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All results from a given calculation for C3H4 (cyclopropene)

using model chemistry: QCISD/6-311G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2v 1A1
Energy calculated at QCISD/6-311G**
 hartrees
Energy at 0K-116.303598
Energy at 298.15K-116.306821
HF Energy-115.850513
Nuclear repulsion energy63.557650
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/6-311G**
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 3331 3179 0.07      
2 A1 3083 2942 58.22      
3 A1 1711 1632 16.47      
4 A1 1544 1473 1.89      
5 A1 1181 1127 0.12      
6 A1 940 897 3.48      
7 A2 1032 984 0.00      
8 A2 839 800 0.00      
9 B1 3153 3009 49.60      
10 B1 1124 1072 2.38      
11 B1 596 568 79.59      
12 B2 3285 3134 0.12      
13 B2 1094 1044 31.89      
14 B2 1054 1005 23.80      
15 B2 807 770 14.38      

Unscaled Zero Point Vibrational Energy (zpe) 12387.1 cm-1
Scaled (by 0.9541) Zero Point Vibrational Energy (zpe) 11818.5 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 QCISD/6-311G**
ABC
0.99627 0.72607 0.45865

See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-311G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.866
C2 0.000 0.651 -0.503
C3 0.000 -0.651 -0.503
H4 0.000 1.584 -1.042
H5 0.000 -1.584 -1.042
H6 0.916 0.000 1.460
H7 -0.916 0.000 1.460

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.51521.51522.48022.48021.09201.0920
C21.51521.30191.07832.29962.26172.2617
C31.51521.30192.29961.07832.26172.2617
H42.48021.07832.29963.16873.10043.1004
H52.48022.29961.07833.16873.10043.1004
H61.09202.26172.26173.10043.10041.8322
H71.09202.26172.26173.10043.10041.8322

picture of cyclopropene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 64.558 C1 C2 H4 145.489
C1 C3 C2 64.558 C1 C3 H5 145.489
C2 C1 C3 50.885 C2 C1 H6 119.440
C2 C1 H7 119.440 C2 C3 H5 149.953
C3 C1 H6 119.440 C3 C1 H7 119.440
C3 C2 H4 149.953 H6 C1 H7 114.047
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability