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 H2NCH2COOH (Glycine)

using model chemistry: MP2/3-21G*

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes CS 1A'
Energy calculated at MP2/3-21G*
 hartrees
Energy at 0K-281.773205
Energy at 298.15K-281.780074
HF Energy-281.241431
Nuclear repulsion energy176.169253
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 MP2/3-21G*
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' 3497 3327 15.71      
2 A' 3443 3275 0.01      
3 A' 3119 2967 8.73      
4 A' 1774 1687 26.58      
5 A' 1744 1659 108.27      
6 A' 1555 1480 18.53      
7 A' 1412 1343 22.43      
8 A' 1352 1286 5.02      
9 A' 1140 1084 60.37      
10 A' 1085 1032 211.41      
11 A' 874 831 120.78      
12 A' 794 755 162.22      
13 A' 631 600 6.50      
14 A' 458 436 36.34      
15 A' 243 231 10.64      
16 A" 3536 3364 0.16      
17 A" 3165 3010 6.01      
18 A" 1420 1351 0.64      
19 A" 1232 1172 0.47      
20 A" 944 898 1.76      
21 A" 655 623 129.03      
22 A" 521 496 49.15      
23 A" 231 220 56.57      
24 A" 71 67 9.89      

Unscaled Zero Point Vibrational Energy (zpe) 17446.1 cm-1
Scaled (by 0.9513) Zero Point Vibrational Energy (zpe) 16596.4 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 MP2/3-21G*
ABC
0.32713 0.12718 0.09461

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/3-21G*

Point Group is Cs

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.544 0.000
O2 1.201 0.843 0.000
O3 -1.025 1.489 0.000
C4 -0.588 -0.865 0.000
N5 0.444 -1.928 0.000
H6 -0.610 2.395 0.000
H7 -1.228 -0.972 0.881
H8 -1.228 -0.972 -0.881
H9 1.038 -1.845 0.829
H10 1.038 -1.845 -0.829

Atom - Atom Distances (Å)
  C1 O2 O3 C4 N5 H6 H7 H8 H9 H10
C11.23751.39391.52762.51161.94852.14092.14092.73402.7340
O21.23752.31762.47382.87222.38473.15743.15742.81782.8178
O31.39392.31762.39483.71930.99652.62212.62214.00764.0076
C41.52762.47382.39481.48123.26071.09411.09412.07172.0717
N52.51162.87223.71931.48124.44942.11792.11791.02321.0232
H61.94852.38470.99653.26074.44943.53503.53504.62414.6241
H72.14093.15742.62211.09412.11793.53501.76252.42892.9702
H82.14093.15742.62211.09412.11793.53501.76252.97022.4289
H92.73402.81784.00762.07171.02324.62412.42892.97021.6580
H102.73402.81784.00762.07171.02324.62412.97022.42891.6580

picture of Glycine state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 O3 H6 108.053 C1 C4 N5 113.171
C1 C4 H7 108.355 C1 C4 H8 108.355
O2 C1 O3 123.360 O2 C1 C4 126.610
O3 C1 C4 110.031 C4 N5 H9 110.289
C4 N5 H10 110.289 N5 C4 H7 109.735
N5 C4 H8 109.735 H7 C4 H8 107.310
H9 N5 H10 108.236
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at MP2/3-21G* Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C 0.592      
2 O -0.457      
3 O -0.577      
4 C -0.302      
5 N -0.652      
6 H 0.369      
7 H 0.238      
8 H 0.238      
9 H 0.275      
10 H 0.275      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  -0.228 1.270 0.000 1.290
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -32.602 -2.257 0.000
y -2.257 -30.310 0.000
z 0.000 0.000 -27.230
Traceless
 xyz
x -3.832 -2.257 0.000
y -2.257 -0.394 0.000
z 0.000 0.000 4.226
Polar
3z2-r28.451
x2-y2-2.292
xy-2.257
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 0.000 0.000 0.000
y 0.000 0.000 0.000
z 0.000 0.000 0.000


<r2> (average value of r2) Å2
<r2> 0.000
(<r2>)1/2 0.000