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: HF/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 HF/CEP-31G
 hartrees
Energy at 0K-61.472185
Energy at 298.15K-61.482171
Nuclear repulsion energy137.724153
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 HF/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 3878 3496 9.20      
2 A 3773 3401 382.49      
3 A 3760 3389 90.64      
4 A 3335 3007 27.87      
5 A 3302 2976 58.72      
6 A 3241 2922 24.25      
7 A 3223 2905 85.30      
8 A 1895 1708 404.48      
9 A 1833 1652 86.86      
10 A 1658 1495 3.42      
11 A 1616 1457 16.34      
12 A 1550 1398 18.91      
13 A 1510 1361 28.69      
14 A 1466 1322 393.30      
15 A 1428 1288 6.06      
16 A 1408 1269 1.59      
17 A 1342 1210 85.46      
18 A 1256 1132 13.41      
19 A 1175 1059 22.53      
20 A 1079 972 20.52      
21 A 1042 939 27.98      
22 A 979 883 94.30      
23 A 938 846 185.86      
24 A 915 825 139.80      
25 A 866 781 25.05      
26 A 735 663 15.13      
27 A 598 539 9.04      
28 A 515 465 10.36      
29 A 413 372 17.72      
30 A 342 308 4.26      
31 A 281 254 4.39      
32 A 203 183 7.49      
33 A 81 73 1.27      

Unscaled Zero Point Vibrational Energy (zpe) 25819.7 cm-1
Scaled (by 0.9014) Zero Point Vibrational Energy (zpe) 23273.9 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 HF/CEP-31G
ABC
0.23315 0.08217 0.06503

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 1.952 0.560 0.108
C2 1.358 -0.714 -0.372
C3 0.016 -0.993 0.343
C4 -1.086 0.030 0.035
O5 -0.701 1.333 -0.013
O6 -2.252 -0.289 -0.141
H7 2.624 0.961 -0.521
H8 2.328 0.512 1.039
H9 2.023 -1.564 -0.214
H10 1.197 -0.621 -1.442
H11 -0.368 -1.968 0.066
H12 0.172 -0.997 1.423
H13 0.256 1.462 0.083

Atom - Atom Distances (Å)
  N1 C2 C3 C4 O5 O6 H7 H8 H9 H10 H11 H12 H13
N11.48542.49283.08402.76574.29551.00431.00552.14912.09023.43152.70581.9209
C21.48541.54602.58662.92593.64202.10542.10591.09031.08702.17782.16962.4815
C32.49281.54601.53472.46022.42333.37172.84482.16012.17321.08441.09072.4806
C43.08402.58661.53471.35961.22173.86493.59053.50252.79572.12372.13631.9630
O52.76572.92592.46021.35962.24803.38433.30963.98183.07673.31942.87300.9703
O64.29553.64202.42331.22172.24805.04804.79634.46173.70122.53222.96993.0669
H71.00432.10543.37173.86493.38435.04801.65042.61332.32164.22833.69152.4947
H81.00552.10592.84483.59053.30964.79631.65042.44362.95333.79022.65932.4717
H92.14911.09032.16013.50253.98184.46172.61332.44361.75512.44132.53543.5166
H102.09021.08702.17322.79573.07673.70122.32162.95331.75512.55723.06642.7481
H113.43152.17781.08442.12373.31942.53224.22833.79022.44132.55721.75393.4869
H122.70582.16961.09072.13632.87302.96993.69152.65932.53543.06641.75392.8020
H131.92092.48152.48061.96300.97033.06692.49472.47173.51662.74813.48692.8020

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 110.624 N1 C2 H9 112.187
N1 C2 H10 107.687 C2 N1 H7 114.083
C2 N1 H8 114.049 C2 C3 C4 114.194
C2 C3 H11 110.549 C2 C3 H12 109.532
C3 C2 H9 108.813 C3 C2 H10 110.031
C3 C4 O5 116.289 C3 C4 O6 122.672
C4 C3 H11 107.103 C4 C3 H12 107.720
C4 O5 H13 113.759 O5 C4 O6 121.030
H7 N1 H8 110.409 H9 C2 H10 107.436
H11 C3 H12 107.487
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/CEP-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.744      
2 C -0.139      
3 C -0.081      
4 C 0.067      
5 O -0.476      
6 O -0.229      
7 H 0.309      
8 H 0.291      
9 H 0.140      
10 H 0.129      
11 H 0.161      
12 H 0.105      
13 H 0.465      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  7.671 -1.788 0.777 7.915
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -43.231 2.213 -1.124
y 2.213 -38.366 -0.073
z -1.124 -0.073 -33.720
Traceless
 xyz
x -7.188 2.213 -1.124
y 2.213 0.110 -0.073
z -1.124 -0.073 7.078
Polar
3z2-r214.156
x2-y2-4.865
xy2.213
xz-1.124
yz-0.073


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.334 0.669 0.141
y 0.669 5.760 -0.001
z 0.141 -0.001 4.872


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