Wall clock time and date at job start Wed Apr 1 2020 02:10:58 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 1.50700 * 1 3 3 C 1.38254 * 119.99939 * 2 1 4 4 C 1.38214 * 120.00300 * 180.27245 * 3 2 1 5 5 C 1.38270 * 119.99454 * 359.74514 * 4 3 2 6 6 C 1.38211 * 119.99935 * 359.97438 * 5 4 3 7 7 C 1.38214 * 120.00174 * 179.74258 * 2 1 3 8 8 C 1.50699 * 119.99724 * 0.02562 * 7 2 1 9 9 H 1.09005 * 115.56397 * 334.03409 * 8 7 2 10 10 C 1.53008 * 117.49864 * 188.34869 * 8 7 2 11 11 C 1.53004 * 59.99991 * 252.50988 * 10 8 7 12 12 H 1.09000 * 117.49734 * 107.50802 * 11 10 8 13 13 C 1.50692 * 117.49887 * 252.51241 * 11 10 8 14 14 O 1.21283 * 120.00484 * 68.60433 * 13 11 10 15 15 N 1.34784 * 119.99748 * 248.60501 * 13 11 10 16 16 C 1.47017 * 125.64909 * 0.04602 * 15 13 11 17 17 C 1.54318 * 107.27230 * 178.90166 * 16 15 13 18 18 C 1.55151 * 102.94375 * 337.80338 * 17 16 15 19 19 H 1.08998 * 111.00631 * 277.43091 * 18 17 16 20 20 C 1.53000 * 111.00550 * 153.57418 * 18 17 16 21 21 C 1.53000 * 109.47023 * 72.80830 * 20 18 17 22 22 N 1.46502 * 109.47051 * 180.02562 * 21 20 18 23 23 C 1.36939 * 119.99860 * 180.02562 * 22 21 20 24 24 H 1.08001 * 120.00147 * 359.97438 * 23 22 21 25 25 C 1.38817 * 120.00057 * 179.97438 * 23 22 21 26 26 N 1.31614 * 120.00243 * 179.97438 * 25 23 22 27 27 Si 1.86795 * 119.99824 * 359.97438 * 25 23 22 28 28 H 1.48505 * 109.47443 * 90.00218 * 27 25 23 29 29 H 1.48496 * 109.47178 * 209.99943 * 27 25 23 30 30 H 1.48504 * 109.47385 * 330.00285 * 27 25 23 31 31 C 1.47421 * 125.64598 * 179.97438 * 15 13 11 32 32 H 1.08994 * 109.47277 * 270.25729 * 1 2 3 33 33 H 1.09005 * 109.46875 * 30.25318 * 1 2 3 34 34 H 1.08998 * 109.46915 * 150.25517 * 1 2 3 35 35 H 1.08000 * 120.00633 * 0.04118 * 3 2 1 36 36 H 1.07996 * 120.00486 * 179.77219 * 4 3 2 37 37 H 1.07999 * 119.99585 * 179.97438 * 5 4 3 38 38 H 1.07993 * 119.99872 * 179.97438 * 6 5 4 39 39 H 1.08995 * 117.49813 * 145.01863 * 10 8 7 40 40 H 1.09000 * 117.49545 * 359.97438 * 10 8 7 41 41 H 1.09000 * 109.88045 * 298.31928 * 16 15 13 42 42 H 1.09004 * 109.88579 * 59.32785 * 16 15 13 43 43 H 1.08998 * 110.72193 * 219.44087 * 17 16 15 44 44 H 1.09005 * 110.72093 * 96.16887 * 17 16 15 45 45 H 1.09005 * 109.47214 * 192.80295 * 20 18 17 46 46 H 1.08999 * 109.47132 * 312.80464 * 20 18 17 47 47 H 1.08996 * 109.46900 * 299.99826 * 21 20 18 48 48 H 1.08999 * 109.47466 * 59.99838 * 21 20 18 49 49 H 0.96999 * 120.00297 * 359.97438 * 22 21 20 50 50 H 0.97002 * 120.00393 * 179.97438 * 26 25 23 51 51 H 1.09001 * 110.36853 * 85.33281 * 31 15 13 52 52 H 1.09003 * 110.37387 * 323.00289 * 31 15 13 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 1.1973 0.0000 4 6 3.5804 1.1974 -0.0057 5 6 4.2717 -0.0001 -0.0061 6 6 3.5806 -1.1970 -0.0002 7 6 2.1981 -1.1969 0.0054 8 6 1.4446 -2.5020 0.0107 9 1 0.4436 -2.4655 0.4407 10 6 2.2542 -3.7844 0.2135 11 6 1.6746 -3.4554 -1.1638 12 1 2.3710 -3.1389 -1.9403 13 6 0.5000 -4.2718 -1.6375 14 8 -0.5769 -4.1591 -1.0910 15 7 0.6460 -5.1274 -2.6686 16 6 1.8892 -5.3625 -3.4175 17 6 1.5866 -6.4383 -4.4817 18 6 0.3398 -7.1582 -3.9033 19 1 0.6283 -7.9088 -3.1675 20 6 -0.5002 -7.7822 -5.0195 21 6 0.2210 -9.0125 -5.5736 22 7 -0.5831 -9.6096 -6.6428 23 6 -0.1360 -10.7295 -7.2917 24 1 0.8095 -11.1724 -7.0155 25 6 -0.8981 -11.2957 -8.3045 26 7 -0.4682 -12.3718 -8.9285 27 14 -2.5338 -10.5301 -8.7817 28 1 -2.3155 -9.5211 -9.8492 29 1 -3.4488 -11.5880 -9.2802 30 1 -3.1375 -9.8723 -7.5950 31 6 -0.4140 -5.9836 -3.2314 32 1 -0.3633 0.0046 1.0276 33 1 -0.3633 0.8878 -0.5178 34 1 -0.3633 -0.8923 -0.5099 35 1 1.6584 2.1327 0.0007 36 1 4.1204 2.1327 -0.0094 37 1 5.3517 0.0000 -0.0109 38 1 4.1206 -2.1322 -0.0009 39 1 1.7858 -4.5914 0.7769 40 1 3.3318 -3.6841 0.3427 41 1 2.2094 -4.4406 -3.9030 42 1 2.6682 -5.7152 -2.7416 43 1 2.4222 -7.1315 -4.5777 44 1 1.3547 -5.9768 -5.4416 45 1 -1.4708 -8.0786 -4.6215 46 1 -0.6420 -7.0538 -5.8179 47 1 1.1915 -8.7161 -5.9716 48 1 0.3628 -9.7408 -4.7752 49 1 -1.4324 -9.2121 -6.8906 50 1 -1.0009 -12.7676 -9.6359 51 1 -0.9939 -5.4324 -3.9716 52 1 -1.0636 -6.3540 -2.4383 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 ZINC001272591721.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 02:10:58 Heat of formation + Delta-G solvation = 18.517254 kcal Electronic energy + Delta-G solvation = -28519.162994 eV Core-core repulsion = 24677.001145 eV Total energy + Delta-G solvation = -3842.161849 eV No. of doubly occupied orbitals = 65 Molecular weight (most abundant/longest-lived isotopes) = 342.205 amu Computer time = 1.21 seconds Orbital eigenvalues (eV) -40.80565 -39.84588 -38.24137 -36.50671 -35.34848 -33.23560 -33.03080 -31.25554 -30.91210 -29.74316 -28.06452 -27.25130 -25.14515 -24.34440 -23.24533 -22.80704 -21.81066 -21.32815 -20.58035 -20.30040 -19.20300 -17.86001 -17.56476 -16.86793 -16.31751 -16.03042 -15.48520 -15.25688 -14.83554 -14.71400 -14.51066 -14.19606 -14.16265 -13.89349 -13.64093 -13.45168 -13.22048 -12.99053 -12.81930 -12.68285 -12.62940 -12.53733 -12.29388 -12.26445 -11.81242 -11.63294 -11.54548 -11.31597 -11.29115 -11.06541 -10.89500 -10.84125 -10.71243 -10.52297 -10.42618 -10.12842 -10.05545 -9.59634 -9.16058 -8.89691 -8.86950 -8.82770 -7.23493 -5.77321 -3.12827 0.88830 0.99565 2.24169 2.68676 3.22306 3.37364 3.40268 3.45258 3.65517 4.00442 4.25806 4.36889 4.41348 4.44374 4.52197 4.53273 4.58947 4.64743 4.68821 4.73645 4.81292 4.94706 5.02105 5.14196 5.20325 5.23069 5.28814 5.30448 5.31902 5.45716 5.46788 5.49173 5.50670 5.57788 5.65874 5.68856 5.69604 5.74491 5.81275 5.83335 5.95276 5.98953 6.09650 6.12060 6.12655 6.13518 6.28649 6.28751 6.61479 6.71608 6.75822 7.29327 7.93559 7.99052 8.41767 9.21153 9.93664 10.13397 11.41087 Molecular weight = 342.20amu Principal moments of inertia in cm(-1) A = 0.025796 B = 0.001636 C = 0.001607 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1085.158162 B =17106.145673 C =17422.189717 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.122 4.122 2 C -0.073 4.073 3 C -0.120 4.120 4 C -0.120 4.120 5 C -0.124 4.124 6 C -0.116 4.116 7 C -0.055 4.055 8 C -0.084 4.084 9 H 0.129 0.871 10 C -0.143 4.143 11 C -0.173 4.173 12 H 0.124 0.876 13 C 0.558 3.442 14 O -0.542 6.542 15 N -0.613 5.613 16 C 0.100 3.900 17 C -0.128 4.128 18 C -0.094 4.094 19 H 0.087 0.913 20 C -0.120 4.120 21 C 0.159 3.841 22 N -0.758 5.758 23 C -0.245 4.245 24 H 0.090 0.910 25 C 0.003 3.997 26 N -0.934 5.934 27 Si 0.885 3.115 28 H -0.284 1.284 29 H -0.291 1.291 30 H -0.277 1.277 31 C 0.109 3.891 32 H 0.072 0.928 33 H 0.066 0.934 34 H 0.074 0.926 35 H 0.122 0.878 36 H 0.121 0.879 37 H 0.122 0.878 38 H 0.124 0.876 39 H 0.105 0.895 40 H 0.109 0.891 41 H 0.067 0.933 42 H 0.070 0.930 43 H 0.088 0.912 44 H 0.081 0.919 45 H 0.066 0.934 46 H 0.065 0.935 47 H 0.028 0.972 48 H 0.025 0.975 49 H 0.361 0.639 50 H 0.259 0.741 51 H 0.070 0.930 52 H 0.078 0.922 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges 9.282 28.081 21.060 36.307 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 -0.178 4.178 2 C -0.073 4.073 3 C -0.138 4.138 4 C -0.138 4.138 5 C -0.142 4.142 6 C -0.133 4.133 7 C -0.055 4.055 8 C -0.102 4.102 9 H 0.147 0.853 10 C -0.181 4.181 11 C -0.194 4.194 12 H 0.142 0.858 13 C 0.346 3.654 14 O -0.420 6.420 15 N -0.347 5.347 16 C -0.023 4.023 17 C -0.166 4.166 18 C -0.113 4.113 19 H 0.106 0.894 20 C -0.158 4.158 21 C 0.032 3.968 22 N -0.404 5.404 23 C -0.375 4.375 24 H 0.107 0.893 25 C -0.192 4.192 26 N -0.582 5.582 27 Si 0.716 3.284 28 H -0.211 1.211 29 H -0.217 1.217 30 H -0.203 1.203 31 C -0.013 4.013 32 H 0.090 0.910 33 H 0.085 0.915 34 H 0.093 0.907 35 H 0.140 0.860 36 H 0.139 0.861 37 H 0.140 0.860 38 H 0.142 0.858 39 H 0.124 0.876 40 H 0.127 0.873 41 H 0.085 0.915 42 H 0.088 0.912 43 H 0.106 0.894 44 H 0.099 0.901 45 H 0.084 0.916 46 H 0.084 0.916 47 H 0.046 0.954 48 H 0.043 0.957 49 H 0.193 0.807 50 H 0.069 0.931 51 H 0.088 0.912 52 H 0.097 0.903 Dipole moment (debyes) X Y Z Total from point charges 8.841 27.995 21.339 36.294 hybrid contribution -1.003 0.436 -0.629 1.262 sum 7.838 28.432 20.710 36.038 Atomic orbital electron populations 1.20883 0.91000 1.03345 1.02586 1.19764 0.96261 0.92330 0.98937 1.21046 0.94304 0.97422 1.01016 1.21156 0.94308 0.98124 1.00168 1.21109 0.99877 0.92409 1.00812 1.21054 0.93489 0.98382 1.00421 1.18972 0.93006 0.92643 1.00856 1.21101 1.00928 0.87915 1.00300 0.85350 1.23145 1.00413 0.98881 0.95620 1.22307 1.00113 1.03242 0.93727 0.85787 1.19238 0.88678 0.78901 0.78543 1.90702 1.27952 1.66831 1.56516 1.48412 1.12625 1.41079 1.32566 1.22115 0.86723 0.99304 0.94134 1.22759 0.99022 0.96889 0.97900 1.22321 0.95185 0.95976 0.97864 0.89449 1.21723 0.99005 0.98409 0.96668 1.20602 0.93923 0.91709 0.90598 1.42727 1.22748 1.33037 1.41839 1.19068 1.04681 1.01517 1.12220 0.89250 1.24683 0.98425 0.97506 0.98618 1.69701 1.38976 1.22539 1.27031 0.86531 0.85006 0.78583 0.78305 1.21085 1.21718 1.20325 1.22358 0.90394 0.90723 0.97818 0.90984 0.91525 0.90689 0.85996 0.86099 0.86025 0.85830 0.87635 0.87312 0.91476 0.91177 0.89374 0.90082 0.91551 0.91598 0.95431 0.95674 0.80700 0.93067 0.91197 0.90340 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 -0.89 9.33 36.01 0.34 -0.56 16 2 C -0.07 -0.60 5.88 -104.62 -0.62 -1.21 16 3 C -0.12 -0.87 9.70 -39.58 -0.38 -1.25 16 4 C -0.12 -0.80 10.05 -39.58 -0.40 -1.19 16 5 C -0.12 -0.83 10.05 -39.58 -0.40 -1.22 16 6 C -0.12 -0.83 9.30 -39.59 -0.37 -1.20 16 7 C -0.05 -0.45 5.61 -104.63 -0.59 -1.04 16 8 C -0.08 -0.72 4.65 -91.77 -0.43 -1.15 16 9 H 0.13 1.26 6.44 -51.93 -0.33 0.92 16 10 C -0.14 -1.03 9.56 -26.72 -0.26 -1.28 16 11 C -0.17 -1.50 5.17 -91.77 -0.47 -1.98 16 12 H 0.12 0.93 7.74 -51.93 -0.40 0.53 16 13 C 0.56 6.63 7.63 -10.99 -0.08 6.54 16 14 O -0.54 -8.30 16.51 5.55 0.09 -8.21 16 15 N -0.61 -6.67 3.33 -170.54 -0.57 -7.24 16 16 C 0.10 0.84 6.28 -3.07 -0.02 0.82 16 17 C -0.13 -1.21 5.90 -24.90 -0.15 -1.36 16 18 C -0.09 -1.05 3.00 -88.48 -0.27 -1.31 16 19 H 0.09 0.98 8.14 -51.93 -0.42 0.56 16 20 C -0.12 -1.68 4.84 -26.73 -0.13 -1.81 16 21 C 0.16 2.92 6.16 -4.04 -0.02 2.90 16 22 N -0.76 -17.94 5.41 -59.91 -0.32 -18.26 16 23 C -0.24 -6.96 10.47 -15.06 -0.16 -7.12 16 24 H 0.09 2.71 8.06 -52.49 -0.42 2.28 16 25 C 0.00 0.10 5.50 -17.43 -0.10 0.00 16 26 N -0.93 -29.42 13.97 55.49 0.78 -28.64 16 27 Si 0.89 22.15 27.73 -169.99 -4.71 17.44 16 28 H -0.28 -7.04 7.11 56.52 0.40 -6.63 16 29 H -0.29 -7.37 7.11 56.52 0.40 -6.97 16 30 H -0.28 -6.52 6.52 56.52 0.37 -6.15 16 31 C 0.11 1.25 6.38 -2.54 -0.02 1.24 16 32 H 0.07 0.47 8.14 -51.93 -0.42 0.05 16 33 H 0.07 0.41 8.09 -51.93 -0.42 -0.01 16 34 H 0.07 0.64 6.65 -51.93 -0.35 0.30 16 35 H 0.12 0.67 8.06 -52.49 -0.42 0.25 16 36 H 0.12 0.56 8.06 -52.49 -0.42 0.14 16 37 H 0.12 0.57 8.06 -52.49 -0.42 0.15 16 38 H 0.12 0.68 6.02 -52.49 -0.32 0.36 16 39 H 0.11 0.80 8.14 -51.93 -0.42 0.37 16 40 H 0.11 0.56 6.18 -51.93 -0.32 0.24 16 41 H 0.07 0.49 8.06 -51.93 -0.42 0.07 16 42 H 0.07 0.50 8.14 -51.93 -0.42 0.08 16 43 H 0.09 0.80 8.14 -51.93 -0.42 0.37 16 44 H 0.08 0.79 7.91 -51.93 -0.41 0.38 16 45 H 0.07 0.95 8.14 -51.93 -0.42 0.52 16 46 H 0.07 0.91 7.97 -51.93 -0.41 0.49 16 47 H 0.03 0.50 7.75 -51.93 -0.40 0.10 16 48 H 0.03 0.48 8.14 -51.93 -0.42 0.05 16 49 H 0.36 8.32 5.53 -40.82 -0.23 8.09 16 50 H 0.26 7.76 8.31 -40.82 -0.34 7.42 16 51 H 0.07 0.81 8.04 -51.93 -0.42 0.39 16 52 H 0.08 0.97 8.04 -51.93 -0.42 0.55 16 LS Contribution 415.10 15.07 6.26 6.26 Total: -1.00 -34.26 415.10 -11.66 -45.92 By element: Atomic # 1 Polarization: 13.59 SS G_CDS: -8.66 Total: 4.92 kcal Atomic # 6 Polarization: -7.67 SS G_CDS: -4.51 Total: -12.18 kcal Atomic # 7 Polarization: -54.03 SS G_CDS: -0.12 Total: -54.15 kcal Atomic # 8 Polarization: -8.30 SS G_CDS: 0.09 Total: -8.21 kcal Atomic # 14 Polarization: 22.15 SS G_CDS: -4.71 Total: 17.44 kcal Total LS contribution 6.26 Total: 6.26 kcal Total: -34.26 -11.66 -45.92 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. ZINC001272591721.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 64.438 kcal (2) G-P(sol) polarization free energy of solvation -34.262 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system 30.175 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -11.658 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -45.920 kcal (6) G-S(sol) free energy of system = (1) + (5) 18.517 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 1.22 seconds