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 C7H7 (cycloheptatrienyl radical)

using model chemistry: MP2=FULL/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 no C2V 2A2
Energy calculated at MP2=FULL/3-21G*
 hartrees
Energy at 0K-268.167273
Energy at 298.15K 
HF Energy-267.595105
Nuclear repulsion energy258.479212
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=FULL/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 A1 3220 3053 9.74      
2 A1 3195 3029 27.81      
3 A1 3165 3001 0.97      
4 A1 3160 2996 7.36      
5 A1 1779 1686 29.50      
6 A1 1577 1495 18.59      
7 A1 1538 1458 4.36      
8 A1 1386 1314 3.03      
9 A1 1221 1157 2.44      
10 A1 1020 967 5.82      
11 A1 956 906 1.02      
12 A1 842 798 0.37      
13 A1 476 451 0.33      
14 A2 1116 1058 0.00      
15 A2 936 888 0.00      
16 A2 757 718 0.00      
17 A2 648 614 0.00      
18 A2 139 132 0.00      
19 B1 1118 1060 0.81      
20 B1 1061 1006 0.79      
21 B1 825 782 11.54      
22 B1 664 629 78.06      
23 B1 514 488 61.26      
24 B1 310 293 0.99      
25 B2 3212 3045 23.49      
26 B2 3180 3015 31.69      
27 B2 3156 2992 0.23      
28 B2 1756 1665 28.06      
29 B2 1550 1469 8.60      
30 B2 1498 1420 0.22      
31 B2 1384 1312 0.63      
32 B2 1350 1280 0.82      
33 B2 967 917 5.41      
34 B2 951 901 0.09      
35 B2 442 419 0.52      
36 B2 2475i 2347i 269.78      

Unscaled Zero Point Vibrational Energy (zpe) 24296.5 cm-1
Scaled (by 0.948) Zero Point Vibrational Energy (zpe) 23033.1 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=FULL/3-21G*
ABC
0.12573 0.12342 0.06228

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2=FULL/3-21G*

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 1.615
C2 0.000 1.256 1.034
C3 0.000 -1.256 1.034
C4 0.000 1.558 -0.398
C5 0.000 -1.558 -0.398
C6 0.000 0.716 -1.443
C7 0.000 -0.716 -1.443
H8 0.000 0.000 2.706
H9 0.000 2.116 1.698
H10 0.000 -2.116 1.698
H11 0.000 2.623 -0.628
H12 0.000 -2.623 -0.628
H13 0.000 1.174 -2.431
H14 0.000 -1.174 -2.431

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 C6 C7 H8 H9 H10 H11 H12 H13 H14
C11.38431.38432.54542.54543.14073.14071.09082.11712.11713.45153.45154.21304.2130
C21.38432.51211.46273.15702.53443.16552.09171.08613.43642.15154.21993.46534.2316
C31.38432.51213.15701.46273.16552.53442.09173.43641.08614.21992.15154.23163.4653
C42.54541.46273.15703.11571.34192.50243.47282.16814.22891.08974.18722.06913.4053
C52.54543.15701.46273.11572.50241.34193.47284.22892.16814.18721.08973.40532.0691
C63.14072.53443.16551.34192.50241.43194.21003.43794.22822.07383.43691.08912.1326
C73.14073.16552.53442.50241.34191.43194.21004.22823.43793.43692.07382.13261.0891
H81.09082.09172.09173.47283.47284.21004.21002.34372.34374.24224.24225.26935.2693
H92.11711.08613.43642.16814.22893.43794.22822.34374.23112.38015.27844.23435.2785
H102.11713.43641.08614.22892.16814.22823.43792.34374.23115.27842.38015.27854.2343
H113.45152.15154.21991.08974.18722.07383.43694.24222.38015.27845.24602.31304.2032
H123.45154.21992.15154.18721.08973.43692.07384.24225.27842.38015.24604.20322.3130
H134.21303.46534.23162.06913.40531.08912.13265.26934.23435.27852.31304.20322.3478
H144.21304.23163.46533.40532.06912.13261.08915.26935.27854.23434.20322.31302.3478

picture of cycloheptatrienyl radical state 1 conformation 1
More geometry information
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability