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All results from a given calculation for CH3CH(NH2)COOH (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-320.729110
Energy at 298.15K-320.738658
Nuclear repulsion energy246.631462
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 3485 3378 1.36      
2 A 3387 3283 0.20      
3 A 3218 3119 227.98      
4 A 3129 3033 4.91      
5 A 3096 3000 24.65      
6 A 3051 2957 7.43      
7 A 3032 2938 12.25      
8 A 1795 1739 186.90      
9 A 1739 1685 29.78      
10 A 1576 1528 7.50      
11 A 1570 1521 6.48      
12 A 1471 1426 13.81      
13 A 1436 1391 345.43      
14 A 1413 1370 40.73      
15 A 1358 1316 14.46      
16 A 1261 1222 2.86      
17 A 1209 1171 15.76      
18 A 1155 1120 32.29      
19 A 1077 1044 34.71      
20 A 1048 1016 0.56      
21 A 983 952 102.32      
22 A 934 905 125.05      
23 A 846 820 76.87      
24 A 777 753 6.97      
25 A 713 691 6.48      
26 A 552 535 4.07      
27 A 529 513 0.24      
28 A 408 396 8.61      
29 A 374 363 19.09      
30 A 317 307 14.03      
31 A 280 272 13.72      
32 A 228 221 0.38      
33 A 83 80 1.87      

Unscaled Zero Point Vibrational Energy (zpe) 23763.7 cm-1
Scaled (by 0.9692) Zero Point Vibrational Energy (zpe) 23031.8 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
0.15459 0.11497 0.07040

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 1.057 1.379 -0.062
C2 1.475 -1.169 -0.192
C3 0.659 0.000 0.402
C4 -0.853 -0.177 0.061
O5 -1.498 1.021 -0.131
O6 -1.406 -1.276 -0.001
H7 1.372 1.350 -1.040
H8 1.800 1.778 0.520
H9 1.011 -2.115 0.110
H10 1.457 -1.115 -1.291
H11 0.740 -0.006 1.500
H12 2.518 -1.139 0.152
H13 -0.757 1.711 -0.100

Atom - Atom Distances (Å)
  N1 C2 C3 C4 O5 O6 H7 H8 H9 H10 H11 H12 H13
N12.58501.50772.46622.58033.62161.02801.02483.49832.80852.11082.91841.8447
C22.58501.54442.54283.69292.88932.66003.04961.09631.10052.18111.09853.6450
C31.50771.54441.56012.44522.46092.09982.11612.16422.17861.10082.19402.2773
C42.46622.54281.56011.37441.23172.91453.32772.68892.83622.15303.50611.8975
O52.58033.69292.44521.37442.30273.02823.44574.02333.82642.95284.56831.0124
O63.62162.88932.46091.23172.30273.96154.45872.56063.14502.91013.92913.0582
H71.02802.66002.09982.91453.02823.96151.67273.66892.47902.94762.98802.3551
H81.02483.04962.11613.32773.44574.45871.67273.99403.43002.29563.02662.6324
H93.49831.09632.16422.68894.02332.56063.66893.99401.77862.54091.79634.2201
H102.80851.10052.17862.83623.82643.14502.47903.43001.77863.08781.79083.7825
H112.11082.18111.10082.15302.95282.91012.94762.29562.54093.08782.50252.7836
H122.91841.09852.19403.50614.56833.92912.98803.02661.79631.79082.50254.3486
H131.84473.64502.27731.89751.01243.05822.35512.63244.22013.78252.78364.3486

picture of Alanine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C3 C2 115.758 N1 C3 C4 106.992
N1 C3 H11 107.001 C2 C3 C4 109.980
C2 C3 H11 109.946 C3 N1 H7 110.376
C3 N1 H8 111.939 C3 C2 H9 108.891
C3 C2 H10 109.775 C3 C2 H12 111.101
C3 C4 O5 112.715 C3 C4 O6 123.209
C4 C3 H11 106.741 C4 O5 H13 104.283
O5 C4 O6 124.060 H7 N1 H8 109.140
H9 C2 H10 108.115 H9 C2 H12 109.850
H10 C2 H12 109.056
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability