Wall clock time and date at job start Sat Apr 11 2020 06:28:53
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 N 1.46508 * 1
3 3 C 1.46498 * 119.99472 * 2 1
4 4 C 1.34778 * 120.00053 * 179.97438 * 2 1 3
5 5 O 1.21271 * 119.99891 * 4.91181 * 4 2 1
6 6 C 1.50703 * 119.99475 * 184.90654 * 4 2 1
7 7 C 1.53000 * 109.46777 * 189.74839 * 6 4 2
8 8 C 1.53001 * 109.47229 * 180.02562 * 7 6 4
9 9 C 1.52996 * 109.47330 * 59.99458 * 8 7 6
10 10 C 1.50708 * 109.46969 * 60.00208 * 9 8 7
11 11 O 1.21273 * 119.99740 * 0.02562 * 10 9 8
12 12 N 1.34777 * 119.99734 * 179.72665 * 10 9 8
13 13 C 1.46497 * 119.99500 * 180.02562 * 12 10 9
14 14 C 1.52999 * 109.46909 * 179.97438 * 13 12 10
15 15 H 1.09000 * 109.47784 * 304.99896 * 14 13 12
16 16 O 1.42904 * 109.47230 * 65.00224 * 14 13 12
17 17 C 1.53001 * 109.47158 * 184.99630 * 14 13 12
18 18 N 1.46502 * 109.47146 * 179.97438 * 17 14 13
19 19 C 1.36934 * 120.00277 * 179.97438 * 18 17 14
20 20 H 1.08003 * 120.00014 * 0.02562 * 19 18 17
21 21 C 1.38817 * 120.00431 * 180.02562 * 19 18 17
22 22 N 1.31623 * 119.99555 * 0.02562 * 21 19 18
23 23 Si 1.86800 * 120.00019 * 180.02562 * 21 19 18
24 24 H 1.48499 * 109.47038 * 0.02562 * 23 21 19
25 25 H 1.48501 * 109.46652 * 120.00273 * 23 21 19
26 26 H 1.48497 * 109.46758 * 240.00177 * 23 21 19
27 27 C 1.53000 * 109.47407 * 300.00433 * 9 8 7
28 28 C 1.52996 * 109.47352 * 69.74561 * 6 4 2
29 29 H 1.09005 * 109.46289 * 180.02562 * 1 2 3
30 30 H 1.08994 * 109.47470 * 300.00842 * 1 2 3
31 31 H 1.09002 * 109.46630 * 60.00986 * 1 2 3
32 32 H 1.09007 * 109.46799 * 263.30662 * 3 2 1
33 33 H 1.09000 * 109.47677 * 23.30414 * 3 2 1
34 34 H 1.08995 * 109.47407 * 143.31217 * 3 2 1
35 35 H 1.09003 * 109.47005 * 309.74304 * 6 4 2
36 36 H 1.08997 * 109.47433 * 59.99500 * 7 6 4
37 37 H 1.09005 * 109.47254 * 299.99932 * 7 6 4
38 38 H 1.09003 * 109.46574 * 299.99478 * 8 7 6
39 39 H 1.09004 * 109.47210 * 180.02562 * 8 7 6
40 40 H 1.08994 * 109.47382 * 180.02562 * 9 8 7
41 41 H 0.97002 * 120.00070 * 359.97438 * 12 10 9
42 42 H 1.08996 * 109.47629 * 299.99608 * 13 12 10
43 43 H 1.09002 * 109.47666 * 59.99884 * 13 12 10
44 44 H 0.96703 * 114.00107 * 59.99261 * 16 14 13
45 45 H 1.08993 * 109.47682 * 300.00231 * 17 14 13
46 46 H 1.08998 * 109.47034 * 60.00739 * 17 14 13
47 47 H 0.96999 * 119.99829 * 0.02562 * 18 17 14
48 48 H 0.96996 * 119.99626 * 179.97438 * 22 21 19
49 49 H 1.09001 * 109.47337 * 179.97438 * 27 9 8
50 50 H 1.09003 * 109.46916 * 300.00236 * 27 9 8
51 51 H 1.08997 * 109.47145 * 300.00113 * 28 6 4
52 52 H 1.09005 * 109.46769 * 60.00012 * 28 6 4
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 7 1.4651 0.0000 0.0000
3 6 2.1975 1.2688 0.0000
4 6 2.1390 -1.1672 0.0005
5 8 1.5360 -2.2155 -0.0889
6 6 3.6419 -1.1694 0.1122
7 6 4.1709 -2.5802 -0.1536
8 6 5.6966 -2.5827 -0.0396
9 6 6.1037 -2.1420 1.3678
10 6 5.5228 -3.0953 2.3803
11 8 4.8500 -4.0348 2.0123
12 7 5.7561 -2.9070 3.6943
13 6 5.1919 -3.8340 4.6785
14 6 5.6051 -3.3976 6.0855
15 1 6.6909 -3.3171 6.1369
16 8 5.0188 -2.1285 6.3820
17 6 5.1217 -4.4328 7.1031
18 7 5.5178 -4.0152 8.4503
19 6 5.1917 -4.7903 9.5311
20 1 4.6429 -5.7097 9.3903
21 6 5.5666 -4.3943 10.8077
22 7 6.2351 -3.2735 10.9793
23 14 5.1224 -5.4521 12.2818
24 1 4.3764 -6.6516 11.8236
25 1 6.3634 -5.8775 12.9777
26 1 4.2748 -4.6684 13.2159
27 6 5.5747 -0.7312 1.6335
28 6 4.0494 -0.7285 1.5194
29 1 -0.3632 -1.0278 0.0005
30 1 -0.3634 0.5139 0.8898
31 1 -0.3633 0.5137 -0.8901
32 1 2.4828 1.5235 -1.0207
33 1 1.5618 2.0554 0.4065
34 1 3.0928 1.1715 0.6139
35 1 4.0616 -0.4800 -0.6205
36 1 3.8805 -2.8943 -1.1561
37 1 3.7511 -3.2697 0.5790
38 1 6.1167 -1.8932 -0.7720
39 1 6.0735 -3.5877 -0.2294
40 1 7.1906 -2.1434 1.4488
41 1 6.2982 -2.1583 3.9883
42 1 4.1048 -3.8291 4.6008
43 1 5.5654 -4.8399 4.4862
44 1 4.0521 -2.1258 6.3546
45 1 4.0359 -4.5133 7.0519
46 1 5.5689 -5.4007 6.8771
47 1 6.0104 -3.1892 8.5768
48 1 6.4967 -2.9967 11.8714
49 1 5.8643 -0.4174 2.6364
50 1 5.9948 -0.0417 0.9012
51 1 3.6725 0.2766 1.7087
52 1 3.6297 -1.4179 2.2519
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
ZINC001497090139.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 06:28:53
Heat of formation + Delta-G solvation = -119.643836 kcal
Electronic energy + Delta-G solvation = -30849.720427 eV
Core-core repulsion = 26656.144111 eV
Total energy + Delta-G solvation = -4193.576316 eV
No. of doubly occupied orbitals = 66
Molecular weight
(most abundant/longest-lived isotopes) = 341.215 amu
Computer time = 0.95 seconds
Orbital eigenvalues (eV)
-41.10582 -39.86544 -37.92641 -36.86976 -35.87767 -34.44787 -34.00269 -32.04415
-31.32520 -30.97921 -29.04240 -28.32778 -26.71953 -25.54840 -23.81696 -23.01072
-22.57664 -21.48332 -21.34430 -19.59899 -19.39065 -17.35609 -17.17939 -16.94607
-16.60857 -16.38701 -16.13760 -15.95602 -15.64834 -15.04429 -14.57716 -14.44268
-14.31050 -14.25868 -13.90942 -13.59829 -13.37446 -13.11253 -13.00739 -12.97291
-12.88048 -12.67267 -12.48992 -12.46322 -12.27378 -12.22683 -12.11064 -11.85964
-11.46598 -11.03286 -10.96596 -10.85328 -10.84445 -10.61980 -10.42848 -10.14654
-9.87037 -9.85136 -9.71430 -9.40583 -9.03459 -9.01852 -8.91435 -6.94856
-5.77433 -3.06936 2.36333 2.62341 2.68763 3.13605 3.42708 3.48477
3.50695 4.09898 4.26830 4.33370 4.53618 4.57943 4.64647 4.70960
4.72110 4.79046 4.86079 4.87717 4.98875 5.04334 5.05595 5.12203
5.17730 5.19156 5.23413 5.26799 5.42771 5.50617 5.53349 5.54884
5.61207 5.66326 5.71124 5.81488 5.85157 5.94848 5.96310 6.01315
6.10970 6.19116 6.34704 6.50431 6.56976 6.67190 6.99810 7.49544
7.68279 7.91139 7.92503 8.24137 8.40915 9.52697 10.09201 10.45232
11.45004
Molecular weight = 341.21amu
Principal moments of inertia in cm(-1)
A = 0.016029 B = 0.002108 C = 0.002005
Principal moments of inertia in units of 10**(-40)*gram-cm**2
A = 1746.434829 B =13276.743390 C =13960.851803
Net atomic charges, atomic populations, and dipole contributions
calculated with CM2
Atom NO. Type Charge No. of electrons
1 C 0.078 3.922
2 N -0.626 5.626
3 C 0.069 3.931
4 C 0.517 3.483
5 O -0.532 6.532
6 C -0.102 4.102
7 C -0.114 4.114
8 C -0.096 4.096
9 C -0.111 4.111
10 C 0.514 3.486
11 O -0.534 6.534
12 N -0.722 5.722
13 C 0.090 3.910
14 C 0.090 3.910
15 H 0.104 0.896
16 O -0.552 6.552
17 C 0.126 3.874
18 N -0.726 5.726
19 C -0.242 4.242
20 H 0.070 0.930
21 C -0.013 4.013
22 N -0.930 5.930
23 Si 0.908 3.092
24 H -0.280 1.280
25 H -0.291 1.291
26 H -0.291 1.291
27 C -0.108 4.108
28 C -0.118 4.118
29 H 0.086 0.914
30 H 0.059 0.941
31 H 0.057 0.943
32 H 0.056 0.944
33 H 0.073 0.927
34 H 0.081 0.919
35 H 0.091 0.909
36 H 0.063 0.937
37 H 0.104 0.896
38 H 0.067 0.933
39 H 0.073 0.927
40 H 0.099 0.901
41 H 0.403 0.597
42 H 0.070 0.930
43 H 0.076 0.924
44 H 0.373 0.627
45 H 0.023 0.977
46 H 0.028 0.972
47 H 0.389 0.611
48 H 0.255 0.745
49 H 0.076 0.924
50 H 0.077 0.923
51 H 0.076 0.924
52 H 0.071 0.929
For the charges calculated by CM2:
Dipole moment (debyes) X Y Z Total
from point charges -3.018 12.473 -27.413 30.268
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 -0.064 4.064
2 N -0.361 5.361
3 C -0.074 4.074
4 C 0.305 3.695
5 O -0.408 6.408
6 C -0.124 4.124
7 C -0.152 4.152
8 C -0.134 4.134
9 C -0.132 4.132
10 C 0.300 3.700
11 O -0.411 6.411
12 N -0.374 5.374
13 C -0.035 4.035
14 C 0.030 3.970
15 H 0.121 0.879
16 O -0.357 6.357
17 C -0.003 4.003
18 N -0.371 5.371
19 C -0.373 4.373
20 H 0.088 0.912
21 C -0.209 4.209
22 N -0.578 5.578
23 Si 0.739 3.261
24 H -0.205 1.205
25 H -0.218 1.218
26 H -0.218 1.218
27 C -0.146 4.146
28 C -0.155 4.155
29 H 0.105 0.895
30 H 0.078 0.922
31 H 0.076 0.924
32 H 0.074 0.926
33 H 0.092 0.908
34 H 0.099 0.901
35 H 0.109 0.891
36 H 0.081 0.919
37 H 0.122 0.878
38 H 0.085 0.915
39 H 0.092 0.908
40 H 0.117 0.883
41 H 0.238 0.762
42 H 0.088 0.912
43 H 0.095 0.905
44 H 0.220 0.780
45 H 0.040 0.960
46 H 0.046 0.954
47 H 0.223 0.777
48 H 0.065 0.935
49 H 0.094 0.906
50 H 0.096 0.904
51 H 0.094 0.906
52 H 0.089 0.911
Dipole moment (debyes) X Y Z Total
from point charges -3.289 11.256 -27.551 29.943
hybrid contribution -0.414 0.056 1.029 1.111
sum -3.703 11.312 -26.522 29.070
Atomic orbital electron populations
1.21686 0.79408 1.04251 1.01090 1.47748 1.07067 1.06495 1.74773
1.22032 0.97963 0.85325 1.02115 1.20833 0.90331 0.83013 0.75293
1.90704 1.70275 1.31181 1.48611 1.21354 0.91142 1.00763 0.99111
1.21636 0.94790 0.94913 1.03856 1.21329 0.96324 1.01952 0.93782
1.21404 1.01501 0.94941 0.95362 1.20582 0.80484 0.85892 0.83032
1.90662 1.38930 1.31798 1.79676 1.45973 1.54184 1.31335 1.05874
1.22086 0.99206 0.93802 0.88392 1.22376 0.98954 0.84897 0.90769
0.87870 1.86564 1.24895 1.31081 1.93171 1.21197 0.97337 0.95063
0.86665 1.42237 1.67803 1.27315 0.99709 1.19269 1.29642 1.02665
0.85764 0.91169 1.24765 1.01001 0.97665 0.97509 1.69690 1.43692
1.23008 1.21450 0.86107 0.77558 0.79425 0.83041 1.20539 1.21825
1.21817 1.21526 0.95080 0.95032 1.02945 1.21680 0.96364 1.02056
0.95402 0.89549 0.92232 0.92435 0.92565 0.90771 0.90074 0.89092
0.91868 0.87808 0.91474 0.90848 0.88315 0.76222 0.91206 0.90533
0.77989 0.95963 0.95390 0.77665 0.93539 0.90578 0.90419 0.90561
0.91058
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 0.08 0.59 10.65 59.85 0.64 1.22 16
2 N -0.63 -5.22 3.27 -189.51 -0.62 -5.84 16
3 C 0.07 0.31 9.89 59.85 0.59 0.91 16
4 C 0.52 5.80 6.94 -10.98 -0.08 5.72 16
5 O -0.53 -8.30 15.32 5.57 0.09 -8.22 16
6 C -0.10 -0.88 1.71 -91.77 -0.16 -1.04 16
7 C -0.11 -1.23 4.26 -26.73 -0.11 -1.34 16
8 C -0.10 -0.81 5.09 -26.73 -0.14 -0.94 16
9 C -0.11 -0.88 3.01 -91.77 -0.28 -1.16 16
10 C 0.51 6.02 5.64 -10.98 -0.06 5.95 16
11 O -0.53 -8.37 13.66 5.56 0.08 -8.29 16
12 N -0.72 -7.95 5.40 -60.30 -0.33 -8.27 16
13 C 0.09 1.17 5.31 -4.04 -0.02 1.15 16
14 C 0.09 1.36 3.09 -26.73 -0.08 1.27 16
15 H 0.10 1.59 8.14 -51.93 -0.42 1.17 16
16 O -0.55 -8.54 13.03 -35.23 -0.46 -9.00 16
17 C 0.13 2.45 5.92 -4.04 -0.02 2.42 16
18 N -0.73 -18.35 5.49 -59.91 -0.33 -18.68 16
19 C -0.24 -6.83 9.99 -15.06 -0.15 -6.98 16
20 H 0.07 1.93 7.83 -52.48 -0.41 1.51 16
21 C -0.01 -0.38 5.50 -17.43 -0.10 -0.48 16
22 N -0.93 -28.33 13.06 55.49 0.72 -27.61 16
23 Si 0.91 22.52 29.55 -169.99 -5.02 17.50 16
24 H -0.28 -6.74 7.11 56.52 0.40 -6.34 16
25 H -0.29 -7.24 7.11 56.52 0.40 -6.84 16
26 H -0.29 -7.24 7.11 56.52 0.40 -6.84 16
27 C -0.11 -0.66 5.36 -26.76 -0.14 -0.80 16
28 C -0.12 -0.91 4.68 -26.76 -0.13 -1.04 16
29 H 0.09 0.83 6.91 -51.93 -0.36 0.47 16
30 H 0.06 0.36 8.14 -51.93 -0.42 -0.06 16
31 H 0.06 0.33 8.14 -51.93 -0.42 -0.09 16
32 H 0.06 0.20 8.14 -51.92 -0.42 -0.22 16
33 H 0.07 0.24 8.02 -51.93 -0.42 -0.18 16
34 H 0.08 0.31 4.36 -51.93 -0.23 0.09 16
35 H 0.09 0.56 7.68 -51.93 -0.40 0.16 16
36 H 0.06 0.70 8.14 -51.93 -0.42 0.27 16
37 H 0.10 1.53 5.36 -51.93 -0.28 1.25 16
38 H 0.07 0.41 8.14 -51.93 -0.42 -0.02 16
39 H 0.07 0.69 8.10 -51.93 -0.42 0.27 16
40 H 0.10 0.61 8.14 -51.93 -0.42 0.19 16
41 H 0.40 3.76 7.91 -40.82 -0.32 3.44 16
42 H 0.07 0.95 8.14 -51.93 -0.42 0.53 16
43 H 0.08 1.05 8.14 -51.93 -0.42 0.63 16
44 H 0.37 4.93 9.05 45.56 0.41 5.35 16
45 H 0.02 0.44 8.14 -51.93 -0.42 0.01 16
46 H 0.03 0.55 8.14 -51.93 -0.42 0.13 16
47 H 0.39 10.49 7.54 -40.82 -0.31 10.18 16
48 H 0.25 7.47 8.31 -40.82 -0.34 7.13 16
49 H 0.08 0.44 7.58 -51.93 -0.39 0.04 16
50 H 0.08 0.32 8.14 -51.93 -0.42 -0.10 16
51 H 0.08 0.46 5.44 -51.93 -0.28 0.18 16
52 H 0.07 0.77 7.22 -51.93 -0.37 0.40 16
LS Contribution 406.14 15.07 6.12 6.12
Total: -1.00 -36.74 406.14 -7.97 -44.71
By element:
Atomic # 1 Polarization: 20.70 SS G_CDS: -7.99 Total: 12.71 kcal
Atomic # 6 Polarization: 5.11 SS G_CDS: -0.23 Total: 4.87 kcal
Atomic # 7 Polarization: -59.85 SS G_CDS: -0.55 Total: -60.40 kcal
Atomic # 8 Polarization: -25.21 SS G_CDS: -0.30 Total: -25.51 kcal
Atomic # 14 Polarization: 22.52 SS G_CDS: -5.02 Total: 17.50 kcal
Total LS contribution 6.12 Total: 6.12 kcal
Total: -36.74 -7.97 -44.71 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.
ZINC001497090139.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 -74.929 kcal
(2) G-P(sol) polarization free energy of solvation -36.740 kcal
(3) G-ENP(sol) elect.-nuc.-pol. free energy of system -111.669 kcal
(4) G-CDS(sol) cavity-dispersion-solvent structure free energy -7.974 kcal
(5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -44.715 kcal
(6) G-S(sol) free energy of system = (1) + (5) -119.644 kcal
1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED
Total computer time = 0.95 seconds