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 C5H9N (Butanenitrile, 2-methyl-)

using model chemistry: HF/CEP-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 HF/CEP-31G*
 hartrees
Energy at 0K-42.354162
Energy at 298.15K-42.363895
Nuclear repulsion energy119.980601
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 HF/CEP-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 3317 2979 51.18      
2 A 3312 2974 70.84      
3 A 3301 2965 105.93      
4 A 3288 2953 62.57      
5 A 3277 2942 5.42      
6 A 3266 2932 5.55      
7 A 3240 2910 12.24      
8 A 3234 2905 40.58      
9 A 3219 2891 45.11      
10 A 2592 2327 26.97      
11 A 1639 1471 1.42      
12 A 1635 1468 6.89      
13 A 1626 1460 4.61      
14 A 1623 1458 8.39      
15 A 1617 1452 0.12      
16 A 1559 1400 1.37      
17 A 1554 1395 0.47      
18 A 1515 1360 1.67      
19 A 1471 1321 2.63      
20 A 1433 1287 6.57      
21 A 1391 1249 2.47      
22 A 1285 1154 2.62      
23 A 1236 1110 0.25      
24 A 1205 1082 6.11      
25 A 1117 1003 1.92      
26 A 1070 961 0.16      
27 A 1041 935 2.91      
28 A 955 858 1.22      
29 A 862 774 1.65      
30 A 813 730 2.85      
31 A 612 549 0.12      
32 A 573 515 1.70      
33 A 416 373 0.47      
34 A 346 311 1.29      
35 A 299 269 0.20      
36 A 229 205 0.07      
37 A 220 198 2.72      
38 A 179 161 6.84      
39 A 92 82 1.79      

Unscaled Zero Point Vibrational Energy (zpe) 30827.0 cm-1
Scaled (by 0.898) Zero Point Vibrational Energy (zpe) 27682.6 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 HF/CEP-31G*
ABC
0.21368 0.07268 0.05810

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-31G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -1.594 -0.362 0.120
N2 -2.650 -0.777 -0.081
C3 -0.156 1.636 -0.145
H4 -0.277 1.669 -1.228
H5 -0.943 2.239 0.307
H6 0.803 2.082 0.112
C7 2.275 -0.394 0.080
H8 2.418 -0.369 1.163
H9 2.960 -1.138 -0.329
H10 2.564 0.577 -0.323
C11 0.823 -0.763 -0.280
H12 0.691 -0.750 -1.363
H13 0.621 -1.782 0.051
C14 -0.222 0.180 0.367
H15 -0.088 0.173 1.448

Atom - Atom Distances (Å)
  C1 N2 C3 H4 H5 H6 C7 H8 H9 H10 C11 H12 H13 C14 H15
C11.15242.47602.77082.68863.42403.86964.14534.64184.28552.48262.75112.63221.49602.0786
N21.15243.47093.59613.48794.48794.94305.23455.62795.39253.47923.57863.42522.64843.1319
C32.47603.47091.09041.08931.08893.17583.51494.17642.92462.59502.80993.51081.54492.1637
H42.77083.59611.09041.76731.76973.53304.13884.37813.17522.83272.60923.78862.18283.0714
H52.68863.48791.08931.76731.76414.16494.33945.20073.93183.53263.79404.32262.18312.5111
H63.42404.48791.08891.76971.76412.88143.11753.90092.35702.87243.19533.86902.17622.4949
C73.86964.94303.17583.53304.16492.88141.09261.09051.09041.54082.17212.15882.57832.7883
H84.14535.23453.51494.13884.33943.11751.09261.76391.76722.18643.08332.54152.81112.5788
H94.64185.62794.17644.37815.20073.90091.09051.76391.75982.17052.52402.45573.51403.7635
H104.28555.39252.92463.17523.93182.35701.09041.76721.75982.19712.52003.07842.89723.2137
C112.48263.47922.59502.83273.53262.87241.54082.18642.17052.19711.09091.09011.54922.1658
H122.75113.57862.80992.60923.79403.19532.17213.08332.52402.52001.09091.75192.16563.0589
H132.63223.42523.51083.78864.32263.86902.15882.54152.45573.07841.09011.75192.15862.5047
C141.49602.64841.54492.18282.18312.17622.57832.81113.51402.89721.54922.16562.15861.0891
H152.07863.13192.16373.07142.51112.49492.78832.57883.76353.21372.16583.05892.50471.0891

picture of Butanenitrile, 2-methyl- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C14 C3 109.011 C1 C14 C11 109.213
C1 C14 H15 105.966 N2 C1 C14 179.470
C3 C14 C11 114.004 C3 C14 H15 109.236
H4 C3 H5 108.351 H4 C3 H6 108.597
H4 C3 C14 110.665 H5 C3 H6 108.170
H5 C3 C14 110.752 H6 C3 C14 110.228
C7 C11 H12 110.082 C7 C11 H13 109.081
C7 C11 C14 113.111 H8 C7 H9 107.800
H8 C7 H10 108.099 H8 C7 C11 111.113
H9 C7 H10 107.591 H9 C7 C11 109.972
H10 C7 C11 112.102 C11 C14 H15 109.102
H12 C11 H13 106.883 H12 C11 C14 108.995
H13 C11 C14 108.487
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.621      
2 N 0.332      
3 C -0.401      
4 H 0.123      
5 H 0.149      
6 H 0.139      
7 C -0.301      
8 H 0.097      
9 H 0.152      
10 H 0.098      
11 C -0.199      
12 H 0.107      
13 H 0.126      
14 C 0.068      
15 H 0.131      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  4.136 1.516 0.557 4.440
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -50.312 -4.539 -0.945
y -4.539 -38.005 -0.154
z -0.945 -0.154 -36.784
Traceless
 xyz
x -12.918 -4.539 -0.945
y -4.539 5.543 -0.154
z -0.945 -0.154 7.375
Polar
3z2-r214.749
x2-y2-12.307
xy-4.539
xz-0.945
yz-0.154


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 9.667 0.549 0.252
y 0.549 7.408 0.072
z 0.252 0.072 6.476


<r2> (average value of r2) Å2
<r2> 161.895
(<r2>)1/2 12.724