return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for C4H4N2O2 (Uracil)

using model chemistry: BLYP/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 BLYP/6-31G*
 hartrees
Energy at 0K-414.710912
Energy at 298.15K-414.717644
HF Energy-414.710912
Nuclear repulsion energy352.147939
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 BLYP/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' 3526 3498 70.07      
2 A' 3489 3461 39.77      
3 A' 3183 3157 0.40      
4 A' 3140 3115 7.11      
5 A' 1767 1753 483.84      
6 A' 1725 1711 466.91      
7 A' 1623 1610 53.09      
8 A' 1453 1441 60.83      
9 A' 1382 1371 1.15      
10 A' 1350 1339 58.34      
11 A' 1330 1319 86.94      
12 A' 1200 1191 19.18      
13 A' 1135 1126 67.00      
14 A' 1052 1043 4.27      
15 A' 957 949 4.84      
16 A' 924 917 9.13      
17 A' 741 735 2.15      
18 A' 536 532 4.00      
19 A' 519 515 7.29      
20 A' 501 497 17.73      
21 A' 368 365 17.00      
22 A" 919 911 0.28      
23 A" 780 774 50.19      
24 A" 707 701 31.41      
25 A" 700 695 24.95      
26 A" 668 663 79.84      
27 A" 541 537 41.41      
28 A" 379 376 25.72      
29 A" 164 163 0.52      
30 A" 137 136 0.18      

Unscaled Zero Point Vibrational Energy (zpe) 18448.7 cm-1
Scaled (by 0.9919) Zero Point Vibrational Energy (zpe) 18299.3 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 BLYP/6-31G*
ABC
0.12710 0.06534 0.04316

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 1.296 0.402 0.000
C2 1.251 -1.076 0.000
N3 0.000 0.995 0.000
C4 0.054 -1.724 0.000
O5 2.312 1.091 0.000
N6 -1.152 -1.036 0.000
C7 -1.254 0.368 0.000
O8 -2.327 0.961 0.000
H9 2.198 -1.610 0.000
H10 -0.025 2.015 0.000
H11 -0.034 -2.813 0.000
H12 -2.040 -1.531 0.000

Atom - Atom Distances (Å)
  C1 C2 N3 C4 O5 N6 C7 O8 H9 H10 H11 H12
C11.47891.42502.46211.22772.83852.54963.66562.20512.08473.47893.8553
C21.47892.41931.36052.41302.40282.89064.11691.08763.34402.15993.3217
N31.42502.41932.71952.31412.33421.40162.32723.40831.02053.80783.2467
C42.46211.36052.71953.60851.38902.46713.58902.14683.74001.09222.1031
O51.22772.41302.31413.60854.06443.63824.64082.70332.51314.55425.0807
N62.83852.40282.33421.38904.06441.40682.31663.39883.25192.09991.0170
C72.54962.89061.40162.46713.63821.40681.22653.97812.05503.40642.0551
O83.66564.11692.32723.58904.64082.31661.22655.20442.53184.41602.5085
H92.20511.08763.40832.14682.70333.39883.97815.20444.25242.53524.2387
H102.08473.34401.02053.74002.51313.25192.05502.53184.25244.82784.0785
H113.47892.15993.80781.09224.55422.09993.40644.41602.53524.82782.3807
H123.85533.32173.24672.10315.08071.01702.05512.50854.23874.07852.3807

picture of Uracil state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C4 120.197 C1 C2 H9 117.648
C1 N3 C7 128.842 C1 N3 H10 115.984
C2 C1 N3 112.828 C2 C1 O5 125.880
C2 C4 N6 121.828 C2 C4 H11 123.067
N3 C1 O5 121.292 N3 C7 N6 112.431
N3 C7 O8 124.492 C4 C2 H9 122.155
C4 N6 C7 123.873 C4 N6 H12 121.105
N6 C4 H11 115.105 N6 C7 O8 123.076
C7 N3 H10 115.175 C7 N6 H12 115.022
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.568      
2 C -0.191      
3 N -0.615      
4 C 0.105      
5 O -0.474      
6 N -0.569      
7 C 0.695      
8 O -0.466      
9 H 0.135      
10 H 0.329      
11 H 0.152      
12 H 0.331      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -1.192 -3.918 0.000 4.095
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -55.596 1.741 0.000
y 1.741 -37.409 0.000
z 0.000 0.000 -45.319
Traceless
 xyz
x -14.232 1.741 0.000
y 1.741 13.048 0.000
z 0.000 0.000 1.184
Polar
3z2-r22.367
x2-y2-18.187
xy1.741
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 12.398 0.368 0.000
y 0.368 9.927 0.000
z 0.000 0.000 3.515


<r2> (average value of r2) Å2
<r2> 237.062
(<r2>)1/2 15.397