Wall clock time and date at job start Tue Mar 9 2021 13:40:00 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= 0 * 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 1.42893 * 1 3 3 C 1.35901 * 117.00272 * 2 1 4 4 C 1.38613 * 120.02983 * 179.97438 * 3 2 1 5 5 C 1.38654 * 119.89168 * 180.02562 * 4 3 2 6 6 O 1.35892 * 120.02709 * 179.97438 * 5 4 3 7 7 C 1.42902 * 117.00314 * 0.02562 * 6 5 4 8 8 C 1.50697 * 109.47413 * 180.02562 * 7 6 5 9 9 O 1.21282 * 120.00099 * 359.97438 * 8 7 6 10 10 N 1.34778 * 120.00026 * 180.02562 * 8 7 6 11 11 C 1.46494 * 120.00062 * 179.97438 * 10 8 7 12 12 C 1.50710 * 112.85107 * 50.32925 * 11 10 8 13 13 C 1.38436 * 120.00837 * 73.93092 * 12 11 10 14 14 F 1.35096 * 120.02845 * 0.04063 * 13 12 11 15 15 C 1.38483 * 119.94229 * 180.32304 * 13 12 11 16 16 C 1.38173 * 119.97526 * 359.42379 * 15 13 12 17 17 C 1.38262 * 120.02766 * 0.29802 * 16 15 13 18 18 C 1.38215 * 120.01276 * 253.69876 * 12 11 10 19 19 C 1.53785 * 113.69110 * 279.06321 * 11 10 8 20 20 C 1.53777 * 87.08126 * 270.87145 * 19 11 10 21 21 H 1.08996 * 113.69062 * 220.00867 * 20 19 11 22 22 O 1.42903 * 113.61484 * 89.11299 * 20 19 11 23 23 C 1.53777 * 113.61659 * 181.52887 * 11 10 8 24 24 C 1.38760 * 119.94416 * 0.25285 * 5 4 3 25 25 C 1.50695 * 119.97193 * 179.74800 * 24 5 4 26 26 O 1.42907 * 109.47108 * 74.99808 * 25 24 5 27 27 Si 1.86292 * 109.47310 * 195.00122 * 25 24 5 28 28 C 1.38199 * 120.05136 * 359.49593 * 24 5 4 29 29 C 1.38145 * 120.11162 * 0.50552 * 28 24 5 30 30 H 1.08997 * 109.47159 * 179.97438 * 1 2 3 31 31 H 1.09001 * 109.47254 * 299.99986 * 1 2 3 32 32 H 1.08998 * 109.47452 * 59.99679 * 1 2 3 33 33 H 1.08000 * 120.05014 * 0.02562 * 4 3 2 34 34 H 1.08995 * 109.47370 * 59.99592 * 7 6 5 35 35 H 1.09002 * 109.46540 * 299.99790 * 7 6 5 36 36 H 0.96994 * 119.99940 * 359.97438 * 10 8 7 37 37 H 1.08001 * 120.01380 * 179.69662 * 15 13 12 38 38 H 1.08008 * 119.98591 * 180.27777 * 16 15 13 39 39 H 1.08001 * 119.97588 * 179.97438 * 17 16 15 40 40 H 1.08004 * 119.98804 * 0.02562 * 18 12 11 41 41 H 1.09003 * 113.61461 * 25.42018 * 19 11 10 42 42 H 1.09004 * 113.61530 * 156.32297 * 19 11 10 43 43 H 0.96703 * 113.99566 * 82.50678 * 22 20 19 44 44 H 1.09004 * 113.61393 * 203.74793 * 23 11 10 45 45 H 1.09002 * 113.61187 * 334.56734 * 23 11 10 46 46 H 1.09006 * 109.47154 * 315.00634 * 25 24 5 47 47 H 0.96696 * 113.99798 * 179.97438 * 26 25 24 48 48 H 1.48504 * 110.00069 * 300.00282 * 27 25 24 49 49 H 1.48503 * 109.99931 * 61.31692 * 27 25 24 50 50 H 1.07996 * 119.93980 * 180.25468 * 28 24 5 51 51 H 1.08004 * 119.97721 * 179.72593 * 29 28 24 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 1.4289 0.0000 0.0000 3 6 2.0460 1.2109 0.0000 4 6 3.4302 1.2841 0.0005 5 6 4.0567 2.5210 0.0011 6 8 5.4136 2.5959 0.0021 7 6 6.1316 1.3604 0.0021 8 6 7.6125 1.6400 0.0039 9 8 8.0135 2.7846 0.0047 10 7 8.4912 0.6181 0.0037 11 6 9.9307 0.8899 0.0050 12 6 10.3406 1.8687 1.0751 13 6 10.3770 1.4705 2.4004 14 9 10.0461 0.2042 2.7352 15 6 10.7474 2.3729 3.3834 16 6 11.0915 3.6661 3.0391 17 6 11.0603 4.0610 1.7145 18 6 10.6848 3.1629 0.7331 19 6 10.4977 1.2237 -1.3850 20 6 10.7291 -0.2857 -1.5665 21 1 11.6696 -0.5283 -2.0612 22 8 9.6110 -0.9722 -2.1328 23 6 10.7974 -0.3799 -0.0331 24 6 3.2971 3.6822 0.0064 25 6 3.9774 5.0268 0.0127 26 8 4.5038 5.3004 -1.2874 27 14 2.7440 6.3447 0.4733 28 6 1.9172 3.6065 0.0006 29 6 1.2906 2.3753 0.0001 30 1 -0.3633 -1.0276 -0.0005 31 1 -0.3634 0.5138 0.8900 32 1 -0.3634 0.5139 -0.8899 33 1 4.0196 0.3791 0.0005 34 1 5.8706 0.7885 -0.8883 35 1 5.8693 0.7878 0.8916 36 1 8.1705 -0.2973 0.0027 37 1 10.7715 2.0648 4.4182 38 1 11.3847 4.3688 3.8051 39 1 11.3290 5.0721 1.4463 40 1 10.6596 3.4728 -0.3012 41 1 9.7581 1.6376 -2.0704 42 1 11.4188 1.8058 -1.3526 43 1 9.5626 -0.9166 -3.0971 44 1 11.8003 -0.2361 0.3689 45 1 10.3002 -1.2602 0.3742 46 1 4.7899 5.0195 0.7394 47 1 4.9563 6.1521 -1.3572 48 1 1.6312 6.3648 -0.5099 49 1 2.2128 6.0891 1.8363 50 1 1.3278 4.5114 0.0006 51 1 0.2120 2.3187 0.0000 There are 74 doubly filled levels RHF calculation, no. of doubly occupied orbitals= 74 No. of singly occupied orbitals= 1 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) F: (AM1): M.J.S. DEWAR AND E. G. ZOEBISCH, THEOCHEM, 180, 1 (1988). 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=0 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 s_22_17639084_4974312.mol2 51 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED SCF FIELD WAS ACHIEVED Wall clock time and date at job start Tue Mar 9 2021 13:40:00 Heat of formation + Delta-G solvation = -124.391040 kcal Electronic energy + Delta-G solvation = -39613.444699 eV Core-core repulsion = 34361.915535 eV Total energy + Delta-G solvation = -5251.529164 eV No. of doubly occupied orbitals = 74 and no. of open levels = 1 Molecular weight (most abundant/longest-lived isotopes) = 404.156 amu Computer time = 1.34 seconds Orbital eigenvalues (eV) -49.74805 -42.03906 -41.61239 -40.26744 -39.40058 -39.21872 -38.00944 -36.87276 -36.26477 -34.00346 -32.34205 -31.96582 -31.41180 -31.25652 -29.37914 -28.48366 -27.17036 -25.96397 -25.77887 -23.79852 -23.44788 -22.76427 -22.30195 -21.65925 -20.47380 -19.84540 -18.81236 -18.50116 -18.20954 -18.18687 -17.71577 -17.39200 -17.34069 -17.18744 -17.02943 -16.73735 -16.71177 -16.56426 -16.39241 -15.69653 -15.56957 -15.52914 -15.26483 -15.15634 -15.01613 -14.83773 -14.45870 -14.13070 -13.94999 -13.75138 -13.73289 -13.65922 -13.42384 -13.39174 -13.35687 -13.11349 -13.06407 -12.66542 -12.54311 -12.39372 -12.15359 -12.06892 -11.86742 -11.75039 -11.63004 -11.56388 -10.97925 -10.83032 -10.06365 -10.05655 -9.75054 -9.66402 -9.53573 -9.04649 -4.89251 0.21943 0.22959 0.36243 0.36740 1.40451 1.47961 1.61206 1.71574 2.03480 2.17263 2.53066 2.59524 2.76550 2.91759 3.21323 3.37101 3.45981 3.47325 3.58351 3.61569 3.68841 3.76547 3.90117 3.96816 3.98746 4.01523 4.04069 4.12427 4.13278 4.16186 4.24089 4.32504 4.36687 4.40985 4.41167 4.50629 4.53003 4.54317 4.64523 4.69021 4.72567 4.86327 4.87661 4.96649 5.04794 5.17483 5.24599 5.25266 5.31751 5.41720 5.46137 5.51789 5.56801 6.00519 6.14951 6.34283 6.47185 6.55004 6.87310 7.22739 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C 0.025 3.975 2 O -0.313 6.313 3 C 0.175 3.825 4 C -0.246 4.246 5 C 0.195 3.805 6 O -0.270 6.270 7 C 0.037 3.963 8 C 0.519 3.481 9 O -0.500 6.500 10 N -0.695 5.695 11 C 0.206 3.794 12 C -0.117 4.117 13 C 0.109 3.891 14 F -0.138 7.138 15 C -0.162 4.162 16 C -0.086 4.086 17 C -0.133 4.133 18 C -0.045 4.045 19 C -0.172 4.172 20 C 0.081 3.919 21 H 0.077 0.923 22 O -0.550 6.550 23 C -0.126 4.126 24 C -0.139 4.139 25 C -0.055 4.055 26 O -0.542 6.542 27 Si 0.680 3.320 28 C -0.043 4.043 29 C -0.239 4.239 30 H 0.104 0.896 31 H 0.058 0.942 32 H 0.059 0.941 33 H 0.140 0.860 34 H 0.096 0.904 35 H 0.093 0.907 36 H 0.408 0.592 37 H 0.134 0.866 38 H 0.132 0.868 39 H 0.130 0.870 40 H 0.132 0.868 41 H 0.083 0.917 42 H 0.102 0.898 43 H 0.385 0.615 44 H 0.111 0.889 45 H 0.089 0.911 46 H 0.073 0.927 47 H 0.378 0.622 48 H -0.251 1.251 49 H -0.255 1.255 50 H 0.131 0.869 51 H 0.135 0.865 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges 1.719 0.001 -0.747 1.874 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 -0.070 4.070 2 O -0.226 6.226 3 C 0.129 3.871 4 C -0.265 4.265 5 C 0.148 3.852 6 O -0.181 6.181 7 C -0.042 4.042 8 C 0.303 3.697 9 O -0.372 6.372 10 N -0.349 5.349 11 C 0.119 3.881 12 C -0.118 4.118 13 C 0.089 3.911 14 F -0.117 7.117 15 C -0.180 4.180 16 C -0.104 4.104 17 C -0.151 4.151 18 C -0.064 4.064 19 C -0.210 4.210 20 C 0.022 3.978 21 H 0.094 0.906 22 O -0.356 6.356 23 C -0.164 4.164 24 C -0.140 4.140 25 C -0.166 4.166 26 O -0.348 6.348 27 Si 0.581 3.419 28 C -0.061 4.061 29 C -0.258 4.258 30 H 0.122 0.878 31 H 0.077 0.923 32 H 0.077 0.923 33 H 0.158 0.842 34 H 0.114 0.886 35 H 0.111 0.889 36 H 0.244 0.756 37 H 0.152 0.848 38 H 0.150 0.850 39 H 0.148 0.852 40 H 0.150 0.850 41 H 0.102 0.898 42 H 0.121 0.879 43 H 0.233 0.767 44 H 0.129 0.871 45 H 0.107 0.893 46 H 0.091 0.909 47 H 0.225 0.775 48 H -0.176 1.176 49 H -0.180 1.180 50 H 0.148 0.852 51 H 0.152 0.848 Dipole moment (debyes) X Y Z Total from point charges 0.969 0.209 -0.002 0.992 hybrid contribution -0.410 -1.269 -0.406 1.394 sum 0.560 -1.060 -0.408 1.266 Atomic orbital electron populations 1.23147 0.77641 1.04438 1.01740 1.86076 1.21989 1.26534 1.88004 1.18658 0.91460 0.84308 0.92690 1.20401 0.92901 0.97364 1.15842 1.18354 0.82116 0.92281 0.92446 1.86227 1.14527 1.29705 1.87663 1.22510 0.90481 0.86996 1.04169 1.19912 0.87047 0.85705 0.77015 1.90766 1.79453 1.20573 1.46453 1.45400 1.04164 1.09464 1.75916 1.19717 0.80612 0.94460 0.93279 1.19654 1.04060 0.96153 0.91978 1.17530 1.00956 0.79764 0.92854 1.91486 1.90107 1.36980 1.93097 1.21126 1.03573 0.94081 0.99266 1.21062 0.97514 0.95072 0.96746 1.21227 1.00973 1.00111 0.92805 1.20850 0.94332 0.90976 1.00237 1.24128 1.02393 0.97870 0.96645 1.22662 0.89416 0.91183 0.94556 0.90555 1.86399 1.47586 1.75421 1.26171 1.23413 1.00947 0.97153 0.94849 1.18544 0.92119 0.92372 1.10939 1.24426 1.04154 0.98906 0.89083 1.86509 1.77019 1.42427 1.28803 0.95293 0.79765 0.87113 0.79691 1.20604 0.92749 0.97495 0.95267 1.21074 1.00435 0.91673 1.12617 0.87781 0.92298 0.92267 0.84184 0.88598 0.88901 0.75577 0.84835 0.85025 0.85224 0.85046 0.89827 0.87940 0.76694 0.87070 0.89278 0.90875 0.77469 1.17613 1.17969 0.85168 0.84756 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 13. 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 -0.02 9.81 101.05 0.99 0.97 16 2 O -0.31 -0.80 10.49 -19.43 -0.20 -1.01 16 3 C 0.17 0.59 6.68 -39.23 -0.26 0.33 16 4 C -0.25 -0.82 8.97 -39.29 -0.35 -1.17 16 5 C 0.19 0.89 6.66 -39.23 -0.26 0.63 16 6 O -0.27 -1.29 8.99 -39.31 -0.35 -1.64 16 7 C 0.04 0.05 5.22 36.00 0.19 0.24 16 8 C 0.52 1.49 7.66 -10.99 -0.08 1.41 16 9 O -0.50 -3.05 14.20 -14.35 -0.20 -3.25 16 10 N -0.70 -0.49 4.76 -47.92 -0.23 -0.72 16 11 C 0.21 0.13 0.61 -132.16 -0.08 0.05 16 12 C -0.12 -0.25 3.89 -104.55 -0.41 -0.66 16 13 C 0.11 0.30 7.10 -39.42 -0.28 0.02 16 14 F -0.14 -0.43 16.14 2.25 0.04 -0.40 16 15 C -0.16 -0.29 10.03 -39.51 -0.40 -0.69 16 16 C -0.09 -0.07 10.04 -39.60 -0.40 -0.47 16 17 C -0.13 -0.14 10.04 -39.58 -0.40 -0.54 16 18 C -0.05 -0.09 7.61 -39.59 -0.30 -0.39 16 19 C -0.17 0.11 6.25 -25.92 -0.16 -0.05 16 20 C 0.08 -0.13 5.28 -25.92 -0.14 -0.27 16 21 H 0.08 -0.22 8.14 -51.93 -0.42 -0.64 16 22 O -0.55 0.76 12.96 -35.23 -0.46 0.30 16 23 C -0.13 0.10 6.26 -25.92 -0.16 -0.07 16 24 C -0.14 -0.64 5.30 -104.45 -0.55 -1.20 16 25 C -0.05 -0.16 2.36 36.00 0.09 -0.08 16 26 O -0.54 -1.82 12.86 -35.23 -0.45 -2.27 16 27 Si 0.68 0.44 30.20 -169.99 -5.13 -4.69 16 28 C -0.04 -0.16 8.65 -39.63 -0.34 -0.50 16 29 C -0.24 -0.67 9.04 -39.41 -0.36 -1.03 16 30 H 0.10 -0.28 8.14 -51.93 -0.42 -0.70 16 31 H 0.06 -0.10 7.66 -51.93 -0.40 -0.50 16 32 H 0.06 -0.10 7.66 -51.93 -0.40 -0.49 16 33 H 0.14 0.17 6.30 -52.49 -0.33 -0.16 16 34 H 0.10 -0.04 7.66 -51.93 -0.40 -0.44 16 35 H 0.09 -0.04 7.66 -51.93 -0.40 -0.44 16 36 H 0.41 -0.37 8.47 -40.82 -0.35 -0.72 16 37 H 0.13 0.04 8.06 -52.49 -0.42 -0.38 16 38 H 0.13 -0.18 8.06 -52.48 -0.42 -0.60 16 39 H 0.13 -0.11 8.06 -52.49 -0.42 -0.53 16 40 H 0.13 0.17 6.84 -52.48 -0.36 -0.19 16 41 H 0.08 0.05 8.14 -51.93 -0.42 -0.37 16 42 H 0.10 -0.16 7.25 -51.93 -0.38 -0.54 16 43 H 0.38 -1.77 9.12 45.56 0.42 -1.35 16 44 H 0.11 -0.16 8.09 -51.93 -0.42 -0.58 16 45 H 0.09 -0.03 8.11 -51.93 -0.42 -0.45 16 46 H 0.07 0.22 7.82 -51.93 -0.41 -0.19 16 47 H 0.38 -0.57 8.74 45.56 0.40 -0.17 16 48 H -0.25 -0.71 6.74 56.52 0.38 -0.33 16 49 H -0.26 -0.75 7.11 56.52 0.40 -0.35 16 50 H 0.13 0.35 4.89 -52.49 -0.26 0.09 16 51 H 0.13 0.06 6.29 -52.48 -0.33 -0.27 16 LS Contribution 423.10 15.07 6.38 6.38 Total: 0.00 -11.01 423.10 -10.07 -21.08 By element: Atomic # 1 Polarization: -4.54 SS G_CDS: -5.78 Total: -10.32 kcal Atomic # 6 Polarization: 0.21 SS G_CDS: -3.67 Total: -3.46 kcal Atomic # 7 Polarization: -0.49 SS G_CDS: -0.23 Total: -0.72 kcal Atomic # 8 Polarization: -6.20 SS G_CDS: -1.67 Total: -7.87 kcal Atomic # 9 Polarization: -0.43 SS G_CDS: 0.04 Total: -0.40 kcal Atomic # 14 Polarization: 0.44 SS G_CDS: -5.13 Total: -4.69 kcal Total LS contribution 6.38 Total: 6.38 kcal Total: -11.01 -10.07 -21.08 kcal The number of atoms in the molecule is 51 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. s_22_17639084_4974312.mol2 51 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 -103.308 kcal (2) G-P(sol) polarization free energy of solvation -11.013 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -114.321 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -10.070 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -21.083 kcal (6) G-S(sol) free energy of system = (1) + (5) -124.391 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 1.34 seconds