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 CHFClCHFCl (1,2-dichloro-1,2-difluoroethane RR)

using model chemistry: mPW1PW91/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2 1A
Energy calculated at mPW1PW91/6-31G**
 hartrees
Energy at 0K-1197.424477
Energy at 298.15K-1197.427976
HF Energy-1197.424477
Nuclear repulsion energy377.528484
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 mPW1PW91/6-31G**
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 3151 2998 0.56      
2 A 1422 1353 11.80      
3 A 1318 1254 16.43      
4 A 1167 1110 217.34      
5 A 1100 1046 49.24      
6 A 845 804 91.82      
7 A 463 440 2.52      
8 A 315 300 1.21      
9 A 164 156 0.71      
10 A 80 76 0.66      
11 B 3162 3009 13.66      
12 B 1364 1298 7.15      
13 B 1250 1190 30.43      
14 B 1142 1087 24.70      
15 B 833 793 116.57      
16 B 439 418 11.46      
17 B 391 372 7.59      
18 B 334 318 12.41      

Unscaled Zero Point Vibrational Energy (zpe) 9469.9 cm-1
Scaled (by 0.9515) Zero Point Vibrational Energy (zpe) 9010.6 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 mPW1PW91/6-31G**
ABC
0.09845 0.06024 0.03887

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-31G**

Point Group is C2

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -0.222 0.730 0.396
C2 0.222 -0.730 0.396
H3 -1.308 0.814 0.339
H4 1.308 -0.814 0.339
F5 0.222 1.281 1.551
F6 -0.222 -1.281 1.551
Cl7 0.475 1.609 -0.980
Cl8 -0.475 -1.609 -0.980

Atom - Atom Distances (Å)
  C1 C2 H3 H4 F5 F6 Cl7 Cl8
C11.52631.09132.17471.35452.31961.77532.7255
C21.52632.17471.09132.31961.35452.72551.7753
H31.09132.17473.08192.00702.65302.35692.8818
H42.17471.09133.08192.65302.00702.88182.3569
F51.35452.31962.00702.65302.60102.56463.9045
F62.31961.35452.65302.00702.60103.90452.5646
Cl71.77532.72552.35692.88182.56463.90453.3550
Cl82.72551.77532.88182.35693.90452.56463.3550

picture of 1,2-dichloro-1,2-difluoroethane RR state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H4 111.282 C1 C2 F6 107.104
C1 C2 Cl8 111.059 C2 C1 H3 111.282
C2 C1 F5 107.104 C2 C1 Cl7 111.059
H3 C1 F5 109.824 H3 C1 Cl7 108.237
H4 C2 F6 109.824 H4 C2 Cl8 108.237
F5 C1 Cl7 109.319 F6 C2 Cl8 109.319
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.073      
2 C 0.073      
3 H 0.198      
4 H 0.198      
5 F -0.263      
6 F -0.263      
7 Cl -0.009      
8 Cl -0.009      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 -0.032 0.032
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -44.020 -2.375 0.000
y -2.375 -49.450 0.000
z 0.000 0.000 -49.149
Traceless
 xyz
x 5.280 -2.375 0.000
y -2.375 -2.866 0.000
z 0.000 0.000 -2.414
Polar
3z2-r2-4.827
x2-y25.430
xy-2.375
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.981 0.756 0.000
y 0.756 6.378 0.000
z 0.000 0.000 6.810


<r2> (average value of r2) Å2
<r2> 245.618
(<r2>)1/2 15.672