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: QCISD/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 2A2
Energy calculated at QCISD/6-31G(2df,p)
 hartrees
Energy at 0K-209.009801
Energy at 298.15K-209.014472
HF Energy-208.217908
Nuclear repulsion energy150.901915
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 QCISD/6-31G(2df,p)
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A1 3305 3131 0.94      
2 A1 3259 3088 1.46      
3 A1 1593 1509 0.04      
4 A1 1475 1398 20.04      
5 A1 1218 1154 1.65      
6 A1 1111 1053 30.93      
7 A1 1059 1004 0.52      
8 A1 885 838 12.06      
9 A2 918 870 0.00      
10 A2 840 796 0.00      
11 A2 504 477 0.00      
12 B1 842 797 1.27      
13 B1 734 695 52.31      
14 B1 557 528 17.79      
15 B2 3284 3112 0.18      
16 B2 3255 3084 7.86      
17 B2 1534 1453 24.85      
18 B2 1313 1244 2.40      
19 B2 1174 1112 97.40      
20 B2 1034 979 0.57      
21 B2 821 777 1.88      

Unscaled Zero Point Vibrational Energy (zpe) 15356.3 cm-1
Scaled (by 0.9474) Zero Point Vibrational Energy (zpe) 14548.6 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 QCISD/6-31G(2df,p)
ABC
0.33394 0.29306 0.15608

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-31G(2df,p)

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.000 0.000 1.249
C2 0.000 1.062 0.425
C3 0.000 -1.062 0.425
C4 0.000 0.679 -0.986
C5 0.000 -0.679 -0.986
H6 0.000 2.071 0.818
H7 0.000 -2.071 0.818
H8 0.000 1.353 -1.828
H9 0.000 -1.353 -1.828

Atom - Atom Distances (Å)
  N1 C2 C3 C4 C5 H6 H7 H8 H9
N11.34441.34442.33562.33562.11522.11523.36143.3614
C21.34442.12461.46192.24101.08243.15772.27163.3032
C31.34442.12462.24101.46193.15771.08243.30322.2716
C42.33561.46192.24101.35782.27833.28851.07902.1999
C52.33562.24101.46191.35783.28852.27832.19991.0790
H62.11521.08243.15772.27833.28854.14172.74124.3273
H72.11523.15771.08243.28852.27834.14174.32732.7412
H83.36142.27163.30321.07902.19992.74124.32732.7070
H93.36143.30322.27162.19991.07904.32732.74122.7070

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 112.598 N1 C2 H6 120.914
N1 C3 C5 112.598 N1 C3 H7 120.914
C2 N1 C3 104.397 C2 C4 C5 105.203
C2 C4 H8 126.099 C3 C5 C4 105.203
C3 C5 H9 126.099 C4 C2 H6 126.487
C4 C5 H9 128.697 C5 C3 H7 126.487
C5 C4 H8 128.697
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability