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All results from a given calculation for CH3CH(NH2)COOH (Alanine)

using model chemistry: MP2/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at MP2/6-31G**
 hartrees
Energy at 0K-322.832200
Energy at 298.15K-322.841797
HF Energy-321.879691
Nuclear repulsion energy250.052115
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 MP2/6-31G**
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 3683 3449 7.36      
2 A 3581 3354 67.43      
3 A 3565 3338 181.09      
4 A 3255 3048 5.87      
5 A 3223 3018 22.01      
6 A 3136 2937 14.81      
7 A 3131 2932 8.90      
8 A 1866 1748 211.97      
9 A 1695 1587 35.29      
10 A 1557 1458 11.35      
11 A 1550 1452 2.38      
12 A 1458 1366 28.48      
13 A 1451 1358 351.52      
14 A 1429 1338 27.90      
15 A 1362 1276 47.79      
16 A 1275 1194 6.46      
17 A 1243 1164 8.08      
18 A 1190 1114 6.05      
19 A 1133 1061 51.26      
20 A 1046 980 0.89      
21 A 974 912 58.48      
22 A 920 862 75.77      
23 A 874 818 97.45      
24 A 819 767 15.29      
25 A 736 689 9.29      
26 A 563 527 7.82      
27 A 540 506 0.80      
28 A 419 392 6.10      
29 A 366 343 19.53      
30 A 309 289 14.89      
31 A 285 267 14.64      
32 A 244 229 1.27      
33 A 76 71 1.38      

Unscaled Zero Point Vibrational Energy (zpe) 24475.1 cm-1
Scaled (by 0.9365) Zero Point Vibrational Energy (zpe) 22920.9 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 MP2/6-31G**
ABC
0.16170 0.11611 0.07195

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G**

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 1.057 1.357 -0.056
C2 1.471 -1.136 -0.179
C3 0.645 0.014 0.378
C4 -0.845 -0.170 0.053
O5 -1.508 0.989 -0.123
O6 -1.383 -1.260 -0.003
H7 1.351 1.327 -1.028
H8 1.854 1.679 0.480
H9 1.071 -2.086 0.166
H10 1.432 -1.131 -1.269
H11 0.702 0.005 1.471
H12 2.510 -1.047 0.134
H13 -0.810 1.678 -0.066

Atom - Atom Distances (Å)
  N1 C2 C3 C4 O5 O6 H7 H8 H9 H10 H11 H12 H13
N12.53051.47102.44172.59203.57791.01591.01303.45072.79372.07072.81581.8942
C22.53051.52132.51993.65942.86132.60782.91611.08671.09052.14791.08913.6243
C31.47101.52131.53622.41612.42432.04962.06032.15342.15501.09402.15962.2551
C42.44172.51991.53621.34661.21632.86933.29932.71252.80322.10583.46891.8525
O52.59203.65942.41611.34662.25533.01803.48474.02413.80172.89724.51180.9828
O63.57792.86132.42431.21632.25533.90064.39802.59483.08912.84873.90092.9940
H71.01592.60782.04962.86933.01803.90061.62783.62652.47122.90072.88562.3919
H81.01302.91612.06033.29933.48474.39801.62783.85833.33642.26112.82482.7194
H93.45071.08672.15342.71254.02412.59483.62653.85831.76042.49241.77524.2149
H102.79371.09052.15502.80323.80173.08912.47123.33641.76043.05431.77073.7908
H112.07072.14791.09402.10582.89722.84872.90072.26112.49243.05432.48262.7293
H122.81581.08912.15963.46894.51183.90092.88562.82481.77521.77072.48264.3001
H131.89423.62432.25511.85250.98282.99402.39192.71944.21493.79082.72934.3001

picture of Alanine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C3 C2 115.475 N1 C3 C4 108.552
N1 C3 H11 106.743 C2 C3 C4 111.007
C2 C3 H11 109.341 C3 N1 H7 109.654
C3 N1 H8 110.724 C3 C2 H9 110.204
C3 C2 H10 110.106 C3 C2 H12 110.552
C3 C4 O5 113.720 C3 C4 O6 123.050
C4 C3 H11 105.142 C4 O5 H13 104.271
O5 C4 O6 123.199 H7 N1 H8 106.702
H9 C2 H10 107.912 H9 C2 H12 109.348
H10 C2 H12 108.661
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability