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: B3LYP/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 B3LYP/3-21G
 hartrees
Energy at 0K-209.002374
Energy at 298.15K-209.006964
Nuclear repulsion energy138.141107
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 B3LYP/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' 3179 3068 10.65      
2 A' 3167 3056 0.86      
3 A' 3126 3016 9.30      
4 A' 3042 2935 9.44      
5 A' 2332 2250 11.58      
6 A' 1704 1644 14.63      
7 A' 1549 1495 18.58      
8 A' 1465 1413 6.67      
9 A' 1371 1323 0.81      
10 A' 1361 1313 0.00      
11 A' 1150 1110 1.85      
12 A' 1037 1000 5.83      
13 A' 930 898 8.17      
14 A' 596 575 0.03      
15 A' 417 403 1.25      
16 A' 193 187 2.51      
17 A" 3085 2977 10.49      
18 A" 1544 1489 11.31      
19 A" 1109 1070 1.19      
20 A" 1007 971 52.24      
21 A" 855 825 1.01      
22 A" 562 542 2.85      
23 A" 192 185 1.66      
24 A" 180 174 0.00      

Unscaled Zero Point Vibrational Energy (zpe) 17575.7 cm-1
Scaled (by 0.9649) Zero Point Vibrational Energy (zpe) 16958.8 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 B3LYP/3-21G
ABC
1.28846 0.07612 0.07285

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYP/3-21G

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 2.652 0.403 0.000
H2 2.634 -1.142 0.883
H3 2.634 -1.142 -0.883
C4 2.251 -0.614 0.000
H5 0.256 -1.582 0.000
C6 0.747 -0.612 0.000
H7 0.471 1.481 0.000
C8 0.000 0.501 0.000
N9 -2.587 0.486 0.000
C10 -1.421 0.490 0.000

Atom - Atom Distances (Å)
  H1 H2 H3 C4 H5 C6 H7 C8 N9 C10
H11.78031.78031.09393.11192.15852.43212.65375.24004.0735
H21.78031.76621.09772.57422.14913.51203.22725.53974.4586
H31.78031.76621.09772.57422.14913.51203.22725.53974.4586
C41.09391.09771.09772.21751.50362.74872.51214.96193.8340
H53.11192.57422.57422.21751.08753.07052.09893.51602.6654
C62.15852.14912.14911.50361.08752.11091.34073.51082.4319
H72.43213.51203.51202.74873.07052.11091.08723.21652.1358
C82.65373.22723.22722.51212.09891.34071.08722.58751.4207
N95.24005.53975.53974.96193.51603.51083.21652.58751.1668
C104.07354.45864.45863.83402.66542.43192.13581.42071.1668

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 108.647 H1 C4 H3 108.647
H1 C4 C6 111.421 H2 C4 H3 107.127
H2 C4 C6 110.437 H3 C4 C6 110.437
C4 C6 H5 116.780 C4 C6 C8 123.958
H5 C6 C8 119.262 C6 C8 H7 120.431
C6 C8 C10 123.422 H7 C8 C10 116.148
C8 C10 N9 179.732
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYP/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.208     0.110
2 H 0.221     0.104
3 H 0.221     0.104
4 C -0.607     -0.286
5 H 0.215     0.113
6 C -0.120     0.104
7 H 0.231     0.254
8 C -0.172     -0.546
9 N -0.481     -0.452
10 C 0.284     0.496


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  4.260 -0.670 0.000 4.313
CHELPG        
AIM        
ESP 4.258 -0.641 0.000 4.306


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -37.447 0.910 0.000
y 0.910 -27.073 0.000
z 0.000 0.000 -30.839
Traceless
 xyz
x -8.490 0.910 0.000
y 0.910 7.069 0.000
z 0.000 0.000 1.421
Polar
3z2-r22.842
x2-y2-10.373
xy0.910
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 9.960 -1.734 0.000
y -1.734 5.781 0.000
z 0.000 0.000 3.109


<r2> (average value of r2) Å2
<r2> 151.905
(<r2>)1/2 12.325