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: B3PW91/6-311G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at B3PW91/6-311G*
 hartrees
Energy at 0K-323.702806
Energy at 298.15K-323.712357
Nuclear repulsion energy250.524474
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 B3PW91/6-311G*
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 3615 3480 4.98      
2 A 3526 3395 0.17      
3 A 3423 3296 233.17      
4 A 3149 3031 8.91      
5 A 3113 2997 32.27      
6 A 3051 2937 19.43      
7 A 3043 2929 12.38      
8 A 1874 1805 303.72      
9 A 1709 1645 45.47      
10 A 1511 1455 16.59      
11 A 1501 1445 5.39      
12 A 1459 1404 441.15      
13 A 1415 1362 14.72      
14 A 1401 1349 2.28      
15 A 1322 1272 8.73      
16 A 1245 1198 9.13      
17 A 1225 1180 14.12      
18 A 1161 1118 10.45      
19 A 1105 1063 50.41      
20 A 1024 986 1.38      
21 A 947 912 64.91      
22 A 916 882 68.21      
23 A 879 847 111.72      
24 A 811 781 8.87      
25 A 744 716 8.65      
26 A 568 547 5.12      
27 A 535 515 0.93      
28 A 409 394 5.21      
29 A 373 359 16.45      
30 A 316 305 13.46      
31 A 275 265 12.21      
32 A 228 219 0.34      
33 A 76 73 1.19      

Unscaled Zero Point Vibrational Energy (zpe) 23972.9 cm-1
Scaled (by 0.9627) Zero Point Vibrational Energy (zpe) 23078.8 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 B3PW91/6-311G*
ABC
0.16252 0.11590 0.07215

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3PW91/6-311G*

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
N1 1.066 1.346 -0.032
C2 1.465 -1.149 -0.199
C3 0.643 -0.002 0.372
C4 -0.857 -0.166 0.053
O5 -1.480 0.995 -0.155
O6 -1.410 -1.231 0.027
H7 1.422 1.341 -0.982
H8 1.800 1.706 0.564
H9 1.047 -2.107 0.112
H10 1.455 -1.128 -1.294
H11 0.696 -0.035 1.467
H12 2.503 -1.090 0.137
H13 -0.773 1.678 -0.107

Atom - Atom Distances (Å)
  N1 C2 C3 C4 O5 O6 H7 H8 H9 H10 H11 H12 H13
N12.53241.46942.44822.57303.57501.01481.01183.45622.80452.07222.83401.8699
C22.53241.52212.53323.64222.88502.61042.97421.09051.09502.14651.09343.6059
C31.46941.52211.54232.40352.41822.05992.07162.15912.16841.09732.16792.2479
C42.44822.53321.54231.33401.20022.92203.29052.71862.84282.10473.48571.8528
O52.57303.64222.40351.33402.23443.03773.43234.00913.79682.90274.50520.9841
O63.57502.88502.41821.20022.23443.95724.38442.60973.15702.81803.91772.9807
H71.01482.61042.05992.92203.03773.95721.63343.63682.48862.90202.88672.3871
H81.01182.97422.07163.29053.43234.38441.63343.91273.40632.25082.91482.6590
H93.45621.09052.15912.71864.00912.60973.63683.91271.76142.49991.77634.2045
H102.80451.09502.16842.84283.79683.15702.48863.40631.76143.06491.77463.7738
H112.07222.14651.09732.10472.90272.81802.90202.25082.49993.06492.47942.7511
H122.83401.09342.16793.48574.50523.91772.88672.91481.77631.77462.47944.2956
H131.86993.60592.24791.85280.98412.98072.38712.65904.20453.77382.75114.2956

picture of Alanine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
N1 C3 C2 115.661 N1 C3 C4 108.734
N1 C3 H11 106.776 C2 C3 C4 111.507
C2 C3 H11 108.985 C3 N1 H7 110.703
C3 N1 H8 111.894 C3 C2 H9 110.371
C3 C2 H10 110.841 C3 C2 H12 110.903
C3 C4 O5 113.158 C3 C4 O6 123.217
C4 C3 H11 104.486 C4 O5 H13 105.119
O5 C4 O6 123.601 H7 N1 H8 107.407
H9 C2 H10 107.401 H9 C2 H12 108.854
H10 C2 H12 108.369
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3PW91/6-311G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 N -0.824      
2 C -0.646      
3 C -0.257      
4 C 0.496      
5 O -0.500      
6 O -0.346      
7 H 0.346      
8 H 0.354      
9 H 0.259      
10 H 0.222      
11 H 0.258      
12 H 0.219      
13 H 0.420      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  5.024 2.220 0.333 5.502
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -39.279 0.040 -0.337
y 0.040 -37.372 -0.083
z -0.337 -0.083 -33.443
Traceless
 xyz
x -3.872 0.040 -0.337
y 0.040 -1.011 -0.083
z -0.337 -0.083 4.883
Polar
3z2-r29.766
x2-y2-1.908
xy0.040
xz-0.337
yz-0.083


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 7.139 0.178 0.080
y 0.178 7.629 -0.048
z 0.080 -0.048 5.427


<r2> (average value of r2) Å2
<r2> 162.292
(<r2>)1/2 12.739