ient Magnetic Filtration of Small Particles of Ferro-, Ferri-, and Paramagnetic Catalysts and Catalyst Supports", Hill, C. L., Lamotte, A., Althoff, W., Brunie, 3. C. and Whitesides, G. M., J. Cat., 1976, 43, 53-60. 77. "Convenient Preparations of a 1,2,3,4,5-Pentamethylcyclopentadiene and 1-Ethyl-2,3,4,5