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

using model chemistry: CCSD/aug-cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CCSD/aug-cc-pVDZ
 hartrees
Energy at 0K-225.620014
Energy at 298.15K-225.625976
HF Energy-224.845444
Nuclear repulsion energy162.010942
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 CCSD/aug-cc-pVDZ
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' 3696 3561 67.00      
2 A' 3305 3184 1.32      
3 A' 3280 3160 0.63      
4 A' 3277 3157 3.50      
5 A' 1574 1517 9.16      
6 A' 1522 1466 24.79      
7 A' 1465 1412 18.91      
8 A' 1377 1327 5.89      
9 A' 1282 1235 0.32      
10 A' 1158 1115 7.57      
11 A' 1149 1107 1.62      
12 A' 1101 1061 12.70      
13 A' 1076 1036 37.98      
14 A' 939 905 1.60      
15 A' 901 868 5.43      
16 A" 861 829 1.45      
17 A" 833 802 38.54      
18 A" 735 708 46.14      
19 A" 672 648 3.56      
20 A" 635 612 11.40      
21 A" 502 484 88.45      

Unscaled Zero Point Vibrational Energy (zpe) 15669.6 cm-1
Scaled (by 0.9634) Zero Point Vibrational Energy (zpe) 15096.1 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 CCSD/aug-cc-pVDZ
ABC
0.32067 0.30884 0.15732

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD/aug-cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 1.112 0.000
C2 -1.095 0.285 0.000
C3 1.128 0.302 0.000
N4 -0.751 -0.992 0.000
C5 0.641 -0.991 0.000
H6 -0.014 2.122 0.000
H7 -2.114 0.669 0.000
H8 2.136 0.707 0.000
H9 1.209 -1.919 0.000

Atom - Atom Distances (Å)
  N1 C2 C3 N4 C5 H6 H7 H8 H9
N11.37231.38822.23392.19851.01012.15982.17453.2635
C21.37232.22291.32272.15492.13151.08853.25923.1891
C31.38822.22292.28111.38172.14823.26211.08722.2229
N42.23391.32272.28111.39203.20002.14853.35022.1685
C52.19852.15491.38171.39203.18113.21632.26281.0883
H61.01012.13152.14823.20003.18112.55372.57404.2222
H72.15981.08853.26212.14853.21632.55374.25054.2121
H82.17453.25921.08723.35022.26282.57404.25052.7852
H93.26353.18912.22292.16851.08834.22224.21212.7852

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 111.960 N1 C2 H7 122.309
N1 C3 C5 105.069 N1 C3 H8 122.441
C2 N1 C3 107.265 C2 N1 H6 126.265
C2 N4 C5 105.050 C3 N1 H6 126.470
C3 C5 N4 110.656 C3 C5 H9 127.908
N4 C2 H7 125.731 N4 C5 H9 121.436
C5 C3 H8 132.489
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability