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

using model chemistry: HF/6-31G

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/6-31G
 hartrees
Energy at 0K-321.715085
Energy at 298.15K-321.724766
Nuclear repulsion energy250.282807
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/6-31G
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 3902 3523 184.40      
2 A 3897 3519 28.13      
3 A 3780 3413 11.96      
4 A 3315 2993 7.50      
5 A 3270 2952 36.10      
6 A 3218 2905 10.67      
7 A 3199 2889 21.33      
8 A 1946 1757 303.02      
9 A 1848 1668 63.50      
10 A 1656 1495 9.52      
11 A 1649 1489 4.28      
12 A 1581 1427 10.38      
13 A 1535 1386 15.67      
14 A 1472 1329 187.98      
15 A 1436 1297 328.25      
16 A 1360 1228 18.77      
17 A 1323 1194 12.45      
18 A 1267 1144 24.57      
19 A 1167 1054 42.35      
20 A 1118 1009 1.63      
21 A 1022 923 31.44      
22 A 871 787 21.28      
23 A 849 767 217.08      
24 A 814 735 224.93      
25 A 784 708 43.00      
26 A 596 538 10.33      
27 A 580 524 4.24      
28 A 442 399 3.12      
29 A 380 343 7.71      
30 A 302 273 18.84      
31 A 287 259 8.42      
32 A 252 228 0.32      
33 A 43 39 0.79      

Unscaled Zero Point Vibrational Energy (zpe) 25580.2 cm-1
Scaled (by 0.9029) Zero Point Vibrational Energy (zpe) 23096.4 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/6-31G
ABC
0.16260 0.11473 0.07220

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/6-31G

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 1.109 1.320 0.003
C2 1.450 -1.152 -0.244
C3 0.645 -0.011 0.382
C4 -0.843 -0.156 0.060
O5 -1.488 0.988 -0.206
O6 -1.411 -1.222 0.077
H7 1.517 1.390 -0.905
H8 1.634 1.813 0.690
H9 1.037 -2.109 0.039
H10 1.429 -1.086 -1.326
H11 0.712 -0.089 1.462
H12 2.481 -1.100 0.083
H13 -0.892 1.738 -0.218

Atom - Atom Distances (Å)
  N1 C2 C3 C4 O5 O6 H7 H8 H9 H10 H11 H12 H13
N12.50751.46012.44742.62583.58020.99760.99523.42962.76762.06702.78352.0553
C22.50751.52992.51783.63452.87992.62703.11321.07971.08472.14091.08293.7196
C31.46011.52991.52852.42702.40522.09282.09772.16102.16541.08492.15582.4041
C42.44742.51781.52851.33991.20832.98143.22582.71042.81912.09433.45521.9151
O52.62583.63452.42701.33992.22943.11113.35084.00293.75032.96304.49380.9584
O63.58022.87992.40521.20832.22944.04484.34262.60423.17082.77653.89413.0200
H70.99762.62702.09282.98143.11114.04481.65363.65512.51322.90462.84702.5289
H80.99523.11322.09773.22583.35084.34261.65364.01933.53682.25023.09342.6847
H93.42961.07972.16102.71044.00292.60423.65514.01931.75012.49181.76164.3109
H102.76761.08472.16542.81913.75033.17082.51323.53681.75013.04681.75883.8199
H112.06702.14091.08492.09432.96302.77652.90462.25022.49183.04682.46042.9547
H122.78351.08292.15583.45524.49383.89412.84703.09341.76161.75882.46044.4183
H132.05533.71962.40411.91510.95843.02002.52892.68474.31093.81992.95474.4183

picture of Alanine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C3 C2 113.968 N1 C3 C4 109.932
N1 C3 H11 107.705 C2 C3 C4 110.823
C2 C3 H11 108.727 C3 N1 H7 115.470
C3 N1 H8 116.092 C3 C2 H9 110.623
C3 C2 H10 110.667 C3 C2 H12 110.016
C3 C4 O5 115.426 C3 C4 O6 122.574
C4 C3 H11 105.260 C4 O5 H13 111.800
O5 C4 O6 121.972 H7 N1 H8 112.153
H9 C2 H10 107.913 H9 C2 H12 109.090
H10 C2 H12 108.470
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/6-31G Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.901      
2 C -0.447      
3 C -0.107      
4 C 0.810      
5 O -0.736      
6 O -0.551      
7 H 0.349      
8 H 0.352      
9 H 0.212      
10 H 0.163      
11 H 0.225      
12 H 0.162      
13 H 0.467      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  5.855 2.733 0.520 6.482
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -42.162 -0.895 -0.443
y -0.895 -37.201 0.392
z -0.443 0.392 -33.527
Traceless
 xyz
x -6.799 -0.895 -0.443
y -0.895 0.644 0.392
z -0.443 0.392 6.155
Polar
3z2-r212.310
x2-y2-4.962
xy-0.895
xz-0.443
yz0.392


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 5.694 0.490 0.045
y 0.490 6.696 -0.110
z 0.045 -0.110 4.646


<r2> (average value of r2) Å2
<r2> 163.523
(<r2>)1/2 12.788