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

using model chemistry: QCISD/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 QCISD/3-21G
 hartrees
Energy at 0K-320.729392
Energy at 298.15K-320.739314
HF Energy-320.064755
Nuclear repulsion energy244.300115
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 QCISD/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 3476 3369 1.73      
2 A 3384 3280 0.45      
3 A 3119 3023 6.63      
4 A 3088 2993 17.15      
5 A 3035 2942 6.67      
6 A 3021 2928 24.07      
7 A 2937 2847 791.50      
8 A 1800 1745 271.57      
9 A 1731 1678 25.08      
10 A 1580 1531 12.65      
11 A 1545 1497 188.88      
12 A 1543 1495 37.48      
13 A 1437 1393 10.38      
14 A 1390 1347 3.62      
15 A 1350 1308 3.65      
16 A 1307 1266 8.25      
17 A 1215 1178 103.71      
18 A 1175 1139 32.54      
19 A 1099 1065 145.87      
20 A 1073 1040 10.32      
21 A 1015 984 17.08      
22 A 967 937 4.61      
23 A 917 889 41.05      
24 A 851 824 40.74      
25 A 785 761 8.33      
26 A 691 670 10.14      
27 A 566 548 3.09      
28 A 486 472 11.04      
29 A 416 403 13.30      
30 A 349 338 5.76      
31 A 320 310 11.10      
32 A 210 203 4.98      
33 A 88 85 0.25      

Unscaled Zero Point Vibrational Energy (zpe) 23980.8 cm-1
Scaled (by 0.9692) Zero Point Vibrational Energy (zpe) 23242.1 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 QCISD/3-21G
ABC
0.23077 0.08290 0.06542

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 1.913 0.571 0.144
C2 1.343 -0.727 -0.396
C3 0.002 -1.024 0.327
C4 -1.089 0.044 0.030
O5 -0.624 1.334 -0.041
O6 -2.280 -0.242 -0.107
H7 2.664 0.933 -0.455
H8 2.274 0.439 1.097
H9 2.038 -1.574 -0.278
H10 1.158 -0.576 -1.467
H11 -0.403 -1.992 0.010
H12 0.175 -1.062 1.415
H13 0.393 1.332 0.080

Atom - Atom Distances (Å)
  N1 C2 C3 C4 O5 O6 H7 H8 H9 H10 H11 H12 H13
N11.51742.49583.05042.65624.27861.02621.02772.18982.11763.45712.70281.7013
C21.51741.55172.58682.87163.66662.12192.11101.10131.09812.19382.18072.3171
C32.49581.55171.55542.46742.45073.39442.81002.19332.18071.09611.10242.4005
C43.05042.58681.55541.37331.23233.88693.55083.53382.77062.14862.17721.9639
O52.65622.87162.46741.37332.28733.33813.24023.94952.97683.33392.91591.0242
O64.27863.66662.45071.23232.28735.09314.75974.52113.71232.56843.00223.1074
H71.02622.12193.39443.88693.33815.09311.67492.58972.35974.26303.69752.3669
H81.02772.11102.81003.55083.24024.75971.67492.44942.97573.77602.60072.3179
H92.18981.10132.19333.53383.94954.52112.58972.44941.78442.49262.56833.3580
H102.11761.09812.18072.77062.97683.71232.35972.97571.78442.57393.08402.5729
H113.45712.19381.09612.14863.33392.56844.26303.77602.49262.57391.78043.4183
H122.70282.18071.10242.17722.91593.00223.69752.60072.56833.08401.78042.7500
H131.70132.31712.40051.96391.02423.10742.36692.31793.35802.57293.41832.7500

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 108.814 N1 C2 H9 112.516
N1 C2 H10 107.035 C2 N1 H7 111.609
C2 N1 H8 110.613 C2 C3 C4 112.722
C2 C3 H11 110.722 C2 C3 H12 109.326
C3 C2 H9 110.367 C3 C2 H10 109.575
C3 C4 O5 114.666 C3 C4 O6 122.646
C4 C3 H11 106.977 C4 C3 H12 108.806
C4 O5 H13 109.136 O5 C4 O6 122.676
H7 N1 H8 109.268 H9 C2 H10 108.451
H11 C3 H12 108.156
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability