... (18) T. Attenburrow et al., J. ChenL. Soc., 1094 (1952). [CONTRIBUTION FROM THE DEPARTMENT OF CHEMISTRY, UNIVERSITY OF COLORADO] ... Found: C, 35.6; H, 3.85. (9) DD Coffman, P. I,. Barrick, RD Cramer, and MS Raasch, J. Am. Chem. SOC., 71, 490 (1949). ...