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All results from a given calculation for H2OHCOOH (Water formic acid dimer 2)

using model chemistry: CCSD(T)/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at CCSD(T)/6-31G*
 hartrees
Energy at 0K-265.485602
Energy at 298.15K-265.489774
HF Energy-264.776688
Counterpoise corrected energy 
CP Energy at 298.15K 
Counterpoise optimized geometry corrected energy 
CP opt. Energy at 298.15K 
Nuclear repulsion energy116.879553
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 CCSD(T)/6-31G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
18 A 3830 3685        
17 A 3705 3565        
16 A 3658 3519        
15 A 3160 3040        
14 A 1813 1744        
13 A 1762 1695        
12 A 1427 1373        
11 A 1354 1303        
10 A 1169 1125        
9 A 1082 1041        
8 A 712 685        
7 A 635 611        
6 A 550 529        
5 A 279 269        
4 A 197 189        
3 A 174 168        
2 A 111 106        
1 A 97 94        

Unscaled Zero Point Vibrational Energy (zpe) 12857.1 cm-1
Scaled (by 0.9621) Zero Point Vibrational Energy (zpe) 12369.8 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at CCSD(T)/6-31G*
ABC
0.73646 0.09444 0.08430

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)/6-31G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 -1.787 0.445 -0.137
O2 -2.408 -0.306 -0.090
O3 0.223 0.971 0.001
H4 -2.854 -0.188 0.764
C5 0.654 -0.169 -0.001
O6 1.964 -0.483 0.011
H7 0.030 -1.070 -0.013
H8 2.454 0.367 0.017

Atom - Atom Distances (Å)
  H1 O2 O3 H4 C5 O6 H7 H8
H10.97512.08241.53292.52143.86712.36874.2448
O20.97512.92540.97103.06634.37612.55504.9091
O32.08242.92543.37511.21912.26862.05042.3117
H41.53290.97103.37513.59094.88523.11375.3889
C52.52143.06631.21913.59091.34661.09681.8777
O63.86714.37612.26864.88521.34662.02180.9812
H72.36872.55502.05043.11371.09682.02182.8186
H84.24484.90912.31175.38891.87770.98122.8186

picture of Water formic acid dimer 2 state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H1 O2 H4 103.938 H1 O3 C5 96.049
O2 H1 O3 143.654 O3 C5 O6 124.230
O3 C5 H7 124.510 C5 O6 H8 106.481
O6 C5 H7 111.260
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