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 CH3CHF2 (Ethane, 1,1-difluoro-)

using model chemistry: CCSD(T)=FULL/aug-cc-pVDZ

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(T)=FULL/aug-cc-pVDZ
 hartrees
Energy at 0K-277.743223
Energy at 298.15K 
HF Energy-276.980720
Nuclear repulsion energy130.878818
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(T)=FULL/aug-cc-pVDZ
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' 3150 3059        
2 A' 3108 3018        
3 A' 3049 2961        
4 A' 1466 1424        
5 A' 1428 1387        
6 A' 1369 1329        
7 A' 1151 1118        
8 A' 1139 1106        
9 A' 863 838        
10 A' 550 534        
11 A' 453 440        
12 A" 3143 3052        
13 A" 1467 1425        
14 A" 1367 1327        
15 A" 1129 1096        
16 A" 937 910        
17 A" 373 362        
18 A" 231 224        

Unscaled Zero Point Vibrational Energy (zpe) 13185.3 cm-1
Scaled (by 0.9712) Zero Point Vibrational Energy (zpe) 12805.6 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 CCSD(T)=FULL/aug-cc-pVDZ
ABC
0.30887 0.29371 0.16903

See section I.F.4 to change rotational constant units
Geometric Data calculated at CCSD(T)=FULL/aug-cc-pVDZ

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.325 0.173 0.000
C2 -0.910 1.045 0.000
H3 1.281 0.722 0.000
F4 0.325 -0.656 1.110
F5 0.325 -0.656 -1.110
H6 -1.807 0.404 0.000
H7 -0.910 1.683 0.899
H8 -0.910 1.683 -0.899

Atom - Atom Distances (Å)
  C1 C2 H3 F4 F5 H6 H7 H8
C11.51171.10251.38551.38552.14422.14752.1475
C21.51172.21492.37702.37701.10211.10231.1023
H31.10252.21492.01122.01123.10422.55582.5558
F41.38552.37702.01122.22032.62682.65293.3212
F51.38552.37702.01122.22032.62683.32122.6529
H62.14421.10213.10422.62682.62681.80211.8021
H72.14751.10232.55582.65293.32121.80211.7981
H82.14751.10232.55583.32122.65291.80211.7981

picture of Ethane, 1,1-difluoro- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H6 109.231 C1 C2 H7 109.483
C1 C2 H8 109.483 C2 C1 H3 114.931
C2 C1 F4 110.182 C2 C1 F5 110.182
H3 C1 F4 107.329 H3 C1 F5 107.329
F4 C1 F5 106.499 H6 C2 H7 109.665
H6 C2 H8 109.665 H7 C2 H8 109.301
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability