Wall clock time and date at job start Tue Mar 31 2020 22:12:46
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 1.53005 * 1
3 3 H 1.09002 * 115.55067 * 2 1
4 4 C 1.52999 * 117.51737 * 214.30034 * 2 1 3
5 5 C 1.53005 * 117.49765 * 145.67013 * 2 1 3
6 6 H 1.09005 * 117.49361 * 215.02494 * 5 2 1
7 7 C 1.50698 * 117.49963 * 0.02562 * 5 2 1
8 8 O 1.21281 * 119.99784 * 359.97438 * 7 5 2
9 9 N 1.34774 * 119.99944 * 180.02562 * 7 5 2
10 10 C 1.46924 * 120.63003 * 359.71435 * 9 7 5
11 11 C 1.53629 * 108.54476 * 126.37087 * 10 9 7
12 12 C 1.53037 * 109.23995 * 54.85553 * 11 10 9
13 13 C 1.52999 * 109.46280 * 178.49167 * 12 11 10
14 14 C 1.52998 * 109.47313 * 295.07080 * 13 12 11
15 15 N 1.46900 * 109.47081 * 179.97438 * 14 13 12
16 16 C 1.46907 * 110.99586 * 179.97438 * 15 14 13
17 17 C 1.50703 * 109.46618 * 180.02562 * 16 15 14
18 18 O 1.21290 * 120.00045 * 359.97438 * 17 16 15
19 19 N 1.34778 * 119.99807 * 180.02562 * 17 16 15
20 20 C 1.37095 * 120.00123 * 179.97438 * 19 17 16
21 21 H 1.07996 * 119.99889 * 0.02562 * 20 19 17
22 22 C 1.38945 * 119.99866 * 179.97438 * 20 19 17
23 23 N 1.31414 * 120.00327 * 0.02562 * 22 20 19
24 24 Si 1.86801 * 119.99874 * 180.02562 * 22 20 19
25 25 H 1.48499 * 109.47036 * 90.00196 * 24 22 20
26 26 H 1.48500 * 109.47420 * 210.00397 * 24 22 20
27 27 H 1.48504 * 109.47375 * 330.00288 * 24 22 20
28 28 C 1.53040 * 109.53862 * 298.51500 * 12 11 10
29 29 C 1.46925 * 120.62997 * 179.97438 * 9 7 5
30 30 H 1.08996 * 109.46543 * 274.41652 * 1 2 3
31 31 H 1.08999 * 109.47163 * 34.41886 * 1 2 3
32 32 H 1.09000 * 109.46851 * 154.42084 * 1 2 3
33 33 H 1.09003 * 117.50034 * 0.02562 * 4 2 1
34 34 H 1.08995 * 117.49797 * 145.02727 * 4 2 1
35 35 H 1.09001 * 109.59145 * 246.20294 * 10 9 7
36 36 H 1.09001 * 109.59070 * 6.63062 * 10 9 7
37 37 H 1.09002 * 109.63200 * 294.87089 * 11 10 9
38 38 H 1.08997 * 109.45978 * 174.73986 * 11 10 9
39 39 H 1.08998 * 109.45880 * 58.53126 * 12 11 10
40 40 H 1.09005 * 109.46700 * 55.06762 * 13 12 11
41 41 H 1.09002 * 109.47284 * 175.06678 * 13 12 11
42 42 H 1.08996 * 109.46768 * 300.00084 * 14 13 12
43 43 H 1.09003 * 109.46789 * 59.99380 * 14 13 12
44 44 H 1.00900 * 110.99687 * 56.04813 * 15 14 13
45 45 H 1.08998 * 109.46948 * 300.00128 * 16 15 14
46 46 H 1.09004 * 109.46860 * 60.00414 * 16 15 14
47 47 H 0.97009 * 119.99855 * 359.97438 * 19 17 16
48 48 H 0.96994 * 119.99967 * 179.97438 * 23 22 20
49 49 H 1.08998 * 109.50059 * 301.40895 * 28 12 11
50 50 H 1.09006 * 109.52668 * 181.33208 * 28 12 11
51 51 H 1.08990 * 109.58574 * 353.37239 * 29 9 7
52 52 H 1.09000 * 109.58587 * 113.79769 * 29 9 7
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 2.0002 0.9834 0.0000
4 6 2.2369 -1.1209 -0.7647
5 6 2.2365 -1.1208 0.7654
6 1 3.1712 -0.8745 1.2692
7 6 1.3721 -2.1405 1.4611
8 8 0.1639 -2.0531 1.4014
9 7 1.9416 -3.1489 2.1503
10 6 3.4037 -3.2709 2.2274
11 6 3.8096 -3.3566 3.7066
12 6 3.0475 -4.5043 4.3730
13 6 3.4759 -4.6183 5.8373
14 6 4.9517 -5.0156 5.9076
15 7 5.3631 -5.1244 7.3136
16 6 6.7778 -5.5059 7.4201
17 6 7.1624 -5.6080 8.8737
18 8 6.3391 -5.3846 9.7359
19 7 8.4213 -5.9467 9.2154
20 6 8.7714 -6.0391 10.5377
21 1 8.0382 -5.8410 11.3055
22 6 10.0692 -6.3888 10.8900
23 7 10.9612 -6.6304 9.9557
24 14 10.5459 -6.5154 12.6917
25 1 10.3077 -7.9008 13.1705
26 1 11.9836 -6.1779 12.8483
27 1 9.7255 -5.5683 13.4886
28 6 1.5437 -4.2297 4.3016
29 6 1.1121 -4.1504 2.8342
30 1 -0.3632 0.0791 1.0246
31 1 -0.3633 0.8477 -0.5809
32 1 -0.3633 -0.9270 -0.4437
33 1 1.6120 -1.8585 -1.2683
34 1 3.1721 -0.8750 -1.2677
35 1 3.7233 -4.1728 1.7052
36 1 3.8680 -2.3974 1.7697
37 1 3.5671 -2.4195 4.2078
38 1 4.8814 -3.5412 3.7789
39 1 3.2712 -5.4373 3.8557
40 1 3.3342 -3.6579 6.3331
41 1 2.8713 -5.3767 6.3348
42 1 5.0934 -5.9759 5.4118
43 1 5.5562 -4.2572 5.4101
44 1 4.7750 -5.7746 7.8131
45 1 6.9316 -6.4699 6.9353
46 1 7.3952 -4.7513 6.9327
47 1 9.0798 -6.1250 8.5257
48 1 11.8672 -6.8741 10.2017
49 1 1.3225 -3.2844 4.7972
50 1 1.0022 -5.0356 4.7971
51 1 0.0639 -3.8573 2.7770
52 1 1.2482 -5.1226 2.3606
RHF calculation, no. of doubly occupied orbitals= 65
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
ZINC001495395035.mol2 52
1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED
SCF FIELD WAS ACHIEVED
Wall clock time and date at job start Tue Mar 31 2020 22:12:46
Heat of formation + Delta-G solvation = -59.565221 kcal
Electronic energy + Delta-G solvation = -28508.330569 eV
Core-core repulsion = 24507.815509 eV
Total energy + Delta-G solvation = -4000.515060 eV
No. of doubly occupied orbitals = 65
Molecular weight
(most abundant/longest-lived isotopes) = 337.215 amu
Computer time = 0.83 seconds
Orbital eigenvalues (eV)
-40.84020 -38.83278 -38.23329 -36.84961 -35.87041 -34.11735 -33.60877 -31.61540
-31.22629 -29.85673 -28.82677 -26.82144 -25.38709 -24.28626 -23.62377 -23.11171
-21.69672 -21.17782 -20.46288 -19.21053 -18.99693 -17.89175 -17.79199 -16.21391
-16.14294 -15.90755 -15.69891 -15.11997 -14.80487 -14.70078 -14.55721 -14.38518
-14.11550 -13.89721 -13.81316 -13.47782 -13.31522 -13.11707 -12.96877 -12.93478
-12.54844 -12.48478 -12.16315 -11.87334 -11.86497 -11.61032 -11.54677 -11.51781
-11.28048 -11.05400 -10.99346 -10.69012 -10.65989 -10.49666 -10.39563 -10.34215
-10.21854 -9.81277 -9.51282 -8.96949 -8.45986 -8.04775 -7.95895 -6.42104
-3.82912 2.16100 2.59852 3.17573 3.26209 3.32396 3.37286 3.90832
4.03143 4.06967 4.20968 4.26426 4.38474 4.41008 4.49583 4.61858
4.66053 4.75803 4.90262 4.98339 5.04527 5.08782 5.09775 5.22976
5.24539 5.28962 5.31261 5.37988 5.39494 5.46582 5.49684 5.52559
5.57585 5.65257 5.70826 5.74970 5.77385 5.78962 5.80150 5.94717
5.99723 6.08206 6.16060 6.23332 6.24655 6.29610 7.05513 7.24284
7.54919 7.67817 7.87467 8.06255 8.61195 9.17684 9.54142 10.05772
10.75672
Molecular weight = 337.22amu
Principal moments of inertia in cm(-1)
A = 0.029189 B = 0.001498 C = 0.001463
Principal moments of inertia in units of 10**(-40)*gram-cm**2
A = 959.033846 B =18681.359244 C =19131.725292
Net atomic charges, atomic populations, and dipole contributions
calculated with CM2
Atom NO. Type Charge No. of electrons
1 C -0.111 4.111
2 C -0.119 4.119
3 H 0.111 0.889
4 C -0.150 4.150
5 C -0.196 4.196
6 H 0.125 0.875
7 C 0.545 3.455
8 O -0.538 6.538
9 N -0.608 5.608
10 C 0.106 3.894
11 C -0.133 4.133
12 C -0.085 4.085
13 C -0.112 4.112
14 C 0.058 3.942
15 N -0.671 5.671
16 C 0.051 3.949
17 C 0.440 3.560
18 O -0.583 6.583
19 N -0.564 5.564
20 C -0.300 4.300
21 H 0.103 0.897
22 C 0.022 3.978
23 N -0.902 5.902
24 Si 0.930 3.070
25 H -0.278 1.278
26 H -0.284 1.284
27 H -0.269 1.269
28 C -0.129 4.129
29 C 0.112 3.888
30 H 0.067 0.933
31 H 0.049 0.951
32 H 0.063 0.937
33 H 0.099 0.901
34 H 0.104 0.896
35 H 0.070 0.930
36 H 0.087 0.913
37 H 0.070 0.930
38 H 0.081 0.919
39 H 0.071 0.929
40 H 0.073 0.927
41 H 0.063 0.937
42 H 0.024 0.976
43 H 0.071 0.929
44 H 0.348 0.652
45 H 0.042 0.958
46 H 0.085 0.915
47 H 0.392 0.608
48 H 0.271 0.729
49 H 0.068 0.932
50 H 0.076 0.924
51 H 0.091 0.909
52 H 0.066 0.934
For the charges calculated by CM2:
Dipole moment (debyes) X Y Z Total
from point charges -15.444 7.666 -23.844 29.425
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 -0.168 4.168
2 C -0.138 4.138
3 H 0.129 0.871
4 C -0.188 4.188
5 C -0.217 4.217
6 H 0.142 0.858
7 C 0.334 3.666
8 O -0.416 6.416
9 N -0.341 5.341
10 C -0.017 4.017
11 C -0.171 4.171
12 C -0.104 4.104
13 C -0.150 4.150
14 C -0.071 4.071
15 N -0.303 5.303
16 C -0.082 4.082
17 C 0.226 3.774
18 O -0.467 6.467
19 N -0.201 5.201
20 C -0.429 4.429
21 H 0.121 0.879
22 C -0.179 4.179
23 N -0.544 5.544
24 Si 0.757 3.243
25 H -0.204 1.204
26 H -0.209 1.209
27 H -0.194 1.194
28 C -0.167 4.167
29 C -0.011 4.011
30 H 0.086 0.914
31 H 0.067 0.933
32 H 0.082 0.918
33 H 0.117 0.883
34 H 0.122 0.878
35 H 0.088 0.912
36 H 0.105 0.895
37 H 0.089 0.911
38 H 0.099 0.901
39 H 0.090 0.910
40 H 0.091 0.909
41 H 0.082 0.918
42 H 0.042 0.958
43 H 0.089 0.911
44 H 0.167 0.833
45 H 0.060 0.940
46 H 0.103 0.897
47 H 0.225 0.775
48 H 0.081 0.919
49 H 0.087 0.913
50 H 0.095 0.905
51 H 0.110 0.890
52 H 0.084 0.916
Dipole moment (debyes) X Y Z Total
from point charges -16.312 8.471 -23.188 29.589
hybrid contribution 1.106 -1.260 0.315 1.706
sum -15.206 7.211 -22.873 28.397
Atomic orbital electron populations
1.21358 0.91451 1.01393 1.02615 1.22392 0.96650 0.93588 1.01148
0.87093 1.23077 1.03135 1.01952 0.90619 1.22334 1.02238 1.01312
0.95847 0.85753 1.19676 0.87905 0.80860 0.78159 1.90691 1.14566
1.74663 1.61671 1.48087 1.07262 1.27203 1.51554 1.21929 0.79526
1.02754 0.97490 1.22140 1.00875 0.99610 0.94516 1.21114 0.94476
0.98452 0.96332 1.21586 0.95513 1.02812 0.95079 1.22026 0.95904
0.99394 0.89775 1.60086 1.02887 1.56248 1.11073 1.21665 0.90460
0.99437 0.96607 1.19837 0.83684 0.84252 0.89645 1.90521 1.50416
1.54845 1.50958 1.41868 1.09254 1.60404 1.08563 1.19712 0.95938
1.43798 0.83489 0.87923 1.25258 0.95515 0.97198 0.99956 1.69611
1.04425 1.47299 1.33031 0.85854 0.77604 0.78697 0.82113 1.20431
1.20919 1.19401 1.21961 0.96076 1.02854 0.95791 1.21602 0.96283
0.91110 0.92056 0.91380 0.93253 0.91832 0.88300 0.87782 0.91174
0.89512 0.91139 0.90077 0.91018 0.90850 0.91838 0.95787 0.91095
0.83264 0.93996 0.89702 0.77471 0.91889 0.91324 0.90522 0.89037
0.91590
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 -0.11 -0.92 8.43 37.16 0.31 -0.61 16
2 C -0.12 -0.82 6.41 -90.61 -0.58 -1.40 16
3 H 0.11 0.59 8.14 -51.93 -0.42 0.17 16
4 C -0.15 -0.88 9.88 -26.73 -0.26 -1.15 16
5 C -0.20 -1.39 5.12 -91.77 -0.47 -1.86 16
6 H 0.12 0.68 6.58 -51.93 -0.34 0.34 16
7 C 0.55 5.27 7.46 -10.99 -0.08 5.19 16
8 O -0.54 -6.77 12.52 5.56 0.07 -6.70 16
9 N -0.61 -4.96 2.97 -172.53 -0.51 -5.47 16
10 C 0.11 0.65 6.37 -3.48 -0.02 0.62 16
11 C -0.13 -0.92 5.16 -26.39 -0.14 -1.06 16
12 C -0.08 -0.64 2.15 -90.58 -0.19 -0.83 16
13 C -0.11 -1.09 4.94 -26.73 -0.13 -1.22 16
14 C 0.06 0.67 5.44 -3.83 -0.02 0.65 16
15 N -0.67 -10.75 6.13 -115.05 -0.70 -11.45 16
16 C 0.05 0.90 6.17 -4.97 -0.03 0.87 16
17 C 0.44 10.46 7.82 -10.98 -0.09 10.38 16
18 O -0.58 -15.99 15.78 5.55 0.09 -15.91 16
19 N -0.56 -14.35 5.29 -10.97 -0.06 -14.41 16
20 C -0.30 -8.40 9.68 -14.94 -0.14 -8.55 16
21 H 0.10 3.02 7.16 -52.49 -0.38 2.64 16
22 C 0.02 0.60 5.50 -17.47 -0.10 0.50 16
23 N -0.90 -24.50 13.05 55.50 0.72 -23.78 16
24 Si 0.93 21.05 29.55 -169.99 -5.02 16.02 16
25 H -0.28 -6.21 7.11 56.52 0.40 -5.81 16
26 H -0.28 -6.27 7.11 56.52 0.40 -5.87 16
27 H -0.27 -6.10 7.11 56.52 0.40 -5.70 16
28 C -0.13 -0.98 5.36 -26.63 -0.14 -1.12 16
29 C 0.11 0.89 6.43 -3.73 -0.02 0.87 16
30 H 0.07 0.68 7.26 -51.93 -0.38 0.30 16
31 H 0.05 0.33 8.14 -51.93 -0.42 -0.09 16
32 H 0.06 0.61 7.01 -51.93 -0.36 0.24 16
33 H 0.10 0.65 8.05 -51.93 -0.42 0.23 16
34 H 0.10 0.42 8.14 -51.93 -0.42 0.00 16
35 H 0.07 0.38 8.14 -51.93 -0.42 -0.04 16
36 H 0.09 0.42 5.51 -51.93 -0.29 0.13 16
37 H 0.07 0.56 8.14 -51.93 -0.42 0.14 16
38 H 0.08 0.53 6.50 -51.93 -0.34 0.20 16
39 H 0.07 0.52 8.14 -51.93 -0.42 0.10 16
40 H 0.07 0.81 8.14 -51.93 -0.42 0.39 16
41 H 0.06 0.63 8.14 -51.93 -0.42 0.20 16
42 H 0.02 0.26 8.14 -51.93 -0.42 -0.16 16
43 H 0.07 0.77 6.53 -51.93 -0.34 0.43 16
44 H 0.35 5.79 8.43 -39.29 -0.33 5.45 16
45 H 0.04 0.67 8.14 -51.93 -0.42 0.24 16
46 H 0.08 1.38 8.14 -51.93 -0.42 0.95 16
47 H 0.39 9.49 7.90 -40.82 -0.32 9.17 16
48 H 0.27 6.96 8.31 -40.82 -0.34 6.62 16
49 H 0.07 0.60 8.14 -51.93 -0.42 0.18 16
50 H 0.08 0.53 8.14 -51.93 -0.42 0.11 16
51 H 0.09 0.85 7.00 -51.93 -0.36 0.49 16
52 H 0.07 0.46 8.14 -51.93 -0.42 0.04 16
LS Contribution 409.15 15.07 6.17 6.17
Total: -1.00 -32.88 409.15 -10.27 -43.15
By element:
Atomic # 1 Polarization: 20.01 SS G_CDS: -8.91 Total: 11.10 kcal
Atomic # 6 Polarization: 3.39 SS G_CDS: -2.11 Total: 1.28 kcal
Atomic # 7 Polarization: -54.56 SS G_CDS: -0.55 Total: -55.11 kcal
Atomic # 8 Polarization: -22.77 SS G_CDS: 0.16 Total: -22.61 kcal
Atomic # 14 Polarization: 21.05 SS G_CDS: -5.02 Total: 16.02 kcal
Total LS contribution 6.17 Total: 6.17 kcal
Total: -32.88 -10.27 -43.15 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.
ZINC001495395035.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 -16.412 kcal
(2) G-P(sol) polarization free energy of solvation -32.878 kcal
(3) G-ENP(sol) elect.-nuc.-pol. free energy of system -49.291 kcal
(4) G-CDS(sol) cavity-dispersion-solvent structure free energy -10.275 kcal
(5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -43.153 kcal
(6) G-S(sol) free energy of system = (1) + (5) -59.565 kcal
1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED
Total computer time = 0.83 seconds