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All results from a given calculation for C4H4N2O2 (Uracil)

using model chemistry: B3LYP/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3LYP/6-31G(2df,p)
 hartrees
Energy at 0K-414.849322
Energy at 298.15K-414.856359
HF Energy-414.849322
Nuclear repulsion energy356.608637
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 B3LYP/6-31G(2df,p)
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' 3653 3526 96.06      
2 A' 3611 3484 58.85      
3 A' 3254 3140 0.55      
4 A' 3207 3095 4.00      
5 A' 1839 1775 518.80      
6 A' 1803 1740 572.08      
7 A' 1682 1623 80.46      
8 A' 1495 1443 96.81      
9 A' 1417 1368 11.14      
10 A' 1401 1352 109.83      
11 A' 1375 1327 19.32      
12 A' 1228 1185 5.49      
13 A' 1193 1151 82.46      
14 A' 1087 1049 6.65      
15 A' 989 954 5.83      
16 A' 961 928 5.96      
17 A' 770 743 2.48      
18 A' 558 539 4.05      
19 A' 540 521 6.00      
20 A' 516 498 20.10      
21 A' 385 372 20.35      
22 A" 974 940 0.19      
23 A" 826 797 55.22      
24 A" 774 746 37.66      
25 A" 740 714 12.73      
26 A" 693 669 67.68      
27 A" 566 547 40.73      
28 A" 400 386 22.34      
29 A" 169 163 0.31      
30 A" 151 146 1.02      

Unscaled Zero Point Vibrational Energy (zpe) 19128.9 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 18459.4 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 B3LYP/6-31G(2df,p)
ABC
0.12986 0.06723 0.04430

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.268 0.390 0.000
C2 1.233 -1.062 0.000
N3 0.000 0.995 0.000
C4 0.054 -1.704 0.000
O5 2.281 1.069 0.000
N6 -1.140 -1.022 0.000
C7 -1.225 0.363 0.000
O8 -2.293 0.946 0.000
H9 2.180 -1.579 0.000
H10 -0.039 2.004 0.000
H11 -0.025 -2.785 0.000
H12 -2.026 -1.498 0.000

Atom - Atom Distances (Å)
  C1 C2 N3 C4 O5 N6 C7 O8 H9 H10 H11 H12
C11.45231.40522.42091.21902.79152.49323.60442.17022.07633.42873.7969
C21.45232.39831.34332.37412.37322.84114.05781.07893.31872.13403.2882
N31.40522.39832.69952.28212.31701.37842.29353.37341.00903.78043.2125
C42.42091.34332.69953.55651.37402.43003.53942.13033.70841.08412.0893
O51.21902.37412.28213.55654.00903.57614.57562.64982.50094.49125.0136
N62.79152.37322.31701.37404.00901.38762.28133.36613.21972.08561.0059
C72.49322.84111.37842.43003.57611.38761.21713.91982.02443.36882.0260
O83.60444.05782.29353.53944.57562.28131.21715.13662.49004.36622.4586
H92.17021.07893.37342.13032.64983.36613.91985.13664.21412.51354.2066
H102.07633.31871.00903.70842.50093.21972.02442.49004.21414.78864.0260
H113.42872.13403.78041.08414.49122.08563.36884.36622.51354.78862.3788
H123.79693.28823.21252.08935.01361.00592.02602.45864.20664.02602.3788

picture of Uracil state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C4 119.934 C1 C2 H9 117.280
C1 N3 C7 127.191 C1 N3 H10 117.704
C2 C1 N3 114.122 C2 C1 O5 125.205
C2 C4 N6 121.702 C2 C4 H11 122.715
N3 C1 O5 120.673 N3 C7 N6 113.787
N3 C7 O8 124.062 C4 C2 H9 122.786
C4 N6 C7 123.263 C4 N6 H12 122.020
N6 C4 H11 115.583 N6 C7 O8 122.151
C7 N3 H10 115.105 C7 N6 H12 114.716
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability