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 C3H4N2 (1H-Imidazole)

using model chemistry: B2PLYP=FULL/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B2PLYP=FULL/cc-pVTZ
 hartrees
Energy at 0K-226.136273
Energy at 298.15K-226.142287
HF Energy-225.824823
Nuclear repulsion energy163.666377
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 B2PLYP=FULL/cc-pVTZ
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' 3682 3519 59.74      
2 A' 3302 3156 1.21      
3 A' 3275 3130 0.44      
4 A' 3272 3127 4.61      
5 A' 1559 1490 10.02      
6 A' 1511 1444 15.19      
7 A' 1444 1380 14.70      
8 A' 1372 1311 6.64      
9 A' 1292 1235 0.57      
10 A' 1168 1116 4.61      
11 A' 1154 1103 2.53      
12 A' 1102 1054 16.50      
13 A' 1082 1035 36.86      
14 A' 947 905 1.52      
15 A' 909 869 8.30      
16 A" 883 844 4.26      
17 A" 831 794 32.53      
18 A" 743 710 36.50      
19 A" 687 657 4.10      
20 A" 652 624 10.75      
21 A" 535 511 87.93      

Unscaled Zero Point Vibrational Energy (zpe) 15700.6 cm-1
Scaled (by 0.9558) Zero Point Vibrational Energy (zpe) 15006.6 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 B2PLYP=FULL/cc-pVTZ
ABC
0.32718 0.31524 0.16055

See section I.F.4 to change rotational constant units
Geometric Data calculated at B2PLYP=FULL/cc-pVTZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 1.101 0.000
C2 -1.087 0.283 0.000
C3 1.115 0.299 0.000
N4 -0.740 -0.983 0.000
C5 0.634 -0.981 0.000
H6 -0.009 2.104 0.000
H7 -2.093 0.661 0.000
H8 2.110 0.700 0.000
H9 1.196 -1.896 0.000

Atom - Atom Distances (Å)
  N1 C2 C3 N4 C5 H6 H7 H8 H9
N11.36091.37422.21142.17691.00312.13842.14793.2273
C21.36092.20261.31192.13532.11671.07453.22423.1559
C31.37422.20262.25501.36752.12733.22851.07232.1964
N42.21141.31192.25501.37413.17232.12893.30952.1409
C52.17692.13531.36751.37413.15193.18322.23681.0738
H61.00312.11672.12733.17233.15192.53422.54274.1782
H72.13841.07453.22852.12893.18322.53424.20284.1661
H82.14793.22421.07233.30952.23682.54274.20282.7519
H93.22733.15592.19642.14091.07384.17824.16612.7519

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 111.645 N1 C2 H7 122.376
N1 C3 C5 105.121 N1 C3 H8 122.316
C2 N1 C3 107.282 C2 N1 H6 126.450
C2 N4 C5 105.278 C3 N1 H6 126.269
C3 C5 N4 110.674 C3 C5 H9 127.822
N4 C2 H7 125.978 N4 C5 H9 121.504
C5 C3 H8 132.563
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability