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 C4H5N ((E)-2-Butenenitrile)

using model chemistry: MP2/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/3-21G
 hartrees
Energy at 0K-208.116773
Energy at 298.15K-208.121312
HF Energy-207.638102
Nuclear repulsion energy136.949435
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 MP2/3-21G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A' 3194 3049 7.26      
2 A' 3183 3038 5.84      
3 A' 3154 3011 8.32      
4 A' 3079 2939 9.53      
5 A' 2139 2042 3.81      
6 A' 1691 1614 2.18      
7 A' 1590 1518 10.92      
8 A' 1496 1428 4.72      
9 A' 1388 1325 0.12      
10 A' 1383 1320 0.03      
11 A' 1160 1107 1.85      
12 A' 1012 966 3.63      
13 A' 930 887 5.43      
14 A' 581 554 0.01      
15 A' 413 394 0.95      
16 A' 193 184 2.75      
17 A" 3143 3000 11.38      
18 A" 1581 1509 8.51      
19 A" 1134 1082 0.25      
20 A" 1014 968 51.42      
21 A" 834 796 0.22      
22 A" 523 499 2.35      
23 A" 186 178 1.33      
24 A" 180 172 0.01      

Unscaled Zero Point Vibrational Energy (zpe) 17589.7 cm-1
Scaled (by 0.9545) Zero Point Vibrational Energy (zpe) 16789.3 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 MP2/3-21G
ABC
1.26933 0.07478 0.07157

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 2.647 0.455 0.000
H2 2.674 -1.088 0.886
H3 2.674 -1.088 -0.886
C4 2.280 -0.577 0.000
H5 0.290 -1.586 0.000
C6 0.764 -0.606 0.000
H7 0.459 1.490 0.000
C8 0.000 0.503 0.000
N9 -2.627 0.440 0.000
C10 -1.437 0.470 0.000

Atom - Atom Distances (Å)
  H1 H2 H3 C4 H5 C6 H7 C8 N9 C10
H11.78011.78011.09543.11822.16072.41972.64705.27324.0838
H21.78011.77251.09622.59162.15953.51233.23535.58684.4845
H31.78011.77251.09622.59162.15953.51233.23535.58684.4845
C41.09541.09621.09622.23181.51612.75472.52325.01103.8619
H53.11822.59162.59162.23181.08943.08112.10983.55112.6850
C62.16072.15952.15951.51611.08942.11801.34723.54852.4502
H72.41973.51233.51232.75473.08112.11801.08833.25982.1535
C82.64703.23533.23532.52322.10981.34721.08832.62741.4375
N95.27325.58685.58685.01103.55113.54853.25982.62741.1899
C104.08384.48454.48453.86192.68502.45022.15351.43751.1899

picture of (E)-2-Butenenitrile state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H1 C4 H2 108.632 H1 C4 H3 108.632
H1 C4 C6 110.633 H2 C4 H3 107.900
H2 C4 C6 110.483 H3 C4 C6 110.483
C4 C6 H5 116.923 C4 C6 C8 123.477
H5 C6 C8 119.600 C6 C8 H7 120.467
C6 C8 C10 123.222 H7 C8 C10 116.311
C8 C10 N9 179.903
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at MP2/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.199     0.094
2 H 0.211     0.089
3 H 0.211     0.089
4 C -0.584     -0.245
5 H 0.211     0.105
6 C -0.131     0.085
7 H 0.234     0.246
8 C -0.182     -0.525
9 N -0.416     -0.445
10 C 0.247     0.506


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  3.931 -0.430 0.000 3.954
CHELPG        
AIM        
ESP 3.929 -0.401 0.000 3.950


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -38.533 0.788 0.000
y 0.788 -27.817 0.000
z 0.000 0.000 -31.422
Traceless
 xyz
x -8.913 0.788 0.000
y 0.788 7.161 0.000
z 0.000 0.000 1.753
Polar
3z2-r23.505
x2-y2-10.716
xy0.788
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 8.932 -1.279 0.000
y -1.279 5.494 0.000
z 0.000 0.000 3.075


<r2> (average value of r2) Å2
<r2> 154.841
(<r2>)1/2 12.443