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 C4H3ClO (Furan, 2-chloro)

using model chemistry: CISD/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CISD/3-21G*
 hartrees
Energy at 0K-684.698523
Energy at 298.15K-684.702463
HF Energy-684.163756
Nuclear repulsion energy263.122713
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 CISD/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 A' 3407 3183 0.06      
2 A' 3379 3157 0.99      
3 A' 3358 3138 1.38      
4 A' 1664 1555 25.46      
5 A' 1565 1462 48.73      
6 A' 1442 1347 13.51      
7 A' 1320 1233 8.96      
8 A' 1226 1146 26.83      
9 A' 1175 1098 30.50      
10 A' 1086 1015 18.74      
11 A' 1052 983 7.71      
12 A' 956 894 17.17      
13 A' 942 880 23.31      
14 A' 506 473 3.49      
15 A' 315 294 0.44      
16 A" 929 868 0.28      
17 A" 892 833 21.02      
18 A" 806 753 75.53      
19 A" 669 625 4.44      
20 A" 629 588 10.56      
21 A" 240 225 3.57      

Unscaled Zero Point Vibrational Energy (zpe) 13777.8 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 12873.9 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 CISD/3-21G*
ABC
0.30628 0.07014 0.05707

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.282 0.000
C2 1.296 -0.102 0.000
C3 1.286 -1.556 0.000
C4 -0.010 -1.945 0.000
O5 -0.847 -0.817 0.000
Cl6 -0.732 1.824 0.000
H7 2.152 0.544 0.000
H8 2.147 -2.197 0.000
H9 -0.508 -2.893 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 O5 Cl6 H7 H8 H9
C11.35132.24382.22771.38791.70682.16793.27983.2153
C21.35131.45462.25892.25892.79651.07242.26163.3230
C32.24381.45461.35302.25753.93702.27141.07332.2372
C42.22772.25891.35301.40493.83803.29672.17171.0704
O51.38792.25892.25751.40492.64373.29333.29692.1029
Cl61.70682.79653.93703.83802.64373.15574.94564.7219
H72.16791.07242.27143.29673.29333.15572.74034.3456
H83.27982.26161.07332.17173.29694.94562.74032.7452
H93.21533.32302.23721.07042.10294.72194.34562.7452

picture of Furan, 2-chloro state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 C3 106.138 C1 C2 H7 126.496
C1 O5 C4 105.808 C2 C1 O5 111.100
C2 C1 Cl6 131.915 C2 C3 C4 107.083
C2 C3 H8 126.264 C3 C2 H7 127.366
C3 C4 O5 109.871 C3 C4 H9 134.466
C4 C3 H8 126.652 O5 C1 Cl6 116.985
O5 C4 H9 115.663
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability