Wall clock time and date at job start Wed Apr 1 2020 01:37:42 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 1.50704 * 1 3 3 C 1.38261 * 119.99835 * 2 1 4 4 C 1.38210 * 119.99966 * 180.27146 * 3 2 1 5 5 C 1.38261 * 119.99926 * 359.74996 * 4 3 2 6 6 C 1.38214 * 119.99717 * 359.97399 * 5 4 3 7 7 C 1.38207 * 120.00062 * 179.74442 * 2 1 3 8 8 C 1.50698 * 119.99939 * 359.97438 * 7 2 1 9 9 C 1.52997 * 109.46987 * 84.73008 * 8 7 2 10 10 H 1.08998 * 109.47044 * 304.99585 * 9 8 7 11 11 C 1.52997 * 109.47487 * 64.99740 * 9 8 7 12 12 C 1.50703 * 109.47046 * 184.99881 * 9 8 7 13 13 O 1.21277 * 120.00103 * 0.02562 * 12 9 8 14 14 N 1.34778 * 119.99900 * 179.97438 * 12 9 8 15 15 C 1.47398 * 125.59293 * 359.97438 * 14 12 9 16 16 C 1.54846 * 104.81477 * 204.62669 * 15 14 12 17 17 C 1.55122 * 101.77979 * 322.81854 * 16 15 14 18 18 H 1.08994 * 112.94922 * 158.05136 * 17 16 15 19 19 C 1.54046 * 108.83492 * 285.88388 * 17 16 15 20 20 N 1.46699 * 106.83002 * 136.02095 * 19 17 16 21 21 C 1.36937 * 125.32474 * 161.82172 * 20 19 17 22 22 H 1.07999 * 120.00068 * 359.97438 * 21 20 19 23 23 C 1.38817 * 119.99911 * 179.97438 * 21 20 19 24 24 N 1.31611 * 120.00241 * 0.02562 * 23 21 20 25 25 Si 1.86801 * 119.99779 * 179.97438 * 23 21 20 26 26 H 1.48503 * 109.46795 * 60.00374 * 25 23 21 27 27 H 1.48494 * 109.47084 * 180.02562 * 25 23 21 28 28 H 1.48503 * 109.47432 * 300.00450 * 25 23 21 29 29 C 1.47816 * 109.48736 * 341.27960 * 20 19 17 30 30 C 1.46735 * 125.58748 * 180.02562 * 14 12 9 31 31 H 1.09002 * 111.32988 * 56.10296 * 30 14 12 32 32 H 1.09007 * 109.47023 * 270.25732 * 1 2 3 33 33 H 1.08998 * 109.47079 * 30.25354 * 1 2 3 34 34 H 1.09000 * 109.46745 * 150.25633 * 1 2 3 35 35 H 1.08000 * 119.99974 * 0.04046 * 3 2 1 36 36 H 1.07997 * 120.00296 * 179.76468 * 4 3 2 37 37 H 1.08000 * 119.99995 * 179.97438 * 5 4 3 38 38 H 1.08002 * 120.00160 * 179.97438 * 6 5 4 39 39 H 1.09001 * 109.47362 * 324.72584 * 8 7 2 40 40 H 1.09007 * 109.47038 * 204.72244 * 8 7 2 41 41 H 1.09004 * 109.47057 * 179.97438 * 11 9 8 42 42 H 1.08993 * 109.47381 * 300.00199 * 11 9 8 43 43 H 1.09002 * 109.47080 * 60.00387 * 11 9 8 44 44 H 1.08997 * 110.36798 * 323.46444 * 15 14 12 45 45 H 1.09006 * 110.36704 * 85.68427 * 15 14 12 46 46 H 1.09011 * 110.96416 * 80.93737 * 16 15 14 47 47 H 1.08998 * 110.97086 * 204.65790 * 16 15 14 48 48 H 1.09005 * 109.98433 * 255.35861 * 19 17 16 49 49 H 1.08993 * 109.99064 * 16.63130 * 19 17 16 50 50 H 0.96997 * 120.00481 * 179.97438 * 24 23 21 51 51 H 1.08998 * 110.40958 * 242.47010 * 29 20 19 52 52 H 1.09000 * 109.71009 * 121.38762 * 29 20 19 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 1.5070 0.0000 0.0000 3 6 2.1983 1.1974 0.0000 4 6 3.5804 1.1974 -0.0057 5 6 4.2717 0.0001 -0.0061 6 6 3.5806 -1.1969 -0.0004 7 6 2.1981 -1.1969 0.0053 8 6 1.4446 -2.5020 0.0117 9 6 1.0743 -2.8841 -1.4227 10 1 0.5226 -2.0660 -1.8857 11 6 2.3493 -3.1567 -2.2232 12 6 0.2165 -4.1230 -1.4070 13 8 -0.0709 -4.6483 -0.3524 14 7 -0.2323 -4.6467 -2.5650 15 6 0.0391 -4.1107 -3.9110 16 6 -1.1363 -4.6165 -4.7830 17 6 -1.3725 -6.0359 -4.2036 18 1 -2.3738 -6.4163 -4.4057 19 6 -0.2386 -6.9630 -4.6810 20 7 0.1815 -7.7535 -3.5188 21 6 0.8981 -8.9191 -3.5712 22 1 1.1990 -9.3256 -4.5255 23 6 1.2379 -9.5784 -2.3978 24 7 0.8708 -9.0834 -1.2349 25 14 2.2149 -11.1689 -2.4694 26 1 3.5205 -10.9184 -3.1311 27 1 2.4462 -11.6703 -1.0909 28 1 1.4542 -12.1828 -3.2433 29 6 -0.2771 -7.0906 -2.2797 30 6 -1.0720 -5.8432 -2.6924 31 1 -1.9901 -5.7468 -2.1128 32 1 -0.3633 0.0046 1.0277 33 1 -0.3633 0.8877 -0.5178 34 1 -0.3633 -0.8923 -0.5099 35 1 1.6583 2.1327 0.0007 36 1 4.1204 2.1327 -0.0095 37 1 5.3517 0.0001 -0.0110 38 1 4.1206 -2.1322 -0.0011 39 1 0.5366 -2.3944 0.6051 40 1 2.0716 -3.2814 0.4450 41 1 2.0854 -3.4294 -3.2451 42 1 2.9698 -2.2607 -2.2346 43 1 2.9010 -3.9749 -1.7603 44 1 0.0542 -3.0211 -3.8895 45 1 0.9866 -4.4953 -4.2885 46 1 -2.0182 -3.9895 -4.6506 47 1 -0.8497 -4.6661 -5.8334 48 1 -0.6034 -7.6229 -5.4682 49 1 0.5974 -6.3693 -5.0505 50 1 1.1079 -9.5442 -0.4149 51 1 0.5756 -6.7981 -1.6671 52 1 -0.9200 -7.7674 -1.7170 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 ZINC001076619824.mol2 52 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED SCF FIELD WAS ACHIEVED Wall clock time and date at job start Wed Apr 1 2020 01:37:42 Heat of formation + Delta-G solvation = 13.566574 kcal Electronic energy + Delta-G solvation = -31080.949711 eV Core-core repulsion = 27238.573184 eV Total energy + Delta-G solvation = -3842.376527 eV No. of doubly occupied orbitals = 65 Molecular weight (most abundant/longest-lived isotopes) = 342.205 amu Computer time = 1.20 seconds Orbital eigenvalues (eV) -40.44967 -39.64758 -37.91600 -34.97245 -34.63761 -32.84436 -32.15829 -30.86489 -30.76703 -28.67798 -27.32077 -26.57261 -26.33589 -24.64130 -23.81412 -22.18025 -21.89133 -20.83857 -20.24001 -19.46648 -18.31328 -17.17323 -16.68585 -16.27426 -15.81720 -15.63434 -15.10317 -14.88930 -14.62414 -14.43835 -13.85182 -13.81639 -13.58674 -13.33202 -13.25044 -13.03563 -12.82924 -12.57798 -12.54089 -12.26114 -12.18729 -12.02456 -11.98238 -11.74172 -11.51717 -11.24804 -11.11867 -11.03177 -10.91885 -10.85566 -10.79454 -10.65144 -10.43362 -10.20670 -10.12486 -9.84266 -9.64685 -9.23327 -8.87699 -8.63536 -8.54569 -8.09953 -6.77453 -5.63152 -2.99136 1.24460 1.28811 3.08743 3.39266 3.43463 3.47325 3.49734 3.67347 4.52004 4.55254 4.69510 4.78591 4.79585 4.88172 4.89987 4.95204 5.05912 5.11695 5.17364 5.26347 5.37969 5.41704 5.49726 5.51510 5.52436 5.56814 5.63305 5.72584 5.75796 5.79064 5.81119 5.82690 5.88831 5.89549 5.98346 6.04019 6.07775 6.23212 6.27554 6.30423 6.36653 6.39238 6.42150 6.53115 6.61120 6.63167 6.67217 6.90424 6.92885 7.60472 7.70034 7.93443 8.05259 8.31953 8.66278 9.26386 9.88394 10.52504 11.46590 Molecular weight = 342.20amu Principal moments of inertia in cm(-1) A = 0.013976 B = 0.003050 C = 0.002745 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 2003.019675 B = 9177.194650 C =10196.397256 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.120 4.120 2 C -0.083 4.083 3 C -0.122 4.122 4 C -0.125 4.125 5 C -0.126 4.126 6 C -0.110 4.110 7 C -0.073 4.073 8 C -0.064 4.064 9 C -0.096 4.096 10 H 0.091 0.909 11 C -0.152 4.152 12 C 0.529 3.471 13 O -0.531 6.531 14 N -0.602 5.602 15 C 0.101 3.899 16 C -0.126 4.126 17 C -0.109 4.109 18 H 0.096 0.904 19 C 0.145 3.855 20 N -0.604 5.604 21 C -0.234 4.234 22 H 0.076 0.924 23 C -0.006 4.006 24 N -0.915 5.915 25 Si 0.910 3.090 26 H -0.286 1.286 27 H -0.290 1.290 28 H -0.285 1.285 29 C 0.179 3.821 30 C 0.113 3.887 31 H 0.076 0.924 32 H 0.071 0.929 33 H 0.064 0.936 34 H 0.071 0.929 35 H 0.118 0.882 36 H 0.118 0.882 37 H 0.119 0.881 38 H 0.123 0.877 39 H 0.082 0.918 40 H 0.081 0.919 41 H 0.066 0.934 42 H 0.065 0.935 43 H 0.063 0.937 44 H 0.069 0.931 45 H 0.072 0.928 46 H 0.070 0.930 47 H 0.081 0.919 48 H 0.034 0.966 49 H 0.017 0.983 50 H 0.253 0.747 51 H 0.054 0.946 52 H 0.053 0.947 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges 0.133 21.777 -2.665 21.940 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 -0.177 4.177 2 C -0.083 4.083 3 C -0.140 4.140 4 C -0.143 4.143 5 C -0.144 4.144 6 C -0.128 4.128 7 C -0.073 4.073 8 C -0.102 4.102 9 C -0.118 4.118 10 H 0.109 0.891 11 C -0.209 4.209 12 C 0.317 3.683 13 O -0.407 6.407 14 N -0.336 5.336 15 C -0.022 4.022 16 C -0.164 4.164 17 C -0.129 4.129 18 H 0.114 0.886 19 C 0.019 3.981 20 N -0.331 5.331 21 C -0.362 4.362 22 H 0.094 0.906 23 C -0.203 4.203 24 N -0.562 5.562 25 Si 0.741 3.259 26 H -0.213 1.213 27 H -0.216 1.216 28 H -0.212 1.212 29 C 0.054 3.946 30 C 0.009 3.991 31 H 0.094 0.906 32 H 0.089 0.911 33 H 0.083 0.917 34 H 0.090 0.910 35 H 0.136 0.864 36 H 0.136 0.864 37 H 0.137 0.863 38 H 0.141 0.859 39 H 0.101 0.899 40 H 0.099 0.901 41 H 0.085 0.915 42 H 0.084 0.916 43 H 0.082 0.918 44 H 0.087 0.913 45 H 0.090 0.910 46 H 0.089 0.911 47 H 0.100 0.900 48 H 0.052 0.948 49 H 0.034 0.966 50 H 0.064 0.936 51 H 0.072 0.928 52 H 0.071 0.929 Dipole moment (debyes) X Y Z Total from point charges 0.088 21.355 -1.845 21.434 hybrid contribution 0.685 -0.807 -0.057 1.060 sum 0.774 20.548 -1.901 20.650 Atomic orbital electron populations 1.20885 0.91347 1.02869 1.02556 1.19799 0.96011 0.92595 0.99865 1.20987 0.94253 0.97294 1.01419 1.21080 0.94300 0.97918 1.00991 1.21117 0.99754 0.92546 1.00966 1.21130 0.93669 0.98247 0.99720 1.19795 0.93672 0.94506 0.99360 1.20435 1.00765 0.93610 0.95391 1.21182 0.97058 0.95927 0.97590 0.89111 1.21954 0.96136 1.02412 1.00377 1.20119 0.80194 0.85347 0.82615 1.90730 1.57936 1.62144 1.29936 1.48386 1.51456 1.28378 1.05379 1.22381 0.98882 0.97886 0.83044 1.22774 0.97847 0.96474 0.99305 1.23123 1.00294 0.95120 0.94363 0.88616 1.21222 0.92937 0.92437 0.91509 1.44499 1.64260 1.24449 0.99869 1.18957 1.26960 0.97409 0.92872 0.90590 1.24825 1.01009 0.99087 0.95364 1.69972 1.50021 1.39592 0.96602 0.86235 0.79841 0.83302 0.76552 1.21261 1.21616 1.21193 1.21438 0.96734 0.88168 0.88289 1.22646 0.93840 0.86793 0.95824 0.90628 0.91064 0.91700 0.91038 0.86365 0.86433 0.86292 0.85906 0.89915 0.90078 0.91515 0.91629 0.91803 0.91309 0.90972 0.91113 0.90030 0.94788 0.96582 0.93637 0.92800 0.92899 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 -0.12 -1.10 9.22 36.01 0.33 -0.77 16 2 C -0.08 -0.87 5.88 -104.62 -0.62 -1.49 16 3 C -0.12 -1.16 9.70 -39.58 -0.38 -1.54 16 4 C -0.12 -1.15 10.05 -39.58 -0.40 -1.55 16 5 C -0.13 -1.23 10.05 -39.58 -0.40 -1.63 16 6 C -0.11 -1.21 8.36 -39.58 -0.33 -1.54 16 7 C -0.07 -0.85 4.56 -104.63 -0.48 -1.33 16 8 C -0.06 -0.86 3.48 -27.89 -0.10 -0.95 16 9 C -0.10 -1.30 1.80 -91.77 -0.17 -1.46 16 10 H 0.09 1.05 6.69 -51.93 -0.35 0.70 16 11 C -0.15 -1.94 8.64 37.16 0.32 -1.62 16 12 C 0.53 9.52 6.76 -10.98 -0.07 9.44 16 13 O -0.53 -11.81 15.76 5.56 0.09 -11.72 16 14 N -0.60 -10.41 2.98 -162.38 -0.48 -10.89 16 15 C 0.10 1.35 4.67 -2.58 -0.01 1.34 16 16 C -0.13 -1.54 6.36 -24.64 -0.16 -1.69 16 17 C -0.11 -1.79 4.30 -87.74 -0.38 -2.17 16 18 H 0.10 1.44 8.14 -51.93 -0.42 1.02 16 19 C 0.15 2.91 6.48 -3.39 -0.02 2.89 16 20 N -0.60 -15.56 3.41 -171.03 -0.58 -16.15 16 21 C -0.23 -6.61 10.25 -15.06 -0.15 -6.76 16 22 H 0.08 2.06 7.83 -52.49 -0.41 1.65 16 23 C -0.01 -0.17 5.48 -17.43 -0.10 -0.27 16 24 N -0.92 -27.98 10.24 55.49 0.57 -27.41 16 25 Si 0.91 22.59 29.55 -169.99 -5.02 17.56 16 26 H -0.29 -6.97 7.11 56.52 0.40 -6.57 16 27 H -0.29 -7.29 7.11 56.52 0.40 -6.89 16 28 H -0.29 -6.94 7.11 56.52 0.40 -6.54 16 29 C 0.18 4.56 4.96 -3.03 -0.02 4.54 16 30 C 0.11 2.21 3.57 -66.30 -0.24 1.97 16 31 H 0.08 1.48 8.14 -51.93 -0.42 1.06 16 32 H 0.07 0.62 8.14 -51.93 -0.42 0.20 16 33 H 0.06 0.49 8.09 -51.93 -0.42 0.07 16 34 H 0.07 0.70 5.46 -51.93 -0.28 0.42 16 35 H 0.12 0.89 8.06 -52.49 -0.42 0.47 16 36 H 0.12 0.83 8.06 -52.49 -0.42 0.40 16 37 H 0.12 0.93 8.06 -52.49 -0.42 0.51 16 38 H 0.12 1.29 8.06 -52.49 -0.42 0.87 16 39 H 0.08 1.14 6.82 -51.93 -0.35 0.79 16 40 H 0.08 1.20 8.05 -51.93 -0.42 0.78 16 41 H 0.07 0.83 5.00 -51.93 -0.26 0.57 16 42 H 0.06 0.73 6.52 -51.93 -0.34 0.39 16 43 H 0.06 0.94 8.14 -51.93 -0.42 0.51 16 44 H 0.07 0.73 7.31 -51.93 -0.38 0.35 16 45 H 0.07 1.03 6.19 -51.93 -0.32 0.71 16 46 H 0.07 0.75 8.14 -51.92 -0.42 0.33 16 47 H 0.08 0.86 8.09 -51.93 -0.42 0.43 16 48 H 0.03 0.67 8.14 -51.93 -0.42 0.24 16 49 H 0.02 0.32 6.60 -51.93 -0.34 -0.02 16 50 H 0.25 7.60 8.31 -40.82 -0.34 7.26 16 51 H 0.05 1.58 6.68 -51.93 -0.35 1.24 16 52 H 0.05 1.53 7.30 -51.93 -0.38 1.15 16 LS Contribution 393.86 15.07 5.94 5.94 Total: -1.00 -33.90 393.86 -11.24 -45.14 By element: Atomic # 1 Polarization: 10.50 SS G_CDS: -8.39 Total: 2.11 kcal Atomic # 6 Polarization: -1.23 SS G_CDS: -3.36 Total: -4.58 kcal Atomic # 7 Polarization: -53.96 SS G_CDS: -0.50 Total: -54.45 kcal Atomic # 8 Polarization: -11.81 SS G_CDS: 0.09 Total: -11.72 kcal Atomic # 14 Polarization: 22.59 SS G_CDS: -5.02 Total: 17.56 kcal Total LS contribution 5.94 Total: 5.94 kcal Total: -33.90 -11.24 -45.14 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. ZINC001076619824.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 58.711 kcal (2) G-P(sol) polarization free energy of solvation -33.905 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system 24.807 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -11.240 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -45.145 kcal (6) G-S(sol) free energy of system = (1) + (5) 13.567 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 1.20 seconds