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

using model chemistry: PBEPBE/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 PBEPBE/3-21G*
 hartrees
Energy at 0K-321.587830
Energy at 298.15K-321.597360
Nuclear repulsion energy247.421738
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 PBEPBE/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 3424 3265 6.66      
2 A 3322 3168 0.38      
3 A 3081 2938 5.10      
4 A 3059 2917 21.23      
5 A 3014 2873 7.56      
6 A 2985 2846 14.74      
7 A 2367 2256 311.56      
8 A 1727 1646 333.96      
9 A 1650 1573 45.30      
10 A 1519 1448 16.98      
11 A 1507 1437 77.29      
12 A 1493 1424 366.67      
13 A 1400 1335 20.56      
14 A 1342 1280 18.50      
15 A 1280 1220 2.16      
16 A 1218 1161 18.43      
17 A 1170 1116 73.95      
18 A 1149 1096 23.99      
19 A 1090 1040 11.32      
20 A 1053 1004 29.99      
21 A 1005 958 1.41      
22 A 933 889 50.64      
23 A 821 783 86.92      
24 A 752 717 10.58      
25 A 704 672 0.86      
26 A 578 551 1.09      
27 A 507 483 3.35      
28 A 438 418 31.77      
29 A 375 358 6.66      
30 A 330 314 14.79      
31 A 267 254 9.81      
32 A 237 226 1.68      
33 A 81 77 2.91      

Unscaled Zero Point Vibrational Energy (zpe) 22937.7 cm-1
Scaled (by 0.9535) Zero Point Vibrational Energy (zpe) 21871.1 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 PBEPBE/3-21G*
ABC
0.15388 0.11687 0.07159

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

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 -1.137 -1.288 -0.002
C2 -1.356 1.270 -0.250
C3 -0.655 0.080 0.413
C4 0.879 0.109 0.064
O5 1.328 -1.145 -0.215
O6 1.546 1.152 0.067
H7 -1.593 -1.253 -0.931
H8 -1.778 -1.719 0.683
H9 -0.747 2.166 -0.042
H10 -1.385 1.134 -1.347
H11 -0.737 0.148 1.513
H12 -2.382 1.417 0.127
H13 0.383 -1.686 -0.167

Atom - Atom Distances (Å)
  N1 C2 C3 C4 O5 O6 H7 H8 H9 H10 H11 H12 H13
N12.57991.50862.45372.47853.62761.03531.03253.47612.78182.12592.98061.5800
C22.57991.53262.53843.61102.92162.62393.16031.10291.10562.17951.10273.4312
C31.50861.53261.57312.41352.47242.11202.13832.13692.17761.10542.20312.1288
C42.45372.53841.57311.36051.23852.99213.28432.62392.85822.17073.51421.8768
O52.47853.61102.41351.36052.32473.00923.28413.91073.71982.98714.52151.0904
O63.62762.92162.47241.23852.32474.07804.43592.50883.25432.88273.93723.0767
H71.03532.62392.11202.99213.00924.07801.69013.63192.43162.94412.97792.1621
H81.03253.16032.13833.28433.28414.43591.69014.08463.52382.29413.24212.3225
H93.47611.10292.13692.62393.91072.50883.63194.08461.78192.54681.80654.0162
H102.78181.10562.17762.85823.71983.25432.43163.52381.78193.09361.80143.5318
H112.12592.17951.10542.17072.98712.88272.94412.29412.54683.09362.49742.7282
H122.98061.10272.20313.51424.52153.93722.97793.24211.80651.80142.49744.1668
H131.58003.43122.12881.87681.09043.07672.16212.32254.01623.53182.72824.1668

picture of Alanine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C3 C2 116.051 N1 C3 C4 105.522
N1 C3 H11 107.835 C2 C3 C4 109.629
C2 C3 H11 110.368 C3 N1 H7 110.869
C3 N1 H8 113.264 C3 C2 H9 107.224
C3 C2 H10 110.207 C3 C2 H12 112.412
C3 C4 O5 110.499 C3 C4 O6 122.683
C4 C3 H11 106.978 C4 O5 H13 99.355
O5 C4 O6 126.816 H7 N1 H8 109.647
H9 C2 H10 107.574 H9 C2 H12 109.979
H10 C2 H12 109.316
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at PBEPBE/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.681      
2 C -0.593      
3 C -0.249      
4 C 0.623      
5 O -0.532      
6 O -0.465      
7 H 0.309      
8 H 0.309      
9 H 0.249      
10 H 0.207      
11 H 0.257      
12 H 0.203      
13 H 0.363      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -5.926 -1.869 0.447 6.230
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -38.770 1.731 0.473
y 1.731 -36.498 -0.533
z 0.473 -0.533 -33.234
Traceless
 xyz
x -3.903 1.731 0.473
y 1.731 -0.496 -0.533
z 0.473 -0.533 4.399
Polar
3z2-r28.799
x2-y2-2.272
xy1.731
xz0.473
yz-0.533


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.481 0.436 -0.129
y 0.436 6.965 0.116
z -0.129 0.116 4.657


<r2> (average value of r2) Å2
<r2> 164.923
(<r2>)1/2 12.842