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: HF/CEP-121G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at HF/CEP-121G
 hartrees
Energy at 0K-61.484068
Energy at 298.15K-61.493706
Nuclear repulsion energy139.365817
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/CEP-121G
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 3920 3577 164.19      
2 A 3863 3525 10.42      
3 A 3743 3416 4.24      
4 A 3281 2994 19.20      
5 A 3247 2963 53.81      
6 A 3214 2933 12.55      
7 A 3157 2881 29.00      
8 A 1890 1725 328.00      
9 A 1842 1680 72.52      
10 A 1638 1494 8.16      
11 A 1634 1491 6.97      
12 A 1555 1419 8.56      
13 A 1495 1365 24.89      
14 A 1472 1343 48.01      
15 A 1428 1303 393.13      
16 A 1371 1251 79.48      
17 A 1304 1190 13.68      
18 A 1235 1127 17.65      
19 A 1150 1049 41.54      
20 A 1096 1000 0.90      
21 A 1004 916 38.80      
22 A 877 800 129.84      
23 A 834 761 75.35      
24 A 803 733 219.20      
25 A 777 709 16.03      
26 A 654 597 14.58      
27 A 565 516 7.65      
28 A 410 374 0.84      
29 A 348 318 12.17      
30 A 291 266 18.29      
31 A 270 247 2.79      
32 A 248 227 2.44      
33 A 49 45 1.27      

Unscaled Zero Point Vibrational Energy (zpe) 25331.3 cm-1
Scaled (by 0.9125) Zero Point Vibrational Energy (zpe) 23114.8 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 HF/CEP-121G
ABC
0.16300 0.10543 0.07580

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/CEP-121G

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -1.280 1.144 -0.279
C2 -1.280 -1.219 0.500
C3 -0.631 -0.171 -0.429
C4 0.866 -0.056 -0.092
O5 1.230 1.065 0.577
O6 1.673 -0.924 -0.381
H7 -2.149 1.135 0.212
H8 -1.331 1.694 -1.111
H9 -0.756 -2.163 0.424
H10 -1.246 -0.890 1.535
H11 -0.685 -0.531 -1.451
H12 -2.317 -1.373 0.218
H13 0.492 1.668 0.683

Atom - Atom Distances (Å)
  N1 C2 C3 C4 O5 O6 H7 H8 H9 H10 H11 H12 H13
N12.48731.47372.46592.65313.60580.99840.99933.42062.72522.12862.76642.0831
C22.48731.54322.51133.39393.09542.52513.32921.08241.08662.15221.08573.3920
C31.47371.54321.53912.45032.42412.10252.10582.17042.18021.08432.16882.4249
C42.46592.51131.53911.35541.21923.25642.98842.70852.79372.11593.45841.9271
O52.65313.39392.45031.35542.25153.39973.13123.79293.29693.21324.31860.9590
O63.60583.09542.42411.21922.25154.38134.05062.84323.49212.61824.05923.0404
H70.99842.52512.10253.25643.39974.38131.65343.58592.58162.77172.51272.7355
H80.99933.32922.10582.98843.13124.05061.65344.19103.69972.34183.48492.5576
H93.42061.08242.17042.70853.79292.84323.58594.19101.75962.48631.76144.0375
H102.72521.08662.18022.79373.29693.49212.58163.69971.75963.05921.76493.2080
H112.12862.15221.08432.11593.21322.61822.77172.34182.48633.05922.48103.2820
H122.76641.08572.16883.45844.31864.05922.51273.48491.76141.76492.48104.1655
H132.08313.39202.42491.92710.95903.04042.73552.55764.03753.20803.28204.1655

picture of Alanine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C3 C2 111.044 N1 C3 C4 109.846
N1 C3 H11 111.734 C2 C3 C4 109.125
C2 C3 H11 108.729 C3 N1 H7 115.177
C3 N1 H8 115.413 C3 C2 H9 110.267
C3 C2 H10 110.805 C3 C2 H12 109.953
C3 C4 O5 115.524 C3 C4 O6 122.578
C4 C3 H11 106.218 C4 O5 H13 111.601
O5 C4 O6 121.884 H7 N1 H8 111.718
H9 C2 H10 108.432 H9 C2 H12 108.660
H10 C2 H12 108.669
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-121G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.814      
2 C -0.543      
3 C -0.001      
4 C 0.375      
5 O -0.504      
6 O -0.294      
7 H 0.322      
8 H 0.316      
9 H 0.204      
10 H 0.162      
11 H 0.175      
12 H 0.163      
13 H 0.440      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -6.425 1.706 -0.575 6.672
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -43.000 0.942 0.391
y 0.942 -36.208 -2.749
z 0.391 -2.749 -34.950
Traceless
 xyz
x -7.422 0.942 0.391
y 0.942 2.768 -2.749
z 0.391 -2.749 4.654
Polar
3z2-r29.308
x2-y2-6.793
xy0.942
xz0.391
yz-2.749


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.590 -0.542 -0.236
y -0.542 6.715 0.354
z -0.236 0.354 5.393


<r2> (average value of r2) Å2
<r2> 136.100
(<r2>)1/2 11.666