memory 1000 gb
molecule E2butene {
0 1
    C            0.330315020705     0.579559833091     0.000000000000
    C           -0.330315020705    -0.579559833091     0.000000000000
    C           -0.319563271336     1.924566589374     0.000000000000
    C            0.319563271336    -1.924566589374     0.000000000000
    H            1.415758048540     0.554056706132     0.000000000000
    H           -1.415758048540    -0.554056706132     0.000000000000
    H           -1.403521188651     1.832528579393     0.000000000000
    H            1.403521188651    -1.832528579393     0.000000000000
    H           -0.026010924532     2.502610652545     0.875810227452
    H           -0.026010924532     2.502610652545    -0.875810227452
    H            0.026010924532    -2.502610652545     0.875810227452
    H            0.026010924532    -2.502610652545    -0.875810227452
}
# mp2 settings
set scf_type df
set mp2_type df
set cc_type df
set freeze_core true
# convergence
set g_convergence GAU_TIGHT
set e_convergence 8
set d_convergence 8
set DYNAMIC_LEVEL 1
#set basis aug-cc-pvtz
#optimize('ccsd(t)')
#frequencies('ccsd(t)')
set points 5
optimize('mp2/cc-pv([q5]+d)z + D:ccsd(t)/cc-pvtz')
frequencies('mp2/cc-pv([q5]+d)z + D:ccsd(t)/cc-pvtz',dertype='gradient')