Wall clock time and date at job start Tue Mar 31 2020 13:32:51 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 1.53001 * 1 3 3 C 1.53000 * 109.47366 * 2 1 4 4 C 1.53003 * 109.46762 * 120.00142 * 2 1 3 5 5 H 1.09004 * 109.47369 * 52.63218 * 4 2 1 6 6 C 1.50704 * 109.46878 * 172.62657 * 4 2 1 7 7 O 1.21285 * 119.99934 * 82.08429 * 6 4 2 8 8 N 1.34775 * 120.00304 * 262.08362 * 6 4 2 9 9 C 1.47152 * 125.59742 * 0.02635 * 8 6 4 10 10 C 1.54634 * 107.34168 * 180.91530 * 9 8 6 11 11 C 1.53473 * 102.73960 * 20.65993 * 10 9 8 12 12 C 1.53498 * 111.81383 * 205.62799 * 11 10 9 13 13 C 1.55209 * 101.39819 * 271.71987 * 12 11 10 14 14 N 1.47583 * 105.02789 * 324.67839 * 13 12 11 15 15 C 1.36933 * 125.67640 * 203.83570 * 14 13 12 16 16 H 1.07999 * 120.00109 * 165.08668 * 15 14 13 17 17 C 1.38815 * 119.99893 * 345.08359 * 15 14 13 18 18 N 1.31616 * 120.00064 * 0.43348 * 17 15 14 19 19 Si 1.86801 * 120.00083 * 180.43191 * 17 15 14 20 20 H 1.48497 * 109.46898 * 94.98155 * 19 17 15 21 21 H 1.48498 * 109.47114 * 214.98356 * 19 17 15 22 22 H 1.48497 * 109.46969 * 334.98209 * 19 17 15 23 23 C 1.47446 * 108.64716 * 23.82502 * 14 13 12 24 24 C 1.47757 * 125.59813 * 179.71844 * 8 6 4 25 25 N 1.46897 * 109.47044 * 292.62518 * 4 2 1 26 26 C 1.46900 * 110.99900 * 209.92969 * 25 4 2 27 27 C 1.46904 * 110.99857 * 85.98368 * 25 4 2 28 28 H 1.09004 * 109.46920 * 314.74432 * 1 2 3 29 29 H 1.09004 * 109.47053 * 74.74417 * 1 2 3 30 30 H 1.09002 * 109.47309 * 194.74763 * 1 2 3 31 31 H 1.09001 * 109.46818 * 239.99523 * 2 1 3 32 32 H 1.09002 * 109.47021 * 306.84214 * 3 2 1 33 33 H 1.09002 * 109.46860 * 66.84160 * 3 2 1 34 34 H 1.08993 * 109.46987 * 186.84241 * 3 2 1 35 35 H 1.09004 * 109.86906 * 300.35442 * 9 8 6 36 36 H 1.08999 * 109.87247 * 61.33810 * 9 8 6 37 37 H 1.09003 * 110.75358 * 138.96783 * 10 9 8 38 38 H 1.08993 * 110.75779 * 262.16133 * 10 9 8 39 39 H 1.08998 * 111.03999 * 29.75839 * 12 11 10 40 40 H 1.09000 * 111.03364 * 153.69342 * 12 11 10 41 41 H 1.08989 * 110.33422 * 205.78432 * 13 12 11 42 42 H 1.09009 * 110.41641 * 83.60247 * 13 12 11 43 43 H 0.97004 * 120.00420 * 180.02562 * 18 17 15 44 44 H 1.08991 * 109.99736 * 238.44031 * 23 14 13 45 45 H 1.09003 * 110.02655 * 117.12537 * 23 14 13 46 46 H 1.08996 * 110.39537 * 276.44943 * 24 8 6 47 47 H 1.08998 * 110.39580 * 38.85666 * 24 8 6 48 48 H 1.09001 * 109.47114 * 58.68707 * 26 25 4 49 49 H 1.08995 * 109.47473 * 298.68295 * 26 25 4 50 50 H 1.08998 * 109.46904 * 178.68075 * 26 25 4 51 51 H 1.08995 * 109.47023 * 191.88296 * 27 25 4 52 52 H 1.09005 * 109.46983 * 311.87591 * 27 25 4 53 53 H 1.08991 * 109.47316 * 71.87411 * 27 25 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 6 1.5300 0.0000 0.0000 3 6 2.0401 1.4425 0.0000 4 6 2.0399 -0.7213 1.2493 5 1 1.5730 -1.7039 1.3176 6 6 3.5359 -0.8812 1.1615 7 8 4.2633 0.0371 1.4753 8 7 4.0654 -2.0446 0.7343 9 6 3.3019 -3.2337 0.3238 10 6 4.3245 -4.3272 -0.0631 11 6 5.6016 -3.8640 0.6508 12 6 6.8659 -4.3851 -0.0466 13 6 7.0585 -5.7572 0.6528 14 7 6.6243 -5.5406 2.0466 15 6 7.0199 -6.2786 3.1301 16 1 6.8463 -5.9069 4.1291 17 6 7.6439 -7.5046 2.9444 18 7 7.8631 -7.9538 1.7268 19 14 8.1727 -8.5169 4.4226 20 1 7.1137 -9.5050 4.7502 21 1 9.4357 -9.2312 4.1072 22 1 8.3889 -7.6191 5.5856 23 6 5.6939 -4.3972 2.0782 24 6 5.5078 -2.3334 0.5953 25 7 1.7008 0.0662 2.4421 26 6 2.6919 -0.1380 3.5070 27 6 0.3468 -0.2516 2.9152 28 1 -0.3633 0.7234 0.7299 29 1 -0.3633 0.2704 -0.9915 30 1 -0.3634 -0.9938 0.2616 31 1 1.8933 -0.5139 -0.8900 32 1 1.5802 1.9904 -0.8225 33 1 1.7801 1.9197 0.9449 34 1 3.1231 1.4448 -0.1224 35 1 2.6835 -3.5809 1.1516 36 1 2.6725 -2.9923 -0.5327 37 1 4.0066 -5.3018 0.3074 38 1 4.4705 -4.3548 -1.1428 39 1 6.6990 -4.5110 -1.1163 40 1 7.7150 -3.7278 0.1406 41 1 8.1072 -6.0528 0.6244 42 1 6.4385 -6.5170 0.1768 43 1 8.2988 -8.8106 1.5970 44 1 6.0780 -3.6224 2.7415 45 1 4.7113 -4.7249 2.4179 46 1 5.8792 -1.9618 -0.3597 47 1 6.0654 -1.8891 1.4197 48 1 3.6790 0.1490 3.1445 49 1 2.7025 -1.1886 3.7969 50 1 2.4295 0.4744 4.3696 51 1 0.0401 0.4835 3.6592 52 1 -0.3466 -0.2286 2.0744 53 1 0.3422 -1.2454 3.3628 RHF calculation, no. of doubly occupied orbitals= 63 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 ZINC001041380325.mol2 53 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 13:32:51 Heat of formation + Delta-G solvation = 14.742526 kcal Electronic energy + Delta-G solvation = -29781.568988 eV Core-core repulsion = 26075.646868 eV Total energy + Delta-G solvation = -3705.922121 eV No. of doubly occupied orbitals = 63 Molecular weight (most abundant/longest-lived isotopes) = 323.231 amu Computer time = 0.81 seconds Orbital eigenvalues (eV) -40.83420 -39.22567 -37.11245 -35.71164 -34.32300 -32.75173 -30.58519 -29.47169 -28.96140 -28.18589 -27.36974 -26.75696 -25.59904 -23.85519 -22.73792 -22.50534 -20.68610 -20.36507 -19.15436 -18.56361 -17.23740 -16.79140 -16.31885 -15.95974 -15.36256 -15.02076 -14.76988 -14.46476 -14.28787 -14.05218 -13.82895 -13.76285 -13.27208 -13.15591 -12.86888 -12.78041 -12.63835 -12.36883 -12.32766 -12.26129 -11.88777 -11.64531 -11.52118 -11.45506 -11.39953 -11.28345 -11.19808 -10.94707 -10.88630 -10.80599 -10.52601 -10.25750 -10.06264 -9.97140 -9.81192 -9.73861 -9.46800 -8.62984 -8.54687 -8.43249 -6.78928 -5.77534 -3.12638 2.52313 2.90824 3.37378 3.43281 3.45004 3.80624 4.30315 4.46163 4.63733 4.66276 4.75302 4.82644 4.96678 5.00515 5.10284 5.15645 5.25271 5.27983 5.36250 5.40199 5.46818 5.48512 5.50360 5.55469 5.62355 5.67009 5.74835 5.76264 5.78963 5.84558 5.91257 5.95463 5.98634 6.05226 6.15769 6.17473 6.19959 6.31689 6.34940 6.48092 6.50341 6.58617 6.71763 6.78472 6.81389 6.87651 7.48111 7.54607 7.57747 7.76907 8.17346 8.25036 9.17536 9.77902 10.47207 11.35093 Molecular weight = 323.23amu Principal moments of inertia in cm(-1) A = 0.020721 B = 0.003080 C = 0.002906 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1350.938303 B = 9089.781468 C = 9632.881159 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 -0.076 4.076 3 C -0.139 4.139 4 C 0.073 3.927 5 H 0.063 0.937 6 C 0.529 3.471 7 O -0.524 6.524 8 N -0.613 5.613 9 C 0.100 3.900 10 C -0.112 4.112 11 C -0.080 4.080 12 C -0.133 4.133 13 C 0.176 3.824 14 N -0.603 5.603 15 C -0.229 4.229 16 H 0.074 0.926 17 C -0.004 4.004 18 N -0.918 5.918 19 Si 0.910 3.090 20 H -0.289 1.289 21 H -0.290 1.290 22 H -0.280 1.280 23 C 0.155 3.845 24 C 0.123 3.877 25 N -0.517 5.517 26 C -0.010 4.010 27 C 0.006 3.994 28 H 0.068 0.932 29 H 0.056 0.944 30 H 0.052 0.948 31 H 0.070 0.930 32 H 0.044 0.956 33 H 0.075 0.925 34 H 0.056 0.944 35 H 0.065 0.935 36 H 0.066 0.934 37 H 0.088 0.912 38 H 0.076 0.924 39 H 0.063 0.937 40 H 0.063 0.937 41 H 0.070 0.930 42 H 0.027 0.973 43 H 0.253 0.747 44 H 0.023 0.977 45 H 0.021 0.979 46 H 0.068 0.932 47 H 0.079 0.921 48 H 0.112 0.888 49 H 0.020 0.980 50 H 0.065 0.935 51 H 0.070 0.930 52 H 0.083 0.917 53 H 0.025 0.975 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -14.995 14.037 -5.690 21.314 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 -0.095 4.095 3 C -0.196 4.196 4 C -0.039 4.039 5 H 0.081 0.919 6 C 0.317 3.683 7 O -0.401 6.401 8 N -0.347 5.347 9 C -0.023 4.023 10 C -0.150 4.150 11 C -0.082 4.082 12 C -0.172 4.172 13 C 0.051 3.949 14 N -0.329 5.329 15 C -0.358 4.358 16 H 0.091 0.909 17 C -0.201 4.201 18 N -0.565 5.565 19 Si 0.740 3.260 20 H -0.216 1.216 21 H -0.217 1.217 22 H -0.206 1.206 23 C 0.029 3.971 24 C 0.001 3.999 25 N -0.242 5.242 26 C -0.158 4.158 27 C -0.142 4.142 28 H 0.087 0.913 29 H 0.075 0.925 30 H 0.071 0.929 31 H 0.088 0.912 32 H 0.063 0.937 33 H 0.094 0.906 34 H 0.075 0.925 35 H 0.084 0.916 36 H 0.084 0.916 37 H 0.107 0.893 38 H 0.095 0.905 39 H 0.082 0.918 40 H 0.082 0.918 41 H 0.088 0.912 42 H 0.045 0.955 43 H 0.063 0.937 44 H 0.041 0.959 45 H 0.039 0.961 46 H 0.086 0.914 47 H 0.097 0.903 48 H 0.130 0.870 49 H 0.038 0.962 50 H 0.084 0.916 51 H 0.089 0.911 52 H 0.101 0.899 53 H 0.044 0.956 Dipole moment (debyes) X Y Z Total from point charges -14.521 14.890 -5.566 21.531 hybrid contribution 0.114 -1.698 1.068 2.009 sum -14.407 13.192 -4.497 20.045 Atomic orbital electron populations 1.22041 0.94771 1.01695 1.02014 1.20974 0.95971 0.97778 0.94777 1.21727 1.01166 0.94475 1.02236 1.21820 0.91941 0.96447 0.93674 0.91906 1.20088 0.90186 0.81016 0.77004 1.90572 1.62273 1.39181 1.48118 1.48743 1.08384 1.12732 1.64821 1.22188 0.95129 0.85625 0.99320 1.22460 0.93829 0.98136 1.00593 1.21586 0.95984 0.92662 0.97942 1.22821 0.95259 1.00645 0.98464 1.21468 1.00490 0.89721 0.83241 1.44584 1.49846 1.34117 1.04382 1.19009 1.33229 0.97806 0.85753 0.90859 1.24892 1.01618 0.96907 0.96682 1.69923 1.47306 1.20464 1.18808 0.86128 0.77768 0.80278 0.81780 1.21577 1.21653 1.20573 1.21008 0.93524 0.90766 0.91811 1.22176 0.80730 0.95164 1.01828 1.61905 1.02599 1.54707 1.04983 1.23132 0.99444 0.99045 0.94130 1.22868 0.90518 0.99434 1.01374 0.91302 0.92508 0.92860 0.91174 0.93682 0.90621 0.92507 0.91649 0.91558 0.89300 0.90520 0.91788 0.91818 0.91206 0.95506 0.93689 0.95915 0.96107 0.91354 0.90260 0.87034 0.96168 0.91630 0.91139 0.89875 0.95648 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 14. 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 -1.12 7.66 37.16 0.28 -0.83 16 2 C -0.08 -0.74 2.72 -90.62 -0.25 -0.99 16 3 C -0.14 -1.50 8.59 37.16 0.32 -1.18 16 4 C 0.07 0.83 1.74 -68.86 -0.12 0.71 16 5 H 0.06 0.67 6.40 -51.93 -0.33 0.34 16 6 C 0.53 7.50 5.39 -10.98 -0.06 7.44 16 7 O -0.52 -8.89 13.10 5.55 0.07 -8.82 16 8 N -0.61 -8.44 3.34 -170.86 -0.57 -9.01 16 9 C 0.10 1.18 6.04 -2.83 -0.02 1.16 16 10 C -0.11 -1.52 5.79 -25.63 -0.15 -1.67 16 11 C -0.08 -1.31 0.61 -153.95 -0.09 -1.41 16 12 C -0.13 -2.33 6.06 -25.30 -0.15 -2.48 16 13 C 0.18 4.07 5.38 -2.28 -0.01 4.06 16 14 N -0.60 -15.12 3.41 -170.44 -0.58 -15.70 16 15 C -0.23 -6.37 10.24 -15.06 -0.15 -6.52 16 16 H 0.07 2.00 7.83 -52.49 -0.41 1.59 16 17 C 0.00 -0.12 5.47 -17.43 -0.10 -0.21 16 18 N -0.92 -26.46 10.58 55.49 0.59 -25.88 16 19 Si 0.91 21.93 29.55 -169.99 -5.02 16.90 16 20 H -0.29 -6.94 7.11 56.52 0.40 -6.54 16 21 H -0.29 -7.03 7.11 56.52 0.40 -6.63 16 22 H -0.28 -6.62 7.11 56.52 0.40 -6.22 16 23 C 0.15 3.18 6.45 -3.70 -0.02 3.15 16 24 C 0.12 1.84 5.92 -3.12 -0.02 1.82 16 25 N -0.52 -5.94 3.59 -244.58 -0.88 -6.82 16 26 C -0.01 -0.13 8.66 60.06 0.52 0.39 16 27 C 0.01 0.05 9.16 60.07 0.55 0.60 16 28 H 0.07 0.52 6.38 -51.93 -0.33 0.19 16 29 H 0.06 0.38 8.14 -51.93 -0.42 -0.04 16 30 H 0.05 0.37 7.55 -51.93 -0.39 -0.03 16 31 H 0.07 0.68 8.13 -51.93 -0.42 0.26 16 32 H 0.04 0.41 8.14 -51.93 -0.42 -0.01 16 33 H 0.07 0.89 7.18 -51.93 -0.37 0.51 16 34 H 0.06 0.74 6.95 -51.93 -0.36 0.38 16 35 H 0.07 0.75 7.78 -51.93 -0.40 0.35 16 36 H 0.07 0.63 8.14 -51.93 -0.42 0.21 16 37 H 0.09 1.33 7.94 -51.93 -0.41 0.91 16 38 H 0.08 0.92 7.81 -51.93 -0.41 0.51 16 39 H 0.06 0.97 7.77 -51.93 -0.40 0.57 16 40 H 0.06 1.11 8.09 -51.93 -0.42 0.69 16 41 H 0.07 1.83 6.95 -51.94 -0.36 1.47 16 42 H 0.03 0.67 8.05 -51.92 -0.42 0.25 16 43 H 0.25 7.08 8.31 -40.82 -0.34 6.74 16 44 H 0.02 0.49 7.60 -51.93 -0.39 0.09 16 45 H 0.02 0.44 7.78 -51.93 -0.40 0.03 16 46 H 0.07 0.95 8.06 -51.93 -0.42 0.54 16 47 H 0.08 1.32 7.62 -51.93 -0.40 0.92 16 48 H 0.11 1.72 4.76 -52.26 -0.25 1.47 16 49 H 0.02 0.27 8.14 -51.93 -0.42 -0.16 16 50 H 0.06 0.75 8.14 -51.93 -0.42 0.32 16 51 H 0.07 0.58 8.14 -51.93 -0.42 0.15 16 52 H 0.08 0.63 4.08 -51.93 -0.21 0.42 16 53 H 0.02 0.23 8.10 -51.93 -0.42 -0.19 16 LS Contribution 390.72 15.07 5.89 5.89 Total: -1.00 -30.71 390.72 -9.58 -40.30 By element: Atomic # 1 Polarization: 8.71 SS G_CDS: -9.61 Total: -0.90 kcal Atomic # 6 Polarization: 3.51 SS G_CDS: 0.53 Total: 4.04 kcal Atomic # 7 Polarization: -55.97 SS G_CDS: -1.44 Total: -57.41 kcal Atomic # 8 Polarization: -8.89 SS G_CDS: 0.07 Total: -8.82 kcal Atomic # 14 Polarization: 21.93 SS G_CDS: -5.02 Total: 16.90 kcal Total LS contribution 5.89 Total: 5.89 kcal Total: -30.71 -9.58 -40.30 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. ZINC001041380325.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 55.040 kcal (2) G-P(sol) polarization free energy of solvation -30.713 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system 24.327 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -9.584 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -40.298 kcal (6) G-S(sol) free energy of system = (1) + (5) 14.743 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.81 seconds