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: HF/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 HF/3-21G*
 hartrees
Energy at 0K-207.645645
Energy at 298.15K-207.650461
Nuclear repulsion energy139.414269
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/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' 3357 3030 4.80      
2 A' 3338 3013 5.12      
3 A' 3275 2956 11.27      
4 A' 3197 2885 12.90      
5 A' 2582 2330 27.13      
6 A' 1859 1678 17.64      
7 A' 1655 1494 17.56      
8 A' 1583 1429 5.06      
9 A' 1480 1336 1.41      
10 A' 1468 1325 0.52      
11 A' 1235 1115 2.04      
12 A' 1074 969 4.97      
13 A' 991 895 5.68      
14 A' 643 581 0.07      
15 A' 449 405 1.74      
16 A' 212 191 3.72      
17 A" 3244 2928 13.09      
18 A" 1651 1490 11.92      
19 A" 1225 1105 0.00      
20 A" 1120 1011 68.09      
21 A" 965 871 2.08      
22 A" 608 548 3.61      
23 A" 201 182 0.80      
24 A" 187 169 0.76      

Unscaled Zero Point Vibrational Energy (zpe) 18798.0 cm-1
Scaled (by 0.9026) Zero Point Vibrational Energy (zpe) 16967.1 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/3-21G*
ABC
1.30771 0.07735 0.07402

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

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
H1 2.640 0.419 0.000
H2 2.622 -1.108 0.875
H3 2.622 -1.108 -0.875
C4 2.245 -0.588 0.000
H5 0.263 -1.554 0.000
C6 0.741 -0.591 0.000
H7 0.445 1.479 0.000
C8 0.000 0.502 0.000
N9 -2.566 0.446 0.000
C10 -1.425 0.469 0.000

Atom - Atom Distances (Å)
  H1 H2 H3 C4 H5 C6 H7 C8 N9 C10
H11.76051.76051.08233.08952.15102.43702.64105.20544.0650
H21.76051.75091.08522.55522.13773.49213.19865.48534.4303
H31.76051.75091.08522.55522.13773.49213.19865.48534.4303
C41.08231.08521.08522.20531.50442.74132.49624.92103.8197
H53.08952.55522.55522.20531.07513.03842.07303.46442.6349
C62.15102.13772.13771.50441.07512.09111.32083.46552.4116
H72.43703.49213.49212.74133.03842.09111.07323.18262.1251
C82.64103.19863.19862.49622.07301.32081.07322.56621.4254
N95.20545.48535.48534.92103.46443.46553.18262.56621.1408
C104.06504.43034.43033.81972.63492.41162.12511.42541.1408

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 108.629 H1 C4 H3 108.629
H1 C4 C6 111.476 H2 C4 H3 107.549
H2 C4 C6 110.225 H3 C4 C6 110.225
C4 C6 H5 116.516 C4 C6 C8 124.016
H5 C6 C8 119.468 C6 C8 H7 121.382
C6 C8 C10 122.800 H7 C8 C10 115.818
C8 C10 N9 179.820
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 H 0.225 0.069    
2 H 0.235 0.060    
3 H 0.235 0.060    
4 C -0.634 -0.124    
5 H 0.259 0.121    
6 C -0.163 0.051    
7 H 0.276 0.231    
8 C -0.208 -0.501    
9 N -0.512 -0.532    
10 C 0.286 0.565    


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  4.580 -0.682 0.000 4.630
CHELPG 4.564 -0.636 0.000 4.608
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -39.199 0.917 0.000
y 0.917 -27.388 0.000
z 0.000 0.000 -31.495
Traceless
 xyz
x -9.758 0.917 0.000
y 0.917 7.959 0.000
z 0.000 0.000 1.798
Polar
3z2-r23.596
x2-y2-11.811
xy0.917
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 9.216 -1.698 0.000
y -1.698 5.741 0.000
z 0.000 0.000 3.012


<r2> (average value of r2) Å2
<r2> 150.372
(<r2>)1/2 12.263