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All results from a given calculation for C4H4N2O2 (Uracil)

using model chemistry: MP2/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/6-31G*
 hartrees
Energy at 0K-413.632589
Energy at 298.15K-413.639476
HF Energy-412.463960
Nuclear repulsion energy355.371256
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 MP2/6-31G*
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' 3657 3448 121.86      
2 A' 3613 3407 76.41      
3 A' 3306 3118 1.41      
4 A' 3265 3079 3.86      
5 A' 1864 1758 663.01      
6 A' 1822 1718 416.41      
7 A' 1710 1613 21.21      
8 A' 1533 1446 135.09      
9 A' 1447 1364 73.32      
10 A' 1436 1354 42.22      
11 A' 1411 1330 9.79      
12 A' 1270 1198 3.48      
13 A' 1236 1165 101.82      
14 A' 1112 1049 9.29      
15 A' 999 942 6.54      
16 A' 989 933 8.18      
17 A' 782 738 2.65      
18 A' 561 529 4.31      
19 A' 541 510 3.69      
20 A' 518 488 17.45      
21 A' 383 361 21.63      
22 A" 920 867 3.66      
23 A" 787 742 58.55      
24 A" 725 684 67.96      
25 A" 709 669 95.08      
26 A" 686 647 11.67      
27 A" 559 527 56.27      
28 A" 371 350 32.93      
29 A" 159 150 1.08      
30 A" 134 126 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 19251.6 cm-1
Scaled (by 0.943) Zero Point Vibrational Energy (zpe) 18154.3 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 MP2/6-31G*
ABC
0.12926 0.06666 0.04398

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.272 0.389 0.000
C2 1.237 -1.063 0.000
N3 0.000 0.990 0.000
C4 0.054 -1.709 0.000
O5 2.296 1.073 0.000
N6 -1.141 -1.022 0.000
C7 -1.231 0.362 0.000
O8 -2.307 0.955 0.000
H9 2.185 -1.584 0.000
H10 -0.038 2.004 0.000
H11 -0.023 -2.791 0.000
H12 -2.033 -1.500 0.000

Atom - Atom Distances (Å)
  C1 C2 N3 C4 O5 N6 C7 O8 H9 H10 H11 H12
C11.45301.40652.42621.23102.79592.50323.62382.17382.07913.43433.8070
C21.45302.39691.34842.38382.37932.85054.07901.08063.32162.13913.2997
N31.40652.39692.69892.29732.31301.38182.30773.37551.01493.78093.2141
C42.42621.34842.69893.57281.37832.43703.55942.13453.71371.08522.0973
O51.23102.38382.29733.57284.02543.59784.60472.65882.51274.50665.0358
N62.79592.37932.31301.37834.02541.38712.29523.37313.22092.09291.0116
C72.50322.85051.38182.43703.59781.38711.22873.93092.02943.37682.0273
O83.62384.07902.30773.55944.60472.29521.22875.15962.50014.38762.4698
H92.17381.08063.37552.13452.65883.37313.93095.15964.22012.51644.2186
H102.07913.32161.01493.71372.51273.22092.02942.50014.22014.79514.0318
H113.43432.13913.78091.08524.50662.09293.37684.38762.51644.79512.3892
H123.80703.29973.21412.09735.03581.01162.02732.46984.21864.03182.3892

picture of Uracil state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C4 119.968 C1 C2 H9 117.432
C1 N3 C7 127.732 C1 N3 H10 117.406
C2 C1 N3 113.898 C2 C1 O5 125.087
C2 C4 N6 121.515 C2 C4 H11 122.668
N3 C1 O5 121.014 N3 C7 N6 113.304
N3 C7 O8 124.150 C4 C2 H9 122.600
C4 N6 C7 123.583 C4 N6 H12 121.952
N6 C4 H11 115.817 N6 C7 O8 122.546
C7 N3 H10 114.862 C7 N6 H12 114.466
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability