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: CISD/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 CISD/6-311G**
 hartrees
Energy at 0K-322.811102
Energy at 298.15K-322.820850
Nuclear repulsion energy251.935226
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/6-311G**
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 3872 3872 227.72      
2 A 3767 3767 11.36      
3 A 3677 3677 5.90      
4 A 3266 3266 9.37      
5 A 3226 3226 31.89      
6 A 3171 3171 12.36      
7 A 3154 3154 16.03      
8 A 1984 1984 328.59      
9 A 1736 1736 39.52      
10 A 1574 1574 21.48      
11 A 1565 1565 2.43      
12 A 1514 1514 404.78      
13 A 1495 1495 3.33      
14 A 1472 1472 42.50      
15 A 1403 1403 34.76      
16 A 1313 1313 7.89      
17 A 1288 1288 11.32      
18 A 1227 1227 9.24      
19 A 1164 1164 55.83      
20 A 1072 1072 0.46      
21 A 995 995 35.80      
22 A 946 946 99.30      
23 A 865 865 6.06      
24 A 831 831 106.68      
25 A 785 785 16.92      
26 A 588 588 10.10      
27 A 563 563 1.43      
28 A 428 428 6.28      
29 A 377 377 12.34      
30 A 307 307 13.55      
31 A 295 295 14.75      
32 A 251 251 1.16      
33 A 72 72 1.24      

Unscaled Zero Point Vibrational Energy (zpe) 25120.9 cm-1
Scaled (by 1) Zero Point Vibrational Energy (zpe) 25120.9 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 CISD/6-311G**
ABC
0.16523 0.11661 0.07272

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 1.052 1.357 -0.063
C2 1.477 -1.121 -0.171
C3 0.637 0.025 0.370
C4 -0.846 -0.176 0.049
O5 -1.523 0.952 -0.118
O6 -1.354 -1.249 -0.005
H7 1.372 1.336 -1.016
H8 1.809 1.703 0.498
H9 1.102 -2.071 0.190
H10 1.439 -1.138 -1.258
H11 0.681 0.017 1.459
H12 2.513 -1.005 0.137
H13 -0.876 1.660 -0.078

Atom - Atom Distances (Å)
  N1 C2 C3 C4 O5 O6 H7 H8 H9 H10 H11 H12 H13
N12.51691.46072.44272.60743.54721.00621.00343.43812.79442.06162.78471.9521
C22.51691.52072.51833.64712.83872.60062.92101.08351.08822.14111.08693.6445
C31.46071.52071.53122.40072.39342.04482.05012.15482.15631.08942.15282.2725
C42.44272.51831.53121.32551.18822.88853.28332.72172.80372.08723.46151.8404
O52.60743.64712.40071.32552.20993.05573.47044.01523.80052.86684.49270.9598
O63.54722.83872.39341.18822.20993.89024.35512.59683.06292.80803.87722.9486
H71.00622.60062.04482.88853.05573.89021.61853.62462.48732.88882.84812.4579
H81.00342.92102.05013.28333.47044.35511.61853.85203.36102.24452.82112.7465
H93.43811.08352.15482.72174.01522.59683.62463.85201.75542.47891.76984.2315
H102.79441.08822.15632.80373.80053.06292.48733.36101.75543.04821.76593.8191
H112.06162.14111.08942.08722.86682.80802.88882.24452.47893.04822.47942.7365
H122.78471.08692.15283.46154.49273.87722.84812.82111.76981.76592.47944.3170
H131.95213.64452.27251.84040.95982.94862.45792.74654.23153.81912.73654.3170

picture of Alanine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C3 C2 115.152 N1 C3 C4 109.435
N1 C3 H11 106.983 C2 C3 C4 111.206
C2 C3 H11 109.107 C3 N1 H7 110.613
C3 N1 H8 111.251 C3 C2 H9 110.543
C3 C2 H10 110.385 C3 C2 H12 110.187
C3 C4 O5 114.165 C3 C4 O6 122.814
C4 C3 H11 104.314 C4 O5 H13 106.170
O5 C4 O6 122.986 H7 N1 H8 107.297
H9 C2 H10 107.853 H9 C2 H12 109.254
H10 C2 H12 108.559
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability