Wall clock time and date at job start Tue Mar 31 2020 20:27:02 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 1.53002 * 1 3 3 C 1.53004 * 109.46917 * 2 1 4 4 H 1.09001 * 109.47231 * 304.99916 * 3 2 1 5 5 C 1.53000 * 109.46859 * 185.00183 * 3 2 1 6 6 N 1.46492 * 109.47438 * 65.00030 * 3 2 1 7 7 C 1.46820 * 124.36400 * 239.99993 * 6 3 2 8 8 C 1.54568 * 105.49042 * 163.09617 * 7 6 3 9 9 C 1.54210 * 101.66589 * 25.03991 * 8 7 6 10 10 C 1.52499 * 109.96022 * 94.44139 * 9 8 7 11 11 C 1.53266 * 109.43163 * 181.74388 * 10 9 8 12 12 N 1.46924 * 108.73455 * 306.19360 * 11 10 9 13 13 C 1.34774 * 120.60856 * 234.13129 * 12 11 10 14 14 O 1.21283 * 120.00037 * 359.97438 * 13 12 11 15 15 C 1.50701 * 120.00241 * 180.02562 * 13 12 11 16 16 C 1.52998 * 109.47231 * 180.02562 * 15 13 12 17 17 C 1.50707 * 109.46953 * 179.97438 * 16 15 13 18 18 H 1.07998 * 120.00187 * 0.02562 * 17 16 15 19 19 C 1.37877 * 119.99621 * 179.97438 * 17 16 15 20 20 N 1.31511 * 120.00124 * 0.02562 * 19 17 16 21 21 Si 1.86806 * 119.99866 * 180.02562 * 19 17 16 22 22 H 1.48504 * 109.47143 * 59.99927 * 21 19 17 23 23 H 1.48495 * 109.47326 * 179.97438 * 21 19 17 24 24 H 1.48501 * 109.46756 * 300.00176 * 21 19 17 25 25 C 1.46932 * 118.78892 * 54.15419 * 12 11 10 26 26 C 1.52497 * 109.96017 * 216.75559 * 9 8 7 27 27 C 1.34571 * 124.36027 * 60.03859 * 6 3 2 28 28 O 1.21276 * 125.01883 * 0.66312 * 27 6 3 29 29 H 1.09000 * 109.46993 * 59.99724 * 1 2 3 30 30 H 1.08996 * 109.47388 * 180.02562 * 1 2 3 31 31 H 1.09003 * 109.47193 * 300.00314 * 1 2 3 32 32 H 1.08993 * 109.47030 * 240.00225 * 2 1 3 33 33 H 1.09003 * 109.47003 * 119.99735 * 2 1 3 34 34 H 1.09001 * 109.46981 * 299.99886 * 5 3 2 35 35 H 1.09004 * 109.47416 * 59.99769 * 5 3 2 36 36 H 1.08996 * 109.47338 * 179.97438 * 5 3 2 37 37 H 1.09003 * 110.23862 * 44.08893 * 7 6 3 38 38 H 1.09000 * 110.23600 * 282.10627 * 7 6 3 39 39 H 1.08993 * 110.98950 * 266.94720 * 8 7 6 40 40 H 1.09005 * 110.98955 * 143.12943 * 8 7 6 41 41 H 1.09006 * 109.47836 * 61.75635 * 10 9 8 42 42 H 1.08999 * 109.48614 * 301.73457 * 10 9 8 43 43 H 1.08998 * 109.59882 * 65.97107 * 11 10 9 44 44 H 1.09008 * 109.59366 * 186.42660 * 11 10 9 45 45 H 1.09007 * 109.46912 * 299.99918 * 15 13 12 46 46 H 1.08999 * 109.47304 * 60.00009 * 15 13 12 47 47 H 1.08993 * 109.47020 * 299.99645 * 16 15 13 48 48 H 1.08998 * 109.47161 * 60.00292 * 16 15 13 49 49 H 0.97002 * 119.99561 * 179.97438 * 20 19 17 50 50 H 1.09001 * 109.59279 * 186.07174 * 25 12 11 51 51 H 1.09004 * 109.71453 * 65.70296 * 25 12 11 52 52 H 1.09001 * 109.47556 * 298.25243 * 26 9 8 53 53 H 1.09003 * 109.47890 * 58.27100 * 26 9 8 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 1.5300 0.0000 0.0000 3 6 2.0400 1.4426 0.0000 4 1 1.6054 1.9816 -0.8418 5 6 3.5648 1.4444 -0.1258 6 7 1.6525 2.0976 1.2517 7 6 0.8073 3.2953 1.3332 8 6 0.3212 3.3587 2.7991 9 6 1.4329 2.5792 3.5302 10 6 2.4839 3.5475 4.0625 11 6 3.6041 2.7577 4.7483 12 7 3.0079 1.8753 5.7606 13 6 3.4331 1.9118 7.0389 14 8 4.3161 2.6777 7.3626 15 6 2.8123 1.0003 8.0659 16 6 3.4705 1.2411 9.4260 17 6 2.8492 0.3300 10.4531 18 1 2.0638 -0.3529 10.1646 19 6 3.2842 0.3675 11.7609 20 7 4.2410 1.1987 12.1121 21 14 2.5147 -0.7624 13.0340 22 1 2.7184 -2.1765 12.6285 23 1 3.1542 -0.5295 14.3537 24 1 1.0600 -0.4801 13.1314 25 6 1.9398 0.9520 5.3537 26 6 0.8316 1.7546 4.6633 27 6 2.0259 1.6793 2.4751 28 8 2.7351 0.7207 2.6964 29 1 -0.3633 0.5139 -0.8900 30 1 -0.3634 -1.0276 0.0005 31 1 -0.3634 0.5139 0.8900 32 1 1.8933 -0.5138 -0.8900 33 1 1.8933 -0.5138 0.8900 34 1 3.9994 0.9053 0.7161 35 1 3.8532 0.9570 -1.0572 36 1 3.9281 2.4720 -0.1262 37 1 -0.0430 3.2035 0.6574 38 1 1.3890 4.1845 1.0898 39 1 -0.6427 2.8627 2.9125 40 1 0.2718 4.3895 3.1499 41 1 2.0232 4.2243 4.7821 42 1 2.8992 4.1238 3.2358 43 1 4.1350 2.1587 4.0084 44 1 4.2974 3.4484 5.2284 45 1 1.7446 1.2075 8.1376 46 1 2.9618 -0.0376 7.7683 47 1 4.5382 1.0342 9.3546 48 1 3.3206 2.2790 9.7234 49 1 4.5467 1.2252 13.0323 50 1 1.5349 0.4511 6.2331 51 1 2.3389 0.2100 4.6619 52 1 0.3604 2.4200 5.3866 53 1 0.0855 1.0705 4.2588 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 ZINC001269992204.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 20:27:02 Heat of formation + Delta-G solvation = -85.723501 kcal Electronic energy + Delta-G solvation = -30980.861071 eV Core-core repulsion = 27044.637614 eV Total energy + Delta-G solvation = -3936.223457 eV No. of doubly occupied orbitals = 65 Molecular weight (most abundant/longest-lived isotopes) = 336.220 amu Computer time = 0.86 seconds Orbital eigenvalues (eV) -41.62812 -39.31315 -37.30874 -36.72057 -35.19903 -33.45062 -32.45246 -31.59631 -30.59438 -30.41293 -28.86620 -26.52221 -25.48027 -24.31759 -23.41309 -22.96474 -22.16455 -21.43097 -20.68197 -18.92667 -18.21519 -17.09175 -16.56732 -16.45951 -15.76162 -15.60471 -15.36190 -15.07376 -14.63636 -14.44093 -14.35591 -14.23238 -13.94173 -13.75213 -13.59887 -13.41498 -13.28127 -12.98043 -12.61166 -12.53667 -12.45610 -12.31055 -12.09639 -12.07251 -11.89039 -11.75660 -11.44381 -11.32065 -11.24763 -11.19332 -11.09138 -10.86717 -10.69534 -10.67443 -10.53511 -9.87540 -9.55711 -9.48654 -9.09788 -8.95348 -8.87348 -8.27997 -8.16478 -5.90521 -3.94625 2.42933 2.65957 3.34680 3.38058 3.41647 3.43263 3.47121 3.93734 4.09448 4.33417 4.39609 4.51563 4.58041 4.62132 4.72137 4.78406 4.92695 4.99078 5.02393 5.07923 5.20009 5.26067 5.28328 5.33061 5.34165 5.39802 5.44134 5.49011 5.53889 5.57086 5.59986 5.63799 5.65616 5.76531 5.80068 5.82444 5.91223 5.94415 6.02648 6.07932 6.21178 6.30603 6.33451 6.41454 6.87607 6.90284 7.02173 7.80441 7.92392 7.94294 8.04510 8.14094 8.45342 8.88207 9.14051 9.68394 11.20476 Molecular weight = 336.22amu Principal moments of inertia in cm(-1) A = 0.021206 B = 0.002461 C = 0.002393 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1320.067286 B =11373.338858 C =11697.413000 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.147 4.147 2 C -0.142 4.142 3 C 0.158 3.842 4 H 0.084 0.916 5 C -0.169 4.169 6 N -0.617 5.617 7 C 0.103 3.897 8 C -0.127 4.127 9 C -0.091 4.091 10 C -0.110 4.110 11 C 0.110 3.890 12 N -0.617 5.617 13 C 0.513 3.487 14 O -0.539 6.539 15 C -0.128 4.128 16 C 0.038 3.962 17 C -0.526 4.526 18 H 0.055 0.945 19 C 0.058 3.942 20 N -0.890 5.890 21 Si 0.892 3.108 22 H -0.277 1.277 23 H -0.288 1.288 24 H -0.277 1.277 25 C 0.100 3.900 26 C -0.112 4.112 27 C 0.532 3.468 28 O -0.511 6.511 29 H 0.050 0.950 30 H 0.054 0.946 31 H 0.053 0.947 32 H 0.071 0.929 33 H 0.081 0.919 34 H 0.074 0.926 35 H 0.065 0.935 36 H 0.055 0.945 37 H 0.076 0.924 38 H 0.069 0.931 39 H 0.084 0.916 40 H 0.092 0.908 41 H 0.080 0.920 42 H 0.072 0.928 43 H 0.066 0.934 44 H 0.091 0.909 45 H 0.078 0.922 46 H 0.078 0.922 47 H 0.023 0.977 48 H 0.023 0.977 49 H 0.261 0.739 50 H 0.089 0.911 51 H 0.089 0.911 52 H 0.078 0.922 53 H 0.074 0.926 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -11.030 3.984 -30.426 32.608 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 -0.205 4.205 2 C -0.180 4.180 3 C 0.056 3.944 4 H 0.102 0.898 5 C -0.227 4.227 6 N -0.352 5.352 7 C -0.020 4.020 8 C -0.164 4.164 9 C -0.094 4.094 10 C -0.149 4.149 11 C -0.013 4.013 12 N -0.352 5.352 13 C 0.303 3.697 14 O -0.415 6.415 15 C -0.168 4.168 16 C 0.000 4.000 17 C -0.564 4.564 18 H 0.073 0.927 19 C -0.144 4.144 20 N -0.529 5.529 21 Si 0.720 3.280 22 H -0.203 1.203 23 H -0.213 1.213 24 H -0.203 1.203 25 C -0.023 4.023 26 C -0.150 4.150 27 C 0.319 3.681 28 O -0.386 6.386 29 H 0.069 0.931 30 H 0.073 0.927 31 H 0.072 0.928 32 H 0.090 0.910 33 H 0.099 0.901 34 H 0.093 0.907 35 H 0.084 0.916 36 H 0.075 0.925 37 H 0.094 0.906 38 H 0.088 0.912 39 H 0.103 0.897 40 H 0.110 0.890 41 H 0.099 0.901 42 H 0.091 0.909 43 H 0.084 0.916 44 H 0.109 0.891 45 H 0.096 0.904 46 H 0.096 0.904 47 H 0.041 0.959 48 H 0.041 0.959 49 H 0.071 0.929 50 H 0.107 0.893 51 H 0.107 0.893 52 H 0.097 0.903 53 H 0.092 0.908 Dipole moment (debyes) X Y Z Total from point charges -10.023 3.905 -30.037 31.905 hybrid contribution -0.569 -0.492 0.490 0.897 sum -10.591 3.414 -29.547 31.573 Atomic orbital electron populations 1.21714 0.95607 1.01675 1.01471 1.21955 0.96306 0.96124 1.03607 1.20975 0.95242 0.93303 0.84909 0.89769 1.22185 0.94949 1.02418 1.03141 1.48459 1.51613 1.29042 1.06094 1.22104 0.94295 0.87728 0.97849 1.22736 0.98244 1.02020 0.93435 1.21042 0.96710 0.96399 0.95282 1.21759 0.95944 0.96870 1.00318 1.21461 0.95119 0.93624 0.91117 1.48139 1.38564 1.39977 1.08544 1.21542 0.82362 0.83720 0.82074 1.90642 1.30988 1.40338 1.79503 1.21862 1.00700 0.97700 0.96502 1.18893 0.96135 0.97517 0.87436 1.21199 1.20212 1.21320 0.93695 0.92696 1.25023 0.95111 0.95690 0.98560 1.69992 1.28083 1.36758 1.18070 0.86663 0.79381 0.81219 0.80721 1.20260 1.21317 1.20277 1.21878 0.87455 0.92330 1.00639 1.21756 0.98015 0.98967 0.96301 1.20541 0.79696 0.84211 0.83623 1.90663 1.36855 1.27904 1.83161 0.93086 0.92703 0.92781 0.91037 0.90083 0.90739 0.91610 0.92548 0.90559 0.91249 0.89749 0.88971 0.90138 0.90924 0.91574 0.89056 0.90417 0.90352 0.95874 0.95900 0.92946 0.89280 0.89342 0.90340 0.90758 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 -0.15 -0.96 9.80 37.16 0.36 -0.59 16 2 C -0.14 -1.06 5.36 -26.73 -0.14 -1.20 16 3 C 0.16 1.10 2.87 -67.93 -0.19 0.91 16 4 H 0.08 0.43 8.07 -51.93 -0.42 0.01 16 5 C -0.17 -1.31 9.20 37.16 0.34 -0.96 16 6 N -0.62 -4.77 2.29 -164.90 -0.38 -5.15 16 7 C 0.10 0.54 7.31 -3.04 -0.02 0.51 16 8 C -0.13 -0.73 6.20 -25.27 -0.16 -0.88 16 9 C -0.09 -0.83 0.55 -155.48 -0.08 -0.92 16 10 C -0.11 -1.14 4.77 -26.85 -0.13 -1.27 16 11 C 0.11 1.59 6.02 -3.67 -0.02 1.56 16 12 N -0.62 -10.10 2.96 -172.67 -0.51 -10.61 16 13 C 0.51 10.73 7.70 -10.99 -0.08 10.65 16 14 O -0.54 -13.43 15.39 5.55 0.09 -13.35 16 15 C -0.13 -2.76 3.98 -27.88 -0.11 -2.87 16 16 C 0.04 1.05 4.26 -27.88 -0.12 0.93 16 17 C -0.53 -15.30 9.11 -34.44 -0.31 -15.61 16 18 H 0.05 1.50 7.74 -52.49 -0.41 1.10 16 19 C 0.06 1.71 5.46 -17.82 -0.10 1.62 16 20 N -0.89 -28.00 13.29 55.43 0.74 -27.26 16 21 Si 0.89 22.07 29.54 -169.99 -5.02 17.05 16 22 H -0.28 -6.70 7.11 56.52 0.40 -6.30 16 23 H -0.29 -7.05 7.11 56.52 0.40 -6.65 16 24 H -0.28 -6.66 7.11 56.52 0.40 -6.26 16 25 C 0.10 1.35 5.91 -3.67 -0.02 1.32 16 26 C -0.11 -1.14 4.79 -26.85 -0.13 -1.27 16 27 C 0.53 5.57 5.61 -11.02 -0.06 5.50 16 28 O -0.51 -7.02 11.24 5.56 0.06 -6.96 16 29 H 0.05 0.27 8.14 -51.93 -0.42 -0.16 16 30 H 0.05 0.36 8.14 -51.93 -0.42 -0.07 16 31 H 0.05 0.39 7.75 -51.93 -0.40 -0.01 16 32 H 0.07 0.45 8.14 -51.93 -0.42 0.03 16 33 H 0.08 0.83 6.67 -51.93 -0.35 0.49 16 34 H 0.07 0.79 6.77 -51.93 -0.35 0.44 16 35 H 0.06 0.41 8.14 -51.93 -0.42 -0.02 16 36 H 0.06 0.42 8.14 -51.93 -0.42 0.00 16 37 H 0.08 0.28 8.14 -51.93 -0.42 -0.14 16 38 H 0.07 0.31 8.14 -51.93 -0.42 -0.11 16 39 H 0.08 0.43 7.88 -51.93 -0.41 0.02 16 40 H 0.09 0.43 7.87 -51.93 -0.41 0.03 16 41 H 0.08 0.84 8.14 -51.93 -0.42 0.42 16 42 H 0.07 0.63 8.14 -51.93 -0.42 0.21 16 43 H 0.07 0.99 6.84 -51.93 -0.36 0.64 16 44 H 0.09 1.47 7.00 -51.92 -0.36 1.11 16 45 H 0.08 1.52 7.70 -51.92 -0.40 1.12 16 46 H 0.08 1.59 7.93 -51.93 -0.41 1.18 16 47 H 0.02 0.70 8.10 -51.93 -0.42 0.28 16 48 H 0.02 0.69 8.10 -51.93 -0.42 0.27 16 49 H 0.26 7.71 8.31 -40.82 -0.34 7.37 16 50 H 0.09 1.19 5.92 -51.93 -0.31 0.88 16 51 H 0.09 1.28 5.87 -51.93 -0.30 0.97 16 52 H 0.08 0.78 8.14 -51.93 -0.42 0.36 16 53 H 0.07 0.65 8.13 -51.93 -0.42 0.23 16 LS Contribution 402.99 15.07 6.07 6.07 Total: -1.00 -35.89 402.99 -9.45 -45.34 By element: Atomic # 1 Polarization: 6.95 SS G_CDS: -9.51 Total: -2.56 kcal Atomic # 6 Polarization: -1.58 SS G_CDS: -0.98 Total: -2.56 kcal Atomic # 7 Polarization: -42.87 SS G_CDS: -0.15 Total: -43.02 kcal Atomic # 8 Polarization: -20.45 SS G_CDS: 0.15 Total: -20.31 kcal Atomic # 14 Polarization: 22.07 SS G_CDS: -5.02 Total: 17.05 kcal Total LS contribution 6.07 Total: 6.07 kcal Total: -35.89 -9.45 -45.34 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. ZINC001269992204.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 -40.388 kcal (2) G-P(sol) polarization free energy of solvation -35.886 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -76.275 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -9.449 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -45.335 kcal (6) G-S(sol) free energy of system = (1) + (5) -85.724 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.86 seconds