Wall clock time and date at job start Wed Apr 1 2020 02:12:55 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 1.50708 * 1 3 3 C 1.38257 * 119.99998 * 2 1 4 4 C 1.38214 * 119.99551 * 180.27966 * 3 2 1 5 5 C 1.38262 * 119.99971 * 359.74565 * 4 3 2 6 6 C 1.38209 * 120.00098 * 0.02562 * 5 4 3 7 7 C 1.38214 * 119.99598 * 179.76976 * 2 1 3 8 8 C 1.50705 * 120.00222 * 0.02562 * 7 2 1 9 9 H 1.08994 * 115.55786 * 334.03296 * 8 7 2 10 10 C 1.53001 * 117.49843 * 188.34847 * 8 7 2 11 11 C 1.52993 * 117.50005 * 119.72687 * 8 7 2 12 12 H 1.09000 * 117.52297 * 0.02562 * 11 8 7 13 13 C 1.50710 * 117.49557 * 214.97816 * 11 8 7 14 14 O 1.21276 * 120.00062 * 359.97438 * 13 11 8 15 15 N 1.34774 * 119.99719 * 179.97438 * 13 11 8 16 16 C 1.46505 * 119.99991 * 179.97438 * 15 13 11 17 17 C 1.52992 * 109.47416 * 180.02562 * 16 15 13 18 18 H 1.09004 * 109.49745 * 54.93239 * 17 16 15 19 19 C 1.53033 * 109.50056 * 174.99871 * 17 16 15 20 20 C 1.53044 * 109.54034 * 181.34702 * 19 17 16 21 21 C 1.53187 * 109.31375 * 298.63686 * 20 19 17 22 22 N 1.46926 * 108.77629 * 54.63309 * 21 20 19 23 23 C 1.36940 * 120.62975 * 126.36813 * 22 21 20 24 24 H 1.07994 * 119.99945 * 332.44875 * 23 22 21 25 25 C 1.38814 * 119.99741 * 152.45397 * 23 22 21 26 26 N 1.31619 * 120.00115 * 342.76707 * 25 23 22 27 27 Si 1.86800 * 119.99880 * 162.77431 * 25 23 22 28 28 H 1.48503 * 109.46486 * 269.99339 * 27 25 23 29 29 H 1.48503 * 109.47343 * 29.99225 * 27 25 23 30 30 H 1.48501 * 109.47322 * 149.99625 * 27 25 23 31 31 C 1.46930 * 118.73855 * 306.64256 * 22 21 20 32 32 H 1.09000 * 109.46896 * 270.23289 * 1 2 3 33 33 H 1.08997 * 109.46721 * 30.22655 * 1 2 3 34 34 H 1.08989 * 109.47212 * 150.23240 * 1 2 3 35 35 H 1.07989 * 120.00114 * 359.97438 * 3 2 1 36 36 H 1.08001 * 120.00169 * 179.73062 * 4 3 2 37 37 H 1.08004 * 119.99830 * 179.97438 * 5 4 3 38 38 H 1.08000 * 120.00048 * 179.97438 * 6 5 4 39 39 H 1.09000 * 117.49518 * 145.01625 * 10 8 7 40 40 H 1.09000 * 117.51803 * 359.97438 * 10 8 7 41 41 H 0.96996 * 120.00414 * 0.02562 * 15 13 11 42 42 H 1.09001 * 109.46944 * 60.00031 * 16 15 13 43 43 H 1.08999 * 109.46865 * 300.00176 * 16 15 13 44 44 H 1.09005 * 109.45815 * 61.33043 * 19 17 16 45 45 H 1.08993 * 109.46109 * 301.37333 * 19 17 16 46 46 H 1.09003 * 109.49377 * 178.68184 * 20 19 17 47 47 H 1.09002 * 109.51969 * 58.60509 * 20 19 17 48 48 H 1.09004 * 109.58464 * 294.84792 * 21 20 19 49 49 H 1.08998 * 109.58925 * 174.42372 * 21 20 19 50 50 H 0.96998 * 120.00327 * 180.02562 * 26 25 23 51 51 H 1.08997 * 109.58242 * 173.14315 * 31 22 21 52 52 H 1.08994 * 109.58811 * 293.56959 * 31 22 21 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 1.5071 0.0000 0.0000 3 6 2.1984 1.1973 0.0000 4 6 3.5805 1.1972 -0.0058 5 6 4.2717 -0.0002 -0.0064 6 6 3.5806 -1.1971 -0.0016 7 6 2.1981 -1.1970 0.0048 8 6 1.4445 -2.5021 0.0095 9 1 0.4436 -2.4657 0.4395 10 6 2.2540 -3.7846 0.2117 11 6 1.6745 -3.4548 -1.1653 12 1 2.3711 -3.1383 -1.9416 13 6 0.4997 -4.2712 -1.6394 14 8 -0.5770 -4.1587 -1.0927 15 7 0.6456 -5.1261 -2.6710 16 6 -0.4962 -5.9201 -3.1316 17 6 -0.0642 -6.8022 -4.3045 18 1 0.7945 -7.4052 -4.0093 19 6 -1.2202 -7.7214 -4.7054 20 6 -0.7780 -8.6276 -5.8567 21 6 -0.4047 -7.7646 -7.0661 22 7 0.6041 -6.7802 -6.6513 23 6 1.7893 -6.6684 -7.3281 24 1 2.1980 -7.5232 -7.8463 25 6 2.4654 -5.4562 -7.3479 26 7 1.8363 -4.3463 -7.0243 27 14 4.2681 -5.4001 -7.8342 28 1 5.1125 -5.5678 -6.6241 29 1 4.5562 -6.4956 -8.7945 30 1 4.5688 -4.0924 -8.4703 31 6 0.3196 -5.9223 -5.4929 32 1 -0.3633 0.0042 1.0277 33 1 -0.3633 0.8879 -0.5173 34 1 -0.3633 -0.8920 -0.5102 35 1 1.6584 2.1326 -0.0004 36 1 4.1206 2.1325 -0.0102 37 1 5.3517 -0.0003 -0.0114 38 1 4.1205 -2.1324 -0.0024 39 1 1.7856 -4.5918 0.7748 40 1 3.3317 -3.6847 0.3410 41 1 1.5068 -5.2163 -3.1081 42 1 -1.2962 -5.2533 -3.4533 43 1 -0.8535 -6.5494 -2.3165 44 1 -2.0702 -7.1179 -5.0242 45 1 -1.5099 -8.3340 -3.8517 46 1 -1.5942 -9.2980 -6.1261 47 1 0.0872 -9.2139 -5.5471 48 1 -1.2911 -7.2471 -7.4332 49 1 0.0042 -8.3971 -7.8541 50 1 2.3086 -3.4992 -7.0385 51 1 1.2063 -5.3397 -5.2433 52 1 -0.5064 -5.2515 -5.7291 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 ZINC000267151753.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 02:12:55 Heat of formation + Delta-G solvation = 15.451604 kcal Electronic energy + Delta-G solvation = -29729.147988 eV Core-core repulsion = 25886.853203 eV Total energy + Delta-G solvation = -3842.294786 eV No. of doubly occupied orbitals = 65 Molecular weight (most abundant/longest-lived isotopes) = 342.205 amu Computer time = 1.51 seconds Orbital eigenvalues (eV) -40.36252 -39.26247 -37.87193 -36.35036 -34.58045 -33.07692 -32.94611 -31.05367 -30.58540 -29.82989 -27.04144 -26.10273 -25.31079 -24.13168 -23.48268 -22.14262 -21.53841 -20.83849 -20.38214 -19.81901 -18.98539 -17.45536 -16.83829 -16.50392 -15.78746 -15.36864 -15.21969 -14.98322 -14.78845 -14.28037 -14.02724 -13.99117 -13.87057 -13.60961 -13.34941 -13.20009 -12.91184 -12.58142 -12.38238 -12.32573 -12.26450 -12.21082 -12.14703 -12.00585 -11.29317 -11.26689 -11.03521 -11.02076 -10.78957 -10.72359 -10.51587 -10.50847 -10.24461 -10.19509 -9.95433 -9.76743 -9.53780 -9.45386 -8.88706 -8.72470 -8.56836 -8.51699 -6.71260 -5.83116 -3.25616 1.16708 1.26494 2.68232 3.32771 3.34961 3.41034 3.42103 3.56632 3.98193 4.44759 4.46997 4.63162 4.72943 4.80115 4.83742 4.90322 5.06044 5.13880 5.20612 5.23484 5.30865 5.41730 5.50727 5.53735 5.56426 5.56655 5.57028 5.58010 5.76216 5.78646 5.83540 5.93815 5.97180 5.98696 6.09782 6.10226 6.27269 6.28172 6.38067 6.39517 6.40093 6.47867 6.56457 6.63937 6.73395 6.81030 6.83998 6.88477 6.98982 7.28608 7.57965 7.75121 7.81440 8.39765 8.47154 9.16752 9.80119 10.37423 11.24822 Molecular weight = 342.20amu Principal moments of inertia in cm(-1) A = 0.010425 B = 0.002913 C = 0.002452 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 2685.220974 B = 9608.144367 C =11417.261217 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.121 4.121 2 C -0.073 4.073 3 C -0.120 4.120 4 C -0.121 4.121 5 C -0.124 4.124 6 C -0.115 4.115 7 C -0.053 4.053 8 C -0.084 4.084 9 H 0.128 0.872 10 C -0.146 4.146 11 C -0.175 4.175 12 H 0.127 0.873 13 C 0.542 3.458 14 O -0.552 6.552 15 N -0.713 5.713 16 C 0.131 3.869 17 C -0.127 4.127 18 H 0.069 0.931 19 C -0.100 4.100 20 C -0.133 4.133 21 C 0.143 3.857 22 N -0.593 5.593 23 C -0.252 4.252 24 H 0.066 0.934 25 C 0.003 3.997 26 N -0.901 5.901 27 Si 0.900 3.100 28 H -0.287 1.287 29 H -0.279 1.279 30 H -0.291 1.291 31 C 0.179 3.821 32 H 0.070 0.930 33 H 0.065 0.935 34 H 0.076 0.924 35 H 0.121 0.879 36 H 0.120 0.880 37 H 0.121 0.879 38 H 0.124 0.876 39 H 0.104 0.896 40 H 0.107 0.893 41 H 0.407 0.593 42 H 0.064 0.936 43 H 0.058 0.942 44 H 0.056 0.944 45 H 0.047 0.953 46 H 0.051 0.949 47 H 0.057 0.943 48 H 0.017 0.983 49 H 0.052 0.948 50 H 0.254 0.746 51 H 0.087 0.913 52 H 0.018 0.982 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges 0.794 4.964 15.697 16.482 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 -0.073 4.073 3 C -0.138 4.138 4 C -0.139 4.139 5 C -0.142 4.142 6 C -0.133 4.133 7 C -0.053 4.053 8 C -0.103 4.103 9 H 0.146 0.854 10 C -0.183 4.183 11 C -0.196 4.196 12 H 0.145 0.855 13 C 0.328 3.672 14 O -0.431 6.431 15 N -0.363 5.363 16 C 0.007 3.993 17 C -0.148 4.148 18 H 0.087 0.913 19 C -0.139 4.139 20 C -0.172 4.172 21 C 0.017 3.983 22 N -0.315 5.315 23 C -0.382 4.382 24 H 0.083 0.917 25 C -0.196 4.196 26 N -0.546 5.546 27 Si 0.730 3.270 28 H -0.214 1.214 29 H -0.204 1.204 30 H -0.218 1.218 31 C 0.053 3.947 32 H 0.088 0.912 33 H 0.084 0.916 34 H 0.095 0.905 35 H 0.139 0.861 36 H 0.138 0.862 37 H 0.139 0.861 38 H 0.142 0.858 39 H 0.122 0.878 40 H 0.125 0.875 41 H 0.242 0.758 42 H 0.083 0.917 43 H 0.076 0.924 44 H 0.075 0.925 45 H 0.066 0.934 46 H 0.069 0.931 47 H 0.076 0.924 48 H 0.035 0.965 49 H 0.071 0.929 50 H 0.064 0.936 51 H 0.106 0.894 52 H 0.036 0.964 Dipole moment (debyes) X Y Z Total from point charges 0.078 5.192 16.015 16.836 hybrid contribution 1.456 0.122 -0.652 1.600 sum 1.534 5.314 15.363 16.328 Atomic orbital electron populations 1.20877 0.91025 1.03481 1.02368 1.19758 0.96263 0.92326 0.98966 1.21020 0.94271 0.97376 1.01163 1.21125 0.94319 0.98033 1.00461 1.21090 0.99801 0.92448 1.00896 1.21063 0.93559 0.98380 1.00318 1.19005 0.93012 0.92775 1.00473 1.21060 1.00726 0.87792 1.00713 0.85424 1.23115 1.00230 0.98786 0.96193 1.22382 1.00450 1.03092 0.93662 0.85541 1.19509 0.88481 0.79401 0.79769 1.90653 1.27768 1.67256 1.57404 1.45967 1.14841 1.41781 1.33721 1.21392 0.88313 0.93503 0.96057 1.22062 0.98431 0.97805 0.96507 0.91260 1.21335 0.97473 0.97420 0.97621 1.21993 0.99854 0.97914 0.97463 1.20932 0.92199 0.91358 0.93828 1.44033 1.15847 1.40930 1.30689 1.19211 0.96343 0.94245 1.28382 0.91665 1.25022 0.98830 0.95043 1.00679 1.70042 1.34625 0.97229 1.52666 0.86331 0.85483 0.77007 0.78227 1.21445 1.20435 1.21764 1.20709 1.00145 0.90361 0.83489 0.91158 0.91573 0.90525 0.86085 0.86219 0.86129 0.85819 0.87807 0.87520 0.75805 0.91734 0.92388 0.92474 0.93418 0.93060 0.92437 0.96483 0.92911 0.93629 0.89442 0.96419 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 -0.12 -1.26 9.33 36.01 0.34 -0.92 16 2 C -0.07 -0.84 5.88 -104.62 -0.62 -1.46 16 3 C -0.12 -1.24 9.70 -39.58 -0.38 -1.63 16 4 C -0.12 -1.19 10.05 -39.58 -0.40 -1.59 16 5 C -0.12 -1.24 10.05 -39.58 -0.40 -1.64 16 6 C -0.12 -1.24 9.30 -39.59 -0.37 -1.61 16 7 C -0.05 -0.62 5.61 -104.62 -0.59 -1.21 16 8 C -0.08 -1.01 4.65 -91.77 -0.43 -1.44 16 9 H 0.13 1.65 6.44 -51.93 -0.33 1.31 16 10 C -0.15 -1.54 9.56 -26.73 -0.26 -1.79 16 11 C -0.17 -2.27 5.82 -91.77 -0.53 -2.80 16 12 H 0.13 1.61 8.14 -51.93 -0.42 1.19 16 13 C 0.54 8.67 7.61 -10.98 -0.08 8.58 16 14 O -0.55 -10.30 16.26 5.56 0.09 -10.21 16 15 N -0.71 -11.38 5.33 -60.29 -0.32 -11.70 16 16 C 0.13 2.17 5.07 -4.04 -0.02 2.15 16 17 C -0.13 -2.27 2.36 -90.73 -0.21 -2.48 16 18 H 0.07 1.26 8.14 -51.93 -0.42 0.84 16 19 C -0.10 -1.63 5.17 -26.69 -0.14 -1.77 16 20 C -0.13 -2.24 6.08 -26.61 -0.16 -2.41 16 21 C 0.14 2.95 6.52 -3.71 -0.02 2.92 16 22 N -0.59 -14.39 3.00 -172.58 -0.52 -14.91 16 23 C -0.25 -6.72 9.58 -15.06 -0.14 -6.86 16 24 H 0.07 1.72 7.88 -52.49 -0.41 1.31 16 25 C 0.00 0.08 4.91 -17.43 -0.09 -0.01 16 26 N -0.90 -25.25 11.19 55.49 0.62 -24.63 16 27 Si 0.90 21.03 29.59 -169.99 -5.03 16.00 16 28 H -0.29 -6.63 7.11 56.52 0.40 -6.22 16 29 H -0.28 -6.44 7.11 56.52 0.40 -6.04 16 30 H -0.29 -6.94 7.11 56.52 0.40 -6.54 16 31 C 0.18 4.02 4.37 -3.93 -0.02 4.01 16 32 H 0.07 0.64 8.14 -51.93 -0.42 0.22 16 33 H 0.07 0.61 8.09 -51.93 -0.42 0.19 16 34 H 0.08 0.91 6.65 -51.94 -0.35 0.57 16 35 H 0.12 1.01 8.06 -52.49 -0.42 0.59 16 36 H 0.12 0.90 8.06 -52.49 -0.42 0.48 16 37 H 0.12 0.96 8.06 -52.48 -0.42 0.53 16 38 H 0.12 1.13 6.02 -52.49 -0.32 0.81 16 39 H 0.10 1.08 8.14 -51.93 -0.42 0.65 16 40 H 0.11 0.92 6.18 -51.93 -0.32 0.60 16 41 H 0.41 6.34 7.69 -40.82 -0.31 6.03 16 42 H 0.06 1.14 8.14 -51.93 -0.42 0.72 16 43 H 0.06 0.91 8.14 -51.93 -0.42 0.49 16 44 H 0.06 0.94 8.14 -51.93 -0.42 0.52 16 45 H 0.05 0.68 8.14 -51.93 -0.42 0.26 16 46 H 0.05 0.74 8.14 -51.93 -0.42 0.32 16 47 H 0.06 0.99 8.14 -51.93 -0.42 0.57 16 48 H 0.02 0.36 8.14 -51.93 -0.42 -0.06 16 49 H 0.05 1.07 7.93 -51.93 -0.41 0.65 16 50 H 0.25 6.92 8.31 -40.82 -0.34 6.58 16 51 H 0.09 2.14 5.24 -51.93 -0.27 1.87 16 52 H 0.02 0.44 8.14 -51.93 -0.42 0.02 16 LS Contribution 410.64 15.07 6.19 6.19 Total: -1.00 -30.66 410.64 -12.11 -42.78 By element: Atomic # 1 Polarization: 17.06 SS G_CDS: -8.63 Total: 8.43 kcal Atomic # 6 Polarization: -7.43 SS G_CDS: -4.52 Total: -11.95 kcal Atomic # 7 Polarization: -51.02 SS G_CDS: -0.22 Total: -51.24 kcal Atomic # 8 Polarization: -10.30 SS G_CDS: 0.09 Total: -10.21 kcal Atomic # 14 Polarization: 21.03 SS G_CDS: -5.03 Total: 16.00 kcal Total LS contribution 6.19 Total: 6.19 kcal Total: -30.66 -12.11 -42.78 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. ZINC000267151753.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 58.228 kcal (2) G-P(sol) polarization free energy of solvation -30.662 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system 27.567 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -12.115 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -42.777 kcal (6) G-S(sol) free energy of system = (1) + (5) 15.452 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 1.51 seconds