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 C5H8 (1,2-Pentadiene)

using model chemistry: TPSSh/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A'
Energy calculated at TPSSh/6-31G(2df,p)
 hartrees
Energy at 0K-195.321127
Energy at 298.15K-195.328408
HF Energy-195.321127
Nuclear repulsion energy156.503380
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 TPSSh/6-31G(2df,p)
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' 3124 3015 7.15      
2 A' 3121 3012 14.75      
3 A' 3113 3004 34.71      
4 A' 3038 2932 21.88      
5 A' 3006 2901 40.35      
6 A' 2057 1985 24.55      
7 A' 1514 1461 3.23      
8 A' 1496 1444 0.91      
9 A' 1481 1430 1.85      
10 A' 1419 1369 2.40      
11 A' 1374 1326 18.71      
12 A' 1337 1290 2.46      
13 A' 1153 1112 1.26      
14 A' 1085 1047 2.65      
15 A' 993 959 0.30      
16 A' 869 839 45.47      
17 A' 848 818 3.36      
18 A' 633 611 2.36      
19 A' 352 340 2.73      
20 A' 147 142 0.19      
21 A" 3195 3083 5.31      
22 A" 3112 3003 32.39      
23 A" 3030 2924 20.68      
24 A" 1506 1453 5.21      
25 A" 1286 1241 0.09      
26 A" 1100 1062 2.21      
27 A" 1022 986 0.41      
28 A" 907 875 11.58      
29 A" 783 755 1.96      
30 A" 521 503 3.67      
31 A" 340 328 5.15      
32 A" 242 234 0.09      
33 A" 102 98 0.18      

Unscaled Zero Point Vibrational Energy (zpe) 24652.4 cm-1
Scaled (by 0.965) Zero Point Vibrational Energy (zpe) 23789.5 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 TPSSh/6-31G(2df,p)
ABC
0.33947 0.10678 0.08520

See section I.F.4 to change rotational constant units
Geometric Data calculated at TPSSh/6-31G(2df,p)

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.401 0.442 0.000
C2 -1.457 -1.086 0.000
C3 0.000 1.017 0.000
C4 1.109 0.326 0.000
C5 2.216 -0.369 0.000
H6 -1.935 0.837 0.875
H7 -1.935 0.837 -0.875
H8 -0.959 -1.498 -0.883
H9 -2.496 -1.432 0.000
H10 -0.959 -1.498 0.883
H11 0.072 2.105 0.000
H12 2.702 -0.664 -0.927
H13 2.702 -0.664 0.927

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.52961.51412.51273.70711.09851.09852.17692.17032.17692.22144.34974.3497
C21.52962.55872.92893.74262.16642.16641.09441.09451.09443.53904.28234.2823
C31.51412.55871.30722.61422.13122.13122.83253.49632.83251.09083.31503.3150
C42.51272.92891.30721.30713.20853.20852.89504.01032.89502.06032.09212.0921
C53.70713.74262.61421.30714.41074.41073.48354.83013.48353.27481.08721.0872
H61.09852.16642.13123.20854.41071.74993.08152.49542.53062.53015.19684.8748
H71.09852.16642.13123.20854.41071.74992.53062.49543.08152.53014.87485.1968
H82.17691.09442.83252.89503.48353.08152.53061.77381.76683.85023.75524.1684
H92.17031.09453.49634.01034.83012.49542.49541.77381.77384.37065.33545.3354
H102.17691.09442.83252.89503.48352.53063.08151.76681.77383.85024.16843.7552
H112.22143.53901.09082.06033.27482.53012.53013.85024.37063.85023.93093.9309
H124.34974.28233.31502.09211.08725.19684.87483.75525.33544.16843.93091.8532
H134.34974.28233.31502.09211.08724.87485.19684.16845.33543.75523.93091.8532

picture of 1,2-Pentadiene state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H8 111.030 C1 C2 H9 110.503
C1 C2 H10 111.030 C1 C3 C4 125.750
C1 C3 H11 116.079 C2 C1 C3 114.414
C2 C1 H6 109.953 C2 C1 H7 109.953
C3 C1 H6 108.270 C3 C1 H7 108.270
C3 C4 C5 179.826 C4 C3 H11 118.171
C4 C5 H12 121.535 C4 C5 H13 121.535
H6 C1 H7 105.590 H8 C2 H9 108.260
H8 C2 H10 107.643 H9 C2 H10 108.260
H12 C5 H13 116.922
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability