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: CCSD/cc-pVTZ

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at CCSD/cc-pVTZ
 hartrees
Energy at 0K-688.710945
Energy at 298.15K-688.714829
HF Energy-687.638928
Nuclear repulsion energy265.849795
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 CCSD/cc-pVTZ
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' 3322 3127 0.00      
2 A' 3308 3114 0.78      
3 A' 3287 3094 1.60      
4 A' 1644 1548 19.14      
5 A' 1559 1468 60.55      
6 A' 1430 1346 13.84      
7 A' 1274 1199 28.54      
8 A' 1234 1161 40.16      
9 A' 1168 1100 7.10      
10 A' 1109 1044 17.37      
11 A' 1036 975 22.64      
12 A' 947 891 26.80      
13 A' 905 851 1.88      
14 A' 503 474 3.38      
15 A' 317 298 0.41      
16 A" 891 839 0.05      
17 A" 830 781 18.30      
18 A" 765 720 60.10      
19 A" 646 608 3.85      
20 A" 614 578 6.72      
21 A" 232 219 2.12      

Unscaled Zero Point Vibrational Energy (zpe) 13511.3 cm-1
Scaled (by 0.9412) Zero Point Vibrational Energy (zpe) 12716.8 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 CCSD/cc-pVTZ
ABC
0.31062 0.07176 0.05829

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.265 0.000
C2 1.305 -0.089 0.000
C3 1.301 -1.528 0.000
C4 0.002 -1.903 0.000
O5 -0.817 -0.810 0.000
Cl6 -0.760 1.792 0.000
H7 2.147 0.578 0.000
H8 2.154 -2.182 0.000
H9 -0.495 -2.855 0.000

Atom - Atom Distances (Å)
  C1 C2 C3 C4 O5 Cl6 H7 H8 H9
C11.35212.21602.16851.35041.70532.16953.26093.1591
C21.35211.43952.23372.24092.79301.07392.25943.2998
C32.21601.43951.35242.23663.90812.26941.07502.2326
C42.16852.23371.35241.36573.77283.27952.17071.0734
O51.35042.24092.23661.36572.60273.27253.27292.0700
Cl61.70532.79303.90813.77282.60273.15044.92854.6544
H72.16951.07392.26943.27953.27253.15042.76004.3312
H83.26092.25941.07502.17073.27294.92852.76002.7331
H93.15913.29982.23261.07342.07004.65444.33122.7331

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 105.044 C1 C2 H7 126.456
C1 O5 C4 105.948 C2 C1 O5 112.033
C2 C1 Cl6 131.651 C2 C3 C4 106.230
C2 C3 H8 127.328 C3 C2 H7 128.500
C3 C4 O5 110.746 C3 C4 H9 133.636
C4 C3 H8 126.442 O5 C1 Cl6 116.317
O5 C4 H9 115.618
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability