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

using model chemistry: MP2/6-31G(2df,p)

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at MP2/6-31G(2df,p)
 hartrees
Energy at 0K-323.019513
Energy at 298.15K-323.029394
HF Energy-321.902196
Nuclear repulsion energy248.114377
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 MP2/6-31G(2df,p)
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
(Å4/u)
Dep P Dep U
1 A 3656 3453 14.02      
2 A 3558 3360 3.35      
3 A 3319 3135 734.20      
4 A 3196 3019 3.30      
5 A 3164 2989 12.31      
6 A 3104 2932 3.67      
7 A 3090 2918 42.26      
8 A 1858 1755 307.50      
9 A 1666 1573 29.91      
10 A 1540 1455 8.53      
11 A 1510 1426 238.33      
12 A 1485 1403 8.48      
13 A 1432 1352 9.74      
14 A 1384 1307 8.02      
15 A 1331 1257 6.72      
16 A 1307 1235 18.58      
17 A 1269 1198 59.85      
18 A 1158 1094 7.36      
19 A 1110 1048 4.33      
20 A 1041 983 8.76      
21 A 998 943 62.46      
22 A 969 915 40.27      
23 A 930 879 17.36      
24 A 882 833 46.09      
25 A 825 779 17.37      
26 A 704 665 8.27      
27 A 584 551 2.72      
28 A 491 464 8.92      
29 A 405 382 13.46      
30 A 330 311 7.97      
31 A 283 268 9.57      
32 A 206 195 4.54      
33 A 89 84 0.31      

Unscaled Zero Point Vibrational Energy (zpe) 24435.7 cm-1
Scaled (by 0.9445) Zero Point Vibrational Energy (zpe) 23079.5 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 MP2/6-31G(2df,p)
ABC
0.24148 0.08420 0.06688

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G(2df,p)

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 1.904 0.567 0.138
C2 1.345 -0.691 -0.383
C3 0.019 -0.982 0.316
C4 -1.080 0.038 0.030
O5 -0.674 1.312 -0.042
O6 -2.237 -0.276 -0.105
H7 2.685 0.877 -0.429
H8 2.262 0.424 1.076
H9 2.022 -1.543 -0.262
H10 1.174 -0.557 -1.454
H11 -0.368 -1.959 0.026
H12 0.179 -1.008 1.400
H13 0.308 1.323 0.074

Atom - Atom Distances (Å)
  N1 C2 C3 C4 O5 O6 H7 H8 H9 H10 H11 H12 H13
N11.47212.44693.03232.68884.23331.01341.01462.15112.08133.39962.65451.7666
C21.47211.52742.56532.86373.61692.06262.05261.09511.09242.17042.15352.3109
C32.44691.52741.52622.42312.40113.33462.75452.15932.15621.08961.09592.3365
C43.03232.56531.52621.33941.20693.88423.52303.49372.76382.11972.13431.8927
O52.68882.86372.42311.33942.22983.40843.26463.93252.98383.28582.86140.9889
O64.23333.61692.40111.20692.22985.06584.70414.44673.67982.51852.93933.0120
H71.01342.06263.33463.88423.40845.06581.62782.51412.32144.19153.62922.4697
H81.01462.05262.75453.52303.26464.70411.62782.39092.92373.70092.54752.3728
H92.15111.09512.15933.49373.93254.44672.51412.39091.76332.44342.53863.3564
H102.08131.09242.15622.76382.98383.67982.32142.92371.76332.55643.05562.5735
H113.39962.17041.08962.11973.28582.51854.19153.70092.44342.55641.75813.3517
H122.65452.15351.09592.13432.86142.93933.62922.54752.53863.05561.75812.6848
H131.76662.31092.33651.89270.98893.01202.46972.37283.35642.57353.35172.6848

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 109.320 N1 C2 H9 113.021
N1 C2 H10 107.583 C2 N1 H7 110.820
C2 N1 H8 109.897 C2 C3 C4 114.303
C2 C3 H11 110.962 C2 C3 H12 109.250
C3 C2 H9 109.750 C3 C2 H10 109.668
C3 C4 O5 115.315 C3 C4 O6 122.507
C4 C3 H11 107.079 C4 C3 H12 107.844
C4 O5 H13 107.815 O5 C4 O6 122.171
H7 N1 H8 106.777 H9 C2 H10 107.425
H11 C3 H12 107.115
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability