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

using model chemistry: B3PW91/6-31G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at B3PW91/6-31G*
 hartrees
Energy at 0K-323.621002
Energy at 298.15K-323.630520
Nuclear repulsion energy250.114917
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 B3PW91/6-31G*
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 3606 3449 6.64      
2 A 3510 3358 0.57      
3 A 3375 3229 282.52      
4 A 3172 3035 5.88      
5 A 3135 2999 26.68      
6 A 3066 2934 21.18      
7 A 3061 2929 7.61      
8 A 1891 1809 280.56      
9 A 1696 1623 38.36      
10 A 1523 1457 16.32      
11 A 1514 1449 3.92      
12 A 1474 1410 436.81      
13 A 1427 1365 11.09      
14 A 1406 1345 4.55      
15 A 1332 1274 9.66      
16 A 1259 1205 13.28      
17 A 1234 1181 8.62      
18 A 1166 1115 9.09      
19 A 1111 1063 47.17      
20 A 1028 984 1.42      
21 A 955 913 66.83      
22 A 920 880 62.28      
23 A 886 847 108.85      
24 A 812 777 7.88      
25 A 739 707 8.20      
26 A 568 544 4.74      
27 A 533 510 0.93      
28 A 410 393 5.57      
29 A 369 353 17.87      
30 A 312 298 17.17      
31 A 274 263 13.13      
32 A 225 216 0.29      
33 A 77 74 1.27      

Unscaled Zero Point Vibrational Energy (zpe) 24033.6 cm-1
Scaled (by 0.9567) Zero Point Vibrational Energy (zpe) 22993.0 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 B3PW91/6-31G*
ABC
0.16186 0.11572 0.07202

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-31G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 1.071 1.345 -0.028
C2 1.459 -1.156 -0.204
C3 0.645 -0.004 0.375
C4 -0.857 -0.161 0.053
O5 -1.476 1.004 -0.159
O6 -1.419 -1.230 0.031
H7 1.424 1.334 -0.983
H8 1.821 1.691 0.562
H9 1.025 -2.112 0.099
H10 1.453 -1.122 -1.301
H11 0.702 -0.041 1.472
H12 2.499 -1.110 0.138
H13 -0.749 1.677 -0.108

Atom - Atom Distances (Å)
  N1 C2 C3 C4 O5 O6 H7 H8 H9 H10 H11 H12 H13
N12.53631.47062.44732.57243.58141.01831.01553.45882.80162.07472.84501.8514
C22.53631.52472.53363.64392.88842.60862.97001.09271.09692.15041.09543.5929
C31.47061.52471.54392.40792.42452.05932.07162.15932.17041.09872.17192.2366
C42.44732.53361.54391.33611.20732.91693.29562.71102.84452.11133.48831.8485
O52.57243.64392.40791.33612.24233.03183.44404.00343.79442.91464.51150.9921
O63.58142.88842.42451.20732.24233.95954.39392.59923.16742.82573.92062.9862
H71.01832.60862.05932.91693.03183.95951.63513.63322.47622.90452.89612.3670
H81.01552.97002.07163.29563.44404.39391.63513.91243.39362.25352.91322.6559
H93.45881.09272.15932.71104.00342.59923.63323.91241.76672.50541.78174.1887
H102.80161.09692.17042.84453.79443.16742.47623.39361.76673.06891.77853.7557
H112.07472.15041.09872.11132.91462.82572.90452.25352.50543.06892.48002.7482
H122.84501.09542.17193.48834.51153.92062.89612.91321.78171.77852.48004.2869
H131.85143.59292.23661.84850.99212.98622.36702.65594.18873.75572.74824.2869

picture of Alanine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C3 C2 115.710 N1 C3 C4 108.527
N1 C3 H11 106.812 C2 C3 C4 111.307
C2 C3 H11 109.033 C3 N1 H7 110.348
C3 N1 H8 111.558 C3 C2 H9 110.080
C3 C2 H10 110.707 C3 C2 H12 110.916
C3 C4 O5 113.260 C3 C4 O6 123.116
C4 C3 H11 104.803 C4 O5 H13 104.140
O5 C4 O6 123.596 H7 N1 H8 107.020
H9 C2 H10 107.579 H9 C2 H12 109.035
H10 C2 H12 108.437
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-31G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.803      
2 C -0.517      
3 C -0.140      
4 C 0.628      
5 O -0.593      
6 O -0.471      
7 H 0.341      
8 H 0.344      
9 H 0.215      
10 H 0.174      
11 H 0.209      
12 H 0.167      
13 H 0.448      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  5.013 2.156 0.289 5.464
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -38.404 -0.004 -0.363
y -0.004 -36.893 -0.100
z -0.363 -0.100 -33.056
Traceless
 xyz
x -3.430 -0.004 -0.363
y -0.004 -1.163 -0.100
z -0.363 -0.100 4.593
Polar
3z2-r29.185
x2-y2-1.511
xy-0.004
xz-0.363
yz-0.100


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.786 0.291 0.115
y 0.291 7.232 -0.091
z 0.115 -0.091 5.109


<r2> (average value of r2) Å2
<r2> 162.470
(<r2>)1/2 12.746