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 C4H6N2 (1H-Imidazole, 2-methyl-)

using model chemistry: MP2/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/6-311G*
 hartrees
Energy at 0K-264.787472
Energy at 298.15K-264.795175
HF Energy-263.906703
Nuclear repulsion energy224.553568
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 MP2/6-311G*
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 3691 3507 54.03      
2 A 3306 3141 3.15      
3 A 3280 3117 4.50      
4 A 3200 3041 3.54      
5 A 3146 2990 17.57      
6 A 3075 2922 27.94      
7 A 1597 1518 33.49      
8 A 1545 1468 0.49      
9 A 1520 1444 10.40      
10 A 1514 1439 2.91      
11 A 1473 1400 43.46      
12 A 1447 1375 1.76      
13 A 1418 1347 0.05      
14 A 1304 1239 15.21      
15 A 1210 1150 2.36      
16 A 1141 1084 17.54      
17 A 1127 1071 13.18      
18 A 1072 1019 0.42      
19 A 1013 963 10.02      
20 A 980 931 1.97      
21 A 928 881 3.16      
22 A 799 759 27.28      
23 A 696 661 27.69      
24 A 684 650 1.19      
25 A 667 634 14.70      
26 A 639 607 37.48      
27 A 520 495 62.32      
28 A 347 330 5.35      
29 A 242 230 5.86      
30 A 76 72 0.23      

Unscaled Zero Point Vibrational Energy (zpe) 21826.8 cm-1
Scaled (by 0.9503) Zero Point Vibrational Energy (zpe) 20742.0 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 MP2/6-311G*
ABC
0.29502 0.12006 0.08672

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-311G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 2.110 -0.022 0.000
H2 2.501 0.488 0.886
H3 2.482 -1.046 -0.001
H4 2.501 0.490 -0.885
N5 -0.166 1.053 0.000
H6 0.157 2.008 -0.000
C7 0.619 -0.071 -0.000
N8 -0.121 -1.169 -0.000
C9 -1.427 -0.730 0.000
H10 -2.252 -1.429 0.000
C11 -1.482 0.647 -0.000
H12 -2.301 1.351 0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 N5 H6 C7 N8 C9 H10 C11 H12
C11.09441.08951.09442.51692.81681.49192.50903.60774.58373.65374.6202
H21.09441.77191.77082.86652.93122.15403.22604.20745.20134.08344.9594
H31.08951.77191.77193.37883.83812.10282.60633.92224.74984.31035.3503
H41.09441.77081.77192.86592.92972.15403.22674.20785.20204.08324.9589
N52.51692.86653.37882.86591.00761.37062.22202.18413.24231.37712.1564
H62.81682.93123.83812.92971.00762.12913.18843.16284.19662.12952.5445
C71.49192.15402.10282.15401.37062.12911.32432.15003.17632.22023.2481
N82.50903.22602.60633.22672.22203.18841.32431.37782.14672.26903.3315
C93.60774.20743.92224.20782.18413.16282.15001.37781.08111.37832.2566
H104.58375.20134.74985.20203.24234.19663.17632.14671.08112.21452.7797
C113.65374.08344.31034.08321.37712.12952.22022.26901.37832.21451.0800
H124.62024.95945.35034.95892.15642.54453.24813.33152.25662.77971.0800

picture of 1H-Imidazole, 2-methyl- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C7 N5 123.055 C1 C7 N8 125.874
H2 C1 H3 108.457 H2 C1 H4 108.007
H2 C1 C7 111.867 H3 C1 H4 108.458
H3 C1 C7 108.081 H4 C1 C7 111.868
N5 C7 N8 111.070 N5 C11 C9 104.869
N5 C11 H12 122.251 H6 N5 C7 126.403
H6 N5 C11 125.793 C7 N5 C11 107.804
C7 N8 C9 105.426 N8 C9 H10 121.156
N8 C9 C11 110.830 C9 C11 H12 132.881
H10 C9 C11 128.014
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability