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 C4H4N (pyrrolide radical)

using model chemistry: MP2/cc-pVDZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 2A2
Energy calculated at MP2/cc-pVDZ
 hartrees
Energy at 0K-208.861562
Energy at 298.15K-208.866315
HF Energy-208.213213
Nuclear repulsion energy150.522639
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/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 A1 3304 3147 0.32      
2 A1 3262 3107 0.57      
3 A1 1595 1519 17.62      
4 A1 1463 1394 26.97      
5 A1 1264 1204 8.13      
6 A1 1112 1059 36.04      
7 A1 1065 1014 7.99      
8 A1 886 844 12.04      
9 A2 925 881 0.00      
10 A2 861 820 0.00      
11 A2 510 486 0.00      
12 B1 910 867 0.02      
13 B1 720 686 54.01      
14 B1 571 544 27.25      
15 B2 121668 115889 0.00      
16 B2 3281 3125 50.52      
17 B2 3254 3100 70.51      
18 B2 1316 1254 111.00      
19 B2 1293 1231 29.88      
20 B2 1026 978 0.62      
21 B2 882 840 5.73      

Unscaled Zero Point Vibrational Energy (zpe) 75584.3 cm-1
Scaled (by 0.9525) Zero Point Vibrational Energy (zpe) 71994.0 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/cc-pVDZ
ABC
0.33179 0.29244 0.15544

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 1.252
C2 0.000 1.057 0.424
C3 0.000 -1.057 0.424
C4 0.000 0.693 -0.985
C5 0.000 -0.693 -0.985
H6 0.000 2.076 0.822
H7 0.000 -2.076 0.822
H8 0.000 1.373 -1.837
H9 0.000 -1.373 -1.837

Atom - Atom Distances (Å)
  N1 C2 C3 C4 C5 H6 H7 H8 H9
N11.34221.34222.34132.34132.12022.12023.38033.3803
C21.34222.11381.45552.24641.09413.15832.28363.3194
C31.34222.11382.24641.45553.15831.09413.31942.2836
C42.34131.45552.24641.38512.27583.30621.09062.2343
C52.34132.24641.45551.38513.30622.27582.23431.0906
H62.12021.09413.15832.27583.30624.15242.75084.3552
H72.12023.15831.09413.30622.27584.15244.35522.7508
H83.38032.28363.31941.09062.23432.75084.35522.7456
H93.38033.31942.28362.23431.09064.35522.75082.7456

picture of pyrrolide radical state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 C4 113.558 N1 C2 H6 120.631
N1 C3 C5 113.558 N1 C3 H7 120.631
C2 N1 C3 103.891 C2 C4 C5 104.496
C2 C4 H8 126.915 C3 C5 C4 104.496
C3 C5 H9 126.915 C4 C2 H6 125.811
C4 C5 H9 128.589 C5 C3 H7 125.811
C5 C4 H8 128.589
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability