Wall clock time and date at job start Tue Mar 31 2020 20:43:16 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 1.42905 * 1 3 3 C 1.42895 * 114.00128 * 2 1 4 4 C 1.52997 * 109.47503 * 210.00358 * 3 2 1 5 5 C 1.53000 * 109.47060 * 180.02562 * 4 3 2 6 6 C 1.52996 * 109.47328 * 60.00126 * 5 4 3 7 7 C 1.52997 * 109.46975 * 180.02562 * 6 5 4 8 8 C 1.50707 * 109.47376 * 184.99777 * 7 6 5 9 9 O 1.21282 * 119.99303 * 359.97438 * 8 7 6 10 10 N 1.34776 * 120.00263 * 180.02562 * 8 7 6 11 11 C 1.46497 * 119.99669 * 180.02562 * 10 8 7 12 12 H 1.09003 * 110.56225 * 34.29774 * 11 10 8 13 13 C 1.54845 * 110.62654 * 271.39645 * 11 10 8 14 14 C 1.55850 * 103.44791 * 241.51279 * 13 11 10 15 15 H 1.08993 * 115.56224 * 158.81494 * 14 13 11 16 16 C 1.55848 * 105.06143 * 288.17568 * 14 13 11 17 17 C 1.55163 * 103.50042 * 71.74130 * 16 14 13 18 18 C 1.55839 * 103.41694 * 0.05994 * 17 16 14 19 19 H 1.09003 * 116.12964 * 159.23127 * 18 17 16 20 20 N 1.50237 * 101.04767 * 32.93848 * 14 13 11 21 21 C 1.36936 * 130.84000 * 126.05488 * 20 14 13 22 22 H 1.08003 * 120.00372 * 179.97438 * 21 20 14 23 23 C 1.38810 * 119.99653 * 359.96567 * 21 20 14 24 24 N 1.31619 * 120.00421 * 0.02562 * 23 21 20 25 25 Si 1.86803 * 119.99845 * 180.02562 * 23 21 20 26 26 H 1.48491 * 109.47492 * 60.00034 * 25 23 21 27 27 H 1.48505 * 109.47184 * 180.02562 * 25 23 21 28 28 H 1.48503 * 109.46908 * 299.99955 * 25 23 21 29 29 C 1.53002 * 109.46891 * 299.99597 * 6 5 4 30 30 C 1.52997 * 109.46978 * 60.00410 * 29 6 5 31 31 H 1.09005 * 109.46999 * 179.97438 * 1 2 3 32 32 H 1.09001 * 109.46516 * 299.99257 * 1 2 3 33 33 H 1.08996 * 109.47248 * 59.99618 * 1 2 3 34 34 H 1.08998 * 109.47064 * 330.01060 * 3 2 1 35 35 H 1.09002 * 109.47153 * 60.00043 * 4 3 2 36 36 H 1.09001 * 109.46832 * 300.00234 * 4 3 2 37 37 H 1.09004 * 109.46724 * 180.02562 * 5 4 3 38 38 H 1.09001 * 109.47194 * 299.99650 * 5 4 3 39 39 H 1.08992 * 109.47554 * 59.99639 * 6 5 4 40 40 H 1.08994 * 109.47445 * 304.99750 * 7 6 5 41 41 H 1.09000 * 109.47459 * 65.00057 * 7 6 5 42 42 H 0.96996 * 119.99578 * 359.97438 * 10 8 7 43 43 H 1.09003 * 110.63088 * 0.02562 * 13 11 10 44 44 H 1.09004 * 110.63153 * 122.86655 * 13 11 10 45 45 H 1.09003 * 110.62290 * 190.31275 * 16 14 13 46 46 H 1.09000 * 110.62657 * 313.33297 * 16 14 13 47 47 H 1.09002 * 110.56870 * 241.61107 * 17 16 14 48 48 H 1.09001 * 110.84756 * 118.63746 * 17 16 14 49 49 H 0.96998 * 120.00219 * 180.02562 * 24 23 21 50 50 H 1.09002 * 109.47097 * 180.02562 * 29 6 5 51 51 H 1.09001 * 109.47142 * 300.00176 * 29 6 5 52 52 H 1.09001 * 109.47375 * 59.99908 * 30 29 6 53 53 H 1.09000 * 109.47140 * 179.97438 * 30 29 6 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 2.0103 1.3054 0.0000 4 6 3.3589 1.2633 -0.7213 5 6 3.9814 2.6609 -0.7207 6 6 4.1890 3.1261 0.7220 7 6 4.8110 4.5240 0.7225 8 6 5.1286 4.9321 2.1381 9 8 4.8813 4.1790 3.0561 10 7 5.6864 6.1341 2.3839 11 6 5.9956 6.5304 3.7599 12 1 6.2998 5.6648 4.3485 13 6 4.7794 7.2330 4.4116 14 6 5.3161 8.6596 4.7364 15 1 4.5560 9.4300 4.8657 16 6 6.3008 8.4603 5.9279 17 6 7.5193 7.7543 5.2766 18 6 7.1049 7.6250 3.7799 19 1 7.9175 7.4841 3.0672 20 7 6.2770 8.8711 3.6010 21 6 6.3722 9.8850 2.6855 22 1 7.1445 9.8605 1.9309 23 6 5.4759 10.9441 2.7272 24 7 4.5349 10.9742 3.6470 25 14 5.6052 12.3268 1.4778 26 1 5.4438 11.7740 0.1091 27 1 4.5400 13.3288 1.7363 28 1 6.9350 12.9773 1.5953 29 6 2.8404 3.1683 1.4433 30 6 2.2178 1.7707 1.4427 31 1 -0.3633 -1.0277 -0.0005 32 1 -0.3632 0.5137 0.8901 33 1 -0.3633 0.5139 -0.8899 34 1 1.3450 1.9993 -0.5137 35 1 3.2111 0.9314 -1.7490 36 1 4.0242 0.5693 -0.2075 37 1 4.9421 2.6309 -1.2350 38 1 3.3163 3.3552 -1.2342 39 1 4.8541 2.4320 1.2355 40 1 5.7277 4.5141 0.1329 41 1 4.1077 5.2348 0.2887 42 1 5.8838 6.7364 1.6497 43 1 3.9459 7.2863 3.7112 44 1 4.4802 6.7160 5.3234 45 1 6.5933 9.4221 6.3493 46 1 5.8545 7.8247 6.6927 47 1 7.6731 6.7700 5.7189 48 1 8.4183 8.3628 5.3748 49 1 3.9084 11.7141 3.6758 50 1 2.9882 3.5002 2.4709 51 1 2.1752 3.8626 0.9297 52 1 2.8830 1.0765 1.9563 53 1 1.2572 1.8007 1.9570 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 ZINC001098511549.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 20:43:16 Heat of formation + Delta-G solvation = -64.247030 kcal Electronic energy + Delta-G solvation = -30349.814040 eV Core-core repulsion = 26414.521873 eV Total energy + Delta-G solvation = -3935.292167 eV No. of doubly occupied orbitals = 65 Molecular weight (most abundant/longest-lived isotopes) = 336.220 amu Computer time = 0.89 seconds Orbital eigenvalues (eV) -40.08345 -39.31344 -38.33537 -36.60155 -33.71295 -32.55574 -31.96728 -30.87990 -29.11240 -28.94269 -28.15375 -27.11956 -25.74429 -24.18880 -22.83530 -22.06610 -21.02251 -19.95556 -19.84119 -19.56880 -18.61767 -17.01219 -16.80070 -16.64271 -15.89949 -15.81748 -15.33069 -14.93729 -14.78836 -14.32921 -14.19902 -14.03078 -13.80565 -13.62858 -13.24067 -13.01613 -12.78524 -12.42285 -12.19391 -12.05877 -11.94354 -11.84732 -11.68184 -11.24666 -11.16886 -11.11661 -10.95906 -10.92693 -10.90034 -10.71567 -10.62459 -10.50427 -10.36680 -10.34898 -10.14045 -9.91894 -9.68796 -9.48888 -9.21644 -9.06983 -8.97084 -8.39713 -6.96759 -5.76502 -3.15586 3.04413 3.34070 3.38879 3.40418 3.51841 3.68328 4.38222 4.55440 4.61886 4.73814 4.92724 4.95766 5.09880 5.11305 5.11958 5.17084 5.28372 5.32152 5.34880 5.39518 5.41610 5.47879 5.55432 5.63981 5.65914 5.71182 5.74036 5.86320 5.89726 5.91343 5.99479 6.05318 6.08988 6.12363 6.14106 6.16024 6.30769 6.40811 6.43849 6.47289 6.50886 6.60911 6.75640 6.82384 6.95124 7.02137 7.15827 7.32868 7.44257 7.77574 8.06103 8.15429 8.69986 9.04962 9.68107 10.49678 11.32365 Molecular weight = 336.22amu Principal moments of inertia in cm(-1) A = 0.015308 B = 0.002564 C = 0.002397 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1828.673251 B =10915.902486 C =11677.606216 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C 0.031 3.969 2 O -0.389 6.389 3 C 0.088 3.912 4 C -0.113 4.113 5 C -0.113 4.113 6 C -0.070 4.070 7 C -0.139 4.139 8 C 0.508 3.492 9 O -0.551 6.551 10 N -0.708 5.708 11 C 0.130 3.870 12 H 0.077 0.923 13 C -0.142 4.142 14 C 0.154 3.846 15 H 0.152 0.848 16 C -0.138 4.138 17 C -0.127 4.127 18 C 0.124 3.876 19 H 0.087 0.913 20 N -0.591 5.591 21 C -0.214 4.214 22 H 0.077 0.923 23 C -0.010 4.010 24 N -0.920 5.920 25 Si 0.915 3.085 26 H -0.286 1.286 27 H -0.291 1.291 28 H -0.286 1.286 29 C -0.118 4.118 30 C -0.136 4.136 31 H 0.083 0.917 32 H 0.041 0.959 33 H 0.039 0.961 34 H 0.058 0.942 35 H 0.066 0.934 36 H 0.071 0.929 37 H 0.069 0.931 38 H 0.064 0.936 39 H 0.079 0.921 40 H 0.090 0.910 41 H 0.091 0.909 42 H 0.402 0.598 43 H 0.058 0.942 44 H 0.051 0.949 45 H 0.055 0.945 46 H 0.048 0.952 47 H 0.051 0.949 48 H 0.056 0.944 49 H 0.254 0.746 50 H 0.090 0.910 51 H 0.054 0.946 52 H 0.070 0.930 53 H 0.059 0.941 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -3.032 -16.440 -6.710 18.013 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 -0.308 6.308 3 C 0.030 3.970 4 C -0.151 4.151 5 C -0.150 4.150 6 C -0.089 4.089 7 C -0.179 4.179 8 C 0.294 3.706 9 O -0.430 6.430 10 N -0.357 5.357 11 C 0.023 3.977 12 H 0.095 0.905 13 C -0.182 4.182 14 C 0.048 3.952 15 H 0.169 0.831 16 C -0.178 4.178 17 C -0.167 4.167 18 C 0.016 3.984 19 H 0.105 0.895 20 N -0.312 5.312 21 C -0.342 4.342 22 H 0.095 0.905 23 C -0.206 4.206 24 N -0.568 5.568 25 Si 0.746 3.254 26 H -0.213 1.213 27 H -0.216 1.216 28 H -0.213 1.213 29 C -0.155 4.155 30 C -0.174 4.174 31 H 0.101 0.899 32 H 0.059 0.941 33 H 0.058 0.942 34 H 0.076 0.924 35 H 0.085 0.915 36 H 0.089 0.911 37 H 0.087 0.913 38 H 0.082 0.918 39 H 0.098 0.902 40 H 0.108 0.892 41 H 0.109 0.891 42 H 0.236 0.764 43 H 0.076 0.924 44 H 0.070 0.930 45 H 0.074 0.926 46 H 0.066 0.934 47 H 0.070 0.930 48 H 0.075 0.925 49 H 0.065 0.935 50 H 0.108 0.892 51 H 0.073 0.927 52 H 0.089 0.911 53 H 0.078 0.922 Dipole moment (debyes) X Y Z Total from point charges -3.192 -16.817 -6.197 18.205 hybrid contribution -0.075 1.300 -0.964 1.620 sum -3.266 -15.517 -7.161 17.399 Atomic orbital electron populations 1.22758 0.81401 1.02459 0.99915 1.87890 1.19394 1.28388 1.95130 1.22240 0.94769 0.83923 0.96041 1.21550 0.95388 0.97738 1.00398 1.21588 1.00937 0.95798 0.96713 1.20906 0.97433 0.95215 0.95305 1.21748 1.02638 0.98598 0.94949 1.20581 0.77262 0.81559 0.91152 1.90620 1.53249 1.52507 1.46610 1.46068 1.62065 1.17345 1.10200 1.22580 0.97136 0.96478 0.81475 0.90518 1.23443 0.96952 0.98845 0.98970 1.23744 0.92906 0.93853 0.84727 0.83076 1.23107 0.97227 0.98849 0.98571 1.22910 0.98371 0.98794 0.96648 1.23246 0.92605 0.87568 0.95007 0.89485 1.46628 1.31898 1.19718 1.32978 1.18952 1.11729 0.97406 1.06150 0.90496 1.24698 0.98068 0.98692 0.99146 1.69451 1.19623 1.32386 1.35303 0.86146 0.77068 0.81706 0.80490 1.21304 1.21634 1.21309 1.21681 0.95159 0.95646 1.03033 1.21983 1.01205 0.97812 0.96360 0.89875 0.94058 0.94226 0.92368 0.91533 0.91056 0.91264 0.91758 0.90230 0.89203 0.89089 0.76404 0.92367 0.92984 0.92646 0.93358 0.93038 0.92487 0.93495 0.89176 0.92685 0.91110 0.92212 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 0.25 10.82 101.05 1.09 1.35 16 2 O -0.39 -4.29 10.35 -35.23 -0.36 -4.65 16 3 C 0.09 0.89 2.61 -26.73 -0.07 0.82 16 4 C -0.11 -1.06 5.57 -26.73 -0.15 -1.21 16 5 C -0.11 -1.01 5.20 -26.73 -0.14 -1.14 16 6 C -0.07 -0.78 1.84 -90.62 -0.17 -0.94 16 7 C -0.14 -1.61 5.17 -27.88 -0.14 -1.76 16 8 C 0.51 7.96 7.55 -10.98 -0.08 7.87 16 9 O -0.55 -10.20 13.65 5.56 0.08 -10.12 16 10 N -0.71 -11.71 5.09 -51.40 -0.26 -11.97 16 11 C 0.13 2.38 2.75 -65.44 -0.18 2.20 16 12 H 0.08 1.43 7.30 -51.93 -0.38 1.05 16 13 C -0.14 -2.87 6.22 -24.24 -0.15 -3.03 16 14 C 0.15 3.48 4.72 -62.80 -0.30 3.18 16 15 H 0.15 3.93 5.52 -51.93 -0.29 3.64 16 16 C -0.14 -2.72 6.45 -24.07 -0.16 -2.88 16 17 C -0.13 -2.29 6.46 -24.07 -0.16 -2.45 16 18 C 0.12 2.37 5.07 -62.55 -0.32 2.06 16 19 H 0.09 1.56 8.14 -51.93 -0.42 1.14 16 20 N -0.59 -13.76 2.99 -145.48 -0.44 -14.19 16 21 C -0.21 -5.51 10.59 -15.06 -0.16 -5.66 16 22 H 0.08 1.90 7.83 -52.48 -0.41 1.49 16 23 C -0.01 -0.27 5.50 -17.43 -0.10 -0.37 16 24 N -0.92 -25.50 10.47 55.49 0.58 -24.92 16 25 Si 0.92 21.10 29.55 -169.99 -5.02 16.08 16 26 H -0.29 -6.48 7.11 56.52 0.40 -6.08 16 27 H -0.29 -6.84 7.11 56.52 0.40 -6.44 16 28 H -0.29 -6.58 7.11 56.52 0.40 -6.18 16 29 C -0.12 -1.43 4.94 -26.73 -0.13 -1.56 16 30 C -0.14 -1.52 5.54 -26.73 -0.15 -1.67 16 31 H 0.08 0.55 8.14 -51.93 -0.42 0.12 16 32 H 0.04 0.32 7.87 -51.93 -0.41 -0.09 16 33 H 0.04 0.28 8.08 -51.93 -0.42 -0.14 16 34 H 0.06 0.55 7.79 -51.93 -0.40 0.15 16 35 H 0.07 0.57 8.14 -51.93 -0.42 0.15 16 36 H 0.07 0.71 8.14 -51.93 -0.42 0.28 16 37 H 0.07 0.55 8.14 -51.93 -0.42 0.12 16 38 H 0.06 0.54 8.14 -51.93 -0.42 0.12 16 39 H 0.08 1.00 7.95 -51.93 -0.41 0.58 16 40 H 0.09 0.87 8.14 -51.93 -0.42 0.45 16 41 H 0.09 0.99 8.14 -51.93 -0.42 0.57 16 42 H 0.40 6.43 8.64 -40.82 -0.35 6.07 16 43 H 0.06 1.28 7.98 -51.93 -0.41 0.86 16 44 H 0.05 1.00 7.82 -51.93 -0.41 0.59 16 45 H 0.05 1.15 8.14 -51.93 -0.42 0.72 16 46 H 0.05 0.85 7.82 -51.93 -0.41 0.45 16 47 H 0.05 0.82 7.82 -51.93 -0.41 0.42 16 48 H 0.06 1.02 8.14 -51.93 -0.42 0.59 16 49 H 0.25 6.93 8.31 -40.82 -0.34 6.59 16 50 H 0.09 1.35 5.95 -51.93 -0.31 1.04 16 51 H 0.05 0.63 8.14 -51.93 -0.42 0.21 16 52 H 0.07 0.86 8.14 -51.93 -0.42 0.43 16 53 H 0.06 0.65 7.87 -51.93 -0.41 0.24 16 LS Contribution 402.67 15.07 6.07 6.07 Total: -1.00 -29.29 402.67 -10.44 -39.73 By element: Atomic # 1 Polarization: 18.79 SS G_CDS: -9.63 Total: 9.15 kcal Atomic # 6 Polarization: -3.73 SS G_CDS: -1.45 Total: -5.18 kcal Atomic # 7 Polarization: -50.96 SS G_CDS: -0.12 Total: -51.08 kcal Atomic # 8 Polarization: -14.49 SS G_CDS: -0.29 Total: -14.78 kcal Atomic # 14 Polarization: 21.10 SS G_CDS: -5.02 Total: 16.08 kcal Total LS contribution 6.07 Total: 6.07 kcal Total: -29.29 -10.44 -39.73 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. ZINC001098511549.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 -24.516 kcal (2) G-P(sol) polarization free energy of solvation -29.288 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -53.804 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -10.443 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -39.731 kcal (6) G-S(sol) free energy of system = (1) + (5) -64.247 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.89 seconds