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All results from a given calculation for C3H4 (cyclopropene)

using model chemistry: CCD/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2v 1A1
Energy calculated at CCD/3-21G*
 hartrees
Energy at 0K-115.458284
Energy at 298.15K-115.461489
HF Energy-115.159651
Nuclear repulsion energy62.829261
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 CCD/3-21G*
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 3329 3184 0.16      
2 A1 3118 2982 27.59      
3 A1 1677 1604 10.62      
4 A1 1573 1505 0.48      
5 A1 1130 1081 1.04      
6 A1 927 887 2.21      
7 A2 1051 1005 0.00      
8 A2 855 818 0.00      
9 B1 3198 3059 34.29      
10 B1 1121 1073 2.38      
11 B1 626 599 92.85      
12 B2 3280 3137 0.13      
13 B2 1134 1085 2.18      
14 B2 1103 1055 59.27      
15 B2 714 683 7.98      

Unscaled Zero Point Vibrational Energy (zpe) 12418.7 cm-1
Scaled (by 0.9565) Zero Point Vibrational Energy (zpe) 11878.5 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 CCD/3-21G*
ABC
0.99020 0.69586 0.44554

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCD/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.892
C2 0.000 0.655 -0.514
C3 0.000 -0.655 -0.514
H4 0.000 1.578 -1.066
H5 0.000 -1.578 -1.066
H6 0.920 0.000 1.473
H7 -0.920 0.000 1.473

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7
C11.55051.55052.51412.51411.08841.0884
C21.55051.31021.07532.30022.28532.2853
C31.55051.31022.30021.07532.28532.2853
H42.51411.07532.30023.15563.12753.1275
H52.51412.30021.07533.15563.12753.1275
H61.08842.28532.28533.12753.12751.8403
H71.08842.28532.28533.12753.12751.8403

picture of cyclopropene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 65.007 C1 C2 H4 145.888
C1 C3 C2 65.007 C1 C3 H5 145.888
C2 C1 C3 49.987 C2 C1 H6 118.951
C2 C1 H7 118.951 C2 C3 H5 149.106
C3 C1 H6 118.951 C3 C1 H7 118.951
C3 C2 H4 149.106 H6 C1 H7 115.437
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability