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 CH3CH(CH3)CN (Propanenitrile, 2-methyl-)

using model chemistry: B3PW91/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at B3PW91/3-21G*
 hartrees
Energy at 0K-210.151299
Energy at 298.15K-210.158729
HF Energy-210.151299
Nuclear repulsion energy158.701168
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 B3PW91/3-21G*
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' 3152 3024 19.86      
2 A' 3146 3018 23.86      
3 A' 3070 2946 3.93      
4 A' 3066 2942 9.94      
5 A' 2345 2250 4.23      
6 A' 1566 1503 16.98      
7 A' 1559 1496 11.57      
8 A' 1464 1405 7.47      
9 A' 1385 1329 2.08      
10 A' 1217 1168 6.14      
11 A' 1168 1120 11.56      
12 A' 937 899 1.36      
13 A' 783 751 0.43      
14 A' 593 569 1.85      
15 A' 363 349 0.15      
16 A' 301 289 0.84      
17 A' 239 229 0.81      
18 A" 3149 3021 10.50      
19 A" 3141 3014 1.48      
20 A" 3064 2940 13.29      
21 A" 1545 1483 2.42      
22 A" 1545 1482 3.94      
23 A" 1446 1387 11.84      
24 A" 1337 1282 0.07      
25 A" 1136 1090 3.96      
26 A" 993 953 0.32      
27 A" 971 931 4.73      
28 A" 622 597 0.42      
29 A" 235 225 0.06      
30 A" 216 207 2.66      

Unscaled Zero Point Vibrational Energy (zpe) 22877.3 cm-1
Scaled (by 0.9594) Zero Point Vibrational Energy (zpe) 21948.5 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 B3PW91/3-21G*
ABC
0.26421 0.13173 0.09667

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 0.153 -2.211 0.000
C2 -0.108 -1.075 0.000
C3 -0.417 0.353 0.000
C4 0.153 1.019 1.274
C5 0.153 1.019 -1.274
H6 -1.512 0.459 0.000
H7 -0.107 2.084 1.273
H8 -0.257 0.556 2.177
H9 1.244 0.922 1.290
H10 -0.107 2.084 -1.273
H11 -0.257 0.556 -2.177
H12 1.244 0.922 -1.290

Atom - Atom Distances (Å)
  N1 C2 C3 C4 C5 H6 H7 H8 H9 H10 H11 H12
N11.16552.62703.47293.47293.14654.48763.54473.55984.48763.54473.5598
C21.16551.46152.46552.46552.07953.40632.72432.73503.40632.72432.7350
C32.62701.46151.54651.54651.09942.17122.19222.17872.17122.19222.1787
C43.47292.46551.54652.54752.16961.09571.09481.09532.77273.50572.7877
C53.47292.46551.54652.54752.16962.77273.50572.78771.09571.09481.0953
H63.14652.07951.09942.16962.16962.49722.51433.07732.49722.51433.0773
H74.48763.40632.17121.09572.77272.49721.78171.78162.54653.77643.1214
H83.54472.72432.19221.09483.50572.51431.78171.78143.77644.35383.7954
H93.55982.73502.17871.09532.78773.07731.78161.78143.12143.79542.5797
H104.48763.40632.17122.77271.09572.49722.54653.77643.12141.78171.7816
H113.54472.72432.19223.50571.09482.51433.77644.35383.79541.78171.7814
H123.55982.73502.17872.78771.09533.07733.12143.79542.57971.78161.7814

picture of Propanenitrile, 2-methyl- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 C3 179.306 C2 C3 C4 110.065
C2 C3 C5 110.065 C2 C3 H6 107.751
C3 C4 H7 109.324 C3 C4 H8 111.031
C3 C4 H9 109.937 C3 C5 H10 109.324
C3 C5 H11 111.031 C3 C5 H12 109.937
C4 C3 C5 110.899 C4 C3 H6 108.995
C5 C3 H6 108.995 H7 C4 H8 108.846
H7 C4 H9 108.806 H8 C4 H9 108.856
H10 C5 H11 108.846 H10 C5 H12 108.806
H11 C5 H12 108.856
Electronic energy levels

Electronic state

Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.497      
2 C 0.400      
3 C -0.395      
4 C -0.577      
5 C -0.577      
6 H 0.276      
7 H 0.222      
8 H 0.233      
9 H 0.230      
10 H 0.222      
11 H 0.233      
12 H 0.230      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.629 3.737 0.000 3.790
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -30.040 0.739 0.000
y 0.739 -38.820 0.000
z 0.000 0.000 -29.716
Traceless
 xyz
x 4.228 0.739 0.000
y 0.739 -8.942 0.000
z 0.000 0.000 4.714
Polar
3z2-r29.428
x2-y28.780
xy0.739
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.028 -0.347 0.000
y -0.347 7.611 0.000
z 0.000 0.000 5.633


<r2> (average value of r2) Å2
<r2> 128.737
(<r2>)1/2 11.346