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

using model chemistry: HF/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 HF/3-21G
 hartrees
Energy at 0K-320.070274
Energy at 298.15K-320.080071
Nuclear repulsion energy250.644998
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 HF/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 3770 3414 11.80      
2 A 3714 3363 220.50      
3 A 3670 3323 13.44      
4 A 3307 2995 5.19      
5 A 3267 2959 27.87      
6 A 3231 2926 7.40      
7 A 3208 2905 15.88      
8 A 1992 1804 282.21      
9 A 1844 1670 46.44      
10 A 1668 1510 9.11      
11 A 1663 1506 6.13      
12 A 1578 1429 14.94      
13 A 1517 1374 9.08      
14 A 1474 1335 368.03      
15 A 1440 1304 180.47      
16 A 1341 1215 7.62      
17 A 1311 1187 11.72      
18 A 1256 1138 32.50      
19 A 1150 1041 34.46      
20 A 1112 1007 0.76      
21 A 1012 917 64.28      
22 A 907 822 155.35      
23 A 864 782 207.22      
24 A 856 775 4.37      
25 A 782 708 15.76      
26 A 591 535 8.00      
27 A 573 519 1.88      
28 A 430 389 4.32      
29 A 388 352 13.06      
30 A 317 287 12.45      
31 A 304 275 18.41      
32 A 247 224 0.47      
33 A 76 69 1.42      

Unscaled Zero Point Vibrational Energy (zpe) 25428.1 cm-1
Scaled (by 0.9056) Zero Point Vibrational Energy (zpe) 23027.7 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 HF/3-21G
ABC
0.16068 0.11760 0.07246

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 1.045 1.363 -0.060
C2 1.471 -1.138 -0.188
C3 0.645 0.014 0.391
C4 -0.839 -0.181 0.058
O5 -1.502 0.969 -0.130
O6 -1.361 -1.261 0.002
H7 1.350 1.381 -1.019
H8 1.719 1.809 0.535
H9 1.055 -2.081 0.136
H10 1.443 -1.113 -1.272
H11 0.715 0.002 1.473
H12 2.502 -1.070 0.136
H13 -0.863 1.707 -0.115

Atom - Atom Distances (Å)
  N1 C2 C3 C4 O5 O6 H7 H8 H9 H10 H11 H12 H13
N12.54031.47712.43852.57803.56041.00661.00393.44972.78512.07622.84251.9401
C22.54031.53122.51263.64422.84092.65593.04491.08031.08462.15131.08313.6816
C31.47711.53121.53342.40642.40852.08632.09642.15032.16101.08452.16532.3235
C42.43852.51261.53341.34011.20102.89693.27552.68412.80072.10963.45841.8964
O52.57803.64422.40641.34012.23833.01563.39403.98873.78282.90124.50090.9764
O63.56042.84092.40851.20102.23833.92094.38102.55463.08302.84023.87013.0123
H71.00662.65592.08632.89693.01563.92091.65413.66192.50882.91802.94452.4134
H81.00393.04492.09643.27553.39404.38101.65413.96683.44692.26963.01022.6646
H93.44971.08032.15032.68413.98872.55463.66193.96681.75162.49851.76584.2541
H102.78511.08462.16102.80073.78283.08302.50883.44691.75163.05021.76263.8228
H112.07622.15131.08452.10962.90122.84022.91802.26962.49853.05022.47542.8144
H122.84251.08312.16533.45844.50093.87012.94453.01021.76581.76262.47544.3709
H131.94013.68162.32351.89640.97643.01232.41342.66464.25413.82282.81444.3709

picture of Alanine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C3 C2 115.213 N1 C3 C4 108.177
N1 C3 H11 107.299 C2 C3 C4 110.146
C2 C3 H11 109.476 C3 N1 H7 112.916
C3 N1 H8 113.985 C3 C2 H9 109.645
C3 C2 H10 110.240 C3 C2 H12 110.665
C3 C4 O5 113.571 C3 C4 O6 123.022
C4 C3 H11 106.110 C4 O5 H13 108.881
O5 C4 O6 123.386 H7 N1 H8 110.725
H9 C2 H10 108.019 H9 C2 H12 109.415
H10 C2 H12 108.806
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/3-21G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.824      
2 C -0.578      
3 C -0.230      
4 C 0.939      
5 O -0.737      
6 O -0.606      
7 H 0.323      
8 H 0.327      
9 H 0.252      
10 H 0.211      
11 H 0.277      
12 H 0.205      
13 H 0.441      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  5.511 2.484 0.478 6.064
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -40.690 -0.263 -0.573
y -0.263 -37.417 -0.187
z -0.573 -0.187 -33.163
Traceless
 xyz
x -5.400 -0.263 -0.573
y -0.263 -0.490 -0.187
z -0.573 -0.187 5.890
Polar
3z2-r211.781
x2-y2-3.273
xy-0.263
xz-0.573
yz-0.187


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.329 0.471 0.112
y 0.471 6.300 -0.027
z 0.112 -0.027 4.346


<r2> (average value of r2) Å2
<r2> 161.961
(<r2>)1/2 12.726