Wall clock time and date at job start Sat Apr 11 2020 06:14:12 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 1.42908 * 1 3 3 C 1.42891 * 113.99826 * 2 1 4 4 C 1.53007 * 109.47020 * 180.02562 * 3 2 1 5 5 C 1.52997 * 109.47132 * 185.02797 * 4 3 2 6 6 C 1.50702 * 110.43634 * 64.54030 * 5 4 3 7 7 O 1.21287 * 119.99699 * 234.76863 * 6 5 4 8 8 N 1.34770 * 120.00264 * 54.76738 * 6 5 4 9 9 C 1.46502 * 120.00383 * 184.92198 * 8 6 5 10 10 C 1.52992 * 109.47280 * 179.97438 * 9 8 6 11 11 H 1.09001 * 109.51860 * 60.10048 * 10 9 8 12 12 C 1.53295 * 109.51289 * 180.25315 * 10 9 8 13 13 N 1.47151 * 108.38684 * 172.22669 * 12 10 9 14 14 C 1.36937 * 120.98386 * 129.44038 * 13 12 10 15 15 H 1.07999 * 120.00034 * 210.39031 * 14 13 12 16 16 C 1.38816 * 120.00012 * 30.39827 * 14 13 12 17 17 N 1.31616 * 119.99970 * 9.94413 * 16 14 13 18 18 Si 1.86799 * 119.99952 * 189.95095 * 16 14 13 19 19 H 1.48497 * 109.47400 * 89.99325 * 18 16 14 20 20 H 1.48495 * 109.47171 * 209.99684 * 18 16 14 21 21 H 1.48505 * 109.46996 * 329.99222 * 18 16 14 22 22 C 1.47157 * 118.03367 * 309.45911 * 13 12 10 23 23 C 1.53290 * 108.38259 * 50.53947 * 22 13 12 24 24 O 1.42962 * 109.22131 * 307.69485 * 23 22 13 25 25 C 1.54895 * 110.48535 * 187.07913 * 5 4 3 26 26 C 1.55235 * 102.58709 * 156.67632 * 25 5 4 27 27 C 1.54277 * 104.23390 * 322.08480 * 26 25 5 28 28 C 1.53877 * 106.59577 * 23.61044 * 27 26 25 29 29 H 1.08998 * 109.46730 * 179.97438 * 1 2 3 30 30 H 1.08994 * 109.46543 * 299.99672 * 1 2 3 31 31 H 1.08994 * 109.47168 * 59.99669 * 1 2 3 32 32 H 1.09007 * 109.47273 * 60.00413 * 3 2 1 33 33 H 1.08997 * 109.47435 * 300.00005 * 3 2 1 34 34 H 1.08997 * 109.47281 * 65.02333 * 4 3 2 35 35 H 1.09004 * 109.46929 * 305.02356 * 4 3 2 36 36 H 0.97006 * 120.00116 * 4.91396 * 8 6 5 37 37 H 1.08995 * 109.47327 * 59.99026 * 9 8 6 38 38 H 1.09001 * 109.46727 * 299.99825 * 9 8 6 39 39 H 1.09007 * 109.67918 * 291.94844 * 12 10 9 40 40 H 1.08994 * 109.68403 * 52.49858 * 12 10 9 41 41 H 0.97005 * 119.99799 * 180.02562 * 17 16 14 42 42 H 1.08992 * 109.67961 * 290.81437 * 22 13 12 43 43 H 1.09001 * 109.67475 * 170.25920 * 22 13 12 44 44 H 1.08998 * 109.51387 * 187.77550 * 23 22 13 45 45 H 1.09006 * 109.51554 * 67.62029 * 23 22 13 46 46 H 1.08995 * 110.75724 * 275.06818 * 25 5 4 47 47 H 1.08997 * 110.75147 * 38.43820 * 25 5 4 48 48 H 1.09004 * 110.46892 * 203.39731 * 26 25 5 49 49 H 1.08999 * 110.58332 * 80.82766 * 26 25 5 50 50 H 1.09000 * 110.02976 * 264.32688 * 27 26 25 51 51 H 1.08992 * 110.07462 * 142.91769 * 27 26 25 52 52 H 1.09003 * 110.03436 * 240.71746 * 28 27 26 53 53 H 1.08997 * 110.07404 * 119.30951 * 28 27 26 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 1.4291 0.0000 0.0000 3 6 2.0102 1.3054 0.0000 4 6 3.5355 1.1846 -0.0006 5 6 4.1574 2.5767 0.1258 6 6 3.8084 3.1900 1.4574 7 8 3.2777 4.2797 1.5027 8 7 4.0858 2.5277 2.5978 9 6 3.6505 3.0729 3.8861 10 6 4.0888 2.1339 5.0116 11 1 5.1749 2.0416 5.0067 12 6 3.6282 2.7003 6.3595 13 7 3.8940 1.6949 7.4006 14 6 4.5641 2.0279 8.5475 15 1 5.1720 1.2909 9.0510 16 6 4.4620 3.3128 9.0629 17 7 3.5757 4.1513 8.5692 18 14 5.5824 3.8517 10.4569 19 1 6.8230 4.4432 9.8946 20 1 4.8847 4.8641 11.2896 21 1 5.9303 2.6762 11.2950 22 6 3.4187 0.3210 7.1728 23 6 3.8895 -0.1295 5.7853 24 8 3.4992 0.8462 4.8160 25 6 5.6945 2.5018 -0.0503 26 6 6.0544 3.9441 -0.4977 27 6 4.8914 4.3552 -1.4242 28 6 3.6853 3.4858 -1.0277 29 1 -0.3633 -1.0277 -0.0005 30 1 -0.3632 0.5138 0.8900 31 1 -0.3633 0.5139 -0.8899 32 1 1.6886 1.8463 0.8901 33 1 1.6886 1.8463 -0.8899 34 1 3.8631 0.7235 -0.9324 35 1 3.8515 0.5678 0.8407 36 1 4.5738 1.6899 2.5658 37 1 2.5645 3.1658 3.8930 38 1 4.0999 4.0546 4.0357 39 1 4.1801 3.6137 6.5818 40 1 2.5605 2.9160 6.3215 41 1 3.5046 5.0493 8.9291 42 1 2.3299 0.2972 7.2167 43 1 3.8319 -0.3412 7.9336 44 1 3.4339 -1.0888 5.5399 45 1 4.9749 -0.2302 5.7840 46 1 6.1799 2.2551 0.8939 47 1 5.9600 1.7800 -0.8226 48 1 6.9976 3.9494 -1.0442 49 1 6.1097 4.6099 0.3635 50 1 5.1593 4.1700 -2.4644 51 1 4.6545 5.4095 -1.2819 52 1 3.3678 2.8787 -1.8756 53 1 2.8627 4.1176 -0.6925 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 ZINC001568227657.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 06:14:12 Heat of formation + Delta-G solvation = -122.151986 kcal Electronic energy + Delta-G solvation = -31704.257980 eV Core-core repulsion = 27575.998814 eV Total energy + Delta-G solvation = -4128.259166 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.220 amu Computer time = 1.11 seconds Orbital eigenvalues (eV) -40.67105 -38.62305 -37.92670 -37.11666 -34.81438 -34.30796 -32.80398 -31.34331 -30.85579 -28.99161 -28.07459 -27.31048 -26.00286 -25.45449 -23.31437 -22.88816 -22.51340 -21.48539 -20.48254 -19.85429 -18.90915 -17.16353 -16.88405 -16.65229 -16.09957 -16.00565 -15.72785 -15.39492 -15.17330 -15.03376 -14.76745 -14.35239 -14.25553 -13.98739 -13.77078 -13.47420 -13.21709 -13.19931 -12.90174 -12.77581 -12.49595 -12.13380 -11.78018 -11.61835 -11.52375 -11.43157 -11.39596 -11.22268 -11.06930 -10.98034 -10.89520 -10.76047 -10.73382 -10.55190 -10.41353 -10.26164 -10.09961 -9.79394 -9.68321 -9.55162 -9.04494 -8.81541 -8.58887 -6.71991 -5.86163 -3.36124 2.75357 3.29318 3.33316 3.39212 3.40644 3.54382 4.25579 4.27386 4.38433 4.41221 4.61117 4.85848 4.92576 4.99840 5.10537 5.18186 5.20357 5.22769 5.26570 5.31767 5.33244 5.34134 5.47168 5.51967 5.55457 5.55640 5.61449 5.64611 5.76857 5.78273 5.85205 5.87089 5.90592 5.93949 6.02873 6.05124 6.06393 6.12333 6.24925 6.26702 6.37069 6.50901 6.69287 6.78109 7.00119 7.06906 7.48831 7.68534 7.69979 7.84411 8.34014 8.38369 9.09846 9.70653 10.29694 11.21403 Molecular weight = 340.22amu Principal moments of inertia in cm(-1) A = 0.012894 B = 0.002992 C = 0.002629 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 2170.995354 B = 9356.588519 C =10649.200728 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 0.060 3.940 4 C -0.102 4.102 5 C -0.081 4.081 6 C 0.524 3.476 7 O -0.541 6.541 8 N -0.717 5.717 9 C 0.133 3.867 10 C 0.054 3.946 11 H 0.055 0.945 12 C 0.154 3.846 13 N -0.594 5.594 14 C -0.258 4.258 15 H 0.067 0.933 16 C 0.006 3.994 17 N -0.903 5.903 18 Si 0.908 3.092 19 H -0.286 1.286 20 H -0.289 1.289 21 H -0.278 1.278 22 C 0.109 3.891 23 C 0.050 3.950 24 O -0.389 6.389 25 C -0.109 4.109 26 C -0.126 4.126 27 C -0.120 4.120 28 C -0.109 4.109 29 H 0.085 0.915 30 H 0.043 0.957 31 H 0.039 0.961 32 H 0.051 0.949 33 H 0.051 0.949 34 H 0.081 0.919 35 H 0.079 0.921 36 H 0.401 0.599 37 H 0.072 0.928 38 H 0.081 0.919 39 H 0.096 0.904 40 H 0.031 0.969 41 H 0.256 0.744 42 H 0.026 0.974 43 H 0.061 0.939 44 H 0.082 0.918 45 H 0.042 0.958 46 H 0.072 0.928 47 H 0.080 0.920 48 H 0.067 0.933 49 H 0.067 0.933 50 H 0.062 0.938 51 H 0.065 0.935 52 H 0.069 0.931 53 H 0.082 0.918 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges 1.044 -5.901 -20.817 21.662 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 -0.064 4.064 2 O -0.310 6.310 3 C -0.016 4.016 4 C -0.140 4.140 5 C -0.084 4.084 6 C 0.309 3.691 7 O -0.418 6.418 8 N -0.368 5.368 9 C 0.009 3.991 10 C -0.005 4.005 11 H 0.073 0.927 12 C 0.028 3.972 13 N -0.318 5.318 14 C -0.387 4.387 15 H 0.085 0.915 16 C -0.193 4.193 17 N -0.547 5.547 18 Si 0.737 3.263 19 H -0.213 1.213 20 H -0.215 1.215 21 H -0.204 1.204 22 C -0.017 4.017 23 C -0.028 4.028 24 O -0.308 6.308 25 C -0.147 4.147 26 C -0.163 4.163 27 C -0.157 4.157 28 C -0.147 4.147 29 H 0.104 0.896 30 H 0.062 0.938 31 H 0.057 0.943 32 H 0.069 0.931 33 H 0.069 0.931 34 H 0.099 0.901 35 H 0.098 0.902 36 H 0.236 0.764 37 H 0.090 0.910 38 H 0.100 0.900 39 H 0.114 0.886 40 H 0.049 0.951 41 H 0.066 0.934 42 H 0.044 0.956 43 H 0.080 0.920 44 H 0.100 0.900 45 H 0.061 0.939 46 H 0.091 0.909 47 H 0.099 0.901 48 H 0.086 0.914 49 H 0.086 0.914 50 H 0.080 0.920 51 H 0.084 0.916 52 H 0.087 0.913 53 H 0.101 0.899 Dipole moment (debyes) X Y Z Total from point charges 0.582 -5.144 -20.814 21.448 hybrid contribution 0.625 0.195 1.112 1.291 sum 1.207 -4.949 -19.702 20.350 Atomic orbital electron populations 1.22728 0.80969 1.02661 1.00065 1.87837 1.19777 1.27919 1.95458 1.22573 0.93760 0.84708 1.00605 1.21522 0.93528 0.94886 1.04057 1.21632 0.97473 0.95589 0.93749 1.20239 0.78305 0.85168 0.85387 1.90679 1.43359 1.20363 1.87413 1.45962 1.58260 1.26368 1.06195 1.21409 1.00693 0.96520 0.80442 1.23163 0.96575 0.83878 0.96889 0.92745 1.21302 0.99066 0.93631 0.83210 1.43997 1.65684 1.04213 1.17936 1.19180 1.21384 0.96906 1.01236 0.91520 1.25198 0.97672 0.98207 0.98254 1.69957 1.34333 1.06697 1.43736 0.86216 0.79998 0.78292 0.81784 1.21308 1.21545 1.20367 1.21611 0.97037 0.88633 0.94437 1.23001 0.98502 0.90763 0.90505 1.87785 1.71197 1.20277 1.51577 1.22632 0.91990 0.97971 1.02096 1.22425 0.98221 0.95987 0.99689 1.22069 0.94671 1.00103 0.98899 1.22173 0.99260 0.97389 0.95833 0.89647 0.93839 0.94277 0.93086 0.93097 0.90051 0.90213 0.76415 0.90984 0.90048 0.88624 0.95136 0.93361 0.95582 0.92016 0.90036 0.93937 0.90941 0.90101 0.91402 0.91409 0.91957 0.91588 0.91252 0.89928 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 15. 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 0.31 11.01 101.05 1.11 1.42 16 2 O -0.39 -4.79 10.70 -35.23 -0.38 -5.17 16 3 C 0.06 0.69 5.47 37.16 0.20 0.89 16 4 C -0.10 -1.02 4.46 -26.73 -0.12 -1.14 16 5 C -0.08 -0.86 0.48 -154.00 -0.07 -0.93 16 6 C 0.52 7.46 5.24 -10.99 -0.06 7.41 16 7 O -0.54 -9.62 15.47 5.55 0.09 -9.53 16 8 N -0.72 -10.25 5.19 -60.30 -0.31 -10.56 16 9 C 0.13 2.27 5.38 -4.04 -0.02 2.25 16 10 C 0.05 1.03 2.87 -26.58 -0.08 0.95 16 11 H 0.05 1.02 8.14 -51.93 -0.42 0.60 16 12 C 0.15 3.64 4.67 -3.53 -0.02 3.62 16 13 N -0.59 -14.79 3.04 -171.83 -0.52 -15.31 16 14 C -0.26 -6.95 9.64 -15.06 -0.15 -7.10 16 15 H 0.07 1.76 7.85 -52.49 -0.41 1.34 16 16 C 0.01 0.16 5.08 -17.43 -0.09 0.07 16 17 N -0.90 -25.81 11.03 55.49 0.61 -25.20 16 18 Si 0.91 21.34 29.57 -169.99 -5.03 16.32 16 19 H -0.29 -6.69 7.11 56.52 0.40 -6.29 16 20 H -0.29 -6.89 7.11 56.52 0.40 -6.49 16 21 H -0.28 -6.40 7.11 56.52 0.40 -6.00 16 22 C 0.11 2.27 6.73 -3.53 -0.02 2.25 16 23 C 0.05 0.88 6.98 37.31 0.26 1.14 16 24 O -0.39 -7.21 10.13 -35.23 -0.36 -7.56 16 25 C -0.11 -0.97 5.83 -24.55 -0.14 -1.11 16 26 C -0.13 -1.17 6.62 -24.88 -0.16 -1.34 16 27 C -0.12 -1.11 6.80 -25.61 -0.17 -1.29 16 28 C -0.11 -1.10 4.71 -25.61 -0.12 -1.22 16 29 H 0.09 0.68 8.14 -51.93 -0.42 0.26 16 30 H 0.04 0.43 8.14 -51.93 -0.42 0.00 16 31 H 0.04 0.32 8.14 -51.93 -0.42 -0.11 16 32 H 0.05 0.68 7.26 -51.92 -0.38 0.31 16 33 H 0.05 0.52 7.14 -51.93 -0.37 0.15 16 34 H 0.08 0.69 8.08 -51.93 -0.42 0.27 16 35 H 0.08 0.83 7.34 -51.93 -0.38 0.45 16 36 H 0.40 5.11 7.56 -40.82 -0.31 4.80 16 37 H 0.07 1.32 8.14 -51.93 -0.42 0.90 16 38 H 0.08 1.43 8.14 -51.93 -0.42 1.01 16 39 H 0.10 2.48 6.24 -51.92 -0.32 2.16 16 40 H 0.03 0.78 8.14 -51.93 -0.42 0.36 16 41 H 0.26 7.10 8.31 -40.82 -0.34 6.76 16 42 H 0.03 0.56 8.14 -51.93 -0.42 0.14 16 43 H 0.06 1.22 7.96 -51.93 -0.41 0.80 16 44 H 0.08 1.19 8.14 -51.93 -0.42 0.77 16 45 H 0.04 0.72 8.14 -51.93 -0.42 0.30 16 46 H 0.07 0.65 7.92 -51.93 -0.41 0.24 16 47 H 0.08 0.58 8.02 -51.93 -0.42 0.16 16 48 H 0.07 0.53 8.14 -51.93 -0.42 0.10 16 49 H 0.07 0.75 8.14 -51.93 -0.42 0.33 16 50 H 0.06 0.47 8.14 -51.93 -0.42 0.05 16 51 H 0.07 0.66 8.14 -51.93 -0.42 0.24 16 52 H 0.07 0.58 7.44 -51.93 -0.39 0.20 16 53 H 0.08 1.01 6.93 -51.93 -0.36 0.65 16 LS Contribution 410.46 15.07 6.19 6.19 Total: -1.00 -31.53 410.46 -8.99 -40.52 By element: Atomic # 1 Polarization: 14.09 SS G_CDS: -9.63 Total: 4.45 kcal Atomic # 6 Polarization: 5.51 SS G_CDS: 0.35 Total: 5.86 kcal Atomic # 7 Polarization: -50.85 SS G_CDS: -0.22 Total: -51.08 kcal Atomic # 8 Polarization: -21.62 SS G_CDS: -0.65 Total: -22.27 kcal Atomic # 14 Polarization: 21.34 SS G_CDS: -5.03 Total: 16.32 kcal Total LS contribution 6.19 Total: 6.19 kcal Total: -31.53 -8.99 -40.52 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. ZINC001568227657.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 -81.629 kcal (2) G-P(sol) polarization free energy of solvation -31.529 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -113.158 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -8.994 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -40.523 kcal (6) G-S(sol) free energy of system = (1) + (5) -122.152 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 1.11 seconds