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 NH2CH2CH2COOH (β–alanine)

using model chemistry: B1B95/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at B1B95/3-21G*
 hartrees
Energy at 0K-321.825393
Energy at 298.15K-321.835399
Nuclear repulsion energy247.737873
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 B1B95/3-21G*
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 3545 3386 9.43      
2 A 3444 3289 3.17      
3 A 3169 3026 3.94      
4 A 3139 2997 12.80      
5 A 3070 2932 8.08      
6 A 3065 2927 30.24      
7 A 2503 2390 1003.50      
8 A 1830 1747 437.64      
9 A 1700 1623 41.12      
10 A 1595 1523 227.41      
11 A 1550 1480 17.86      
12 A 1511 1443 10.72      
13 A 1421 1357 11.63      
14 A 1374 1312 7.30      
15 A 1332 1272 5.92      
16 A 1302 1243 20.75      
17 A 1236 1181 116.13      
18 A 1224 1169 110.86      
19 A 1164 1112 25.53      
20 A 1069 1021 6.39      
21 A 1016 970 22.05      
22 A 960 917 5.89      
23 A 922 881 33.24      
24 A 859 820 52.84      
25 A 800 764 18.11      
26 A 696 664 13.10      
27 A 578 552 4.27      
28 A 490 468 12.58      
29 A 436 416 10.34      
30 A 376 359 13.02      
31 A 341 326 6.61      
32 A 205 195 5.04      
33 A 89 85 0.45      

Unscaled Zero Point Vibrational Energy (zpe) 24006.0 cm-1
Scaled (by 0.9549) Zero Point Vibrational Energy (zpe) 22923.3 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 B1B95/3-21G*
ABC
0.23818 0.08573 0.06761

See section I.F.4 to change rotational constant units
Geometric Data calculated at B1B95/3-21G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 1.865 0.559 0.168
C2 1.326 -0.720 -0.391
C3 -0.010 -1.028 0.293
C4 -1.073 0.055 0.024
O5 -0.573 1.303 -0.067
O6 -2.263 -0.208 -0.074
H7 2.614 0.956 -0.401
H8 2.179 0.447 1.136
H9 2.026 -1.554 -0.273
H10 1.159 -0.555 -1.459
H11 -0.417 -1.977 -0.055
H12 0.144 -1.107 1.378
H13 0.472 1.266 0.070

Atom - Atom Distances (Å)
  N1 C2 C3 C4 O5 O6 H7 H8 H9 H10 H11 H12 H13
N11.49662.45932.98372.56014.20501.02161.02312.16432.09453.41902.68341.5648
C21.49661.53222.55442.79373.63862.11422.10261.09551.09272.17502.16272.2100
C32.45931.53221.54092.42502.42553.36222.77042.17802.15891.09031.09802.3540
C42.98372.55441.54091.34721.22283.81883.45853.50432.74852.13712.15901.9628
O52.56012.79372.42501.34722.26623.22353.12343.86822.89723.28432.90011.0551
O64.20503.63862.42551.22282.26625.02424.64984.49973.70802.55722.95083.1096
H71.02162.11423.36223.81883.22355.02421.67662.58112.34924.23233.67772.2150
H81.02312.10262.77043.45853.12344.64981.67662.45122.96223.74612.57212.1722
H92.16431.09552.17803.50433.86824.49972.58112.45121.77622.48932.54343.2376
H102.09451.09272.15892.74852.89723.70802.34922.96221.77622.54513.06312.4753
H113.41902.17501.09032.13713.28432.55724.23233.74612.48932.54511.76773.3649
H122.68342.16271.09802.15902.90012.95083.67772.57212.54343.06311.76772.7286
H131.56482.21002.35401.96281.05513.10962.21502.17223.23762.47533.36492.7286

picture of β–alanine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C2 C3 108.574 N1 C2 H9 112.298
N1 C2 H10 106.944 C2 N1 H7 112.828
C2 N1 H8 111.745 C2 C3 C4 112.448
C2 C3 H11 110.946 C2 C3 H12 109.515
C3 C2 H9 110.871 C3 C2 H10 109.530
C3 C4 O5 114.042 C3 C4 O6 122.295
C4 C3 H11 107.386 C4 C3 H12 108.640
C4 O5 H13 108.977 O5 C4 O6 123.653
H7 N1 H8 110.162 H9 C2 H10 108.524
H11 C3 H12 107.759
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B1B95/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.723      
2 C -0.305      
3 C -0.549      
4 C 0.665      
5 O -0.609      
6 O -0.496      
7 H 0.321      
8 H 0.315      
9 H 0.226      
10 H 0.255      
11 H 0.256      
12 H 0.240      
13 H 0.405      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  7.260 -1.582 0.631 7.457
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -37.444 2.634 -0.160
y 2.634 -37.180 0.295
z -0.160 0.295 -32.858
Traceless
 xyz
x -2.425 2.634 -0.160
y 2.634 -2.029 0.295
z -0.160 0.295 4.454
Polar
3z2-r28.909
x2-y2-0.264
xy2.634
xz-0.160
yz0.295


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.312 0.574 0.121
y 0.574 5.661 -0.061
z 0.121 -0.061 4.554


<r2> (average value of r2) Å2
<r2> 168.637
(<r2>)1/2 12.986