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: B1B95/CEP-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 B1B95/CEP-31G*
 hartrees
Energy at 0K-62.958281
Energy at 298.15K-62.967650
Nuclear repulsion energy139.275665
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 B1B95/CEP-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 3650 3494 10.44      
2 A 3550 3398 0.85      
3 A 3444 3296 324.06      
4 A 3186 3050 11.15      
5 A 3157 3022 39.34      
6 A 3102 2969 13.00      
7 A 3077 2946 21.22      
8 A 1883 1802 331.77      
9 A 1675 1604 45.80      
10 A 1491 1427 25.82      
11 A 1481 1418 4.58      
12 A 1448 1386 430.90      
13 A 1401 1341 15.98      
14 A 1377 1318 6.37      
15 A 1306 1250 12.20      
16 A 1246 1192 14.44      
17 A 1213 1161 7.40      
18 A 1160 1111 9.42      
19 A 1098 1051 47.79      
20 A 1005 962 1.92      
21 A 937 897 77.01      
22 A 915 876 51.48      
23 A 887 849 115.64      
24 A 808 773 7.04      
25 A 726 695 7.34      
26 A 560 536 4.70      
27 A 522 500 1.06      
28 A 390 373 5.65      
29 A 349 334 14.00      
30 A 302 289 17.19      
31 A 251 240 12.60      
32 A 220 211 0.20      
33 A 71 68 1.35      

Unscaled Zero Point Vibrational Energy (zpe) 23943.1 cm-1
Scaled (by 0.9572) Zero Point Vibrational Energy (zpe) 22918.3 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 B1B95/CEP-31G*
ABC
0.15969 0.11419 0.07120

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/CEP-31G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 1.099 1.339 -0.020
C2 1.446 -1.182 -0.219
C3 0.651 -0.012 0.383
C4 -0.863 -0.151 0.056
O5 -1.464 1.030 -0.178
O6 -1.451 -1.217 0.046
H7 1.501 1.309 -0.959
H8 1.823 1.690 0.605
H9 0.991 -2.137 0.080
H10 1.431 -1.134 -1.321
H11 0.704 -0.065 1.483
H12 2.494 -1.160 0.120
H13 -0.721 1.686 -0.132

Atom - Atom Distances (Å)
  N1 C2 C3 C4 O5 O6 H7 H8 H9 H10 H11 H12 H13
N12.55221.47942.46492.58633.61131.02141.01873.47872.81402.09442.86491.8560
C22.55221.53682.54393.65522.90952.59873.01081.09911.10322.16681.10173.5951
C31.47941.53681.55582.42402.44672.06572.07782.17282.18401.10262.18652.2429
C42.46492.54391.55581.34521.21782.95793.30192.71692.85042.12143.50621.8514
O52.58633.65522.42401.34522.25843.07843.44244.01483.79042.94254.53290.9920
O63.61132.90952.44671.21782.25844.01304.41362.60943.19052.83513.94632.9985
H71.02142.59872.06572.95793.07844.01301.64143.63452.47082.91282.87092.4004
H81.01873.01082.07783.30193.44244.41361.64143.95083.44062.25842.96702.6482
H93.47871.09912.17282.71694.01482.60943.63453.95081.77732.51911.79354.1933
H102.81401.10322.18402.85043.79043.19052.47083.44061.77733.08781.79103.7409
H112.09442.16681.10262.12142.94252.83512.91282.25842.51913.08782.50222.7752
H122.86491.10172.18653.50624.53293.94632.87092.96701.79351.79102.50224.3004
H131.85603.59512.24291.85140.99202.99852.40042.64824.19333.74092.77524.3004

picture of Alanine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C3 C2 115.585 N1 C3 C4 108.577
N1 C3 H11 107.527 C2 C3 C4 110.688
C2 C3 H11 109.261 C3 N1 H7 110.037
C3 N1 H8 111.218 C3 C2 H9 109.923
C3 C2 H10 110.567 C3 C2 H12 110.857
C3 C4 O5 113.147 C3 C4 O6 123.344
C4 C3 H11 104.591 C4 O5 H13 103.742
O5 C4 O6 123.485 H7 N1 H8 107.142
H9 C2 H10 107.611 H9 C2 H12 109.164
H10 C2 H12 108.642
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/CEP-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.625      
2 C -0.480      
3 C -0.009      
4 C -0.191      
5 O -0.287      
6 O -0.096      
7 H 0.293      
8 H 0.307      
9 H 0.199      
10 H 0.135      
11 H 0.165      
12 H 0.166      
13 H 0.425      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  5.381 2.157 0.357 5.808
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -38.918 -0.000 -0.325
y -0.000 -37.041 0.066
z -0.325 0.066 -33.014
Traceless
 xyz
x -3.890 -0.000 -0.325
y -0.000 -1.075 0.066
z -0.325 0.066 4.965
Polar
3z2-r29.931
x2-y2-1.877
xy-0.000
xz-0.325
yz0.066


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.995 0.226 0.073
y 0.226 7.441 -0.032
z 0.073 -0.032 5.253


<r2> (average value of r2) Å2
<r2> 0.000
(<r2>)1/2 0.000