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All results from a given calculation for C3H4N2 (1H-Imidazole)

using model chemistry: MP2/CEP-121G

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/CEP-121G
 hartrees
Energy at 0K-38.511439
Energy at 298.15K-38.517168
HF Energy-38.026408
Nuclear repulsion energy82.463924
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/CEP-121G
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' 3632 3545 49.76      
2 A' 3251 3173 4.26      
3 A' 3236 3158 4.75      
4 A' 3225 3147 1.85      
5 A' 1505 1468 18.45      
6 A' 1437 1402 9.60      
7 A' 1395 1362 17.09      
8 A' 1312 1281 8.36      
9 A' 1233 1204 4.63      
10 A' 1154 1127 0.62      
11 A' 1090 1064 13.30      
12 A' 1080 1054 16.63      
13 A' 1032 1008 33.11      
14 A' 926 904 5.08      
15 A' 885 864 6.49      
16 A" 726 709 120.28      
17 A" 686 670 15.59      
18 A" 650 635 0.68      
19 A" 618 604 0.40      
20 A" 581 567 116.85      
21 A" 501 489 8.60      

Unscaled Zero Point Vibrational Energy (zpe) 15077.4 cm-1
Scaled (by 0.976) Zero Point Vibrational Energy (zpe) 14715.5 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/CEP-121G
ABC
0.30653 0.29653 0.15072

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/CEP-121G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 1.131 0.000
C2 -1.127 0.300 0.000
C3 1.150 0.302 0.000
N4 -0.761 -1.000 0.000
C5 0.660 -1.018 0.000
H6 -0.002 2.142 0.000
H7 -2.143 0.681 0.000
H8 2.156 0.703 0.000
H9 1.218 -1.947 0.000

Atom - Atom Distances (Å)
  N1 C2 C3 N4 C5 H6 H7 H8 H9
N11.40031.41742.26242.24771.01192.19002.19843.3098
C21.40032.27751.35062.22102.15881.08483.30843.2478
C31.41742.27752.31261.40792.17143.31511.08312.2503
N42.26241.35062.31261.42153.23272.17603.37802.1935
C52.24772.22101.40791.42153.22913.27802.28011.0835
H61.01192.15882.17143.23273.22912.59252.59484.2677
H72.19001.08483.31512.17603.27802.59254.29974.2661
H82.19843.30841.08313.37802.28012.59484.29972.8113
H93.30983.24782.25032.19351.08354.26774.26612.8113

picture of 1H-Imidazole state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 N4 110.642 N1 C2 H7 123.086
N1 C3 C5 105.410 N1 C3 H8 122.525
C2 N1 C3 107.853 C2 N1 H6 126.246
C2 N4 C5 106.460 C3 N1 H6 125.901
C3 C5 N4 109.636 C3 C5 H9 128.700
N4 C2 H7 126.273 N4 C5 H9 121.664
C5 C3 H8 132.065
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability