... M. S. New- man, ibid., 72, 4783 (19BO), and MS Newman, “Steric Effects in Organic Chemistry,” John Wiley ... 180-200" with 2 g. of copper powder (Copper Metal, precipitated powder, JT Baker Chemical Co., Phillips ... S. Xewman and R. I. Harper, Jr., Tms JOURNAL, 80, 6353 (1958 ...