Wall clock time and date at job start Sat Apr 11 2020 06:10:09 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 1.53006 * 1 3 3 H 1.08996 * 109.46931 * 2 1 4 4 C 1.50697 * 109.46989 * 240.00757 * 2 1 3 5 5 H 1.07999 * 119.99855 * 239.99802 * 4 2 1 6 6 C 1.37876 * 120.00358 * 59.99698 * 4 2 1 7 7 N 1.31516 * 120.00097 * 0.02562 * 6 4 2 8 8 Si 1.86800 * 120.00325 * 179.97438 * 6 4 2 9 9 H 1.48500 * 109.47278 * 179.97438 * 8 6 4 10 10 H 1.48495 * 109.47167 * 300.00125 * 8 6 4 11 11 H 1.48504 * 109.47217 * 60.00096 * 8 6 4 12 12 N 1.46500 * 109.47309 * 120.00650 * 2 1 3 13 13 C 1.46501 * 120.00055 * 66.35116 * 12 2 1 14 14 C 1.34772 * 119.99507 * 246.34971 * 12 2 1 15 15 O 1.21284 * 119.99571 * 184.33908 * 14 12 2 16 16 C 1.50696 * 120.00324 * 4.33605 * 14 12 2 17 17 C 1.53041 * 109.46058 * 281.38737 * 16 14 12 18 18 C 1.53196 * 109.30990 * 178.61471 * 17 16 14 19 19 N 1.46922 * 108.77701 * 54.64126 * 18 17 16 20 20 C 1.34774 * 120.63658 * 126.41574 * 19 18 17 21 21 O 1.21513 * 120.00466 * 179.97438 * 20 19 18 22 22 O 1.34642 * 119.99477 * 359.96773 * 20 19 18 23 23 C 1.45205 * 116.99527 * 180.02562 * 22 20 19 24 24 C 1.53005 * 109.47006 * 60.00474 * 23 22 20 25 25 C 1.53007 * 109.46724 * 180.02562 * 23 22 20 26 26 C 1.52991 * 109.47299 * 300.00391 * 23 22 20 27 27 C 1.46932 * 118.73655 * 306.38444 * 19 18 17 28 28 C 1.53047 * 109.46109 * 161.32165 * 16 14 12 29 29 H 1.09006 * 109.46738 * 179.97438 * 1 2 3 30 30 H 1.08993 * 109.46832 * 299.99432 * 1 2 3 31 31 H 1.08994 * 109.47287 * 59.99672 * 1 2 3 32 32 H 0.96997 * 120.00112 * 180.02562 * 7 6 4 33 33 H 1.08993 * 109.47405 * 92.69753 * 13 12 2 34 34 H 1.08998 * 109.46436 * 212.70086 * 13 12 2 35 35 H 1.08999 * 109.46702 * 332.69565 * 13 12 2 36 36 H 1.09001 * 109.46166 * 41.35274 * 16 14 12 37 37 H 1.08999 * 109.49756 * 298.56620 * 17 16 14 38 38 H 1.08997 * 109.49929 * 58.66612 * 17 16 14 39 39 H 1.09002 * 109.59002 * 294.84857 * 18 17 16 40 40 H 1.09007 * 109.69961 * 174.49485 * 18 17 16 41 41 H 1.09002 * 109.46668 * 59.99639 * 24 23 22 42 42 H 1.08997 * 109.46760 * 179.97438 * 24 23 22 43 43 H 1.08994 * 109.46927 * 299.99777 * 24 23 22 44 44 H 1.08995 * 109.46997 * 59.99951 * 25 23 22 45 45 H 1.08998 * 109.46822 * 180.02562 * 25 23 22 46 46 H 1.09002 * 109.47131 * 300.00001 * 25 23 22 47 47 H 1.09003 * 109.47340 * 60.00048 * 26 23 22 48 48 H 1.09006 * 109.47448 * 180.02562 * 26 23 22 49 49 H 1.09006 * 109.47359 * 300.00268 * 26 23 22 50 50 H 1.08996 * 109.58843 * 293.82613 * 27 19 18 51 51 H 1.08997 * 109.70452 * 173.47042 * 27 19 18 52 52 H 1.09003 * 109.49132 * 301.33896 * 28 16 14 53 53 H 1.08999 * 109.49541 * 61.39922 * 28 16 14 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 1.5301 0.0000 0.0000 3 1 1.8933 1.0276 0.0000 4 6 2.0323 -0.7102 -1.2305 5 1 2.6533 -1.5883 -1.1316 6 6 1.6992 -0.2391 -2.4828 7 7 0.9435 0.8305 -2.6034 8 14 2.3225 -1.1191 -4.0081 9 1 1.8268 -0.4194 -5.2205 10 1 3.8074 -1.1185 -4.0079 11 1 1.8280 -2.5194 -4.0085 12 7 2.0184 -0.6907 1.1961 13 6 1.7828 -2.1274 1.3598 14 6 2.6845 -0.0045 2.1457 15 8 3.1571 -0.5892 3.0973 16 6 2.8420 1.4894 2.0251 17 6 3.9574 1.8054 1.0260 18 6 4.0913 3.3245 0.8800 19 7 4.2901 3.9119 2.2120 20 6 5.3385 4.7231 2.4553 21 8 5.4916 5.2031 3.5611 22 8 6.2163 5.0016 1.4731 23 6 7.3215 5.8822 1.8070 24 6 8.1486 5.2581 2.9328 25 6 8.2055 6.0811 0.5741 26 6 6.7748 7.2355 2.2657 27 6 3.3238 3.5987 3.2736 28 6 3.1985 2.0766 3.3927 29 1 -0.3633 -1.0277 -0.0005 30 1 -0.3633 0.5137 0.8900 31 1 -0.3633 0.5138 -0.8899 32 1 0.7089 1.1617 -3.4843 33 1 2.6339 -2.6824 0.9656 34 1 1.6581 -2.3567 2.4181 35 1 0.8810 -2.4117 0.8177 36 1 1.9067 1.9261 1.6751 37 1 4.8982 1.3904 1.3877 38 1 3.7140 1.3670 0.0582 39 1 3.1834 3.7302 0.4335 40 1 4.9465 3.5588 0.2460 41 1 8.5381 4.2940 2.6059 42 1 8.9785 5.9190 3.1831 43 1 7.5187 5.1167 3.8110 44 1 7.6160 6.5258 -0.2276 45 1 9.0354 6.7418 0.8248 46 1 8.5950 5.1171 0.2469 47 1 6.1448 7.0941 3.1440 48 1 7.6045 7.8967 2.5160 49 1 6.1855 7.6801 1.4637 50 1 2.3534 4.0266 3.0223 51 1 3.6712 4.0120 4.2204 52 1 2.4148 1.8310 4.1094 53 1 4.1461 1.6585 3.7323 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 ZINC000491171428.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 06:10:09 Heat of formation + Delta-G solvation = -123.306281 kcal Electronic energy + Delta-G solvation = -32083.880887 eV Core-core repulsion = 27955.571667 eV Total energy + Delta-G solvation = -4128.309220 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.220 amu Computer time = 0.68 seconds Orbital eigenvalues (eV) -40.88645 -39.68865 -37.99951 -36.31813 -35.61333 -34.19598 -32.69175 -32.59196 -30.96385 -29.22108 -27.53451 -27.48794 -27.22919 -25.37624 -25.12507 -23.26534 -22.36807 -21.41214 -20.42246 -19.21743 -18.40798 -17.67868 -16.68783 -16.57726 -16.34428 -16.13276 -15.32516 -15.06086 -14.66413 -14.56847 -14.52587 -14.34565 -13.81325 -13.63857 -13.32673 -13.25194 -13.05762 -12.75860 -12.63278 -12.33440 -12.27311 -12.00486 -11.95588 -11.88436 -11.77538 -11.59774 -11.49232 -11.35633 -11.34809 -11.16467 -11.04322 -10.93514 -10.78138 -10.49629 -10.41933 -10.37506 -10.26323 -10.22606 -9.93533 -9.37277 -9.01637 -8.64168 -8.55075 -7.66399 -6.23631 -4.31872 2.18620 2.89520 3.19823 3.25413 3.26870 3.34459 3.83371 3.94035 4.27883 4.60300 4.64796 4.78591 4.88109 5.03104 5.07896 5.09451 5.22050 5.32824 5.35991 5.40226 5.44670 5.55008 5.55904 5.63588 5.66556 5.73636 5.83798 5.85052 5.87998 5.91304 5.99932 6.14613 6.16967 6.19778 6.23204 6.25313 6.34904 6.43231 6.49158 6.51613 6.58754 6.65548 6.69994 6.90333 7.14170 7.36037 7.44136 7.61666 7.79675 8.05791 8.39308 8.43173 8.70347 8.98056 9.36912 10.80985 Molecular weight = 340.22amu Principal moments of inertia in cm(-1) A = 0.012112 B = 0.003329 C = 0.002858 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 2311.212966 B = 8407.752995 C = 9794.699198 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.153 4.153 2 C 0.250 3.750 3 H 0.059 0.941 4 C -0.530 4.530 5 H 0.061 0.939 6 C 0.069 3.931 7 N -0.887 5.887 8 Si 0.897 3.103 9 H -0.286 1.286 10 H -0.276 1.276 11 H -0.277 1.277 12 N -0.591 5.591 13 C 0.100 3.900 14 C 0.513 3.487 15 O -0.575 6.575 16 C -0.102 4.102 17 C -0.128 4.128 18 C 0.115 3.885 19 N -0.592 5.592 20 C 0.654 3.346 21 O -0.577 6.577 22 O -0.361 6.361 23 C 0.135 3.865 24 C -0.183 4.183 25 C -0.141 4.141 26 C -0.182 4.182 27 C 0.128 3.872 28 C -0.114 4.114 29 H 0.032 0.968 30 H 0.012 0.988 31 H 0.095 0.905 32 H 0.265 0.735 33 H 0.044 0.956 34 H 0.054 0.946 35 H 0.069 0.931 36 H 0.096 0.904 37 H 0.067 0.933 38 H 0.105 0.895 39 H 0.077 0.923 40 H 0.093 0.907 41 H 0.059 0.941 42 H 0.067 0.933 43 H 0.088 0.912 44 H 0.067 0.933 45 H 0.078 0.922 46 H 0.067 0.933 47 H 0.088 0.912 48 H 0.067 0.933 49 H 0.059 0.941 50 H 0.072 0.928 51 H 0.096 0.904 52 H 0.079 0.921 53 H 0.076 0.924 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges 7.523 10.049 6.035 13.928 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 -0.212 4.212 2 C 0.150 3.850 3 H 0.077 0.923 4 C -0.568 4.568 5 H 0.079 0.921 6 C -0.134 4.134 7 N -0.525 5.525 8 Si 0.724 3.276 9 H -0.211 1.211 10 H -0.201 1.201 11 H -0.202 1.202 12 N -0.321 5.321 13 C -0.044 4.044 14 C 0.300 3.700 15 O -0.456 6.456 16 C -0.123 4.123 17 C -0.166 4.166 18 C -0.007 4.007 19 N -0.332 5.332 20 C 0.409 3.591 21 O -0.467 6.467 22 O -0.275 6.275 23 C 0.098 3.902 24 C -0.240 4.240 25 C -0.198 4.198 26 C -0.239 4.239 27 C 0.007 3.993 