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(NH2)COOH (Alanine)

using model chemistry: mPW1PW91/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at mPW1PW91/6-311G*
 hartrees
Energy at 0K-323.742849
Energy at 298.15K-323.752429
Nuclear repulsion energy251.062223
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 mPW1PW91/6-311G*
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 3641 3475 5.35      
2 A 3552 3390 0.25      
3 A 3475 3316 230.17      
4 A 3168 3024 8.91      
5 A 3132 2989 32.18      
6 A 3070 2930 18.08      
7 A 3061 2921 13.37      
8 A 1893 1807 309.08      
9 A 1719 1641 46.77      
10 A 1519 1450 18.97      
11 A 1508 1440 5.18      
12 A 1469 1402 449.52      
13 A 1423 1358 14.89      
14 A 1410 1345 2.06      
15 A 1331 1270 9.99      
16 A 1256 1199 10.12      
17 A 1236 1179 11.58      
18 A 1172 1119 10.44      
19 A 1115 1064 49.66      
20 A 1029 982 1.22      
21 A 952 909 58.46      
22 A 918 876 70.72      
23 A 886 845 117.83      
24 A 819 782 9.41      
25 A 750 716 9.06      
26 A 572 546 5.43      
27 A 540 515 1.02      
28 A 411 392 5.31      
29 A 375 358 16.46      
30 A 316 301 13.48      
31 A 278 265 12.34      
32 A 228 218 0.37      
33 A 76 72 1.22      

Unscaled Zero Point Vibrational Energy (zpe) 24148.6 cm-1
Scaled (by 0.9544) Zero Point Vibrational Energy (zpe) 23047.5 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 mPW1PW91/6-311G*
ABC
0.16317 0.11647 0.07247

See section I.F.4 to change rotational constant units
Geometric Data calculated at mPW1PW91/6-311G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 1.063 1.345 -0.035
C2 1.462 -1.145 -0.197
C3 0.642 0.001 0.371
C4 -0.854 -0.166 0.053
O5 -1.480 0.990 -0.151
O6 -1.403 -1.231 0.024
H7 1.414 1.338 -0.985
H8 1.799 1.704 0.556
H9 1.044 -2.101 0.116
H10 1.451 -1.126 -1.290
H11 0.694 -0.030 1.466
H12 2.499 -1.086 0.139
H13 -0.780 1.675 -0.104

Atom - Atom Distances (Å)
  N1 C2 C3 C4 O5 O6 H7 H8 H9 H10 H11 H12 H13
N12.52731.46602.44282.57003.56631.01291.00993.44982.79822.06872.82851.8733
C22.52731.51952.52663.63512.87422.60632.96611.08901.09362.14361.09193.6039
C31.46601.51951.53862.39842.41212.05542.06712.15562.16441.09592.16432.2470
C42.44282.52661.53861.33051.19792.91273.28492.71142.83512.10043.47801.8497
O52.57003.63512.39841.33052.22923.03113.42943.99983.78992.89504.49700.9806
O63.56632.87422.41211.19792.22923.94354.37572.59883.14382.81343.90622.9748
H71.01292.60632.05542.91273.03113.94351.63043.63052.48302.89792.88402.3877
H81.00992.96612.06713.28493.42944.37571.63043.90413.39622.24842.90592.6620
H93.44981.08902.15562.71143.99982.59883.63053.90411.75922.49641.77454.1996
H102.79821.09362.16442.83513.78993.14382.48303.39621.75923.06031.77233.7721
H112.06872.14361.09592.10042.89502.81342.89792.24842.49643.06032.47602.7465
H122.82851.09192.16433.47804.49703.90622.88402.90591.77451.77232.47604.2931
H131.87333.60392.24701.84970.98062.97482.38772.66204.19963.77212.74654.2931

picture of Alanine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C3 C2 115.661 N1 C3 C4 108.763
N1 C3 H11 106.818 C2 C3 C4 111.417
C2 C3 H11 109.014 C3 N1 H7 110.692
C3 N1 H8 111.889 C3 C2 H9 110.365
C3 C2 H10 110.789 C3 C2 H12 110.882
C3 C4 O5 113.225 C3 C4 O6 123.151
C4 C3 H11 104.482 C4 O5 H13 105.316
O5 C4 O6 123.601 H7 N1 H8 107.415
H9 C2 H10 107.417 H9 C2 H12 108.907
H10 C2 H12 108.381
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at mPW1PW91/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.831      
2 C -0.648      
3 C -0.262      
4 C 0.506      
5 O -0.506      
6 O -0.351      
7 H 0.349      
8 H 0.356      
9 H 0.260      
10 H 0.223      
11 H 0.260      
12 H 0.220      
13 H 0.424      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  5.010 2.236 0.334 5.496
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -39.258 0.002 -0.343
y 0.002 -37.368 -0.102
z -0.343 -0.102 -33.417
Traceless
 xyz
x -3.866 0.002 -0.343
y 0.002 -1.030 -0.102
z -0.343 -0.102 4.896
Polar
3z2-r29.792
x2-y2-1.890
xy0.002
xz-0.343
yz-0.102


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.059 0.179 0.078
y 0.179 7.561 -0.044
z 0.078 -0.044 5.395


<r2> (average value of r2) Å2
<r2> 161.604
(<r2>)1/2 12.712