return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for H2OH2CO (water formaldehyde dimer)

using model chemistry: MP3=FULL/6-31+G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at MP3=FULL/6-31+G**
 hartrees
Energy at 0K-190.454509
Energy at 298.15K 
HF Energy-189.911444
Nuclear repulsion energy68.767416
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at MP3=FULL/6-31+G**
Rotational Constants (cm-1) from geometry optimized at MP3=FULL/6-31+G**
See section I.F.4 to change rotational constant units
Geometric Data calculated at MP3=FULL/6-31+G**

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 1.120 -0.449 -0.126
O2 1.880 0.140 -0.079
O3 -0.963 -0.678 -0.007
H4 2.426 -0.187 0.637
C5 -1.318 0.480 0.020
H6 -0.595 1.303 0.016
H7 -2.380 0.756 0.043

Atom - Atom Distances (Å)
  H1 O2 O3 H4 C5 H6 H7
H10.96282.09861.53542.61342.45553.7057
O20.96282.95890.95853.21802.73594.3064
O32.09862.95893.48431.21102.01462.0165
H41.53540.95853.48433.85333.42524.9341
C52.61343.21801.21103.85331.09631.0974
H62.45552.73592.01463.42521.09631.8680
H73.70574.30642.01654.93411.09741.8680

picture of water formaldehyde dimer state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H1 O2 H4 106.105 H1 O3 C5 100.880
O2 H1 O3 147.924 O3 C5 H6 121.573
O3 C5 H7 121.668 H6 C5 H7 116.757
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability