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All results from a given calculation for C2H3NO3 (Oxamic acid)

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

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 2 yes H in 1A'

Conformer 1 (H out)

Jump to S1C2
Vibrational Frequencies calculated at QCISD(T)/6-31G*
Rotational Constants (cm-1) from geometry optimized at QCISD(T)/6-31G*
See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD(T)/6-31G*
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (H in)

Jump to S1C1
Energy calculated at QCISD(T)/6-31G*
 hartrees
Energy at 0K-357.539115
Energy at 298.15K-357.544263
Nuclear repulsion energy232.478965
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 QCISD(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
1 A' 3722 3570        
2 A' 3588 3442        
3 A' 3551 3406        
4 A' 1870 1794        
5 A' 1810 1736        
6 A' 1631 1564        
7 A' 1483 1423        
8 A' 1376 1320        
9 A' 1232 1182        
10 A' 1114 1068        
11 A' 809 776        
12 A' 622 597        
13 A' 547 525        
14 A' 415 398        
15 A' 284 273        
16 A" 775 744        
17 A" 732 702        
18 A" 661 634        
19 A" 443 425        
20 A" 324 311        
21 A" 106 102        

Unscaled Zero Point Vibrational Energy (zpe) 13547.1 cm-1
Scaled (by 0.9593) Zero Point Vibrational Energy (zpe) 12995.7 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 QCISD(T)/6-31G*
ABC
0.18787 0.12566 0.07530

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.009 -0.793 0.000
C2 0.000 0.748 0.000
O3 -1.078 1.351 0.000
O4 1.031 -1.453 0.000
O5 -1.232 -1.298 0.000
N6 1.233 1.288 0.000
H7 1.345 2.294 0.000
H8 2.042 0.676 0.000
H9 -1.835 -0.517 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 O4 O5 N6 H7 H8 H9
C11.54162.40401.21601.33932.41433.36432.50841.8641
C21.54161.23532.43022.38861.34582.04922.04282.2285
O32.40401.23533.50812.65362.31222.60063.19202.0148
O41.21602.43023.50812.26742.74783.76002.35683.0142
O51.33932.38862.65362.26743.57244.42113.82270.9873
N62.41431.34582.31222.74783.57241.01281.01373.5590
H73.36432.04922.60063.76004.42111.01281.76144.2441
H82.50842.04283.19202.35683.82271.01371.76144.0557
H91.86412.22852.01483.01420.98733.55904.24414.0557

picture of Oxamic acid state 1 conformation 2
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 O3 119.521 C1 C2 N6 113.304
C1 O5 H9 105.492 C2 C1 O4 123.160
C2 C1 O5 111.829 C2 N6 H7 119.988
C2 N6 H8 119.278 O3 C2 N6 127.176
O4 C1 O5 125.011 H7 N6 H8 120.734
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability