***,formaldehyde freqency calculation basis=vdz gthresh,energy=1.d-8 geomtyp=xyz symmetry,nosym geometry={ 4 FORMALDEHYDE C 0.0000000000 0.0000000000 -0.5265526741 O 0.0000000000 0.0000000000 0.6555124750 H 0.0000000000 -0.9325664988 -1.1133424527 H 0.0000000000 0.9325664988 -1.1133424527 } hf;accu,14 optg;coord,3n; {frequencies,analytic thermo,sym=c2v print,thermo} mp2 optg;coord,3n {frequencies thermo,sym=c2v print,thermo}