%mem=850MB
#p oniom(b3lyp/gen:uff) opt freq 

Title Card Required

0 1 0 1 0 1
 C-C_2            0   -0.23157700    0.44976900    0.00000000 H
 H-H_             0   -0.36056000    1.51196600    0.00000000 H
 C-C_3            0    1.18638800   -0.15104200    0.00000000 L H-H_ 1
 H-H_             0    1.90836400    0.63867400    0.00000000 L
 H-H_             0    1.31800600   -0.75462200    0.87365200 L
 H-H_             0    1.31800500   -0.75462500   -0.87365100 L
 O-O_2            0   -1.23908500   -0.30421900    0.00000000 H

H 0
6-31g**
****
C 0 
6-31g**
****
O 0
6-31g**
****