28 C -0.152 4.152 29 H 0.051 0.949 30 H 0.031 0.969 31 H 0.113 0.887 32 H 0.075 0.925 33 H 0.063 0.937 34 H 0.073 0.927 35 H 0.088 0.912 36 H 0.114 0.886 37 H 0.085 0.915 38 H 0.124 0.876 39 H 0.095 0.905 40 H 0.111 0.889 41 H 0.078 0.922 42 H 0.086 0.914 43 H 0.106 0.894 44 H 0.086 0.914 45 H 0.097 0.903 46 H 0.086 0.914 47 H 0.106 0.894 48 H 0.086 0.914 49 H 0.078 0.922 50 H 0.091 0.909 51 H 0.114 0.886 52 H 0.098 0.902 53 H 0.094 0.906 Dipole moment (debyes) X Y Z Total from point charges 7.772 10.045 6.655 14.338 hybrid contribution 0.194 -0.578 -1.114 1.270 sum 7.966 9.466 5.541 13.557 Atomic orbital electron populations 1.22158 0.98301 0.99915 1.00806 1.19156 0.91326 0.93683 0.80847 0.92300 1.21272 1.32126 1.13422 0.90025 0.92056 1.24852 0.94698 0.94910 0.98913 1.69836 1.36002 1.22508 1.24130 0.86573 0.79312 0.79789 0.81902 1.21142 1.20140 1.20209 1.48282 1.53801 1.08914 1.21114 1.21320 1.00958 0.81791 1.00306 1.20423 0.78135 0.89336 0.82084 1.90591 1.50081 1.71225 1.33708 1.21228 1.00881 0.93339 0.96868 1.21978 0.98196 0.95244 1.01176 1.21788 1.03247 0.93216 0.82456 1.47071 1.24695 1.47827 1.13604 1.17952 0.79812 0.78905 0.82392 1.90854 1.76293 1.56083 1.23467 1.86322 1.36584 1.64340 1.40300 1.22032 0.83699 0.88492 0.95945 1.22511 1.00538 1.01050 0.99917 1.21857 0.98632 1.02951 0.96376 1.22508 1.02498 0.95407 1.03536 1.21679 0.91089 0.95684 0.90819 1.21765 1.03522 0.93558 0.96379 0.94889 0.96917 0.88691 0.92477 0.93735 0.92746 0.91208 0.88584 0.91460 0.87636 0.90460 0.88875 0.92164 0.91377 0.89358 0.91428 0.90336 0.91405 0.89374 0.91377 0.92220 0.90945 0.88576 0.90246 0.90573 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 12. 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 -3.28 9.05 37.16 0.34 -2.94 16 2 C 0.25 5.46 1.88 -69.08 -0.13 5.33 16 3 H 0.06 1.30 4.41 -51.93 -0.23 1.07 16 4 C -0.53 -12.84 8.30 -34.44 -0.29 -13.13 16 5 H 0.06 1.53 7.37 -52.49 -0.39 1.14 16 6 C 0.07 1.69 5.30 -17.82 -0.09 1.60 16 7 N -0.89 -22.16 11.32 55.43 0.63 -21.53 16 8 Si 0.90 19.53 29.54 -169.99 -5.02 14.51 16 9 H -0.29 -6.22 7.11 56.52 0.40 -5.81 16 10 H -0.28 -6.03 7.11 56.52 0.40 -5.63 16 11 H -0.28 -6.06 7.11 56.52 0.40 -5.65 16 12 N -0.59 -12.15 2.75 -175.27 -0.48 -12.63 16 13 C 0.10 1.90 9.32 59.85 0.56 2.46 16 14 C 0.51 10.22 6.85 -10.99 -0.08 10.15 16 15 O -0.57 -12.75 15.72 5.55 0.09 -12.67 16 16 C -0.10 -1.68 1.62 -91.73 -0.15 -1.83 16 17 C -0.13 -2.04 4.99 -26.61 -0.13 -2.18 16 18 C 0.12 1.61 6.45 -3.71 -0.02 1.58 16 19 N -0.59 -8.39 2.97 -178.55 -0.53 -8.92 16 20 C 0.65 9.80 7.74 54.05 0.42 10.22 16 21 O -0.58 -9.31 11.30 -19.28 -0.22 -9.53 16 22 O -0.36 -4.97 8.53 -40.33 -0.34 -5.31 16 23 C 0.14 1.51 1.13 -90.62 -0.10 1.41 16 24 C -0.18 -2.00 8.37 37.16 0.31 -1.69 16 25 C -0.14 -1.22 8.85 37.16 0.33 -0.89 16 26 C -0.18 -1.92 8.37 37.15 0.31 -1.61 16 27 C 0.13 1.68 6.43 -3.71 -0.02 1.66 16 28 C -0.11 -1.66 4.79 -26.61 -0.13 -1.79 16 29 H 0.03 0.69 6.95 -51.93 -0.36 0.33 16 30 H 0.01 0.23 8.14 -51.93 -0.42 -0.19 16 31 H 0.09 2.22 6.07 -51.93 -0.32 1.90 16 32 H 0.27 6.43 8.31 -40.82 -0.34 6.09 16 33 H 0.04 0.85 8.08 -51.93 -0.42 0.43 16 34 H 0.05 0.99 7.57 -51.93 -0.39 0.60 16 35 H 0.07 1.28 6.79 -51.93 -0.35 0.93 16 36 H 0.10 1.56 7.06 -51.93 -0.37 1.19 16 37 H 0.07 1.12 8.14 -51.93 -0.42 0.70 16 38 H 0.11 1.92 6.40 -51.93 -0.33 1.59 16 39 H 0.08 1.04 8.14 -51.93 -0.42 0.62 16 40 H 0.09 1.26 6.93 -51.92 -0.36 0.90 16 41 H 0.06 0.66 8.14 -51.93 -0.42 0.23 16 42 H 0.07 0.59 8.14 -51.93 -0.42 0.17 16 43 H 0.09 1.17 5.88 -51.93 -0.31 0.86 16 44 H 0.07 0.57 8.14 -51.93 -0.42 0.15 16 45 H 0.08 0.52 8.14 -51.93 -0.42 0.09 16 46 H 0.07 0.59 8.14 -51.93 -0.42 0.17 16 47 H 0.09 1.12 5.88 -51.93 -0.31 0.82 16 48 H 0.07 0.57 8.14 -51.93 -0.42 0.15 16 49 H 0.06 0.61 8.14 -51.93 -0.42 0.18 16 50 H 0.07 0.84 8.14 -51.93 -0.42 0.42 16 51 H 0.10 1.26 7.01 -51.93 -0.36 0.90 16 52 H 0.08 1.11 8.14 -51.93 -0.42 0.68 16 53 H 0.08 1.24 7.96 -51.93 -0.41 0.83 16 LS Contribution 403.24 15.07 6.08 6.08 Total: -1.00 -28.03 403.24 -7.80 -35.83 By element: Atomic # 1 Polarization: 14.94 SS G_CDS: -9.11 Total: 5.83 kcal Atomic # 6 Polarization: 7.24 SS G_CDS: 1.12 Total: 8.36 kcal Atomic # 7 Polarization: -42.70 SS G_CDS: -0.39 Total: -43.09 kcal Atomic # 8 Polarization: -27.04 SS G_CDS: -0.47 Total: -27.51 kcal Atomic # 14 Polarization: 19.53 SS G_CDS: -5.02 Total: 14.51 kcal Total LS contribution 6.08 Total: 6.08 kcal Total: -28.03 -7.80 -35.83 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. ZINC000491171428.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 -87.479 kcal (2) G-P(sol) polarization free energy of solvation -28.031 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -115.510 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -7.797 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -35.827 kcal (6) G-S(sol) free energy of system = (1) + (5) -123.306 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.68 seconds