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

using model chemistry: CISD/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at CISD/3-21G*
 hartrees
Energy at 0K-320.621312
Energy at 298.15K-320.630992
Nuclear repulsion energy248.778159
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 CISD/3-21G*
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 3636 3397 5.89      
2 A 3538 3306 0.94      
3 A 3436 3211 234.05      
4 A 3236 3024 4.57      
5 A 3201 2991 23.56      
6 A 3155 2948 6.81      
7 A 3137 2931 12.49      
8 A 1895 1771 225.93      
9 A 1789 1672 38.42      
10 A 1621 1514 9.09      
11 A 1615 1509 6.20      
12 A 1521 1422 15.36      
13 A 1463 1367 27.46      
14 A 1456 1360 409.67      
15 A 1400 1308 39.15      
16 A 1301 1215 5.03      
17 A 1261 1179 21.02      
18 A 1207 1128 29.39      
19 A 1119 1046 37.51      
20 A 1081 1010 0.25      
21 A 998 933 87.60      
22 A 931 870 136.03      
23 A 874 817 123.17      
24 A 818 764 9.49      
25 A 750 700 8.51      
26 A 572 535 5.55      
27 A 552 516 0.55      
28 A 419 392 6.29      
29 A 382 357 17.13      
30 A 320 299 13.31      
31 A 292 273 15.92      
32 A 237 222 0.36      
33 A 81 76 1.68      

Unscaled Zero Point Vibrational Energy (zpe) 24646.5 cm-1
Scaled (by 0.9344) Zero Point Vibrational Energy (zpe) 23029.7 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 CISD/3-21G*
ABC
0.15769 0.11654 0.07154

See section I.F.4 to change rotational constant units
Geometric Data calculated at CISD/3-21G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 1.054 1.366 -0.059
C2 1.467 -1.157 -0.191
C3 0.652 0.004 0.396
C4 -0.846 -0.176 0.060
O5 -1.493 1.002 -0.131
O6 -1.388 -1.265 0.002
H7 1.365 1.358 -1.028
H8 1.768 1.783 0.528
H9 1.020 -2.099 0.119
H10 1.445 -1.114 -1.282
H11 0.727 -0.006 1.486
H12 2.503 -1.114 0.145
H13 -0.790 1.707 -0.107

Atom - Atom Distances (Å)
  N1 C2 C3 C4 O5 O6 H7 H8 H9 H10 H11 H12 H13
N12.56081.49112.45042.57363.59001.01751.01453.47072.79262.09232.88061.8749
C22.56081.53552.52513.66402.86362.65313.04171.08791.09202.16401.09023.6474
C31.49111.53551.54632.42342.43472.08992.10372.15382.16631.09242.17762.2869
C42.45042.52511.54631.35731.21702.90283.30062.68042.81552.13033.47961.8917
O52.57363.66402.42341.35732.27253.01613.41763.99923.79852.92554.53030.9966
O63.59002.86362.43471.21702.27253.93934.41882.55133.11392.87373.89703.0334
H71.01752.65312.08992.90283.01613.93931.66303.65912.48612.93022.96402.3688
H81.01453.04172.10373.30063.41764.41881.66303.97493.43082.28053.01352.6364
H93.47071.08792.15382.68043.99922.55133.65913.97491.76452.51721.78114.2208
H102.79261.09202.16632.81553.79853.11392.48613.43081.76453.06591.77633.7855
H112.09232.16401.09242.13032.92552.87372.93022.28052.51723.06592.48622.7876
H122.88061.09022.17763.47964.53033.89702.96403.01351.78111.77632.48624.3436
H131.87493.64742.28691.89170.99663.03342.36882.63644.22083.78552.78764.3436

picture of Alanine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C3 C2 115.566 N1 C3 C4 107.543
N1 C3 H11 107.150 C2 C3 C4 110.042
C2 C3 H11 109.712 C3 N1 H7 111.435
C3 N1 H8 112.813 C3 C2 H9 109.177
C3 C2 H10 109.919 C3 C2 H12 110.924
C3 C4 O5 112.999 C3 C4 O6 123.110
C4 C3 H11 106.400 C4 O5 H13 105.946
O5 C4 O6 123.874 H7 N1 H8 109.849
H9 C2 H10 108.087 H9 C2 H12 109.713
H10 C2 H12 108.973
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability