. 495Effect <strong>of</strong> oxidation state and solventSeveral factors can influence the effectiveness <strong>of</strong> a metal scavenger, one <strong>of</strong> which isthe oxidation state <strong>of</strong> the metal. In these studies the removal <strong>of</strong> Pd(II) as trans-di(µacetato)bis[o-(di-o-tolylphosphino)benzyl]dipalladium(II)(3) and Pd(0) as tetrakis-(triphenylphosphine)palladium(0) (4) was investigated.3 4In pilot scale studies, a 30 in column was packed with 400 mL <strong>of</strong> Deloxan ® THPII or Deloxan ® MP (Figure 1a). A dimethylformamide (DMF) solution containingeither 62.5 ppm or 71.0 ppm <strong>of</strong> both Pd(II) and Pd(0) as 3 and 4 was passed throughthe column at 4 EBV’s (empty bed volumes) per hour at room temperature.Figure 1 (a) Illustration <strong>of</strong> pilot column used in this study; (b) Illustration <strong>of</strong> labscalesetup

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!