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All results from a given calculation for C5H8 (1,2-Pentadiene)

using model chemistry: QCISD/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A'
Energy calculated at QCISD/6-31G*
 hartrees
Energy at 0K-194.626167
Energy at 298.15K 
HF Energy-193.931763
Nuclear repulsion energy156.125720
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 QCISD/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 3169 3018 6.03      
2 A 3162 3011 13.43      
3 A 3147 2997 33.17      
4 A 3071 2925 18.27      
5 A 3049 2904 37.09      
6 A 2074 1975 13.42      
7 A 1553 1479 3.84      
8 A 1543 1470 0.47      
9 A 1522 1450 1.80      
10 A 1470 1400 4.11      
11 A 1419 1351 12.76      
12 A 1392 1326 0.50      
13 A 1179 1122 0.78      
14 A 1124 1070 3.34      
15 A 1019 970 0.39      
16 A 886 844 43.32      
17 A 873 831 10.01      
18 A 640 610 1.93      
19 A 365 348 2.44      
20 A 154 147 0.18      
21 A 3244 3089 6.60      
22 A 3151 3000 31.17      
23 A 3079 2932 21.14      
24 A 1546 1472 6.16      
25 A 1322 1259 0.05      
26 A 1142 1087 2.33      
27 A 1053 1003 0.17      
28 A 917 873 12.43      
29 A 811 773 3.42      
30 A 525 500 4.09      
31 A 327 312 4.66      
32 A 263 251 0.01      
33 A 90 86 0.17      

Unscaled Zero Point Vibrational Energy (zpe) 25139.8 cm-1
Scaled (by 0.9523) Zero Point Vibrational Energy (zpe) 23940.6 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 QCISD/6-31G*
See section I.F.4 to change rotational constant units
Geometric Data calculated at QCISD/6-31G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.402 0.454 0.000
C2 -1.458 -1.073 0.000
C3 0.000 1.025 0.000
C4 1.108 0.314 0.000
C5 2.219 -0.391 0.000
H6 -1.939 0.847 0.877
H7 -1.939 0.847 -0.877
H8 -2.497 -1.422 0.000
H9 -0.958 -1.484 -0.885
H10 -0.958 -1.484 0.885
H11 0.084 2.115 0.000
H12 2.701 -0.697 -0.927
H13 2.701 -0.697 0.927

Atom - Atom Distances (Å)
  C1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12 H13
C11.52781.51432.51453.71911.10061.10062.17202.17602.17602.22884.36184.3618
C21.52782.55462.91683.73962.16512.16511.09681.09641.09643.54074.27754.2775
C31.51432.55461.31662.63282.13552.13553.49642.82732.82731.09273.33523.3352
C42.51452.91681.31661.31623.21543.21544.00182.87802.87802.07122.10262.1026
C53.71913.73962.63281.31624.42674.42674.82803.47413.47413.29221.08881.0888
H61.10062.16512.13553.21544.42671.75322.49593.08222.52922.54325.21284.8911
H71.10062.16512.13553.21544.42671.75322.49592.52923.08222.54324.89115.2128
H82.17201.09683.49644.00184.82802.49592.49591.77711.77714.37845.33025.3302
H92.17601.09642.82732.87803.47413.08222.52921.77711.77013.84903.74264.1580
H102.17601.09642.82732.87803.47412.52923.08221.77711.77013.84904.15803.7426
H112.22883.54071.09272.07123.29222.54322.54324.37843.84903.84903.95183.9518
H124.36184.27753.33522.10261.08885.21284.89115.33023.74264.15803.95181.8541
H134.36184.27753.33522.10261.08884.89115.21285.33024.15803.74263.95181.8541

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 110.626 C1 C2 H9 110.969
C1 C2 H10 110.969 C1 C3 C4 125.161
C1 C3 H11 116.574 C2 C1 C3 114.232
C2 C1 H6 109.856 C2 C1 H7 109.856
C3 C1 H6 108.467 C3 C1 H7 108.467
C3 C4 C5 179.736 C4 C3 H11 118.265
C4 C5 H12 121.628 C4 C5 H13 121.628
H6 C1 H7 105.592 H8 C2 H9 108.252
H8 C2 H10 108.252 H9 C2 H10 107.656
H12 C5 H13 116.743
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability