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All results from a given calculation for CH3CH(NH2)COOH (Alanine)

using model chemistry: CID/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 CID/3-21G
 hartrees
Energy at 0K-320.617067
Energy at 298.15K-320.626769
Nuclear repulsion energy248.897992
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 CID/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 3642 3393 5.87      
2 A 3543 3301 0.80      
3 A 3457 3221 229.94      
4 A 3240 3018 4.59      
5 A 3205 2985 23.19      
6 A 3158 2942 7.00      
7 A 3140 2925 12.14      
8 A 1905 1775 225.10      
9 A 1792 1669 38.49      
10 A 1622 1511 9.36      
11 A 1616 1505 6.06      
12 A 1523 1419 15.67      
13 A 1465 1365 13.19      
14 A 1457 1357 425.23      
15 A 1402 1306 41.43      
16 A 1302 1213 5.25      
17 A 1265 1178 21.47      
18 A 1210 1127 28.57      
19 A 1122 1045 38.10      
20 A 1082 1008 0.22      
21 A 999 930 86.02      
22 A 927 863 134.73      
23 A 875 815 127.92      
24 A 820 764 10.25      
25 A 752 700 8.65      
26 A 573 534 5.72      
27 A 554 516 0.57      
28 A 420 391 6.16      
29 A 383 357 17.06      
30 A 320 298 13.22      
31 A 293 273 16.00      
32 A 237 221 0.36      
33 A 81 75 1.67      

Unscaled Zero Point Vibrational Energy (zpe) 24689.0 cm-1
Scaled (by 0.9316) Zero Point Vibrational Energy (zpe) 23000.3 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 CID/3-21G
ABC
0.15793 0.11660 0.07159

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 1.050 1.369 -0.062
C2 1.470 -1.153 -0.188
C3 0.652 0.007 0.395
C4 -0.845 -0.179 0.059
O5 -1.498 0.996 -0.128
O6 -1.382 -1.267 -0.001
H7 1.357 1.360 -1.031
H8 1.765 1.786 0.523
H9 1.028 -2.096 0.125
H10 1.448 -1.113 -1.279
H11 0.726 -0.001 1.485
H12 2.507 -1.104 0.147
H13 -0.800 1.705 -0.104

Atom - Atom Distances (Å)
  N1 C2 C3 C4 O5 O6 H7 H8 H9 H10 H11 H12 H13
N12.55961.49012.44922.57513.58691.01711.01413.46992.79252.09112.87801.8805
C22.55961.53512.52443.66472.86112.65363.03821.08771.09182.16331.09013.6514
C31.49011.53511.54522.42282.43272.08892.10252.15382.16581.09242.17692.2892
C42.44922.52441.54521.35641.21562.89973.29982.68152.81442.12923.47851.8916
O52.57513.66472.42281.35642.26983.01633.41964.00033.80072.92234.53000.9953
O63.58692.86112.43271.21562.26983.93354.41632.55173.10892.87333.89513.0311
H71.01712.65362.08892.89973.01633.93351.66253.65972.48752.92972.96402.3732
H81.01413.03822.10253.29983.41964.41631.66253.97163.42822.27993.00772.6420
H93.46991.08772.15382.68154.00032.55173.65973.97161.76432.51611.78074.2245
H102.79251.09182.16582.81443.80073.10892.48753.42821.76433.06521.77603.7915
H112.09112.16331.09242.12922.92232.87332.92972.27992.51613.06522.48572.7868
H122.87801.09012.17693.47854.53003.89512.96403.00771.78071.77602.48574.3466
H131.88053.65142.28921.89160.99533.03112.37322.64204.22453.79152.78684.3466

picture of Alanine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C3 C2 115.568 N1 C3 C4 107.571
N1 C3 H11 107.130 C2 C3 C4 110.075
C2 C3 H11 109.685 C3 N1 H7 111.449
C3 N1 H8 112.807 C3 C2 H9 109.218
C3 C2 H10 109.916 C3 C2 H12 110.899
C3 C4 O5 113.064 C3 C4 O6 123.115
C4 C3 H11 106.381 C4 O5 H13 106.080
O5 C4 O6 123.803 H7 N1 H8 109.861
H9 C2 H10 108.090 H9 C2 H12 109.698
H10 C2 H12 108.970
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability