Wall clock time and date at job start Wed Apr 1 2020 00:28:26 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 1.42903 * 1 3 3 C 1.42895 * 113.99767 * 2 1 4 4 C 1.53003 * 109.47041 * 179.97438 * 3 2 1 5 5 C 1.50704 * 109.54331 * 305.04570 * 4 3 2 6 6 O 1.21278 * 119.99965 * 126.57521 * 5 4 3 7 7 N 1.34775 * 119.99697 * 306.57803 * 5 4 3 8 8 C 1.46920 * 120.63447 * 354.99826 * 7 5 4 9 9 C 1.53196 * 108.89394 * 233.55864 * 8 7 5 10 10 C 1.53066 * 109.29663 * 305.57627 * 9 8 7 11 11 H 1.09001 * 109.34670 * 301.13254 * 10 9 8 12 12 N 1.46496 * 109.45481 * 181.24476 * 10 9 8 13 13 C 1.36934 * 120.00484 * 84.78920 * 12 10 9 14 14 H 1.08003 * 119.99518 * 359.97438 * 13 12 10 15 15 C 1.38806 * 120.00346 * 179.97438 * 13 12 10 16 16 N 1.31614 * 119.99930 * 0.02562 * 15 13 12 17 17 Si 1.86803 * 120.00117 * 179.97438 * 15 13 12 18 18 H 1.48499 * 109.46728 * 90.00237 * 17 15 13 19 19 H 1.48500 * 109.47337 * 210.00043 * 17 15 13 20 20 H 1.48503 * 109.47077 * 330.00410 * 17 15 13 21 21 C 1.53043 * 109.65938 * 61.15261 * 10 9 8 22 22 H 1.08998 * 109.49613 * 58.65177 * 21 10 9 23 23 C 1.52999 * 109.49961 * 178.75203 * 21 10 9 24 24 C 1.46935 * 120.62796 * 175.01842 * 7 5 4 25 25 C 1.53174 * 109.61647 * 65.26471 * 4 3 2 26 26 C 1.53096 * 109.16529 * 176.89028 * 25 4 3 27 27 O 1.42897 * 109.41642 * 302.39705 * 26 25 4 28 28 C 1.42907 * 114.10008 * 61.15418 * 27 26 25 29 29 C 1.53092 * 109.41365 * 298.84423 * 28 27 26 30 30 H 1.09006 * 109.47148 * 180.02562 * 1 2 3 31 31 H 1.08996 * 109.47195 * 299.99753 * 1 2 3 32 32 H 1.08992 * 109.47284 * 60.00538 * 1 2 3 33 33 H 1.09000 * 109.47071 * 60.00278 * 3 2 1 34 34 H 1.08999 * 109.47023 * 299.99769 * 3 2 1 35 35 H 1.08998 * 109.58778 * 353.41910 * 8 7 5 36 36 H 1.09001 * 109.59163 * 113.69862 * 8 7 5 37 37 H 1.08994 * 109.49624 * 65.39271 * 9 8 7 38 38 H 1.08999 * 109.49629 * 185.48263 * 9 8 7 39 39 H 0.97001 * 119.99550 * 264.78560 * 12 10 9 40 40 H 0.97007 * 119.99921 * 180.02562 * 16 15 13 41 41 H 1.09006 * 109.46829 * 179.84049 * 23 21 10 42 42 H 1.08999 * 109.46572 * 299.83243 * 23 21 10 43 43 H 1.08995 * 109.47653 * 59.83474 * 23 21 10 44 44 H 1.08994 * 109.58532 * 246.15839 * 24 7 5 45 45 H 1.08993 * 109.58412 * 6.58302 * 24 7 5 46 46 H 1.09005 * 109.52537 * 296.80162 * 25 4 3 47 47 H 1.09007 * 109.52438 * 56.98957 * 25 4 3 48 48 H 1.09001 * 109.48211 * 182.40820 * 26 25 4 49 49 H 1.08997 * 109.47712 * 62.37483 * 26 25 4 50 50 H 1.08996 * 109.48012 * 178.86600 * 28 