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 C6H6O (2,5-Cyclohexadienone)

using model chemistry: MP2/TZVP

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at MP2/TZVP
 hartrees
Energy at 0K-306.646802
Energy at 298.15K 
HF Energy-305.634840
Nuclear repulsion energy268.966295
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 MP2/TZVP
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 3241 3073 0.00      
2 A1 3206 3039 4.57      
3 A1 3056 2897 7.55      
4 A1 1723 1633 147.49      
5 A1 1673 1586 32.50      
6 A1 1452 1376 17.37      
7 A1 1426 1352 2.38      
8 A1 1204 1141 5.78      
9 A1 957 907 3.37      
10 A1 897 851 9.31      
11 A1 779 738 2.97      
12 A1 502 476 1.72      
13 A2 1181 1119 0.00      
14 A2 868 823 0.00      
15 A2 701 664 0.00      
16 A2 255 242 0.00      
17 B1 3086 2925 4.29      
18 B1 957 907 26.21      
19 B1 902 855 1.74      
20 B1 647 613 60.84      
21 B1 459 435 1.01      
22 B1 88 83 0.20      
23 B1 402i 381i 0.45      
24 B2 3240 3071 12.95      
25 B2 3206 3039 11.57      
26 B2 1660 1573 2.88      
27 B2 1437 1362 36.97      
28 B2 1399 1326 1.68      
29 B2 1291 1224 24.91      
30 B2 1153 1093 8.68      
31 B2 1009 956 5.50      
32 B2 574 544 0.90      
33 B2 451 428 12.74      

Unscaled Zero Point Vibrational Energy (zpe) 22138.7 cm-1
Scaled (by 0.9479) Zero Point Vibrational Energy (zpe) 20985.3 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 MP2/TZVP
ABC
0.17548 0.08902 0.05970

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/TZVP

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.109
C2 0.000 0.000 -1.821
C3 0.000 1.252 0.331
C4 0.000 -1.252 0.331
C5 0.000 1.253 -1.011
C6 0.000 -1.253 -1.011
O7 0.000 0.000 2.340
H8 0.000 2.173 0.901
H9 0.000 -2.173 0.901
H10 0.000 2.193 -1.553
H11 0.000 -2.193 -1.553
H12 0.870 0.000 -2.488
H13 -0.870 0.000 -2.488

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 O7 H8 H9 H10 H11 H12 H13
C12.92981.47431.47432.46312.46311.23072.18342.18343.44923.44923.70113.7011
C22.92982.48962.48961.49171.49174.16053.48283.48282.20962.20961.09681.0968
C31.47432.48962.50451.34242.84242.36721.08323.47282.10583.92703.20533.2053
C41.47432.48962.50452.84241.34242.36723.47281.08323.92702.10583.20533.2053
C52.46311.49171.34242.84242.50623.57782.12213.92401.08503.48872.12342.1234
C62.46311.49172.84241.34242.50623.57783.92402.12213.48871.08502.12342.1234
O71.23074.16052.36722.36723.57783.57782.60672.60674.46804.46804.90594.9059
H82.18343.48281.08323.47282.12213.92402.60674.34692.45375.00894.11914.1191
H92.18343.48283.47281.08323.92402.12212.60674.34695.00892.45374.11914.1191
H103.44922.20962.10583.92701.08503.48874.46802.45375.00894.38672.53832.5383
H113.44922.20963.92702.10583.48871.08504.46805.00892.45374.38672.53832.5383
H123.70111.09683.20533.20532.12342.12344.90594.11914.11912.53832.53831.7404
H133.70111.09683.20533.20532.12342.12344.90594.11914.11912.53832.53831.7404

picture of 2,5-Cyclohexadienone state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C3 C5 121.890 C1 C3 H8 116.409
C1 C4 C6 121.890 C1 C4 H9 116.409
C2 C5 C3 122.819 C2 C5 H10 117.210
C2 C6 C4 122.819 C2 C6 H11 117.210
C3 C1 C4 116.291 C3 C1 O7 121.855
C3 C5 H10 119.971 C4 C1 O7 121.855
C4 C6 H11 119.971 C5 C2 C6 114.290
C5 C2 H12 109.282 C5 C2 H13 109.282
C5 C3 H8 121.700 C6 C2 H12 109.282
C6 C2 H13 109.282 C6 C4 H9 121.700
H12 C2 H13 105.014
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability