1. Zellner, C. N., U. S. 2,486,454-5-6 (11/1/49).
2. Genas, M., Fr. 958,178 (3/3/50).
3. Copenhaver, J. W., and Bigelow, M. H., “Acetylene and Carbon Monoxide Chemistry,” Reinhold, 1949, p. 159.
4. Edmed., J. Chem. Soc.,73, 627 (1898).
5. Logan, R. L., U. S. 2,625,558 (1/13/53).