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All results from a given calculation for C3H8 (Propane)

using model chemistry: QCISD/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at QCISD/3-21G
 hartrees
Energy at 0K-117.935102
Energy at 298.15K-117.943529
HF Energy-117.611770
Nuclear repulsion energy81.607571
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/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 3087 2992 46.03      
2 A1 3027 2934 16.35      
3 A1 3020 2927 14.50      
4 A1 1587 1538 4.38      
5 A1 1569 1521 0.32      
6 A1 1482 1437 3.76      
7 A1 1213 1175 1.79      
8 A1 848 822 0.76      
9 A1 378 367 0.18      
10 A2 3078 2983 0.00      
11 A2 1570 1522 0.00      
12 A2 1366 1324 0.00      
13 A2 960 930 0.00      
14 A2 231 223 0.00      
15 B1 3092 2997 84.66      
16 B1 3052 2958 0.65      
17 B1 1585 1536 11.66      
18 B1 1267 1228 0.41      
19 B1 773 749 4.16      
20 B1 276 268 0.00      
21 B2 3083 2988 24.92      
22 B2 3018 2925 26.29      
23 B2 1576 1527 2.31      
24 B2 1466 1421 3.60      
25 B2 1410 1366 2.01      
26 B2 1037 1005 1.99      
27 B2 961 932 2.28      

Unscaled Zero Point Vibrational Energy (zpe) 23004.8 cm-1
Scaled (by 0.9692) Zero Point Vibrational Energy (zpe) 22296.3 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 QCISD/3-21G
ABC
0.95112 0.27583 0.24339

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

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.606
C2 0.000 1.287 -0.268
C3 0.000 -1.287 -0.268
H4 0.887 0.000 1.258
H5 -0.887 0.000 1.258
H6 0.000 2.191 0.358
H7 0.000 -2.191 0.358
H8 0.892 1.309 -0.913
H9 -0.892 1.309 -0.913
H10 -0.892 -1.309 -0.913
H11 0.892 -1.309 -0.913

Atom - Atom Distances (Å)
  C1 C2 C3 H4 H5 H6 H7 H8 H9 H10 H11
C11.55561.55561.10091.10092.20522.20522.19422.19422.19422.1942
C21.55562.57362.18462.18461.09973.53381.10031.10032.81942.8194
C31.55562.57362.18462.18463.53381.09972.81942.81941.10031.1003
H41.10092.18462.18461.77352.52962.52962.53513.09663.09662.5351
H51.10092.18462.18461.77352.52962.52963.09662.53512.53513.0966
H62.20521.09973.53382.52962.52964.38231.78501.78503.82883.8288
H72.20523.53381.09972.52962.52964.38233.82883.82881.78501.7850
H82.19421.10032.81942.53513.09661.78503.82881.78313.16772.6182
H92.19421.10032.81943.09662.53511.78503.82881.78312.61823.1677
H102.19422.81941.10033.09662.53513.82881.78503.16772.61821.7831
H112.19422.81941.10032.53513.09663.82881.78502.61823.16771.7831

picture of Propane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C2 H6 111.131 C1 C2 H8 110.235
C1 C2 H9 110.235 C1 C3 H7 111.131
C1 C3 H10 110.235 C1 C3 H11 110.235
C2 C1 C3 111.625 C2 C1 H4 109.451
C2 C1 H5 109.451 C3 C1 H4 109.451
C3 C1 H5 109.451 H4 C1 H5 107.313
H6 C2 H8 108.457 H6 C2 H9 108.457
H7 C3 H10 108.457 H7 C3 H11 108.457
H8 C2 H9 108.246 H10 C3 H11 108.246
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability