Wall clock time and date at job start Sat Apr 11 2020 06:26:39
AMSOL-version 7.1
by G. D. Hawkins, D. J. Giesen, G. C. Lynch, C. C. Chambers,
I. Rossi, J. W. Storer, J. Li, J. D. Thompson, P. Winget,
B. J. Lynch, D. Rinaldi, D. A. Liotard, C. J. Cramer, and D. G. Truhlar
Copyright 2004 by Regents of the University of Minnesota.
All rights reserved.
Notice: recipients of this code are asked to comply
with the user agreement in Section 1 of the documentation file.
*******************************************************************************
* 1SCF - SCF CALCULATION WITHOUT GEOMETRY OPTIMIZATION
* - USE EF ROUTINE FOR MINIMUM SEARCH (DEFAULT)
* GEO-OK - OVERRIDE INTERATOMIC DISTANCE CHECK
* TLIMIT= - A TIME OF 15. SECONDS REQUESTED
* CHARGE - CHARGE ON SYSTEM= -1
* AM1 - THE AM1 HAMILTONIAN TO BE USED
* DEV - DEVELOPER OPTIONS ARE ALLOWED
* SM5.42R - SM5.42R CALCULATIONS WILL BE PERFORMED
* - CHARGE MODEL 2 WILL BE USED (CM2A)
* - THE SOLVENT IS USER-SPECIFIED
* DIELEC - THE SOLVENT DIELECTRIC CONSTANT IS 2.06
* IOFR - THE SOLVENT INDEX OF REFRACTION IS 1.4345
* ALPHA - THE SOLVENT ALPHA IS 0.00
* BETA - THE SOLVENT BETA IS 0.00
* GAMMA - THE SOLVENT MACROSCOPIC SURFACE TENSION IS
* 38.93 CAL MOL^-1 ANGSTROM^-2
* FACARB - THE FRACTION OF AROMATIC CARBONS IS 0.00
* FEHALO - THE FRACTION OF ELECTRONEGATIVE HALOGENS IS 0.00
*******************************************************************************
Atom NO. Chemical Bond length Bond angle Dihedral angle
number (k) symbol (angstroms) (degrees) (degrees)
(I) NA:I NB:NA:I NC:NB:NA:I NA NB NC
1 1 C
2 2 C 1.52999 * 1
3 3 H 1.09000 * 109.46906 * 2 1
4 4 C 1.50697 * 109.47079 * 240.00201 * 2 1 3
5 5 O 1.21283 * 119.99900 * 266.42376 * 4 2 1
6 6 N 1.34776 * 120.00333 * 86.43127 * 4 2 1
7 7 C 1.46500 * 119.99829 * 355.59177 * 6 4 2
8 8 C 1.46494 * 120.00533 * 175.58957 * 6 4 2
9 9 C 1.50702 * 109.47331 * 89.99814 * 8 6 4
10 10 H 1.08005 * 119.99415 * 359.97438 * 9 8 6
11 11 C 1.37879 * 120.00249 * 180.02562 * 9 8 6
12 12 N 1.31508 * 119.99948 * 359.97438 * 11 9 8
13 13 Si 1.86794 * 119.99795 * 180.02562 * 11 9 8
14 14 H 1.48503 * 109.47720 * 359.97438 * 13 11 9
15 15 H 1.48499 * 109.47383 * 119.99785 * 13 11 9
16 16 H 1.48501 * 109.47334 * 239.99659 * 13 11 9
17 17 N 1.46899 * 109.47235 * 119.99884 * 2 1 3
18 18 C 1.46849 * 111.00137 * 172.89322 * 17 2 1
19 19 C 1.53035 * 109.52441 * 174.16277 * 18 17 2
20 20 C 1.53117 * 109.27955 * 59.18224 * 19 18 17
21 21 C 1.53126 * 109.15951 * 302.34254 * 20 19 18
22 22 H 1.09001 * 109.50129 * 297.71856 * 21 20 19
23 23 O 1.45200 * 109.50351 * 177.63571 * 21 20 19
24 24 C 1.34638 * 116.99776 * 90.00198 * 23 21 20
25 25 O 1.21508 * 120.00158 * 0.02562 * 24 23 21
26 26 N 1.34771 * 119.99707 * 179.97438 * 24 23 21
27 27 C 1.46503 * 119.99899 * 179.97438 * 26 24 23
28 28 C 1.46503 * 120.00086 * 0.02562 * 26 24 23
29 29 C 1.46845 * 111.00090 * 48.68754 * 17 2 1
30 30 H 1.09004 * 109.46836 * 172.37546 * 1 2 3
31 31 H 1.09001 * 109.47070 * 292.37222 * 1 2 3
32 32 H 1.08997 * 109.47261 * 52.37785 * 1 2 3
33 33 H 1.08995 * 109.47424 * 84.73168 * 7 6 4
34 34 H 1.09001 * 109.47250 * 204.73357 * 7 6 4
35 35 H 1.09002 * 109.47065 * 324.72862 * 7 6 4
36 36 H 1.09004 * 109.47778 * 209.99965 * 8 6 4
37 37 H 1.09002 * 109.47297 * 330.00282 * 8 6 4
38 38 H 0.96998 * 120.00009 * 180.02562 * 12 11 9
39 39 H 1.09001 * 109.46119 * 294.17779 * 18 17 2
40 40 H 1.09003 * 109.45722 * 54.15391 * 18 17 2
41 41 H 1.09001 * 109.50177 * 179.12639 * 19 18 17
42 42 H 1.09003 * 109.49981 * 299.19577 * 19 18 17
43 43 H 1.08988 * 109.52313 * 62.24750 * 20 19 18
44 44 H 1.08997 * 109.51942 * 182.44340 * 20 19 18
45 45 H 1.08998 * 109.46365 * 90.00593 * 27 26 24
46 46 H 1.09002 * 109.47131 * 210.00056 * 27 26 24
47 47 H 1.08994 * 109.47091 * 330.00727 * 27 26 24
48 48 H 1.08998 * 109.47325 * 89.99659 * 28 26 24
49 49 H 1.08998 * 109.47186 * 209.99559 * 28 26 24
50 50 H 1.08997 * 109.46899 * 329.99685 * 28 26 24
51 51 H 1.09001 * 109.45856 * 305.85314 * 29 17 2
52 52 H 1.08997 * 109.46485 * 65.81890 * 29 17 2
Note: An asterisk (*) indicates this parameter was or will be optimized.
Cartesian coordinates (angstroms)
NO. Atom X Y Z
1 6 0.0000 0.0000 0.0000
2 6 1.5300 0.0000 0.0000
3 1 1.8933 1.0277 0.0000
4 6 2.0323 -0.7104 -1.2305
5 8 2.2962 -1.8932 -1.1826
6 7 2.1885 -0.0313 -2.3841
7 6 1.7793 1.3729 -2.4687
8 6 2.7674 -0.6972 -3.5535
9 6 1.6676 -1.3288 -4.3676
10 1 0.6402 -1.2431 -4.0458
11 6 1.9732 -2.0169 -5.5227
12 7 3.2242 -2.1217 -5.9143
13 14 0.6099 -2.7992 -6.5321
14 1 -0.6995 -2.5388 -5.8817
15 1 0.6090 -2.2170 -7.8982
16 1 0.8363 -4.2643 -6.6186
17 7 2.0197 -0.6925 1.1994
18 6 3.4777 -0.8607 1.1516
19 6 3.9681 -1.4516 2.4754
20 6 3.2871 -2.8030 2.7088
21 6 1.7684 -2.6076 2.7061
22 1 1.4850 -1.9470 3.5255
23 8 1.1139 -3.8932 2.8711
24 6 0.8548 -4.2898 4.1313
25 8 1.1666 -3.5809 5.0676
26 7 0.2487 -5.4727 4.3543
27 6 -0.0328 -5.9046 5.7256
28 6 -0.1278 -6.3272 3.2253
29 6 1.3419 -1.9831 1.3756
30 1 -0.3633 -1.0186 -0.1364
31 1 -0.3633 0.3912 0.9503
32 1 -0.3633 0.6273 -0.8139
33 1 2.5850 2.0088 -2.1021
34 1 1.5603 1.6256 -3.5061
35 1 0.8880 1.5288 -1.8609
36 1 3.2965 0.0349 -4.1638
37 1 3.4645 -1.4680 -3.2248
38 1 3.4391 -2.6054 -6.7271
39 1 3.7391 -1.5333 0.3347
40 1 3.9499 0.1083 0.9894
41 1 5.0484 -1.5908 2.4337
42 1 3.7199 -0.7725 3.2911
43 1 3.5669 -3.4940 1.9138
44 1 3.6006 -3.2073 3.6713
45 1 -1.0197 -5.5499 6.0228
46 1 -0.0075 -6.9932 5.7761
47 1 0.7193 -5.4921 6.3980
48 1 0.6959 -7.0007 2.9890
49 1 -1.0098 -6.9106 3.4895
50 1 -0.3495 -5.7059 2.3576
51 1 0.2627 -1.8295 1.3759
52 1 1.6132 -2.6505 0.5576
RHF calculation, no. of doubly occupied orbitals= 66
REFERENCES FOR PARAMETERS IN GAS-PHASE HAMILTONIAN:
H: (AM1): M.J.S. DEWAR ET AL, J. AM. CHEM. SOC. 107 3902-3909 (1985)
C: (AM1): M.J.S. DEWAR ET AL, J. AM. CHEM. SOC. 107 3902-3909 (1985)
N: (AM1): M.J.S. DEWAR ET AL, J. AM. CHEM. SOC. 107 3902-3909 (1985)
O: (AM1): M.J.S. DEWAR ET AL, J. AM. CHEM. SOC. 107 3902-3909 (1985)
Si: (AM1): M.J.S.DEWAR, C. JIE, ORGANOMETALLICS, 6, 1486-1490 (1987).
REFERENCE FOR CHARGE MODEL 2:
J. Li, J. Xing, C. J. Cramer, and D. G. Truhlar, J. Chem. Phys. 111 (1999) 885.
REFERENCE FOR THE PARAMETERIZATION OF THE SM5.42R SOLVATION MODEL:
J. Li, T. Zhu, G. D. Hawkins, P. Winget, D. A. Liotard, C. J. Cramer, and
D. G. Truhlar, Theor. Chem. Acc. 103 (1999) 9-63
P. Winget, J. D. Thompson C. J. Cramer,and D. G. Truhlar, J. Phys. Chem. B. submitted.
CHARGE=-1 AM1 1SCF TLIMIT=15 GEO-OK SM5.42R
& SOLVNT=GENORG IOFR=1.4345 ALPHA=0.00 BETA=0.00 GAMMA=38.93
& DIELEC=2.06 FACARB=0.00 FEHALO=0.00 DEV
ZINC000497123322.mol2 52
1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED
SCF FIELD WAS ACHIEVED
Wall clock time and date at job start Sat Apr 11 2020 06:26:39
Heat of formation + Delta-G solvation = -96.381011 kcal
Electronic energy + Delta-G solvation = -31874.633998 eV
Core-core repulsion = 27682.066435 eV
Total energy + Delta-G solvation = -4192.567564 eV
No. of doubly occupied orbitals = 66
Molecular weight
(most abundant/longest-lived isotopes) = 341.215 amu
Computer time = 0.82 seconds
Orbital eigenvalues (eV)
-40.79738 -40.05457 -38.02439 -36.58337 -35.63537 -34.83599 -33.92355 -32.57566
-30.39574 -29.84998 -28.35475 -27.77357 -26.41551 -26.00603 -24.82979 -23.53032
-22.80737 -21.47713 -20.60335 -19.95494 -18.47426 -18.03503 -17.26552 -16.60219
-16.52794 -16.45678 -16.13812 -15.11901 -14.93247 -14.84752 -14.64454 -14.47114
-14.32145 -13.75697 -13.55090 -13.38235 -13.27583 -13.03034 -12.91064 -12.81941
-12.66742 -12.37869 -12.28461 -12.21479 -12.06691 -11.78595 -11.67279 -11.44540
-11.22654 -11.07445 -10.97341 -10.82468 -10.72109 -10.66662 -10.61980 -10.49686
-10.18354 -10.00027 -9.67468 -9.53333 -9.05267 -8.47165 -7.84890 -7.66350
-6.07530 -4.12073 1.99167 2.71232 3.26604 3.27239 3.34963 3.39172
3.59072 3.93392 4.14774 4.41841 4.75075 4.82575 4.85631 4.90749
5.02599 5.04784 5.06942 5.12691 5.27119 5.29612 5.31819 5.33062
5.37534 5.46874 5.52359 5.55413 5.60676 5.65076 5.81663 5.86944
5.89583 5.92312 5.92974 6.00606 6.10674 6.12380 6.15752 6.22770
6.24921 6.35352 6.54198 6.95706 7.05989 7.10913 7.12684 7.38457
7.50158 7.88580 8.17376 8.19993 8.36009 8.86116 9.02557 9.53088
11.00628
Molecular weight = 341.21amu
Principal moments of inertia in cm(-1)
A = 0.012193 B = 0.002997 C = 0.002641
Principal moments of inertia in units of 10**(-40)*gram-cm**2
A = 2295.827612 B = 9341.287573 C =10600.228265
Net atomic charges, atomic populations, and dipole contributions
calculated with CM2
Atom NO. Type Charge No. of electrons
1 C -0.144 4.144
2 C 0.063 3.937
3 H 0.102 0.898
4 C 0.480 3.520
5 O -0.538 6.538
6 N -0.599 5.599
7 C 0.080 3.920
8 C 0.245 3.755
9 C -0.523 4.523
10 H 0.057 0.943
11 C 0.060 3.940
12 N -0.895 5.895
13 Si 0.898 3.102
14 H -0.273 1.273
15 H -0.283 1.283
16 H -0.283 1.283
17 N -0.506 5.506
18 C 0.034 3.966
19 C -0.106 4.106
20 C -0.136 4.136
21 C 0.117 3.883
22 H 0.091 0.909
23 O -0.359 6.359
24 C 0.648 3.352
25 O -0.573 6.573
26 N -0.607 5.607
27 C 0.102 3.898
28 C 0.082 3.918
29 C 0.038 3.962
30 H 0.064 0.936
31 H 0.072 0.928
32 H 0.068 0.932
33 H 0.044 0.956
34 H 0.076 0.924
35 H 0.058 0.942
36 H 0.031 0.969
37 H 0.041 0.959
38 H 0.263 0.737
39 H 0.065 0.935
40 H 0.073 0.927
41 H 0.073 0.927
42 H 0.070 0.930
43 H 0.073 0.927
44 H 0.066 0.934
45 H 0.057 0.943
46 H 0.075 0.925
47 H 0.079 0.921
48 H 0.058 0.942
49 H 0.072 0.928
50 H 0.081 0.919
51 H 0.081 0.919
52 H 0.087 0.913
For the charges calculated by CM2:
Dipole moment (debyes) X Y Z Total
from point charges -5.001 -0.473 19.517 20.153
Note: The Mulliken population analysis charges presented below were not
used in the solvation calculation but are provided for completeness.
The chosen solvation model uses CM2 partial charges for calculating
solvation energies.
Net atomic charges, atomic populations, and dipole contributions
using Mulliken population analysis
Atom NO. Type Charge No. of electrons
1 C -0.202 4.202
2 C -0.049 4.049
3 H 0.120 0.880
4 C 0.265 3.735
5 O -0.416 6.416
6 N -0.331 5.331
7 C -0.065 4.065
8 C 0.125 3.875
9 C -0.562 4.562
10 H 0.075 0.925
11 C -0.142 4.142
12 N -0.534 5.534
13 Si 0.725 3.275
14 H -0.198 1.198
15 H -0.210 1.210
16 H -0.209 1.209
17 N -0.231 5.231
18 C -0.093 4.093
19 C -0.144 4.144
20 C -0.174 4.174
21 C 0.062 3.938
22 H 0.109 0.891
23 O -0.272 6.272
24 C 0.403 3.597
25 O -0.462 6.462
26 N -0.349 5.349
27 C -0.039 4.039
28 C -0.060 4.060
29 C -0.090 4.090
30 H 0.083 0.917
31 H 0.091 0.909
32 H 0.087 0.913
33 H 0.063 0.937
34 H 0.095 0.905
35 H 0.077 0.923
36 H 0.049 0.951
37 H 0.059 0.941
38 H 0.072 0.928
39 H 0.083 0.917
40 H 0.092 0.908
41 H 0.091 0.909
42 H 0.089 0.911
43 H 0.091 0.909
44 H 0.085 0.915
45 H 0.075 0.925
46 H 0.094 0.906
47 H 0.098 0.902
48 H 0.077 0.923
49 H 0.091 0.909
50 H 0.100 0.900
51 H 0.099 0.901
52 H 0.105 0.895
Dipole moment (debyes) X Y Z Total
from point charges -4.724 -0.611 20.025 20.584
hybrid contribution -0.497 -0.910 -1.442 1.776
sum -5.221 -1.522 18.583 19.362
Atomic orbital electron populations
1.21871 0.92418 1.03159 1.02751 1.21889 0.97178 0.98750 0.87038
0.87998 1.21441 0.79231 0.87802 0.85053 1.90602 1.51421 1.15167
1.84405 1.48286 1.60725 1.11305 1.12757 1.21720 0.98688 0.82800
1.03249 1.19290 0.94186 0.92925 0.81073 1.21440 0.93630 1.33886
1.07207 0.92481 1.24940 0.95650 0.96071 0.97511 1.69937 1.17135
1.42320 1.24048 0.86449 0.82063 0.79195 0.79752 1.19810 1.20959
1.20887 1.62367 1.05412 1.20440 1.34851 1.22360 0.87465 1.01364
0.98133 1.21452 0.99589 0.95603 0.97721 1.21995 0.94043 0.98805
1.02558 1.22632 0.91477 0.80256 0.99480 0.89116 1.86267 1.73673
1.39880 1.27402 1.18063 0.77400 0.82043 0.82219 1.90965 1.57473
1.54520 1.43224 1.46493 1.61892 1.17975 1.08524 1.21644 1.01780
0.99892 0.80621 1.21813 1.00445 0.94915 0.88866 1.22312 0.99337
0.91293 0.96016 0.91728 0.90892 0.91273 0.93739 0.90513 0.92295
0.95088 0.94117 0.92777 0.91715 0.90814 0.90858 0.91094 0.90850
0.91498 0.92461 0.90650 0.90237 0.92328 0.90876 0.90001 0.90075
0.89511
Number of geometries 1
Number of calculations of the screened coulomb radii 1
The total number of SCF iterations 13.
Note: The number of geometries may not
correspond to the number of cycles due to rejected geometry changes.
In the following table subtotal= G_P + SS G_CDS.
Atom Chem. CM2 G_P Area Sigma k SS G_CDS Subtotal M
number symbol chg. (kcal) (Ang**2) cal/(Ang**2) (kcal) (kcal) value
1 C -0.14 -1.89 8.09 37.16 0.30 -1.59 16
2 C 0.06 0.94 2.14 -68.87 -0.15 0.80 16
3 H 0.10 1.32 7.12 -51.93 -0.37 0.95 16
4 C 0.48 9.50 5.90 -10.99 -0.06 9.43 16
5 O -0.54 -12.72 11.97 5.55 0.07 -12.65 16
6 N -0.60 -12.31 2.86 -182.96 -0.52 -12.84 16
7 C 0.08 1.22 9.64 59.85 0.58 1.79 16
8 C 0.24 6.30 5.10 -5.20 -0.03 6.28 16
9 C -0.52 -14.68 9.39 -34.44 -0.32 -15.00 16
10 H 0.06 1.61 7.81 -52.48 -0.41 1.20 16
11 C 0.06 1.71 5.46 -17.82 -0.10 1.61 16
12 N -0.90 -26.48 13.29 55.43 0.74 -25.74 16
13 Si 0.90 21.76 29.54 -169.99 -5.02 16.74 16
14 H -0.27 -6.53 7.11 56.52 0.40 -6.13 16
15 H -0.28 -6.70 7.11 56.52 0.40 -6.30 16
16 H -0.28 -6.87 7.11 56.52 0.40 -6.46 16
17 N -0.51 -7.43 4.73 -228.08 -1.08 -8.51 16
18 C 0.03 0.50 4.88 -3.83 -0.02 0.48 16
19 C -0.11 -1.33 6.09 -26.65 -0.16 -1.49 16
20 C -0.14 -1.88 5.64 -26.61 -0.15 -2.03 16
21 C 0.12 1.71 2.62 -26.65 -0.07 1.64 16
22 H 0.09 1.38 7.16 -51.93 -0.37 1.01 16
23 O -0.36 -5.30 8.71 -40.32 -0.35 -5.65 16
24 C 0.65 9.24 8.37 54.05 0.45 9.70 16
25 O -0.57 -9.46 15.18 -19.28 -0.29 -9.76 16
26 N -0.61 -6.56 3.27 -195.40 -0.64 -7.20 16
27 C 0.10 0.79 10.44 59.85 0.62 1.42 16
28 C 0.08 0.68 10.44 59.85 0.62 1.31 16
29 C 0.04 0.59 4.29 -3.83 -0.02 0.57 16
30 H 0.06 0.94 6.68 -51.93 -0.35 0.59 16
31 H 0.07 0.81 8.14 -51.93 -0.42 0.39 16
32 H 0.07 0.84 6.46 -51.93 -0.34 0.50 16
33 H 0.04 0.58 8.14 -51.93 -0.42 0.15 16
34 H 0.08 1.22 8.03 -51.93 -0.42 0.80 16
35 H 0.06 0.75 5.36 -51.93 -0.28 0.47 16
36 H 0.03 0.81 8.07 -51.93 -0.42 0.39 16
37 H 0.04 1.19 7.49 -51.93 -0.39 0.80 16
38 H 0.26 7.32 8.31 -40.82 -0.34 6.98 16
39 H 0.06 1.17 5.98 -51.93 -0.31 0.85 16
40 H 0.07 0.99 8.12 -51.93 -0.42 0.56 16
41 H 0.07 0.82 8.14 -51.93 -0.42 0.39 16
42 H 0.07 0.85 8.14 -51.93 -0.42 0.42 16
43 H 0.07 1.09 8.14 -51.94 -0.42 0.67 16
44 H 0.07 0.90 8.14 -51.93 -0.42 0.48 16
45 H 0.06 0.39 8.14 -51.93 -0.42 -0.03 16
46 H 0.07 0.37 8.07 -51.93 -0.42 -0.04 16
47 H 0.08 0.71 7.42 -51.93 -0.39 0.32 16
48 H 0.06 0.45 8.14 -51.93 -0.42 0.03 16
49 H 0.07 0.41 8.07 -51.93 -0.42 -0.01 16
50 H 0.08 0.77 7.37 -51.93 -0.38 0.39 16
51 H 0.08 1.19 5.99 -51.93 -0.31 0.88 16
52 H 0.09 1.64 5.73 -51.93 -0.30 1.34 16
LS Contribution 403.75 15.07 6.08 6.08
Total: -1.00 -34.66 403.75 -8.32 -42.98
By element:
Atomic # 1 Polarization: 10.42 SS G_CDS: -8.80 Total: 1.62 kcal
Atomic # 6 Polarization: 13.42 SS G_CDS: 1.50 Total: 14.92 kcal
Atomic # 7 Polarization: -52.78 SS G_CDS: -1.51 Total: -54.28 kcal
Atomic # 8 Polarization: -27.49 SS G_CDS: -0.58 Total: -28.06 kcal
Atomic # 14 Polarization: 21.76 SS G_CDS: -5.02 Total: 16.74 kcal
Total LS contribution 6.08 Total: 6.08 kcal
Total: -34.66 -8.32 -42.98 kcal
The number of atoms in the molecule is 52
The average number of expansion shells was 16.00
The maximum number of expansion shells was 16
The minimum number of expansion shells was 16
**** NOTA BENE ****
This is the net solvation energy for this exact molecular structure
(nuclear and electronic)! The standard-state solvation energy should be
obtained as the difference between the heat of formation plus delta-G solvation
for the relaxed solvated system and that for the relaxed gas-phase system.
ZINC000497123322.mol2 52
1SCF run
This is a breakdown of the solvation energy calculated
without geometric relaxation in solution:
(1) E-EN(sol) electronic-nuclear energy of solute -53.399 kcal
(2) G-P(sol) polarization free energy of solvation -34.663 kcal
(3) G-ENP(sol) elect.-nuc.-pol. free energy of system -88.063 kcal
(4) G-CDS(sol) cavity-dispersion-solvent structure free energy -8.318 kcal
(5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -42.982 kcal
(6) G-S(sol) free energy of system = (1) + (5) -96.381 kcal
1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED
Total computer time = 0.83 seconds