return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

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

using model chemistry: BLYP/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 BLYP/6-31G**
 hartrees
Energy at 0K-323.649157
Energy at 298.15K-323.658482
Nuclear repulsion energy247.140639
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 BLYP/6-31G**
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 3470 3444 1.63      
2 A 3382 3356 0.64      
3 A 3225 3200 258.85      
4 A 3072 3048 7.92      
5 A 3037 3013 31.35      
6 A 2973 2950 28.32      
7 A 2966 2943 4.04      
8 A 1789 1775 240.42      
9 A 1622 1610 23.60      
10 A 1477 1465 8.24      
11 A 1467 1456 3.52      
12 A 1404 1394 361.10      
13 A 1378 1368 3.30      
14 A 1353 1343 10.74      
15 A 1281 1271 7.03      
16 A 1191 1182 5.02      
17 A 1171 1162 22.66      
18 A 1102 1094 10.54      
19 A 1050 1042 45.17      
20 A 992 985 1.83      
21 A 924 917 69.61      
22 A 890 883 60.10      
23 A 834 828 74.98      
24 A 766 760 6.26      
25 A 701 696 6.51      
26 A 542 538 3.95      
27 A 507 503 0.54      
28 A 397 394 4.99      
29 A 348 345 16.72      
30 A 302 300 16.72      
31 A 265 263 13.73      
32 A 220 218 0.30      
33 A 77 77 1.27      

Unscaled Zero Point Vibrational Energy (zpe) 23087.6 cm-1
Scaled (by 0.9923) Zero Point Vibrational Energy (zpe) 22909.9 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 BLYP/6-31G**
ABC
0.15793 0.11292 0.07023

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 1.079 1.366 -0.028
C2 1.481 -1.166 -0.207
C3 0.654 -0.007 0.380
C4 -0.866 -0.167 0.054
O5 -1.496 1.017 -0.160
O6 -1.436 -1.247 0.030
H7 1.434 1.347 -0.992
H8 1.849 1.701 0.559
H9 1.038 -2.128 0.088
H10 1.483 -1.125 -1.309
H11 0.716 -0.041 1.483
H12 2.523 -1.127 0.146
H13 -0.753 1.689 -0.105

Atom - Atom Distances (Å)
  N1 C2 C3 C4 O5 O6 H7 H8 H9 H10 H11 H12 H13
N12.57001.49412.47792.60153.62691.02711.02453.49592.82922.09642.88591.8620
C22.57001.54002.56393.69182.92752.63372.99101.09871.10312.16911.10123.6269
C31.49411.54001.56272.44172.45512.07972.09252.17512.18831.10512.19162.2566
C42.47792.56391.56271.35851.22112.94593.33402.73352.87972.13563.52371.8666
O52.60153.69182.44171.35852.27293.06363.48834.04673.84452.95174.56541.0030
O63.62692.92752.45511.22112.27294.00154.44532.62733.21402.86303.96303.0174
H71.02712.63372.07972.94593.06364.00151.64373.66042.49232.92702.93242.3851
H81.02452.99102.09253.33403.48834.44531.64373.94253.40712.27452.93682.6848
H93.49591.09872.17512.73354.04672.62733.66043.94251.77662.53061.79204.2210
H102.82921.10312.18832.87973.84453.21402.49233.40711.77663.09121.78823.7905
H112.09642.16911.10512.13562.95172.86302.92702.27452.53063.09122.49642.7701
H122.88591.10122.19163.52374.56543.96302.93242.93681.79201.78822.49644.3274
H131.86203.62692.25661.86661.00303.01742.38512.68484.22103.79052.77014.3274

picture of Alanine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C3 C2 115.773 N1 C3 C4 108.288
N1 C3 H11 106.566 C2 C3 C4 111.442
C2 C3 H11 109.070 C3 N1 H7 109.762
C3 N1 H8 110.991 C3 C2 H9 109.907
C3 C2 H10 110.690 C3 C2 H12 111.055
C3 C4 O5 113.228 C3 C4 O6 123.283
C4 C3 H11 105.060 C4 O5 H13 103.427
O5 C4 O6 123.461 H7 N1 H8 106.481
H9 C2 H10 107.584 H9 C2 H12 109.087
H10 C2 H12 108.431
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at BLYP/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.594      
2 C -0.281      
3 C -0.031      
4 C 0.554      
5 O -0.457      
6 O -0.440      
7 H 0.246      
8 H 0.245      
9 H 0.134      
10 H 0.098      
11 H 0.123      
12 H 0.086      
13 H 0.318      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  4.802 2.054 0.255 5.229
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -38.480 -0.002 -0.386
y -0.002 -37.089 -0.114
z -0.386 -0.114 -33.469
Traceless
 xyz
x -3.201 -0.002 -0.386
y -0.002 -1.114 -0.114
z -0.386 -0.114 4.315
Polar
3z2-r28.631
x2-y2-1.391
xy-0.002
xz-0.386
yz-0.114


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.277 0.298 0.134
y 0.298 7.671 -0.097
z 0.134 -0.097 5.309


<r2> (average value of r2) Å2
<r2> 166.154
(<r2>)1/2 12.890