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

using model chemistry: CBS-Q

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 CBS-Q
Rotational Constants (cm-1) from geometry optimized at CBS-Q
See section I.F.4 to change rotational constant units
Geometric Data calculated at CBS-Q
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability

Conformer 2 (H in)

Jump to S1C1
Energy calculated at CBS-Q
 hartrees
Energy at 0K-358.014389
Energy at 298.15K-358.020336
Nuclear repulsion energy236.544225
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 CBS-Q
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A' 4000 4000 163.51      
2 A' 3974 3974 99.94      
3 A' 3845 3845 93.24      
4 A' 2078 2078 254.65      
5 A' 1978 1978 601.83      
6 A' 1798 1798 91.55      
7 A' 1605 1605 173.72      
8 A' 1466 1466 552.88      
9 A' 1321 1321 13.01      
10 A' 1216 1216 0.39      
11 A' 889 889 10.40      
12 A' 689 689 24.74      
13 A' 596 596 3.59      
14 A' 450 450 6.50      
15 A' 304 304 38.99      
16 A" 926 926 0.04      
17 A" 720 720 183.84      
18 A" 697 697 14.41      
19 A" 528 528 204.65      
20 A" 425 425 172.97      
21 A" 110 110 7.00      

Unscaled Zero Point Vibrational Energy (zpe) 14807.3 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 14807.3 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 CBS-Q
ABC
0.18924 0.12603 0.07565

See section I.F.4 to change rotational constant units
Geometric Data calculated at CBS-Q

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.002 -0.792 0.000
C2 0.000 0.747 0.000
O3 -1.046 1.330 0.000
O4 0.997 -1.423 0.000
O5 -1.204 -1.296 0.000
N6 1.217 1.286 0.000
H7 1.317 2.275 0.000
H8 2.021 0.703 0.000
H9 -1.845 -0.595 0.000

Atom - Atom Distances (Å)
  C1 C2 O3 O4 O5 N6 H7 H8 H9
C11.53932.36601.17831.30712.40723.33652.51221.8576
C21.53931.19672.38872.37211.33092.01642.02152.2819
O32.36601.19673.42782.63092.26302.54423.13002.0842
O41.17832.38873.42782.20422.71853.71182.36012.9602
O51.30712.37212.63092.20423.53994.37103.79440.9505
N62.40721.33092.26302.71853.53990.99340.99343.5940
H73.33652.01642.54423.71184.37100.99341.72254.2700
H82.51222.02153.13002.36013.79440.99341.72254.0783
H91.85762.28192.08422.96020.95053.59404.27004.0783

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 119.185 C1 C2 N6 113.810
C1 O5 H9 109.730 C2 C1 O4 122.479
C2 C1 O5 112.638 C2 N6 H7 119.635
C2 N6 H8 120.155 O3 C2 N6 127.006
O4 C1 O5 124.883 H7 N6 H8 120.210
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability