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All results from a given calculation for NH2CH2CH2COOH (β–alanine)

using model chemistry: MP2/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at MP2/3-21G*
 hartrees
Energy at 0K-320.692638
Energy at 298.15K-320.702615
HF Energy-320.064413
Nuclear repulsion energy244.718187
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 MP2/3-21G*
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 3531 3359 5.14      
2 A 3431 3264 1.75      
3 A 3174 3019 6.26      
4 A 3152 2998 14.93      
5 A 3091 2941 6.23      
6 A 3077 2927 30.68      
7 A 2791 2655 900.68      
8 A 1770 1683 275.53      
9 A 1740 1656 16.95      
10 A 1602 1524 8.23      
11 A 1564 1488 5.11      
12 A 1554 1479 229.43      
13 A 1452 1381 12.34      
14 A 1404 1335 4.02      
15 A 1362 1295 3.60      
16 A 1315 1251 7.32      
17 A 1222 1162 108.89      
18 A 1186 1128 38.67      
19 A 1139 1084 138.48      
20 A 1082 1029 11.51      
21 A 1026 976 13.62      
22 A 976 929 5.50      
23 A 927 882 40.09      
24 A 861 819 44.98      
25 A 791 752 9.34      
26 A 697 663 9.42      
27 A 571 543 3.10      
28 A 493 469 10.89      
29 A 424 404 12.23      
30 A 356 339 6.55      
31 A 328 312 12.71      
32 A 214 204 5.11      
33 A 90 86 0.36      

Unscaled Zero Point Vibrational Energy (zpe) 24196.3 cm-1
Scaled (by 0.9513) Zero Point Vibrational Energy (zpe) 23017.9 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 MP2/3-21G*
ABC
0.23181 0.08328 0.06569

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 1.905 0.569 0.145
C2 1.339 -0.729 -0.393
C3 0.001 -1.024 0.323
C4 -1.085 0.047 0.030
O5 -0.609 1.331 -0.042
O6 -2.284 -0.235 -0.104
H7 2.652 0.934 -0.451
H8 2.256 0.444 1.099
H9 2.033 -1.571 -0.272
H10 1.158 -0.580 -1.461
H11 -0.406 -1.986 0.000
H12 0.170 -1.072 1.407
H13 0.417 1.312 0.078

Atom - Atom Distances (Å)
  N1 C2 C3 C4 O5 O6 H7 H8 H9 H10 H11 H12 H13
N11.51442.48873.03722.63384.27191.02371.02502.18332.11103.44762.70031.6645
C21.51441.54622.58062.85763.66772.12032.10851.09741.09392.18622.17342.2890
C32.48871.54621.55372.46072.45433.38622.80142.18712.17231.09271.09852.3858
C43.03722.58061.55371.37131.23843.87133.53113.52622.76522.14392.17411.9643
O52.63382.85762.46071.37132.29373.31103.20983.93162.96443.32382.91271.0334
O64.27193.66772.45431.23842.29375.08444.74574.52193.71522.56943.00103.1176
H71.02372.12033.38623.87133.31105.08441.67372.58662.35524.25273.69292.3280
H81.02502.10852.80143.53113.20984.74571.67372.44762.96873.76852.59692.2761
H92.18331.09742.18713.52623.93164.52192.58662.44761.77842.48942.55723.3234
H102.11101.09392.17232.76522.96443.71522.35522.96871.77842.56103.07322.5488
H113.44762.18621.09272.14393.32382.56944.25273.76852.48942.56101.77403.4000
H122.70032.17341.09852.17412.91273.00103.69292.59692.55723.07321.77402.7405
H131.66452.28902.38581.96431.03343.11762.32802.27613.32342.54883.40002.7405

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 108.808 N1 C2 H9 112.448
N1 C2 H10 106.951 C2 N1 H7 111.854
C2 N1 H8 110.784 C2 C3 C4 112.706
C2 C3 H11 110.709 C2 C3 H12 109.363
C3 C2 H9 110.501 C3 C2 H10 109.545
C3 C4 O5 114.403 C3 C4 O6 122.646
C4 C3 H11 106.917 C4 C3 H12 108.903
C4 O5 H13 108.729 O5 C4 O6 122.938
H7 N1 H8 109.564 H9 C2 H10 108.497
H11 C3 H12 108.110
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability