Val, 43, No. 6
I N D U S T R I A L A N D E N G I N E E R I N G CHEMISTRY
1418
ethylene-nickel complex. Further work has shown that metal catalysts, having interatomic spacings between 2.4 and 2.8 A., can effect two-point adsorption of ethylene. This group included nickel, cobalt, copper, platinum, and palladium, all of which can be used for the hydrogenation of olefinic double bonds. Additional evidence in support of the importance of geometric factors in determining catalytic activity may be found in the
I.
H-C-
/
2.
ir
3.
H -C-C-H
H-C-C-H
i ti
H-C
H-C
C
