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/LANL2DZ

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/LANL2DZ
 hartrees
Energy at 0K-264.321679
Energy at 298.15K-264.329353
HF Energy-263.761309
Nuclear repulsion energy219.490820
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/LANL2DZ
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 3667 3532 57.75      
2 A 3308 3186 5.80      
3 A 3278 3157 3.03      
4 A 3156 3040 9.30      
5 A 3108 2993 29.23      
6 A 3023 2912 37.62      
7 A 1551 1494 37.35      
8 A 1540 1483 4.64      
9 A 1527 1471 12.74      
10 A 1472 1418 8.58      
11 A 1462 1408 2.15      
12 A 1396 1344 33.36      
13 A 1360 1310 5.92      
14 A 1290 1243 17.41      
15 A 1157 1114 12.52      
16 A 1115 1074 20.31      
17 A 1102 1061 1.11      
18 A 1089 1049 0.03      
19 A 992 955 15.80      
20 A 956 920 6.00      
21 A 916 882 1.20      
22 A 777 748 30.56      
23 A 687 662 98.94      
24 A 664 639 1.57      
25 A 660 636 1.57      
26 A 651 627 89.59      
27 A 616 593 10.22      
28 A 337 324 6.10      
29 A 235 226 6.80      
30 A 76 73 0.30      

Unscaled Zero Point Vibrational Energy (zpe) 21583.2 cm-1
Scaled (by 0.9631) Zero Point Vibrational Energy (zpe) 20786.8 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/LANL2DZ
ABC
0.28338 0.11418 0.08268

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/LANL2DZ

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.163 -0.022 0.000
H2 -2.555 0.492 -0.896
H3 -2.535 -1.058 -0.001
H4 -2.555 0.491 0.897
N5 0.170 1.075 -0.000
H6 -0.153 2.037 0.000
C7 -0.649 -0.070 -0.000
N8 0.124 -1.195 -0.000
C9 1.474 -0.743 0.000
H10 2.298 -1.449 0.000
C11 1.520 0.662 0.000
H12 2.344 1.367 -0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 N5 H6 C7 N8 C9 H10 C11 H12
C11.10511.10091.10512.57752.87751.51492.56993.70794.68363.74614.7163
H21.10511.79041.79282.92672.99312.18013.29024.30875.30334.17605.0567
H31.10091.79041.79043.44473.90592.12972.66284.02194.84914.40545.4489
H41.10511.79281.79042.92732.99422.18013.28974.30845.30284.17635.0572
N52.57752.92673.44472.92731.01511.40722.26992.23763.30161.41222.1942
H62.87752.99313.90592.99421.01512.16473.24373.22164.26172.16572.5857
C71.51492.18012.12972.18011.40722.16471.36452.22723.25352.28923.3200
N82.56993.29022.66283.28972.26993.24371.36451.42382.18892.32333.3898
C93.70794.30874.02194.30842.23763.22162.22721.42381.08491.40612.2823
H104.68365.30334.84915.30283.30164.26173.25352.18891.08492.25012.8163
C113.74614.17604.40544.17631.41222.16572.28922.32331.40612.25011.0842
H124.71635.05675.44895.05722.19422.58573.32003.38982.28232.81631.0842

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 123.749 C1 C7 N8 126.301
H2 C1 H3 108.506 H2 C1 H4 108.415
H2 C1 C7 111.678 H3 C1 H4 108.505
H3 C1 C7 107.964 H4 C1 C7 111.679
N5 C7 N8 109.950 N5 C11 C9 105.112
N5 C11 H12 122.485 H6 N5 C7 125.908
H6 N5 C11 125.518 C7 N5 C11 108.574
C7 N8 C9 106.003 N8 C9 H10 120.916
N8 C9 C11 110.361 C9 C11 H12 132.404
H10 C9 C11 128.723
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability