Wall clock time and date at job start Sat Apr 11 2020 06:12:59 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 O 1.42904 * 1 3 3 C 1.42893 * 114.00145 * 2 1 4 4 C 1.52998 * 109.47152 * 180.02562 * 3 2 1 5 5 C 1.53000 * 109.47326 * 185.57814 * 4 3 2 6 6 N 1.46501 * 109.46149 * 62.74331 * 5 4 3 7 7 C 1.34774 * 119.99633 * 61.20699 * 6 5 4 8 8 O 1.21278 * 120.00651 * 4.67740 * 7 6 5 9 9 C 1.50699 * 119.99474 * 184.67670 * 7 6 5 10 10 H 1.08997 * 110.43790 * 348.95225 * 9 7 6 11 11 C 1.54815 * 110.48681 * 226.41102 * 9 7 6 12 12 C 1.55232 * 101.98731 * 220.52059 * 11 9 7 13 13 O 1.44380 * 103.56620 * 36.87957 * 12 11 9 14 14 C 1.43753 * 106.97514 * 320.01094 * 13 12 11 15 15 H 1.08996 * 110.00606 * 267.02309 * 14 13 12 16 16 C 1.53004 * 109.87650 * 145.93617 * 14 13 12 17 17 C 1.53041 * 109.45999 * 182.71886 * 5 4 3 18 18 C 1.53188 * 109.31220 * 181.37004 * 17 5 4 19 19 N 1.46930 * 108.77798 * 305.36264 * 18 17 5 20 20 C 1.36932 * 120.63532 * 233.58623 * 19 18 17 21 21 H 1.08007 * 120.00402 * 151.12590 * 20 19 18 22 22 C 1.38820 * 119.99764 * 331.12812 * 20 19 18 23 23 N 1.31613 * 120.00091 * 334.26239 * 22 20 19 24 24 Si 1.86796 * 119.99752 * 154.26060 * 22 20 19 25 25 H 1.48498 * 109.47575 * 0.02562 * 24 22 20 26 26 H 1.48498 * 109.47331 * 239.99992 * 24 22 20 27 27 H 1.48496 * 109.47139 * 120.00154 * 24 22 20 28 28 C 1.46931 * 118.73423 * 53.86089 * 19 18 17 29 29 C 1.53047 * 109.44552 * 302.77698 * 5 4 3 30 30 H 1.09000 * 109.46990 * 300.00256 * 1 2 3 31 31 H 1.08998 * 109.47111 * 59.99831 * 1 2 3 32 32 H 1.08995 * 109.47321 * 180.02562 * 1 2 3 33 33 H 1.08998 * 109.47364 * 60.00045 * 3 2 1 34 34 H 1.09000 * 109.46800 * 299.99653 * 3 2 1 35 35 H 1.09008 * 109.47570 * 65.57434 * 4 3 2 36 36 H 1.09004 * 109.47042 * 305.57716 * 4 3 2 37 37 H 0.96994 * 119.99529 * 241.20522 * 6 5 4 38 38 H 1.09000 * 110.90600 * 338.63681 * 11 9 7 39 39 H 1.08997 * 110.91063 * 102.24723 * 11 9 7 40 40 H 1.09004 * 110.51650 * 278.38407 * 12 11 9 41 41 H 1.09001 * 110.77875 * 155.49633 * 12 11 9 42 42 H 1.08996 * 109.47325 * 306.28759 * 16 14 13 43 43 H 1.09003 * 109.46593 * 66.29111 * 16 14 13 44 44 H 1.09002 * 109.46831 * 186.28482 * 16 14 13 45 45 H 1.09005 * 109.49987 * 61.42099 * 17 5 4 46 46 H 1.08992 * 109.49903 * 301.31745 * 17 5 4 47 47 H 1.09001 * 109.58977 * 185.57596 * 18 17 5 48 48 H 1.09003 * 109.58898 * 65.14894 * 18 17 5 49 49 H 0.97002 * 120.00188 * 354.85051 * 23 22 20 50 50 H 1.08991 * 109.58712 * 65.92896 * 28 19 18 51 51 H 1.08998 * 109.58409 * 186.35392 * 28 19 18 52 52 H 1.09000 * 109.49674 * 298.57130 * 29 5 4 53 53 H 1.09003 * 109.49675 * 58.67144 * 29 5 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 8 1.4290 0.0000 0.0000 3 6 2.0103 1.3054 0.0000 4 6 3.5355 1.1845 -0.0006 5 6 4.1574 2.5754 0.1396 6 7 3.7689 3.1562 1.4272 7 6 4.1225 2.5462 2.5757 8 8 4.8335 1.5641 2.5468 9 6 3.6345 3.0844 3.8960 10 1 3.1785 4.0653 3.7619 11 6 4.7991 3.1628 4.9130 12 6 4.1176 2.6793 6.2213 13 8 3.2139 1.6472 5.7710 14 6 2.6319 2.1070 4.5396 15 1 1.6913 2.6197 4.7403 16 6 2.3886 0.9207 3.6044 17 6 5.6820 2.4615 0.0708 18 6 6.3023 3.8512 0.2458 19 7 5.7194 4.7584 -0.7523 20 6 6.5238 5.4824 -1.5911 21 1 6.1685 5.7622 -2.5720 22 6 7.7960 5.8569 -1.1809 23 7 8.0622 5.9874 0.1014 24 14 9.1302 6.1753 -2.4489 25 1 8.5794 5.9621 -3.8114 26 1 10.2628 5.2424 -2.2208 27 1 9.6090 7.5753 -2.3227 28 6 4.2570 4.8784 -0.8290 29 6 3.6595 3.4729 -0.9957 30 1 -0.3633 0.5139 0.8900 31 1 -0.3633 0.5138 -0.8900 32 1 -0.3634 -1.0276 0.0005 33 1 1.6887 1.8463 0.8900 34 1 1.6887 1.8462 -0.8900 35 1 3.8638 0.7324 -0.9366 36 1 3.8508 0.5596 0.8350 37 1 3.2572 3.9798 1.4530 38 1 5.6106 2.4936 4.6273 39 1 5.1585 4.1867 5.0148 40 1 3.5663 3.4950 6.6889 41 1 4.8543 2.2696 6.9124 42 1 3.3148 0.3596 3.4807 43 1 1.6248 0.2715 4.0325 44 1 2.0526 1.2861 2.6340 45 1 5.9730 2.0524 -0.8967 46 1 6.0338 1.8035 0.8653 47 1 7.3807 3.7911 0.0992 48 1 6.0877 4.2237 1.2475 49 1 7.3522 5.8954 0.7560 50 1 3.8791 5.3328 0.0868 51 1 3.9855 5.4962 -1.6849 52 1 3.9696 3.0543 -1.9531 53 1 2.5718 3.5348 -0.9602 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 ZINC001151374193.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 06:12:59 Heat of formation + Delta-G solvation = -107.828741 kcal Electronic energy + Delta-G solvation = -33263.850758 eV Core-core repulsion = 29136.212695 eV Total energy + Delta-G solvation = -4127.638064 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.220 amu Computer time = 1.35 seconds Orbital eigenvalues (eV) -40.96766 -39.35270 -37.82666 -37.22883 -34.81866 -32.85639 -31.80494 -31.65021 -31.34977 -30.26821 -28.73197 -26.63571 -26.31364 -24.85258 -23.13951 -22.90408 -22.27357 -22.12083 -20.53974 -19.79895 -18.81830 -17.50802 -17.20007 -16.61618 -16.51481 -16.05606 -15.77136 -15.35842 -15.12013 -14.84951 -14.56281 -14.29164 -14.08738 -13.77150 -13.53944 -13.43996 -13.23099 -13.01252 -12.72788 -12.66421 -12.27753 -12.21188 -12.01150 -11.76532 -11.74348 -11.57123 -11.29618 -11.17543 -11.14770 -11.00654 -10.96548 -10.72142 -10.66254 -10.47303 -10.20328 -10.07031 -9.93051 -9.84368 -9.66347 -9.34194 -9.07050 -8.71387 -8.36370 -6.88860 -6.09609 -3.25818 2.76415 3.30874 3.49766 3.52869 3.65795 3.68617 3.73310 4.39840 4.56213 4.57757 4.70583 4.91830 4.95829 5.02320 5.05725 5.11397 5.16358 5.20865 5.23245 5.25628 5.29117 5.33627 5.38820 5.41774 5.48116 5.49848 5.55213 5.65033 5.66781 5.80986 5.85676 5.89940 6.00048 6.02818 6.08360 6.17517 6.21800 6.31409 6.38030 6.50276 6.54260 6.66827 6.70916 6.77530 6.92651 7.08571 7.11378 7.22083 7.76079 8.00682 8.46357 8.56303 9.09624 9.82774 10.27993 11.18956 Molecular weight = 340.22amu Principal moments of inertia in cm(-1) A = 0.011026 B = 0.004213 C = 0.003256 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 2538.866954 B = 6644.765404 C = 8598.685618 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C 0.032 3.968 2 O -0.391 6.391 3 C 0.063 3.937 4 C -0.129 4.129 5 C 0.195 3.805 6 N -0.714 5.714 7 C 0.531 3.469 8 O -0.526 6.526 9 C -0.145 4.145 10 H 0.095 0.905 11 C -0.140 4.140 12 C 0.049 3.951 13 O -0.370 6.370 14 C 0.095 3.905 15 H 0.071 0.929 16 C -0.165 4.165 17 C -0.146 4.146 18 C 0.161 3.839 19 N -0.597 5.597 20 C -0.353 4.353 21 H 0.055 0.945 22 C -0.021 4.021 23 N -0.913 5.913 24 Si 1.067 2.933 25 H -0.292 1.292 26 H -0.290 1.290 27 H -0.294 1.294 28 C 0.149 3.851 29 C -0.141 4.141 30 H 0.038 0.962 31 H 0.039 0.961 32 H 0.083 0.917 33 H 0.047 0.953 34 H 0.049 0.951 35 H 0.075 0.925 36 H 0.089 0.911 37 H 0.396 0.604 38 H 0.094 0.906 39 H 0.085 0.915 40 H 0.060 0.940 41 H 0.095 0.905 42 H 0.085 0.915 43 H 0.058 0.942 44 H 0.068 0.932 45 H 0.062 0.938 46 H 0.080 0.920 47 H 0.074 0.926 48 H 0.014 0.986 49 H 0.268 0.732 50 H 0.012 0.988 51 H 0.057 0.943 52 H 0.077 0.923 53 H 0.056 0.944 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -15.412 -6.796 6.669 18.116 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 -0.065 4.065 2 O -0.310 6.310 3 C -0.013 4.013 4 C -0.167 4.167 5 C 0.109 3.891 6 N -0.365 5.365 7 C 0.317 3.683 8 O -0.402 6.402 9 C -0.167 4.167 10 H 0.113 0.887 11 C -0.178 4.178 12 C -0.027 4.027 13 O -0.289 6.289 14 C 0.037 3.963 15 H 0.089 0.911 16 C -0.222 4.222 17 C -0.186 4.186 18 C 0.036 3.964 19 N -0.321 5.321 20 C -0.482 4.482 21 H 0.072 0.928 22 C -0.224 4.224 23 N -0.553 5.553 24 Si 0.897 3.103 25 H -0.218 1.218 26 H -0.216 1.216 27 H -0.222 1.222 28 C 0.022 3.978 29 C -0.180 4.180 30 H 0.056 0.944 31 H 0.057 0.943 32 H 0.101 0.899 33 H 0.065 0.935 34 H 0.067 0.933 35 H 0.094 0.906 36 H 0.107 0.893 37 H 0.231 0.769 38 H 0.112 0.888 39 H 0.104 0.896 40 H 0.078 0.922 41 H 0.113 0.887 42 H 0.104 0.896 43 H 0.077 0.923 44 H 0.087 0.913 45 H 0.081 0.919 46 H 0.098 0.902 47 H 0.092 0.908 48 H 0.032 0.968 49 H 0.079 0.921 50 H 0.030 0.970 51 H 0.075 0.925 52 H 0.096 0.904 53 H 0.075 0.925 Dipole moment (debyes) X Y Z Total from point charges -13.218 -7.484 6.499 16.522 hybrid contribution -2.200 0.716 0.019 2.313 sum -15.418 -6.768 6.518 18.056 Atomic orbital electron populations 1.22701 0.81598 1.02452 0.99713 1.87900 1.19194 1.28505 1.95359 1.22662 0.94671 0.84195 0.99759 1.21961 0.92361 0.98089 1.04302 1.20181 0.95760 0.90992 0.82146 1.46202 1.56942 1.27800 1.05585 1.19926 0.79897 0.83722 0.84733 1.90628 1.36267 1.26407 1.86945 1.22802 0.98347 1.00666 0.94862 0.88661 1.23172 0.97794 1.03450 0.93378 1.23577 0.92057 0.90824 0.96273 1.88899 1.60209 1.41746 1.38025 1.22523 0.94377 0.94540 0.84856 0.91085 1.22254 1.03991 0.98047 0.97891 1.22483 0.92808 1.00962 1.02310 1.20808 0.98179 0.86594 0.90857 1.44137 0.99623 1.46918 1.41378 1.19976 0.99278 1.33411 0.95554 0.92762 1.25833 0.99517 0.97171 0.99854 1.70728 1.37223 1.45998 1.01318 0.83502 0.75904 0.76371 0.74482 1.21818 1.21642 1.22159 1.20932 0.86117 0.92510 0.98243 1.22483 0.98823 0.98733 0.97996 0.94373 0.94280 0.89873 0.93529 0.93313 0.90645 0.89254 0.76907 0.88759 0.89594 0.92200 0.88685 0.89586 0.92303 0.91308 0.91883 0.90186 0.90759 0.96776 0.92080 0.97037 0.92483 0.90427 0.92504 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 0.03 0.30 11.01 101.05 1.11 1.41 16 2 O -0.39 -5.14 10.70 -35.23 -0.38 -5.51 16 3 C 0.06 0.79 4.95 37.16 0.18 0.97 16 4 C -0.13 -1.88 4.49 -26.73 -0.12 -2.00 16 5 C 0.19 3.02 0.35 -131.77 -0.05 2.98 16 6 N -0.71 -9.98 3.34 -47.57 -0.16 -10.14 16 7 C 0.53 7.77 4.29 -10.99 -0.05 7.73 16 8 O -0.53 -9.31 10.61 5.56 0.06 -9.25 16 9 C -0.14 -1.73 3.45 -90.24 -0.31 -2.04 16 10 H 0.10 0.93 8.00 -51.93 -0.42 0.52 16 11 C -0.14 -1.67 6.67 -24.59 -0.16 -1.84 16 12 C 0.05 0.52 7.72 38.34 0.30 0.82 16 13 O -0.37 -4.87 11.19 -35.23 -0.39 -5.27 16 14 C 0.10 1.12 4.06 -26.15 -0.11 1.01 16 15 H 0.07 0.70 8.14 -51.93 -0.42 0.27 16 16 C -0.16 -2.08 8.37 37.16 0.31 -1.77 16 17 C -0.15 -2.82 4.64 -26.61 -0.12 -2.94 16 18 C 0.16 3.71 4.46 -3.71 -0.02 3.70 16 19 N -0.60 -14.16 2.83 -172.05 -0.49 -14.64 16 20 C -0.35 -9.58 9.47 -15.06 -0.14 -9.72 16 21 H 0.05 1.49 7.95 -52.48 -0.42 1.07 16 22 C -0.02 -0.59 4.65 -17.43 -0.08 -0.67 16 23 N -0.91 -26.99 12.49 55.49 0.69 -26.30 16 24 Si 1.07 25.15 29.99 -169.99 -5.10 20.05 16 25 H -0.29 -6.55 7.11 56.52 0.40 -6.15 16 26 H -0.29 -6.83 7.11 56.52 0.40 -6.42 16 27 H -0.29 -6.89 7.11 56.52 0.40 -6.49 16 28 C 0.15 2.82 6.26 -3.48 -0.02 2.80 16 29 C -0.14 -2.17 4.59 -26.38 -0.12 -2.29 16 30 H 0.04 0.32 8.14 -51.93 -0.42 -0.10 16 31 H 0.04 0.33 8.14 -51.93 -0.42 -0.10 16 32 H 0.08 0.66 8.14 -51.93 -0.42 0.24 16 33 H 0.05 0.55 5.71 -51.93 -0.30 0.25 16 34 H 0.05 0.57 6.67 -51.93 -0.35 0.22 16 35 H 0.07 1.12 8.14 -51.92 -0.42 0.70 16 36 H 0.09 1.48 6.35 -51.93 -0.33 1.15 16 37 H 0.40 4.90 7.19 -40.82 -0.29 4.61 16 38 H 0.09 1.35 7.28 -51.93 -0.38 0.97 16 39 H 0.09 0.92 8.14 -51.93 -0.42 0.50 16 40 H 0.06 0.52 8.14 -51.93 -0.42 0.10 16 41 H 0.09 0.89 8.14 -51.93 -0.42 0.47 16 42 H 0.09 1.32 6.40 -51.93 -0.33 0.99 16 43 H 0.06 0.68 8.14 -51.93 -0.42 0.26 16 44 H 0.07 0.84 5.16 -51.93 -0.27 0.57 16 45 H 0.06 1.26 8.14 -51.93 -0.42 0.83 16 46 H 0.08 1.62 5.97 -51.93 -0.31 1.31 16 47 H 0.07 1.99 6.41 -51.93 -0.33 1.66 16 48 H 0.01 0.34 7.48 -51.93 -0.39 -0.05 16 49 H 0.27 7.99 6.81 -40.82 -0.28 7.71 16 50 H 0.01 0.21 6.96 -51.93 -0.36 -0.15 16 51 H 0.06 1.10 7.93 -51.93 -0.41 0.69 16 52 H 0.08 1.27 8.14 -51.93 -0.42 0.85 16 53 H 0.06 0.71 6.43 -51.93 -0.33 0.38 16 LS Contribution 390.19 15.07 5.88 5.88 Total: -1.00 -31.96 390.19 -8.22 -40.18 By element: Atomic # 1 Polarization: 15.79 SS G_CDS: -8.94 Total: 6.85 kcal Atomic # 6 Polarization: -2.46 SS G_CDS: 0.60 Total: -1.85 kcal Atomic # 7 Polarization: -51.13 SS G_CDS: 0.05 Total: -51.08 kcal Atomic # 8 Polarization: -19.32 SS G_CDS: -0.71 Total: -20.03 kcal Atomic # 14 Polarization: 25.15 SS G_CDS: -5.10 Total: 20.05 kcal Total LS contribution 5.88 Total: 5.88 kcal Total: -31.96 -8.22 -40.18 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. ZINC001151374193.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 -67.651 kcal (2) G-P(sol) polarization free energy of solvation -31.957 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -99.608 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -8.221 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -40.178 kcal (6) G-S(sol) free energy of system = (1) + (5) -107.829 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 1.35 seconds