27 26 51 51 H 1.08992 * 109.48707 * 58.83139 * 28 27 26 52 52 H 1.09005 * 109.52161 * 297.70032 * 29 28 27 53 53 H 1.09006 * 109.52550 * 177.51452 * 29 28 27 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 1.4290 0.0000 0.0000 3 6 2.0102 1.3054 0.0000 4 6 3.5354 1.1847 0.0006 5 6 3.9732 0.3321 1.1637 6 8 4.6925 -0.6262 0.9763 7 7 3.5651 0.6346 2.4121 8 6 2.7848 1.8524 2.6702 9 6 3.4762 2.6601 3.7731 10 6 3.6801 1.7688 5.0007 11 1 2.7133 1.4012 5.3446 12 7 4.3142 2.5462 6.0682 13 6 3.5475 3.3095 6.9076 14 1 2.4751 3.3387 6.7823 15 6 4.1483 4.0456 7.9194 16 7 5.4552 4.0104 8.0717 17 14 3.1023 5.0875 9.0639 18 1 2.6933 4.2748 10.2376 19 1 3.8891 6.2600 9.5237 20 1 1.8930 5.5557 8.3404 21 6 4.5749 0.5829 4.6330 22 1 5.5330 0.9503 4.2656 23 6 4.8017 -0.2886 5.8699 24 6 3.8927 -0.2471 3.5409 25 6 4.0010 0.5420 -1.3095 26 6 5.5311 0.4971 -1.3314 27 8 6.0474 1.8212 -1.1824 28 6 5.6838 2.4544 0.0460 29 6 4.1598 2.5780 0.1232 30 1 -0.3634 -1.0277 0.0005 31 1 -0.3633 0.5138 0.8900 32 1 -0.3633 0.5137 -0.8900 33 1 1.6886 1.8463 0.8900 34 1 1.6886 1.8463 -0.8900 35 1 2.7284 2.4499 1.7604 36 1 1.7793 1.5808 2.9919 37 1 4.4443 3.0101 3.4151 38 1 2.8559 3.5155 4.0408 39 1 5.2774 2.5201 6.1805 40 1 5.8750 4.5246 8.7791 41 1 5.4367 -1.1346 5.6068 42 1 5.2871 0.3024 6.6466 43 1 3.8430 -0.6543 6.2375 44 1 2.9784 -0.6899 3.9360 45 1 4.5673 -1.0348 3.2055 46 1 3.6057 -0.4715 -1.3787 47 1 3.6419 1.1323 -2.1526 48 1 5.8690 0.0797 -2.2799 49 1 5.8881 -0.1266 -0.5119 50 1 6.1316 3.4472 0.0896 51 1 6.0428 1.8565 0.8836 52 1 3.8039 3.2095 -0.6909 53 1 3.8781 3.0207 1.0787 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 ZINC001319689144.mol2 53 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 00:28:26 Heat of formation + Delta-G solvation = -99.270117 kcal Electronic energy + Delta-G solvation = -33113.824094 eV Core-core repulsion = 28986.557160 eV Total energy + Delta-G solvation = -4127.266934 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.220 amu Computer time = 1.20 seconds Orbital eigenvalues (eV) -41.41286 -38.79760 -37.94683 -37.38024 -35.02855 -34.23595 -32.71724 -31.52017 -31.12202 -29.39718 -28.48927 -26.78093 -25.90922 -25.35519 -23.85455 -23.47551 -22.51933 -21.78485 -21.38653 -19.69718 -18.73921 -17.13358 -17.02908 -16.75269 -16.26602 -16.09793 -15.80816 -15.70818 -15.25674 -14.97929 -14.57776 -14.53256 -14.12309 -14.03203 -13.68855 -13.60553 -13.32011 -13.21860 -12.77274 -12.49106 -12.43060 -12.32669 -12.07810 -12.02694 -11.74047 -11.69791 -11.56669 -11.26684 -11.17385 -10.97060 -10.85401 -10.77334 -10.63750 -10.52376 -10.41043 -10.23218 -9.95091 -9.80885 -9.65539 -9.53549 -9.23862 -8.92976 -8.43016 -7.00325 -5.81342 -3.10184 2.69052 3.05434 3.39061 3.39992 3.44277 3.46249 3.85335 4.17862 4.49555 4.52400 4.56453 4.71296 4.83323 4.90420 5.00089 5.02760 5.14139 5.14933 5.18051 5.22663 5.26443 5.32452 5.37318 5.42484 5.48727 5.48941 5.50660 5.58765 5.63980 5.66738 5.76014 5.77230 5.84432 5.95788 5.97959 6.05831 6.10036 6.14809 6.25439 6.36851 6.40660 6.52038 6.61216 6.77219 6.84215 6.89996 7.01194 7.16906 7.54016 7.64426 8.26951 8.36790 9.48341 10.05730 10.40641 11.41060 Molecular weight = 340.22amu Principal moments of inertia in cm(-1) A = 0.014339 B = 0.003322 C = 0.003193 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1952.197142 B = 8426.912567 C = 8766.485180 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 -0.382 6.382 3 C 0.056 3.944 4 C -0.076 4.076 5 C 0.537 3.463 6 O -0.542 6.542 7 N -0.599 5.599 8 C 0.087 3.913 9 C -0.153 4.153 10 C 0.185 3.815 11 H 0.047 0.953 12 N -0.720 5.720 13 C -0.239 4.239 14 H 0.069 0.931 15 C -0.011 4.011 16 N -0.931 5.931 17 Si 0.904 3.096 18 H -0.290 1.290 19 H -0.292 1.292 20 H -0.283 1.283 21 C -0.109 4.109 22 H 0.068 0.932 23 C -0.136 4.136 24 C 0.121 3.879 25 C -0.122 4.122 26 C 0.045 3.955 27 O -0.385 6.385 28 C 0.063 3.937 29 C -0.158 4.158 30 H 0.086 0.914 31 H 0.042 0.958 32 H 0.040 0.960 33 H 0.073 0.927 34 H 0.058 0.942 35 H 0.093 0.907 36 H 0.065 0.935 37 H 0.060 0.940 38 H 0.076 0.924 39 H 0.384 0.616 40 H 0.255 0.745 41 H 0.043 0.957 42 H 0.073 0.927 43 H 0.050 0.950 44 H 0.064 0.936 45 H 0.088 0.912 46 H 0.085 0.915 47 H 0.072 0.928 48 H 0.089 0.911 49 H 0.083 0.917 50 H 0.099 0.901 51 H 0.053 0.947 52 H 0.085 0.915 53 H 0.096 0.904 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -7.224 -6.074 -18.781 21.019 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 -0.301 6.301 3 C -0.021 4.021 4 C -0.079 4.079 5 C 0.325 3.675 6 O -0.420 6.420 7 N -0.331 5.331 8 C -0.036 4.036 9 C -0.194 4.194 10 C 0.075 3.925 11 H 0.065 0.935 12 N -0.360 5.360 13 C -0.370 4.370 14 H 0.087 0.913 15 C -0.207 4.207 16 N -0.579 5.579 17 Si 0.735 3.265 18 H -0.218 1.218 19 H -0.218 1.218 20 H -0.208 1.208 21 C -0.129 4.129 22 H 0.087 0.913 23 C -0.194 4.194 24 C -0.001 4.001 25 C -0.160 4.160 26 C -0.031 4.031 27 O -0.304 6.304 28 C -0.014 4.014 29 C -0.195 