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/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 HF/6-311G*
 hartrees
Energy at 0K-321.940703
Energy at 298.15K-321.950526
Nuclear repulsion energy252.097607
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/6-311G*
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A 4047 3660 166.81      
2 A 3836 3469 5.61      
3 A 3753 3394 1.73      
4 A 3293 2978 18.62      
5 A 3243 2933 55.81      
6 A 3201 2895 17.16      
7 A 3186 2881 27.19      
8 A 2037 1842 382.54      
9 A 1854 1677 48.68      
10 A 1633 1477 16.47      
11 A 1624 1469 2.77      
12 A 1560 1411 381.24      
13 A 1552 1404 9.93      
14 A 1527 1381 120.14      
15 A 1456 1317 68.18      
16 A 1345 1216 6.55      
17 A 1326 1200 7.86      
18 A 1255 1135 15.54      
19 A 1192 1078 72.86      
20 A 1103 998 1.14      
21 A 1021 924 65.52      
22 A 975 882 83.63      
23 A 884 800 5.04      
24 A 815 737 21.84      
25 A 807 730 150.78      
26 A 602 545 13.03      
27 A 572 517 2.17      
28 A 440 398 7.35      
29 A 392 355 14.03      
30 A 310 281 18.01      
31 A 303 274 10.85      
32 A 253 229 1.09      
33 A 71 64 1.46      

Unscaled Zero Point Vibrational Energy (zpe) 25734.3 cm-1
Scaled (by 0.9044) Zero Point Vibrational Energy (zpe) 23274.1 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/6-311G*
ABC
0.16613 0.11600 0.07254

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 1.031 1.376 -0.078
C2 1.507 -1.097 -0.153
C3 0.637 0.042 0.367
C4 -0.844 -0.190 0.047
O5 -1.555 0.912 -0.097
O6 -1.321 -1.266 -0.025
H7 1.315 1.369 -1.036
H8 1.796 1.728 0.456
H9 1.160 -2.050 0.221
H10 1.481 -1.139 -1.238
H11 0.679 0.050 1.452
H12 2.536 -0.953 0.157
H13 -0.981 1.663 -0.051

Atom - Atom Distances (Å)
  N1 C2 C3 C4 O5 O6 H7 H8 H9 H10 H11 H12 H13
N12.51991.46072.44632.62803.53770.99970.99703.44142.80642.05552.78272.0330
C22.51991.52462.52713.66232.83522.62672.90501.08051.08582.14001.08493.7173
C31.46071.52461.53242.40352.38652.04702.04812.16092.16401.08682.15382.3283
C42.44632.52711.53241.31941.17892.87513.28862.73902.82092.08643.46621.8608
O52.62803.66232.40351.31942.19113.05473.49334.03003.83752.85274.50300.9468
O63.53772.83522.38651.17892.19113.86214.34842.61293.05612.81313.87352.9486
H70.99972.62672.04702.87513.05473.86211.60883.64612.52192.88782.88212.5162
H80.99702.90502.04813.28863.49334.34841.60883.83843.34552.24842.79732.8239
H93.44141.08052.16092.73904.03002.61293.64613.83841.74952.48141.76094.2945
H102.80641.08582.16402.82093.83753.05612.52193.34551.74953.04901.75893.9147
H112.05552.14001.08682.08642.85272.81312.88782.24842.48143.04902.47582.7606
H122.78271.08492.15383.46624.50303.87352.88212.79731.76091.75892.47584.3881
H132.03303.71732.32831.86080.94682.94862.51622.82394.29453.91472.76064.3881

picture of Alanine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C3 C2 115.138 N1 C3 C4 109.616
N1 C3 H11 106.661 C2 C3 C4 111.519
C2 C3 H11 108.911 C3 N1 H7 111.224
C3 N1 H8 111.496 C3 C2 H9 110.950
C3 C2 H10 110.875 C3 C2 H12 110.119
C3 C4 O5 114.676 C3 C4 O6 122.808
C4 C3 H11 104.319 C4 O5 H13 109.299
O5 C4 O6 122.477 H7 N1 H8 107.366
H9 C2 H10 107.724 H9 C2 H12 108.829
H10 C2 H12 108.257
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.888      
2 C -0.597      
3 C -0.198      
4 C 0.659      
5 O -0.620      
6 O -0.442      
7 H 0.352      
8 H 0.361      
9 H 0.249      
10 H 0.208      
11 H 0.244      
12 H 0.205      
13 H 0.467      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  4.891 2.554 0.374 5.530
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -39.907 -0.882 -0.489
y -0.882 -38.077 -0.404
z -0.489 -0.404 -33.478
Traceless
 xyz
x -4.129 -0.882 -0.489
y -0.882 -1.385 -0.404
z -0.489 -0.404 5.514
Polar
3z2-r211.028
x2-y2-1.829
xy-0.882
xz-0.489
yz-0.404


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.309 0.237 0.070
y 0.237 6.955 0.006
z 0.070 0.006 5.132


<r2> (average value of r2) Å2
<r2> 161.122
(<r2>)1/2 12.693