Wall clock time and date at job start Tue Mar 31 2020 19:22:24 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 1.52998 * 1 3 3 C 1.52998 * 109.47522 * 2 1 4 4 H 1.08999 * 115.55867 * 29.30569 * 3 2 1 5 5 C 1.53004 * 117.50060 * 243.62534 * 3 2 1 6 6 C 1.52991 * 117.50131 * 174.99954 * 3 2 1 7 7 H 1.09003 * 117.52099 * 0.02562 * 6 3 2 8 8 C 1.50703 * 117.49984 * 214.97820 * 6 3 2 9 9 O 1.21284 * 119.99928 * 359.97438 * 8 6 3 10 10 N 1.34776 * 119.99898 * 179.97438 * 8 6 3 11 11 C 1.46506 * 119.99861 * 180.02562 * 10 8 6 12 12 H 1.08998 * 109.49601 * 324.92962 * 11 10 8 13 13 C 1.53206 * 109.49732 * 84.99663 * 11 10 8 14 14 N 1.46928 * 108.76304 * 174.67807 * 13 11 10 15 15 C 1.36931 * 120.63067 * 126.29937 * 14 13 11 16 16 H 1.07998 * 120.00546 * 331.88730 * 15 14 13 17 17 C 1.38819 * 119.99833 * 151.88430 * 15 14 13 18 18 N 1.31625 * 119.99819 * 343.10047 * 17 15 14 19 19 Si 1.86797 * 119.99919 * 163.09199 * 17 15 14 20 20 H 1.48498 * 109.46870 * 60.00357 * 19 17 15 21 21 H 1.48502 * 109.47181 * 180.02562 * 19 17 15 22 22 H 1.48500 * 109.47244 * 300.00310 * 19 17 15 23 23 C 1.46938 * 118.73089 * 306.32046 * 14 13 11 24 24 C 1.53086 * 108.82101 * 53.45720 * 23 14 13 25 25 C 1.53124 * 109.47662 * 185.51963 * 24 23 14 26 26 C 1.53103 * 109.14805 * 183.26592 * 25 24 23 27 27 O 1.42909 * 109.40771 * 57.51220 * 26 25 24 28 28 C 1.42898 * 114.11711 * 298.78498 * 27 26 25 29 29 C 1.53077 * 109.51584 * 65.81243 * 24 23 14 30 30 C 1.52940 * 109.50186 * 305.63237 * 24 23 14 31 31 H 1.09001 * 109.47093 * 59.99766 * 1 2 3 32 32 H 1.09003 * 109.47113 * 179.97438 * 1 2 3 33 33 H 1.08995 * 109.47070 * 300.00090 * 1 2 3 34 34 H 1.09008 * 109.47085 * 239.99596 * 2 1 3 35 35 H 1.09001 * 109.47093 * 120.00234 * 2 1 3 36 36 H 1.08993 * 117.49653 * 145.01744 * 5 3 2 37 37 H 1.09005 * 117.51219 * 359.97438 * 5 3 2 38 38 H 0.96994 * 120.00260 * 359.97438 * 10 8 6 39 39 H 1.08998 * 109.58293 * 54.89774 * 13 11 10 40 40 H 1.09000 * 109.58909 * 294.46165 * 13 11 10 41 41 H 0.97001 * 119.99649 * 180.02562 * 18 17 15 42 42 H 1.09006 * 109.58041 * 293.65498 * 23 14 13 43 43 H 1.08998 * 109.68733 * 173.32667 * 23 14 13 44 44 H 1.09007 * 109.54127 * 63.36263 * 25 24 23 45 45 H 1.08994 * 109.52314 * 303.16345 * 25 24 23 46 46 H 1.08998 * 109.48819 * 297.52815 * 26 25 24 47 47 H 1.09003 * 109.48331 * 177.49352 * 26 25 24 48 48 H 1.08997 * 109.48248 * 181.16470 * 28 27 26 49 49 H 1.09000 * 109.48351 * 301.19084 * 28 27 26 50 50 H 1.09003 * 109.52162 * 56.78509 * 29 24 23 51 51 H 1.08998 * 109.52085 * 296.59799 * 29 24 23 52 52 H 1.09005 * 109.45082 * 181.14466 * 30 24 23 53 53 H 1.08997 * 109.45230 * 301.07760 * 30 24 23 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 1.4424 0.0000 4 1 1.3884 2.1717 0.4813 5 6 2.8440 1.9075 -1.2159 6 6 3.5501 1.6578 0.1183 7 1 4.1807 0.7720 0.1957 8 6 4.0229 2.8619 0.8914 9 8 3.2158 3.6169 1.3910 10 7 5.3425 3.0998 1.0276 11 6 5.8020 4.2701 1.7796 12 1 5.1110 5.0981 1.6220 13 6 5.8593 3.9287 3.2721 14 7 6.4418 5.0673 3.9953 15 6 5.7848 5.6289 5.0574 16 1 4.7070 5.5864 5.1095 17 6 6.5044 6.2531 6.0672 18 7 7.7954 6.0281 6.1910 19 14 5.6406 7.4124 7.2501 20 1 4.5725 6.6764 7.9730 21 1 6.6236 7.9453 8.2273 22 1 5.0392 8.5375 6.4900 23 6 7.7424 5.5919 3.5569 24 6 7.6678 5.9101 2.0613 25 6 9.0526 6.3275 1.5585 26 6 8.9530 6.7222 0.0826 27 8 7.9983 7.7755 -0.0639 28 6 6.6747 7.4249 0.3448 29 6 6.6815 7.0580 1.8313 30 6 7.1986 4.6705 1.2983 31 1 -0.3633 0.5139 -0.8900 32 1 -0.3633 -1.0277 -0.0005 33 1 -0.3633 0.5138 0.8899 34 1 1.8933 -0.5139 -0.8900 35 1 1.8933 -0.5139 0.8900 36 1 2.7213 2.9427 -1.5343 37 1 3.0100 1.1859 -2.0158 38 1 5.9879 2.4958 0.6283 39 1 6.4797 3.0450 3.4211 40 1 4.8520 3.7373 3.6421 41 1 8.2981 6.4640 6.8969 42 1 8.5160 4.8445 3.7332 43 1 7.9783 6.4996 4.1122 44 1 9.7463 5.4936 1.6665 45 1 9.4102 7.1775 2.1395 46 1 8.6358 5.8599 -0.5038 47 1 9.9269 7.0627 -0.2692 48 1 6.0078 8.2716 0.1825 49 1 6.3280 6.5720 -0.2387 50 1 6.9869 7.9239 2.4188 51 1 5.6820 6.7455 2.1339 52 1 7.1653 4.8919 0.2315 53 1 7.8933 3.8498 1.4769 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 ZINC001089956749.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 19:22:24 Heat of formation + Delta-G solvation = -52.143949 kcal Electronic energy + Delta-G solvation = -31199.249515 eV Core-core repulsion = 27264.482177 eV Total energy + Delta-G solvation = -3934.767338 eV No. of doubly occupied orbitals = 65 Molecular weight (most abundant/longest-lived isotopes) = 336.220 amu Computer time = 1.09 seconds Orbital eigenvalues (eV) -40.32276 -39.55854 -37.47289 -36.58467 -34.34303 -33.52180 -32.26204 -31.28479 -30.70215 -29.25919 -27.15322 -25.43548 -24.72841 -23.86324 -23.26719 -22.95715 -21.62599 -20.70359 -20.15178 -19.92832 -18.05763 -16.98106 -16.72613 -16.17732 -15.68736 -15.42889 -15.08502 -14.84426 -14.70055 -14.56247 -14.22385 -14.12511 -13.82860 -13.69100 -13.44644 -13.21400 -12.71059 -12.58176 -12.50134 -12.38664 -12.29227 -11.88169 -11.52673 -11.41234 -11.36983 -11.21492 -11.01855 -10.89806 -10.80268 -10.74575 -10.43184 -10.41226 -10.21451 -10.16902 -10.02230 -9.92382 -9.78154 -9.62522 -9.39555 -8.91815 -8.82974 -8.40009 -6.67606 -5.79862 -3.22258 2.66331 3.29921 3.40579 3.45464 3.48474 3.74786 4.17614 4.45874 4.53308 4.62990 4.69786 4.97906 4.99749 5.09588 5.14287 5.18618 5.24324 5.27085 5.37597 5.42548 5.45853 5.47702 5.51245 5.57571 5.62248 5.70456 5.72894 5.77045 5.80299 5.84509 5.90191 5.93551 5.94636 6.01546 6.16182 6.17523 6.21727 6.23835 6.37532 6.51488 6.64512 6.68075 6.74943 6.83885 6.93900 6.99725 7.28771 7.49736 7.61393 7.77112 7.82113 8.42431 8.50281 9.20627 9.82582 10.38323 11.28738 Molecular weight = 336.22amu Principal moments of inertia in cm(-1) A = 0.009669 B = 0.003801 C = 0.002978 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 2895.263907 B = 7365.641704 C = 9399.274021 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.150 4.150 2 C -0.095 4.095 3 C -0.119 4.119 4 H 0.118 0.882 5 C -0.151 4.151 6 C -0.189 4.189 7 H 0.120 0.880 8 C 0.539 3.461 9 O -0.537 6.537 10 N -0.720 5.720 11 C 0.124 3.876 12 H 0.089 0.911 13 C 0.142 3.858 14 N -0.583 5.583 15 C -0.251 4.251 16 H 0.066 0.934 17 C 0.006 3.994 18 N -0.903 5.903 19 Si 0.901 3.099 20 H -0.282 1.282 21 H -0.291 1.291 22 H -0.283 1.283 23 C 0.183 3.817 24 C -0.077 4.077 25 C -0.140 4.140 26 C 0.062 3.938 27 O -0.388 6.388 28 C 0.059 3.941 29 C -0.134 4.134 30 C -0.109 4.109 31 H 0.055 0.945 32 H 0.054 0.946 33 H 0.057 0.943 34 H 0.063 0.937 35 H 0.068 0.932 36 H 0.098 0.902 37 H 0.101 0.899 38 H 0.394 0.606 39 H 0.016 0.984 40 H 0.057 0.943 41 H 0.254 0.746 42 H 0.019 0.981 43 H 0.091 0.909 44 H 0.068 0.932 45 H 0.072 0.928 46 H 0.045 0.955 47 H 0.085 0.915 48 H 0.085 0.915 49 H 0.044 0.956 50 H 0.068 0.932 51 H 0.084 0.916 52 H 0.054 0.946 53 H 0.060 0.940 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -3.385 -8.778 -16.656 19.130 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 -0.207 4.207 2 C -0.132 4.132 3 C -0.137 4.137 4 H 0.136 0.864 5 C -0.188 4.188 6 C -0.210 4.210 7 H 0.138 0.862 8 C 0.324 3.676 9 O -0.414 6.414 10 N -0.369 5.369 11 C 0.019 3.981 12 H 0.107 0.893 13 C 0.014 3.986 14 N -0.305 5.305 15 C -0.381 4.381 16 H 0.083 0.917 17 C -0.193 4.193 18 N -0.547 5.547 19 Si 0.731 3.269 20 H -0.209 1.209 21 H -0.217 1.217 22 H -0.209 1.209 23 C 0.057 3.943 24 C -0.080 4.080 25 C -0.178 4.178 26 C -0.015 4.015 27 O -0.307 6.307 28 C -0.017 4.017 29 C -0.171 4.171 30 C -0.147 4.147 31 H 0.074 0.926 32 H 0.073 0.927 33 H 0.076 0.924 34 H 0.082 0.918 35 H 0.086 0.914 36 H 0.116 0.884 37 H 0.119 0.881 38 H 0.227 0.773 39 H 0.034 0.966 40 H 0.076 0.924 41 H 0.064 0.936 42 H 0.037 0.963 43 H 0.109 0.891 44 H 0.087 0.913 45 H 0.091 0.909 46 H 0.063 0.937 47 H 0.103 0.897 48 H 0.103 0.897 49 H 0.062 0.938 50 H 0.087 0.913 51 H 0.102 0.898 52 H 0.072 0.928 53 H 0.079 0.921 Dipole moment (debyes) X Y Z Total from point charges -3.811 -7.970 -16.184 18.438 hybrid contribution 0.084 -0.090 0.655 0.666 sum -3.727 -8.060 -15.529 17.888 Atomic orbital electron populations 1.21740 0.95237 1.01525 1.02209 1.21150 0.96253 0.93744 1.02042 1.22464 0.91668 0.98612 1.00976 0.86389 1.23077 1.02448 1.02995 0.90307 1.22333 0.97627 0.99193 1.01862 0.86162 1.19590 0.82554 0.85505 0.79907 1.90720 1.53856 1.48401 1.48411 1.46063 1.06605 1.28920 1.55349 1.21802 0.95404 0.87330 0.93550 0.89294 1.21203 0.97778 0.90497 0.89147 1.43919 1.20756 1.32508 1.33330 1.19142 0.90492 1.30891 0.97546 0.91665 1.25005 0.95999 1.01378 0.96901 1.70017 1.06872 1.44099 1.33740 0.86386 0.78639 0.81350 0.80550 1.20863 1.21651 1.20919 1.20838 0.86613 0.99564 0.87248 1.21177 0.93426 0.93324 1.00062 1.22139 0.97700 1.01848 0.96156 1.22563 0.92425 0.90408 0.96074 1.87860 1.18663 1.38507 1.85704 1.22668 0.83685 0.99904 0.95477 1.22110 1.01388 0.98642 0.94977 1.21801 0.95729 0.98409 0.98761 0.92592 0.92719 0.92382 0.91809 0.91380 0.88403 0.88052 0.77255 0.96566 0.92399 0.93595 0.96310 0.89079 0.91313 0.90883 0.93677 0.89719 0.89691 0.93798 0.91317 0.89807 0.92780 0.92112 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 17. 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 -1.14 9.87 37.16 0.37 -0.78 16 2 C -0.09 -0.78 6.21 -26.73 -0.17 -0.94 16 3 C -0.12 -1.24 5.25 -90.62 -0.48 -1.71 16 4 H 0.12 1.49 7.60 -51.93 -0.39 1.10 16 5 C -0.15 -1.39 9.88 -26.73 -0.26 -1.66 16 6 C -0.19 -2.06 5.91 -91.77 -0.54 -2.60 16 7 H 0.12 1.05 8.14 -51.93 -0.42 0.63 16 8 C 0.54 8.14 7.58 -10.98 -0.08 8.06 16 9 O -0.54 -10.53 15.92 5.55 0.09 -10.44 16 10 N -0.72 -10.11 5.08 -53.67 -0.27 -10.38 16 11 C 0.12 2.15 2.27 -67.80 -0.15 2.00 16 12 H 0.09 1.77 5.73 -51.93 -0.30 1.47 16 13 C 0.14 3.02 6.09 -3.70 -0.02 2.99 16 14 N -0.58 -14.24 2.51 -172.36 -0.43 -14.67 16 15 C -0.25 -6.89 9.58 -15.06 -0.14 -7.03 16 16 H 0.07 1.82 7.88 -52.49 -0.41 1.40 16 17 C 0.01 0.16 4.92 -17.43 -0.09 0.07 16 18 N -0.90 -25.79 11.19 55.49 0.62 -25.17 16 19 Si 0.90 21.92 29.59 -169.99 -5.03 16.89 16 20 H -0.28 -6.85 7.11 56.52 0.40 -6.45 16 21 H -0.29 -7.09 7.11 56.52 0.40 -6.69 16 22 H -0.28 -6.84 7.11 56.52 0.40 -6.44 16 23 C 0.18 4.14 3.97 -3.76 -0.01 4.13 16 24 C -0.08 -1.36 0.51 -154.39 -0.08 -1.44 16 25 C -0.14 -2.15 4.92 -26.61 -0.13 -2.28 16 26 C 0.06 0.85 6.57 37.21 0.24 1.09 16 27 O -0.39 -6.18 10.76 -35.23 -0.38 -6.56 16 28 C 0.06 0.91 6.57 37.22 0.24 1.16 16 29 C -0.13 -2.42 4.49 -26.63 -0.12 -2.54 16 30 C -0.11 -1.69 3.63 -26.74 -0.10 -1.79 16 31 H 0.05 0.41 8.14 -51.93 -0.42 -0.02 16 32 H 0.05 0.36 8.14 -51.93 -0.42 -0.07 16 33 H 0.06 0.48 8.14 -51.93 -0.42 0.06 16 34 H 0.06 0.44 7.88 -51.92 -0.41 0.03 16 35 H 0.07 0.57 8.14 -51.93 -0.42 0.15 16 36 H 0.10 0.99 8.14 -51.93 -0.42 0.57 16 37 H 0.10 0.71 8.03 -51.93 -0.42 0.29 16 38 H 0.39 4.28 8.60 -40.82 -0.35 3.93 16 39 H 0.02 0.35 8.14 -51.93 -0.42 -0.07 16 40 H 0.06 1.35 7.93 -51.93 -0.41 0.94 16 41 H 0.25 7.07 8.31 -40.82 -0.34 6.73 16 42 H 0.02 0.45 8.14 -51.93 -0.42 0.03 16 43 H 0.09 2.35 6.07 -51.93 -0.32 2.04 16 44 H 0.07 0.97 8.14 -51.92 -0.42 0.55 16 45 H 0.07 1.20 8.14 -51.93 -0.42 0.78 16 46 H 0.05 0.56 6.59 -51.93 -0.34 0.22 16 47 H 0.08 0.99 8.14 -51.93 -0.42 0.57 16 48 H 0.08 1.22 8.14 -51.93 -0.42 0.80 16 49 H 0.04 0.65 6.64 -51.93 -0.35 0.30 16 50 H 0.07 1.35 8.14 -51.93 -0.42 0.93 16 51 H 0.08 1.69 5.94 -51.93 -0.31 1.38 16 52 H 0.05 0.75 5.03 -51.93 -0.26 0.49 16 53 H 0.06 0.90 8.14 -51.93 -0.42 0.48 16 LS Contribution 400.84 15.07 6.04 6.04 Total: -1.00 -31.22 400.84 -10.21 -41.43 By element: Atomic # 1 Polarization: 15.46 SS G_CDS: -9.32 Total: 6.14 kcal Atomic # 6 Polarization: -1.75 SS G_CDS: -1.52 Total: -3.28 kcal Atomic # 7 Polarization: -50.14 SS G_CDS: -0.08 Total: -50.23 kcal Atomic # 8 Polarization: -16.71 SS G_CDS: -0.29 Total: -17.00 kcal Atomic # 14 Polarization: 21.92 SS G_CDS: -5.03 Total: 16.89 kcal Total LS contribution 6.04 Total: 6.04 kcal Total: -31.22 -10.21 -41.43 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. ZINC001089956749.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 -10.714 kcal (2) G-P(sol) polarization free energy of solvation -31.221 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -41.935 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -10.209 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -41.430 kcal (6) G-S(sol) free energy of system = (1) + (5) -52.144 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 1.09 seconds