4.195 30 H 0.104 0.896 31 H 0.061 0.939 32 H 0.059 0.941 33 H 0.090 0.910 34 H 0.076 0.924 35 H 0.110 0.890 36 H 0.083 0.917 37 H 0.079 0.921 38 H 0.095 0.905 39 H 0.218 0.782 40 H 0.065 0.935 41 H 0.062 0.938 42 H 0.092 0.908 43 H 0.069 0.931 44 H 0.083 0.917 45 H 0.106 0.894 46 H 0.103 0.897 47 H 0.090 0.910 48 H 0.107 0.893 49 H 0.101 0.899 50 H 0.117 0.883 51 H 0.071 0.929 52 H 0.104 0.896 53 H 0.114 0.886 Dipole moment (debyes) X Y Z Total from point charges -6.749 -6.569 -18.887 21.105 hybrid contribution -0.871 0.894 0.982 1.588 sum -7.620 -5.676 -17.905 20.270 Atomic orbital electron populations 1.22741 0.80830 1.02875 0.99981 1.87933 1.19724 1.27018 1.95386 1.23025 0.91411 0.85817 1.01839 1.20861 0.94767 0.96575 0.95692 1.20064 0.79367 0.84711 0.83347 1.90579 1.37232 1.29951 1.84205 1.48000 1.53933 1.24290 1.06870 1.22449 0.94976 0.85969 1.00161 1.22730 1.00680 0.99668 0.96337 1.20170 0.95062 0.89386 0.87918 0.93547 1.42405 1.06834 1.53628 1.33163 1.19200 0.90765 1.19563 1.07521 0.91296 1.24716 0.95631 1.00890 0.99486 1.69656 1.07953 1.45530 1.34792 0.86240 0.79156 0.79921 0.81137 1.21766 1.21821 1.20833 1.21733 0.99636 0.96588 0.94945 0.91309 1.21653 1.01302 0.98688 0.97711 1.21693 1.00100 0.92797 0.85533 1.21951 0.97432 1.02179 0.94395 1.22939 0.92462 0.84347 1.03347 1.87886 1.74392 1.29511 1.38570 1.22511 0.92928 0.98621 0.87340 1.22568 0.97757 0.94539 1.04648 0.89583 0.93892 0.94107 0.90975 0.92365 0.88955 0.91716 0.92098 0.90534 0.78204 0.93494 0.93825 0.90779 0.93101 0.91742 0.89408 0.89667 0.90984 0.89319 0.89868 0.88269 0.92891 0.89611 0.88623 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 14. 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 0.26 11.01 101.05 1.11 1.37 16 2 O -0.38 -4.33 9.80 -35.23 -0.35 -4.67 16 3 C 0.06 0.55 4.41 37.16 0.16 0.71 16 4 C -0.08 -0.86 0.34 -155.48 -0.05 -0.92 16 5 C 0.54 7.71 4.75 -10.98 -0.05 7.66 16 6 O -0.54 -9.27 13.07 5.56 0.07 -9.19 16 7 N -0.60 -8.30 2.96 -172.77 -0.51 -8.82 16 8 C 0.09 1.08 4.04 -3.71 -0.01 1.07 16 9 C -0.15 -2.40 5.54 -26.60 -0.15 -2.54 16 10 C 0.19 3.38 2.19 -67.88 -0.15 3.23 16 11 H 0.05 0.88 8.08 -51.93 -0.42 0.46 16 12 N -0.72 -16.80 4.41 -53.37 -0.24 -17.04 16 13 C -0.24 -6.26 9.93 -15.06 -0.15 -6.41 16 14 H 0.07 1.75 7.83 -52.48 -0.41 1.34 16 15 C -0.01 -0.30 5.50 -17.43 -0.10 -0.40 16 16 N -0.93 -27.21 13.06 55.49 0.72 -26.48 16 17 Si 0.90 21.65 29.55 -169.99 -5.02 16.62 16 18 H -0.29 -6.97 7.11 56.52 0.40 -6.57 16 19 H -0.29 -7.10 7.11 56.52 0.40 -6.70 16 20 H -0.28 -6.55 7.11 56.52 0.40 -6.15 16 21 C -0.11 -1.77 2.46 -90.50 -0.22 -1.99 16 22 H 0.07 1.20 8.14 -51.93 -0.42 0.78 16 23 C -0.14 -2.20 9.02 37.16 0.34 -1.86 16 24 C 0.12 1.78 5.73 -3.70 -0.02 1.76 16 25 C -0.12 -1.38 4.45 -26.59 -0.12 -1.50 16 26 C 0.05 0.56 6.55 37.21 0.24 0.81 16 27 O -0.38 -5.09 10.77 -35.23 -0.38 -5.47 16 28 C 0.06 0.75 6.62 37.20 0.25 1.00 16 29 C -0.16 -1.62 4.61 -26.59 -0.12 -1.75 16 30 H 0.09 0.62 8.14 -51.93 -0.42 0.19 16 31 H 0.04 0.32 8.14 -51.93 -0.42 -0.10 16 32 H 0.04 0.27 8.14 -51.93 -0.42 -0.16 16 33 H 0.07 0.66 4.56 -51.93 -0.24 0.42 16 34 H 0.06 0.47 8.14 -51.93 -0.42 0.05 16 35 H 0.09 0.96 2.47 -51.93 -0.13 0.83 16 36 H 0.06 0.77 8.08 -51.93 -0.42 0.35 16 37 H 0.06 1.00 8.14 -51.93 -0.42 0.58 16 38 H 0.08 1.27 8.14 -51.93 -0.42 0.84 16 39 H 0.38 9.74 7.50 -40.82 -0.31 9.43 16 40 H 0.26 7.28 8.31 -40.82 -0.34 6.94 16 41 H 0.04 0.62 8.14 -51.93 -0.42 0.20 16 42 H 0.07 1.40 7.36 -51.93 -0.38 1.02 16 43 H 0.05 0.79 8.14 -51.93 -0.42 0.37 16 44 H 0.06 0.89 8.14 -51.93 -0.42 0.47 16 45 H 0.09 1.36 7.00 -51.93 -0.36 0.99 16 46 H 0.08 1.05 7.89 -51.93 -0.41 0.64 16 47 H 0.07 0.71 8.14 -51.93 -0.42 0.29 16 48 H 0.09 0.94 8.14 -51.93 -0.42 0.52 16 49 H 0.08 1.22 5.58 -51.93 -0.29 0.93 16 50 H 0.10 1.03 8.14 -51.93 -0.42 0.61 16 51 H 0.05 0.73 7.38 -51.93 -0.38 0.35 16 52 H 0.09 0.74 8.14 -51.93 -0.42 0.32 16 53 H 0.10 0.96 4.94 -51.93 -0.26 0.71 16 LS Contribution 393.07 15.07 5.92 5.92 Total: -1.00 -31.08 393.07 -7.88 -38.96 By element: Atomic # 1 Polarization: 19.00 SS G_CDS: -9.06 Total: 9.94 kcal Atomic # 6 Polarization: -0.73 SS G_CDS: 0.96 Total: 0.23 kcal Atomic # 7 Polarization: -52.31 SS G_CDS: -0.02 Total: -52.34 kcal Atomic # 8 Polarization: -18.69 SS G_CDS: -0.65 Total: -19.34 kcal Atomic # 14 Polarization: 21.65 SS G_CDS: -5.02 Total: 16.62 kcal Total LS contribution 5.92 Total: 5.92 kcal Total: -31.08 -7.88 -38.96 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. ZINC001319689144.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 -60.313 kcal (2) G-P(sol) polarization free energy of solvation -31.077 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -91.390 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -7.880 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -38.957 kcal (6) G-S(sol) free energy of system = (1) + (5) -99.270 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 1.20 seconds