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: HF/TZVP

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/TZVP
 hartrees
Energy at 0K-321.986030
Energy at 298.15K-321.995798
HF Energy-321.986030
Nuclear repulsion energy252.014573
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/TZVP
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 4010 3643 217.71      
2 A 3820 3471 12.28      
3 A 3733 3391 6.40      
4 A 3280 2980 12.60      
5 A 3231 2936 43.84      
6 A 3192 2900 13.88      
7 A 3171 2881 21.04      
8 A 2019 1835 402.07      
9 A 1804 1639 44.34      
10 A 1620 1472 13.71      
11 A 1611 1464 2.51      
12 A 1544 1403 39.66      
13 A 1535 1395 215.66      
14 A 1510 1372 198.15      
15 A 1441 1309 71.66      
16 A 1337 1215 12.02      
17 A 1319 1198 5.30      
18 A 1250 1135 16.07      
19 A 1176 1068 62.49      
20 A 1100 1000 1.01      
21 A 1013 920 41.53      
22 A 946 860 112.31      
23 A 880 799 5.00      
24 A 811 737 9.01      
25 A 803 730 144.99      
26 A 601 546 11.14      
27 A 573 520 2.20      
28 A 441 401 6.86      
29 A 382 347 11.18      
30 A 302 274 16.92      
31 A 291 264 14.47      
32 A 250 227 1.00      
33 A 61 55 1.38      

Unscaled Zero Point Vibrational Energy (zpe) 25526.6 cm-1
Scaled (by 0.9086) Zero Point Vibrational Energy (zpe) 23193.5 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/TZVP
ABC
0.16646 0.11541 0.07255

See section I.F.4 to change rotational constant units
Geometric Data calculated at HF/TZVP

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 1.050 1.366 -0.066
C2 1.495 -1.109 -0.166
C3 0.640 0.033 0.368
C4 -0.845 -0.181 0.052
O5 -1.547 0.923 -0.111
O6 -1.340 -1.250 -0.012
H7 1.334 1.367 -1.025
H8 1.815 1.709 0.475
H9 1.136 -2.060 0.201
H10 1.464 -1.137 -1.251
H11 0.682 0.027 1.453
H12 2.525 -0.975 0.145
H13 -0.955 1.666 -0.070

Atom - Atom Distances (Å)
  N1 C2 C3 C4 O5 O6 H7 H8 H9 H10 H11 H12 H13
N12.51671.46012.44892.63453.54341.00080.99783.43702.79982.05742.77482.0272
C22.51671.52352.52623.65812.84182.62572.90771.08021.08532.13861.08433.7026
C31.46011.52351.53302.40872.38962.04972.04952.15752.16071.08582.14912.3238
C42.44892.52621.53301.31841.17972.88183.29042.73402.81832.08253.46301.8541
O52.63453.65812.40871.31842.18523.05493.50204.02373.82202.86624.49930.9504
O63.54342.84182.38961.17972.18523.87614.35272.61323.06742.80443.87712.9416
H71.00082.62572.04972.88183.05493.87611.61203.64472.51702.89152.87602.4984
H80.99782.90772.04953.29043.50204.35271.61203.83913.34632.25132.79572.8237
H93.43701.08022.15752.73404.02372.61323.64473.83911.75122.47591.76284.2806
H102.79981.08532.16072.81833.82203.06742.51703.34631.75123.04581.76013.8859
H112.05742.13861.08582.08252.86622.80442.89152.25132.47593.04582.47202.7718
H122.77481.08432.14913.46304.49933.87712.87602.79571.76281.76012.47204.3735
H132.02723.70262.32381.85410.95042.94162.49842.82374.28063.88592.77184.3735

picture of Alanine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C3 C2 115.009 N1 C3 C4 109.783
N1 C3 H11 106.911 C2 C3 C4 111.481
C2 C3 H11 108.933 C3 N1 H7 111.432
C3 N1 H8 111.607 C3 C2 H9 110.768
C3 C2 H10 110.716 C3 C2 H12 109.854
C3 C4 O5 115.081 C3 C4 O6 122.964
C4 C3 H11 104.041 C4 O5 H13 108.519
O5 C4 O6 121.933 H7 N1 H8 107.528
H9 C2 H10 107.936 H9 C2 H12 109.063
H10 C2 H12 108.440
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at HF/TZVP Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.539      
2 C -0.289      
3 C 0.104      
4 C 0.308      
5 O -0.336      
6 O -0.415      
7 H 0.212      
8 H 0.220      
9 H 0.127      
10 H 0.081      
11 H 0.118      
12 H 0.087      
13 H 0.322      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  5.077 2.443 0.363 5.646
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -40.159 -1.056 -0.367
y -1.056 -38.205 -0.160
z -0.367 -0.160 -33.575
Traceless
 xyz
x -4.269 -1.056 -0.367
y -1.056 -1.338 -0.160
z -0.367 -0.160 5.607
Polar
3z2-r211.214
x2-y2-1.954
xy-1.056
xz-0.367
yz-0.160


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 6.897 0.249 0.066
y 0.249 7.430 -0.031
z 0.066 -0.031 5.536


<r2> (average value of r2) Å2
<r2> 161.138
(<r2>)1/2 12.694