memory 5000 mb

molecule c2h5oh {
C   1.1879 -0.3829  0.0000
C   0.0000  0.5526  0.0000
O  -1.1867 -0.2472  0.0000
H  -1.9237  0.3850  0.0000
H   2.0985  0.2306  0.0000
H   1.1184 -1.0093  0.8869
H   1.1184 -1.0093 -0.8869
H  -0.0227  1.1812  0.8852
H  -0.0227  1.1812 -0.8852
}

set{ basis aug-cc-pVDZ
reference uhf
roots_per_irrep [2,2]
}

energy('eom-ccsd')