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: MP2=FULL/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=FULL/6-31G
 hartrees
Energy at 0K-322.353313
Energy at 298.15K-322.362770
Nuclear repulsion energy245.837019
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=FULL/6-31G
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 3648 3466 8.97      
2 A 3527 3351 1.67      
3 A 3345 3178 201.47      
4 A 3181 3022 7.11      
5 A 3148 2991 27.23      
6 A 3076 2922 11.54      
7 A 3064 2911 13.90      
8 A 1744 1657 28.70      
9 A 1727 1641 173.03      
10 A 1573 1495 9.80      
11 A 1566 1488 3.46      
12 A 1480 1406 9.84      
13 A 1429 1358 4.65      
14 A 1379 1310 147.52      
15 A 1346 1278 258.98      
16 A 1272 1209 8.10      
17 A 1221 1160 17.43      
18 A 1164 1106 14.13      
19 A 1090 1035 55.83      
20 A 1055 1002 1.01      
21 A 963 915 70.10      
22 A 888 844 144.28      
23 A 834 792 165.72      
24 A 790 751 6.94      
25 A 709 673 10.57      
26 A 554 526 5.91      
27 A 530 504 1.42      
28 A 413 392 4.08      
29 A 357 339 11.35      
30 A 299 284 12.32      
31 A 279 265 14.80      
32 A 239 227 0.40      
33 A 59 56 1.25      

Unscaled Zero Point Vibrational Energy (zpe) 23973.5 cm-1
Scaled (by 0.9501) Zero Point Vibrational Energy (zpe) 22777.2 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=FULL/6-31G
ABC
0.15573 0.11217 0.06986

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 1.112 1.339 -0.008
C2 1.463 -1.179 -0.237
C3 0.657 -0.024 0.391
C4 -0.853 -0.158 0.062
O5 -1.488 1.045 -0.192
O6 -1.456 -1.249 0.058
H7 1.497 1.371 -0.952
H8 1.748 1.775 0.655
H9 1.035 -2.143 0.059
H10 1.424 -1.111 -1.334
H11 0.734 -0.083 1.488
H12 2.511 -1.130 0.083
H13 -0.778 1.746 -0.165

Atom - Atom Distances (Å)
  N1 C2 C3 C4 O5 O6 H7 H8 H9 H10 H11 H12 H13
N12.55271.49182.47122.62373.64711.01961.01643.48402.80362.09902.83981.9398
C22.55271.54242.54823.69532.93462.64843.09881.09571.09992.17031.09793.6854
C31.49181.54241.55062.46652.46502.11112.12022.17852.17941.10142.18172.3453
C42.47122.54821.55061.38361.24732.98113.29362.73992.83602.13513.50211.9189
O52.62373.69532.46651.38362.30793.09803.42364.07373.79943.00594.56140.9989
O63.64712.93462.46501.24732.30794.07554.44582.64693.20242.86403.96963.0795
H71.01962.64842.11112.98113.09804.07551.67553.68582.51262.94132.89072.4365
H81.01643.09882.12023.29363.42364.44581.67554.02693.52032.27463.05792.6552
H93.48401.09572.17852.73994.07372.64693.68584.02691.77712.52571.79074.2972
H102.80361.09992.17942.83603.79943.20242.51263.52031.77713.08261.78693.7923
H112.09902.17031.10142.13513.00592.86402.94132.27462.52573.08262.49622.8923
H122.83981.09792.18173.50214.56143.96962.89073.05791.79071.78692.49624.3768
H131.93983.68542.34531.91890.99893.07952.43652.65524.29723.79232.89234.3768

picture of Alanine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C3 C2 114.544 N1 C3 C4 108.616
N1 C3 H11 107.120 C2 C3 C4 110.943
C2 C3 H11 109.213 C3 N1 H7 113.066
C3 N1 H8 114.071 C3 C2 H9 110.184
C3 C2 H10 110.007 C3 C2 H12 110.306
C3 C4 O5 114.282 C3 C4 O6 123.161
C4 C3 H11 105.994 C4 O5 H13 106.171
O5 C4 O6 122.532 H7 N1 H8 110.760
H9 C2 H10 108.073 H9 C2 H12 109.441
H10 C2 H12 108.785
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability