Wall clock time and date at job start Sat Apr 11 2020 06:11:19 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 1.52994 * 1 3 3 O 1.42907 * 109.47206 * 2 1 4 4 C 1.42894 * 114.00033 * 179.97438 * 3 2 1 5 5 H 1.08997 * 109.47538 * 30.00085 * 4 3 2 6 6 C 1.50700 * 109.47187 * 269.99586 * 4 3 2 7 7 O 1.21285 * 119.99894 * 355.28291 * 6 4 3 8 8 N 1.34774 * 120.00096 * 174.99794 * 6 4 3 9 9 C 1.46508 * 119.99927 * 179.97438 * 8 6 4 10 10 C 1.53001 * 109.45676 * 60.03582 * 9 8 6 11 11 C 1.53039 * 109.46088 * 300.07249 * 9 8 6 12 12 C 1.53189 * 109.31554 * 301.34250 * 11 9 8 13 13 N 1.46927 * 108.77655 * 305.36919 * 12 11 9 14 14 C 1.36933 * 120.63011 * 233.58995 * 13 12 11 15 15 H 1.07997 * 120.00162 * 27.68182 * 14 13 12 16 16 C 1.38813 * 119.99990 * 207.68991 * 14 13 12 17 17 N 1.31626 * 119.99883 * 17.36413 * 16 14 13 18 18 Si 1.86802 * 120.00159 * 197.36294 * 16 14 13 19 19 H 1.48493 * 109.46943 * 359.97438 * 18 16 14 20 20 H 1.48499 * 109.46984 * 119.99989 * 18 16 14 21 21 H 1.48501 * 109.47240 * 240.00004 * 18 16 14 22 22 C 1.46924 * 118.73947 * 53.60330 * 13 12 11 23 23 C 1.53046 * 109.45722 * 180.02562 * 9 8 6 24 24 C 1.53002 * 109.47160 * 149.99868 * 4 3 2 25 25 H 1.08998 * 110.75314 * 182.01182 * 24 4 3 26 26 C 1.55297 * 110.84647 * 305.71548 * 24 4 3 27 27 C 1.54950 * 100.94232 * 152.32056 * 26 24 4 28 28 O 1.43641 * 105.13606 * 323.55408 * 27 26 24 29 29 C 1.43239 * 109.97278 * 24.42679 * 28 27 26 30 30 H 1.09001 * 109.47119 * 60.00438 * 1 2 3 31 31 H 1.09005 * 109.47219 * 179.97438 * 1 2 3 32 32 H 1.09001 * 109.47289 * 299.99873 * 1 2 3 33 33 H 1.08994 * 109.47351 * 239.99767 * 2 1 3 34 34 H 1.09001 * 109.47119 * 119.99562 * 2 1 3 35 35 H 0.97002 * 120.00367 * 0.02562 * 8 6 4 36 36 H 1.08998 * 109.47325 * 59.99762 * 10 9 8 37 37 H 1.08999 * 109.46829 * 179.97438 * 10 9 8 38 38 H 1.09008 * 109.46804 * 299.99294 * 10 9 8 39 39 H 1.09000 * 109.49829 * 61.30046 * 11 9 8 40 40 H 1.09001 * 109.49379 * 181.39011 * 11 9 8 41 41 H 1.08998 * 109.58611 * 185.58066 * 12 11 9 42 42 H 1.08998 * 109.69983 * 65.22124 * 12 11 9 43 43 H 0.96994 * 119.99704 * 180.02562 * 17 16 14 44 44 H 1.08998 * 109.58833 * 186.60560 * 22 13 12 45 45 H 1.09002 * 109.70553 * 66.25223 * 22 13 12 46 46 H 1.08994 * 109.49122 * 178.61150 * 23 9 8 47 47 H 1.08998 * 109.49463 * 298.70221 * 23 9 8 48 48 H 1.09005 * 111.12534 * 270.23618 * 26 24 4 49 49 H 1.09002 * 111.13056 * 34.40202 * 26 24 4 50 50 H 1.09000 * 110.30929 * 204.63415 * 27 26 24 51 51 H 1.09002 * 110.30982 * 82.47227 * 27 26 24 52 52 H 1.08997 * 109.83149 * 238.77623 * 29 28 27 53 53 H 1.08999 * 109.90841 * 117.84430 * 29 28 27 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 1.5299 0.0000 0.0000 3 8 2.0063 1.3473 0.0000 4 6 3.4308 1.4601 0.0006 5 1 3.8635 0.6016 -0.5129 6 6 3.9310 1.5001 1.4216 7 8 3.1414 1.5245 2.3419 8 7 5.2556 1.5030 1.6699 9 6 5.7418 1.5424 3.0514 10 6 5.2270 0.3163 3.8081 11 6 5.2332 2.8138 3.7349 12 6 5.7219 4.0384 2.9550 13 7 7.1838 3.9655 2.8275 14 6 7.9718 5.0127 3.2240 15 1 7.6334 5.6778 4.0047 16 6 9.2056 5.2196 2.6225 17 7 9.4787 4.6495 1.4680 18 14 10.4784 6.3069 3.4515 19 1 9.9292 6.8251 4.7302 20 1 11.7045 5.5146 3.7238 21 1 10.8130 7.4459 2.5593 22 6 7.7840 2.7476 2.2660 23 6 7.2723 1.5380 3.0535 24 6 3.8409 2.7456 -0.7207 25 1 4.9264 2.8350 -0.7636 26 6 3.2204 2.8032 -2.1432 27 6 3.1255 4.3344 -2.3610 28 8 2.7882 4.8760 -1.0741 29 6 3.2144 3.9815 -0.0397 30 1 -0.3633 0.5138 -0.8900 31 1 -0.3634 -1.0277 -0.0005 32 1 -0.3634 0.5138 0.8900 33 1 1.8933 -0.5138 -0.8899 34 1 1.8933 -0.5138 0.8900 35 1 5.8871 1.4797 0.9340 36 1 5.5886 -0.5894 3.3212 37 1 5.5891 0.3452 4.8358 38 1 4.1370 0.3195 3.8062 39 1 4.1434 2.8055 3.7538 40 1 5.6149 2.8559 4.7550 41 1 5.4467 4.9467 3.4912 42 1 5.2686 4.0477 1.9638 43 1 10.3410 4.7938 1.0478 44 1 8.8694 2.8042 2.3475 45 1 7.5010 2.6478 1.2181 46 1 7.6347 1.5922 4.0800 47 1 7.6340 0.6214 2.5874 48 1 3.8800 2.3420 -2.8784 49 1 2.2329 2.3421 -2.1601 50 1 2.3447 4.5658 -3.0855 51 1 4.0842 4.7287 -2.6980 52 1 2.3581 3.6776 0.5623 53 1 3.9555 4.4709 0.5922 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 ZINC001270243679.mol2 53 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 06:11:19 Heat of formation + Delta-G solvation = -108.650436 kcal Electronic energy + Delta-G solvation = -33161.547255 eV Core-core repulsion = 29033.873560 eV Total energy + Delta-G solvation = -4127.673695 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.220 amu Computer time = 1.02 seconds Orbital eigenvalues (eV) -40.65641 -39.21388 -38.03924 -36.82534 -34.39890 -33.46117 -31.88960 -31.02399 -30.86013 -29.94727 -29.34869 -27.43877 -26.37095 -24.10263 -23.01276 -22.69696 -22.32229 -21.50696 -20.90971 -20.08564 -18.66982 -17.61918 -17.06976 -16.78472 -16.44404 -15.93852 -15.28525 -14.93058 -14.79418 -14.71871 -14.35767 -14.12341 -13.84041 -13.69393 -13.43072 -13.29602 -13.14426 -13.07646 -12.87130 -12.43982 -12.39444 -12.02465 -11.87932 -11.71403 -11.64351 -11.49778 -11.37312 -11.26208 -11.19335 -10.96436 -10.85499 -10.79124 -10.73910 -10.39972 -10.32475 -10.22873 -9.88505 -9.67988 -9.56807 -9.31919 -8.88447 -8.65016 -8.47633 -6.67996 -5.81731 -3.22140 2.77586 3.19420 3.35787 3.44401 3.46817 3.63036 3.96215 4.30358 4.48883 4.59874 4.76886 4.84905 4.94725 5.05454 5.13763 5.20788 5.25162 5.28137 5.30657 5.35167 5.37385 5.43651 5.50791 5.55369 5.60116 5.67051 5.72526 5.78586 5.94967 5.96387 5.96870 6.00585 6.05377 6.18279 6.22173 6.28197 6.32634 6.39209 6.50573 6.65536 6.68776 6.83254 6.93721 6.96558 7.06596 7.12156 7.26527 7.54904 7.78351 7.85661 8.42786 8.49527 9.19722 9.83139 10.39714 11.26927 Molecular weight = 340.22amu Principal moments of inertia in cm(-1) A = 0.013158 B = 0.003938 C = 0.003303 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 2127.480597 B = 7108.073192 C = 8475.048689 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.148 4.148 2 C 0.056 3.944 3 O -0.350 6.350 4 C 0.085 3.915 5 H 0.085 0.915 6 C 0.492 3.508 7 O -0.524 6.524 8 N -0.707 5.707 9 C 0.184 3.816 10 C -0.160 4.160 11 C -0.143 4.143 12 C 0.150 3.850 13 N -0.590 5.590 14 C -0.248 4.248 15 H 0.065 0.935 16 C 0.002 3.998 17 N -0.904 5.904 18 Si 0.900 3.100 19 H -0.278 1.278 20 H -0.290 1.290 21 H -0.291 1.291 22 C 0.173 3.827 23 C -0.146 4.146 24 C -0.116 4.116 25 H 0.104 0.896 26 C -0.147 4.147 27 C 0.052 3.948 28 O -0.382 6.382 29 C 0.059 3.941 30 H 0.061 0.939 31 H 0.068 0.932 32 H 0.066 0.934 33 H 0.046 0.954 34 H 0.051 0.949 35 H 0.398 0.602 36 H 0.046 0.954 37 H 0.058 0.942 38 H 0.071 0.929 39 H 0.073 0.927 40 H 0.062 0.938 41 H 0.050 0.950 42 H 0.017 0.983 43 H 0.252 0.748 44 H 0.089 0.911 45 H 0.014 0.986 46 H 0.071 0.929 47 H 0.053 0.947 48 H 0.081 0.919 49 H 0.088 0.912 50 H 0.082 0.918 51 H 0.060 0.940 52 H 0.081 0.919 53 H 0.075 0.925 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -12.130 -11.684 -6.792 18.160 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 -0.205 4.205 2 C -0.020 4.020 3 O -0.268 6.268 4 C 0.023 3.977 5 H 0.103 0.897 6 C 0.277 3.723 7 O -0.400 6.400 8 N -0.360 5.360 9 C 0.099 3.901 10 C -0.218 4.218 11 C -0.183 4.183 12 C 0.023 3.977 13 N -0.312 5.312 14 C -0.378 4.378 15 H 0.083 0.917 16 C -0.196 4.196 17 N -0.549 5.549 18 Si 0.730 3.270 19 H -0.203 1.203 20 H -0.216 1.216 21 H -0.218 1.218 22 C 0.047 3.953 23 C -0.186 4.186 24 C -0.135 4.135 25 H 0.123 0.877 26 C -0.184 4.184 27 C -0.024 4.024 28 O -0.302 6.302 29 C -0.017 4.017 30 H 0.080 0.920 31 H 0.087 0.913 32 H 0.085 0.915 33 H 0.064 0.936 34 H 0.069 0.931 35 H 0.233 0.767 36 H 0.065 0.935 37 H 0.077 0.923 38 H 0.090 0.910 39 H 0.091 0.909 40 H 0.081 0.919 41 H 0.068 0.932 42 H 0.035 0.965 43 H 0.062 0.938 44 H 0.107 0.893 45 H 0.032 0.968 46 H 0.090 0.910 47 H 0.071 0.929 48 H 0.100 0.900 49 H 0.107 0.893 50 H 0.100 0.900 51 H 0.079 0.921 52 H 0.099 0.901 53 H 0.093 0.907 Dipole moment (debyes) X Y Z Total from point charges -12.794 -11.273 -6.166 18.133 hybrid contribution 1.511 0.010 -0.021 1.512 sum -11.282 -11.264 -6.187 17.101 Atomic orbital electron populations 1.21696 0.93533 1.02029 1.03256 1.22546 0.95872 0.83697 0.99904 1.87994 1.17988 1.26386 1.94387 1.21819 0.83647 0.99058 0.93151 0.89720 1.21035 0.82909 0.76897 0.91494 1.90634 1.55290 1.48646 1.45438 1.46214 1.06359 1.74069 1.09380 1.20277 0.94455 0.95047 0.80282 1.22219 1.02869 0.96823 0.99871 1.22390 1.01012 0.95357 0.99508 1.20880 0.85630 0.94858 0.96287 1.44036 0.99562 1.13945 1.73707 1.19246 0.98849 1.06254 1.13423 0.91693 1.24992 0.99989 0.99256 0.95389 1.70024 1.22534 1.47530 1.14828 0.86251 0.81717 0.79940 0.79066 1.20284 1.21635 1.21783 1.20712 0.99634 0.82571 0.92405 1.22521 0.92531 1.00562 1.02942 1.22857 1.01582 0.93707 0.95357 0.87747 1.23270 1.02471 0.97395 0.95305 1.23320 1.00513 0.91996 0.86595 1.88394 1.81891 1.45407 1.14461 1.23210 0.99670 0.88405 0.90463 0.91990 0.91285 0.91531 0.93612 0.93068 0.76677 0.93484 0.92251 0.90984 0.90897 0.91892 0.93170 0.96527 0.93801 0.89270 0.96779 0.91031 0.92854 0.90002 0.89348 0.90012 0.92137 0.90085 0.90676 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 18. 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 -0.15 -1.32 10.28 37.15 0.38 -0.93 16 2 C 0.06 0.58 6.46 37.15 0.24 0.82 16 3 O -0.35 -4.50 7.66 -55.10 -0.42 -4.93 16 4 C 0.09 1.04 2.34 -27.88 -0.07 0.97 16 5 H 0.09 0.82 7.79 -51.93 -0.40 0.41 16 6 C 0.49 7.32 5.92 -10.99 -0.07 7.25 16 7 O -0.52 -9.32 12.72 -14.31 -0.18 -9.50 16 8 N -0.71 -10.44 4.07 -47.56 -0.19 -10.63 16 9 C 0.18 3.01 0.66 -131.77 -0.09 2.92 16 10 C -0.16 -2.36 8.40 37.16 0.31 -2.04 16 11 C -0.14 -2.64 4.67 -26.61 -0.12 -2.77 16 12 C 0.15 3.18 6.25 -3.71 -0.02 3.15 16 13 N -0.59 -14.15 2.99 -172.36 -0.52 -14.67 16 14 C -0.25 -6.68 9.59 -15.06 -0.14 -6.82 16 15 H 0.07 1.76 7.89 -52.49 -0.41 1.34 16 16 C 0.00 0.05 4.91 -17.43 -0.09 -0.04 16 17 N -0.90 -25.22 11.19 55.49 0.62 -24.59 16 18 Si 0.90 21.44 29.59 -169.99 -5.03 16.41 16 19 H -0.28 -6.53 7.11 56.52 0.40 -6.13 16 20 H -0.29 -6.90 7.11 56.52 0.40 -6.50 16 21 H -0.29 -7.02 7.11 56.52 0.40 -6.62 16 22 C 0.17 3.77 5.03 -3.74 -0.02 3.75 16 23 C -0.15 -2.55 4.95 -26.63 -0.13 -2.68 16 24 C -0.12 -1.45 2.91 -88.67 -0.26 -1.71 16 25 H 0.10 1.31 8.05 -51.93 -0.42 0.89 16 26 C -0.15 -1.52 6.55 -24.48 -0.16 -1.68 16 27 C 0.05 0.62 7.78 38.19 0.30 0.92 16 28 O -0.38 -6.10 11.36 -35.23 -0.40 -6.50 16 29 C 0.06 0.91 6.71 37.88 0.25 1.17 16 30 H 0.06 0.53 8.14 -51.93 -0.42 0.10 16 31 H 0.07 0.47 8.14 -51.93 -0.42 0.05 16 32 H 0.07 0.67 8.14 -51.93 -0.42 0.25 16 33 H 0.05 0.38 8.08 -51.93 -0.42 -0.04 16 34 H 0.05 0.57 8.14 -51.93 -0.42 0.15 16 35 H 0.40 5.47 7.17 -40.82 -0.29 5.18 16 36 H 0.05 0.63 8.14 -51.93 -0.42 0.21 16 37 H 0.06 0.83 8.14 -51.93 -0.42 0.41 16 38 H 0.07 1.16 6.16 -51.92 -0.32 0.84 16 39 H 0.07 1.39 6.21 -51.93 -0.32 1.07 16 40 H 0.06 1.19 8.14 -51.93 -0.42 0.76 16 41 H 0.05 1.10 7.93 -51.93 -0.41 0.68 16 42 H 0.02 0.36 6.03 -51.93 -0.31 0.05 16 43 H 0.25 6.83 8.31 -40.82 -0.34 6.49 16 44 H 0.09 2.23 6.04 -51.93 -0.31 1.92 16 45 H 0.01 0.31 6.94 -51.93 -0.36 -0.05 16 46 H 0.07 1.30 8.14 -51.93 -0.42 0.88 16 47 H 0.05 0.82 8.14 -51.93 -0.42 0.39 16 48 H 0.08 0.67 8.14 -51.93 -0.42 0.25 16 49 H 0.09 0.92 7.21 -51.93 -0.37 0.55 16 50 H 0.08 0.82 8.14 -51.93 -0.42 0.40 16 51 H 0.06 0.70 8.14 -51.93 -0.42 0.28 16 52 H 0.08 1.36 7.17 -51.93 -0.37 0.99 16 53 H 0.08 1.32 6.43 -51.93 -0.33 0.98 16 LS Contribution 399.41 15.07 6.02 6.02 Total: -1.00 -30.85 399.41 -9.06 -39.91 By element: Atomic # 1 Polarization: 15.47 SS G_CDS: -9.28 Total: 6.19 kcal Atomic # 6 Polarization: 1.97 SS G_CDS: 0.32 Total: 2.29 kcal Atomic # 7 Polarization: -49.81 SS G_CDS: -0.09 Total: -49.90 kcal Atomic # 8 Polarization: -19.92 SS G_CDS: -1.00 Total: -20.93 kcal Atomic # 14 Polarization: 21.44 SS G_CDS: -5.03 Total: 16.41 kcal Total LS contribution 6.02 Total: 6.02 kcal Total: -30.85 -9.06 -39.91 kcal The number of atoms in the molecule is 53 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. ZINC001270243679.mol2 53 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 -68.736 kcal (2) G-P(sol) polarization free energy of solvation -30.853 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -99.590 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -9.061 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -39.914 kcal (6) G-S(sol) free energy of system = (1) + (5) -108.650 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 1.02 seconds