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-322.793527
Energy at 298.15K-322.803138
HF Energy-321.859145
Nuclear repulsion energy249.942489
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
4/u)
Dep P Dep U
1 A 3623 3414 8.62      
2 A 3520 3317 0.87      
3 A 3453 3254 251.59      
4 A 3228 3042 4.66      
5 A 3196 3011 20.19      
6 A 3113 2933 17.98      
7 A 3109 2929 3.46      
8 A 1870 1762 213.53      
9 A 1719 1620 40.55      
10 A 1561 1471 13.55      
11 A 1554 1464 3.30      
12 A 1468 1383 424.87      
13 A 1465 1380 3.82      
14 A 1436 1353 7.90      
15 A 1371 1292 34.54      
16 A 1281 1207 6.56      
17 A 1251 1179 9.03      
18 A 1192 1124 6.00      
19 A 1138 1072 57.17      
20 A 1051 990 1.00      
21 A 982 925 78.70      
22 A 929 875 64.87      
23 A 880 829 105.58      
24 A 822 775 15.72      
25 A 741 698 9.75      
26 A 566 534 7.57      
27 A 541 510 0.71      
28 A 423 398 5.92      
29 A 378 356 21.37      
30 A 310 292 15.87      
31 A 290 273 13.43      
32 A 243 229 1.09      
33 A 76 71 1.36      

Unscaled Zero Point Vibrational Energy (zpe) 24388.8 cm-1
Scaled (by 0.9422) Zero Point Vibrational Energy (zpe) 22979.2 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
0.16170 0.11609 0.07196

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 1.056 1.358 -0.056
C2 1.470 -1.135 -0.179
C3 0.644 0.013 0.379
C4 -0.845 -0.170 0.053
O5 -1.509 0.986 -0.124
O6 -1.381 -1.260 -0.003
H7 1.348 1.329 -1.033
H8 1.858 1.682 0.480
H9 1.073 -2.090 0.166
H10 1.432 -1.132 -1.273
H11 0.703 0.005 1.475
H12 2.514 -1.045 0.134
H13 -0.810 1.687 -0.065

Atom - Atom Distances (Å)
  N1 C2 C3 C4 O5 O6 H7 H8 H9 H10 H11 H12 H13
N12.53011.47152.44062.59273.57651.02031.01773.45522.79602.07322.81721.8948
C22.53011.52092.51883.65832.85982.61062.91881.09061.09442.15061.09333.6302
C31.47151.52091.53522.41622.42272.05422.06542.15762.15851.09752.16262.2612
C42.44062.51881.53521.34561.21572.86963.30372.71622.80422.10863.47171.8610
O52.59273.65832.41621.34562.25283.01843.49094.02743.80222.90024.51470.9915
O63.57652.85982.42271.21572.25283.90024.40182.59673.08912.85043.90373.0019
H71.02032.61062.05422.86963.01843.90021.63503.63382.47342.90852.89082.3928
H81.01772.91882.06543.30373.49094.40181.63503.86563.34182.26632.82612.7231
H93.45521.09062.15762.71624.02742.59673.63383.86561.76602.49811.78044.2271
H102.79601.09442.15852.80423.80223.08912.47343.34181.76603.06161.77703.7986
H112.07322.15061.09752.10862.90022.85042.90852.26632.49813.06162.48652.7364
H122.81721.09332.16263.47174.51473.90372.89082.82611.78041.77702.48654.3076
H131.89483.63022.26121.86100.99153.00192.39282.72314.22713.79862.73644.3076

picture of Alanine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C3 C2 115.442 N1 C3 C4 108.515
N1 C3 H11 106.705 C2 C3 C4 111.010
C2 C3 H11 109.374 C3 N1 H7 109.722
C3 N1 H8 110.825 C3 C2 H9 110.330
C3 C2 H10 110.180 C3 C2 H12 110.568
C3 C4 O5 113.849 C3 C4 O6 123.029
C4 C3 H11 105.224 C4 O5 H13 104.535
O5 C4 O6 123.090 H7 N1 H8 106.695
H9 C2 H10 107.848 H9 C2 H12 109.220
H10 C2 H12 108.631
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability