Wall clock time and date at job start Sat Apr 11 2020 06:13:13 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 1.45206 * 1 3 3 C 1.34219 * 117.00101 * 2 1 4 4 O 1.20828 * 120.00189 * 359.97438 * 3 2 1 5 5 C 1.50698 * 120.00268 * 180.02562 * 3 2 1 6 6 C 1.53000 * 109.47649 * 179.97438 * 5 3 2 7 7 C 1.53001 * 109.47377 * 179.97438 * 6 5 3 8 8 H 1.08994 * 109.50680 * 305.08533 * 7 6 5 9 9 C 1.53124 * 109.53319 * 65.17749 * 7 6 5 10 10 C 1.53115 * 109.16210 * 177.61061 * 9 7 6 11 11 C 1.53036 * 109.28044 * 302.34948 * 10 9 7 12 12 N 1.46846 * 109.52210 * 59.17574 * 11 10 9 13 13 C 1.46906 * 110.99674 * 174.16040 * 12 11 10 14 14 H 1.08998 * 109.47432 * 316.55374 * 13 12 11 15 15 C 1.53004 * 109.46960 * 76.55747 * 13 12 11 16 16 C 1.50699 * 109.46918 * 196.55471 * 13 12 11 17 17 O 1.21284 * 120.00078 * 343.78057 * 16 13 12 18 18 N 1.34777 * 119.99888 * 164.05870 * 16 13 12 19 19 C 1.46501 * 119.99930 * 359.71928 * 18 16 13 20 20 C 1.46502 * 119.99991 * 179.72752 * 18 16 13 21 21 C 1.50700 * 109.47461 * 89.99506 * 20 18 16 22 22 H 1.07993 * 119.99761 * 0.02562 * 21 20 18 23 23 C 1.37878 * 119.99906 * 180.02562 * 21 20 18 24 24 N 1.31516 * 120.00041 * 0.02562 * 23 21 20 25 25 Si 1.86804 * 119.99843 * 180.02562 * 23 21 20 26 26 H 1.48493 * 109.46927 * 359.97438 * 25 23 21 27 27 H 1.48500 * 109.46870 * 120.00024 * 25 23 21 28 28 H 1.48494 * 109.46930 * 239.99836 * 25 23 21 29 29 C 1.46841 * 111.19973 * 298.25655 * 12 11 10 30 30 H 1.09003 * 109.46926 * 300.00267 * 1 2 3 31 31 H 1.09000 * 109.46844 * 60.00225 * 1 2 3 32 32 H 1.08999 * 109.47408 * 180.02562 * 1 2 3 33 33 H 1.09001 * 109.47238 * 59.99065 * 5 3 2 34 34 H 1.09004 * 109.47036 * 300.00078 * 5 3 2 35 35 H 1.09000 * 109.46871 * 59.99986 * 6 5 3 36 36 H 1.09001 * 109.46854 * 299.99850 * 6 5 3 37 37 H 1.08995 * 109.52374 * 297.52359 * 9 7 6 38 38 H 1.09007 * 109.51746 * 57.64446 * 9 7 6 39 39 H 1.09004 * 109.49713 * 62.28693 * 10 9 7 40 40 H 1.08995 * 109.50567 * 182.40593 * 10 9 7 41 41 H 1.09001 * 109.46113 * 299.16363 * 11 10 9 42 42 H 1.09006 * 109.46011 * 179.19053 * 11 10 9 43 43 H 1.09003 * 109.46712 * 179.97438 * 15 13 12 44 44 H 1.08998 * 109.46421 * 299.99531 * 15 13 12 45 45 H 1.08998 * 109.47353 * 59.99578 * 15 13 12 46 46 H 1.08997 * 109.46843 * 90.00560 * 19 18 16 47 47 H 1.09000 * 109.46712 * 210.00236 * 19 18 16 48 48 H 1.08991 * 109.47049 * 330.00652 * 19 18 16 49 49 H 1.09000 * 109.46891 * 209.99897 * 20 18 16 50 50 H 1.09004 * 109.47108 * 329.99511 * 20 18 16 51 51 H 0.97005 * 120.00017 * 179.97438 * 24 23 21 52 52 H 1.09006 * 109.46273 * 181.75765 * 29 12 11 53 53 H 1.08996 * 109.46558 * 301.72509 * 29 12 11 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 1.4521 0.0000 0.0000 3 6 2.0614 1.1959 0.0000 4 8 1.4034 2.2093 -0.0005 5 6 3.5663 1.2748 -0.0006 6 6 4.0002 2.7420 -0.0011 7 6 5.5281 2.8220 -0.0011 8 1 5.9224 2.2517 0.8399 9 6 6.0712 2.2433 -1.3106 10 6 7.5960 2.3820 -1.3273 11 6 7.9711 3.8566 -1.1636 12 7 7.4294 4.3630 0.1039 13 6 7.8861 5.7354 0.3607 14 1 8.9477 5.8149 0.1265 15 6 7.0960 6.7084 -0.5168 16 6 7.6652 6.0751 1.8122 17 8 6.9236 5.3939 2.4883 18 7 8.2872 7.1391 2.3575 19 6 9.1830 7.9618 1.5408 20 6 8.0678 7.4728 3.7670 21 6 9.0873 6.7592 4.6169 22 1 9.8252 6.1212 4.1534 23 6 9.0780 6.9207 5.9862 24 7 8.1790 7.6972 6.5506 25 14 10.3423 6.0367 7.0396 26 1 11.2348 5.2300 6.1691 27 1 11.1487 7.0348 7.7870 28 1 9.6478 5.1422 8.0001 29 6 5.9632 4.2839 0.1241 30 1 -0.3633 0.5139 0.8900 31 1 -0.3633 0.5138 -0.8900 32 1 -0.3634 -1.0276 0.0005 33 1 3.9557 0.7807 -0.8907 34 1 3.9564 0.7805 0.8892 35 1 3.6108 3.2363 0.8889 36 1 3.6102 3.2359 -0.8911 37 1 5.8003 1.1901 -1.3834 38 1 5.6457 2.7880 -2.1536 39 1 8.0228 1.8047 -0.5070 40 1 7.9848 2.0107 -2.2754 41 1 7.5555 4.4311 -1.9915 42 1 9.0565 3.9571 -1.1606 43 1 7.4346 7.7268 -0.3259 44 1 7.2559 6.4627 -1.5666 45 1 6.0344 6.6290 -0.2826 46 1 8.6133 8.7648 1.0732 47 1 9.9612 8.3891 2.1732 48 1 9.6408 7.3437 0.7686 49 1 8.1687 8.5492 3.9055 50 1 7.0660 7.1608 4.0626 51 1 8.1722 7.8106 7.5139 52 1 5.5902 4.6947 1.0623 53 1 5.5571 4.8564 -0.7098 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 ZINC000880038542.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 06:13:13 Heat of formation + Delta-G solvation = -124.839013 kcal Electronic energy + Delta-G solvation = -30926.759832 eV Core-core repulsion = 26798.384148 eV Total energy + Delta-G solvation = -4128.375684 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.220 amu Computer time = 1.04 seconds Orbital eigenvalues (eV) -40.70747 -40.00836 -38.30948 -36.82953 -35.32300 -34.70965 -33.08277 -32.45663 -30.35751 -29.62988 -27.88933 -27.62872 -25.95168 -25.10112 -24.75214 -23.37220 -22.07689 -21.45283 -20.41125 -19.50420 -18.22730 -17.80131 -16.86466 -16.83830 -16.52315 -16.25421 -15.84326 -15.12494 -15.01699 -14.73422 -14.52599 -14.31010 -14.07666 -13.92920 -13.71369 -13.51558 -13.20271 -12.93429 -12.68668 -12.59512 -12.46294 -12.21596 -12.12922 -11.98434 -11.90942 -11.83918 -11.52131 -11.31844 -11.17286 -11.14444 -11.04745 -10.89408 -10.77017 -10.67668 -10.60748 -10.55843 -10.32558 -10.18812 -10.08245 -9.54489 -8.74124 -8.39823 -7.98839 -7.55802 -6.00211 -4.04351 2.00758 2.48618 3.32686 3.39819 3.42848 3.49451 3.76957 4.22433 4.47573 4.49195 4.65919 4.73886 4.80639 4.82141 4.88087 4.91922 5.00521 5.05159 5.18656 5.21717 5.23975 5.29240 5.34125 5.35879 5.45610 5.51710 5.55259 5.58404 5.64548 5.75333 5.78223 5.80660 5.84030 5.89363 5.97699 6.01858 6.09564 6.11491 6.15871 6.19064 6.27221 6.43352 6.47794 7.03613 7.24544 7.31325 7.49830 7.53313 7.61303 7.97052 8.28523 8.49591 8.96552 9.20271 9.60800 11.07875 Molecular weight = 340.22amu Principal moments of inertia in cm(-1) A = 0.010747 B = 0.002637 C = 0.002340 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 2604.872424 B =10615.764048 C =11960.850184 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C 0.035 3.965 2 O -0.363 6.363 3 C 0.459 3.541 4 O -0.506 6.506 5 C -0.113 4.113 6 C -0.103 4.103 7 C -0.082 4.082 8 H 0.085 0.915 9 C -0.118 4.118 10 C -0.115 4.115 11 C 0.054 3.946 12 N -0.514 5.514 13 C 0.064 3.936 14 H 0.098 0.902 15 C -0.180 4.180 16 C 0.514 3.486 17 O -0.525 6.525 18 N -0.604 5.604 19 C 0.083 3.917 20 C 0.247 3.753 21 C -0.522 4.522 22 H 0.058 0.942 23 C 0.060 3.940 24 N -0.896 5.896 25 Si 0.897 3.103 26 H -0.273 1.273 27 H -0.284 1.284 28 H -0.283 1.283 29 C 0.056 3.944 30 H 0.063 0.937 31 H 0.061 0.939 32 H 0.100 0.900 33 H 0.106 0.894 34 H 0.108 0.892 35 H 0.077 0.923 36 H 0.069 0.931 37 H 0.062 0.938 38 H 0.057 0.943 39 H 0.072 0.928 40 H 0.063 0.937 41 H 0.031 0.969 42 H 0.071 0.929 43 H 0.069 0.931 44 H 0.060 0.940 45 H 0.065 0.935 46 H 0.043 0.957 47 H 0.073 0.927 48 H 0.056 0.944 49 H 0.031 0.969 50 H 0.043 0.957 51 H 0.262 0.738 52 H 0.101 0.899 53 H 0.029 0.971 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -6.822 -11.213 -20.521 24.359 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 -0.059 4.059 2 O -0.280 6.280 3 C 0.302 3.698 4 O -0.393 6.393 5 C -0.150 4.150 6 C -0.141 4.141 7 C -0.101 4.101 8 H 0.103 0.897 9 C -0.156 4.156 10 C -0.153 4.153 11 C -0.074 4.074 12 N -0.237 5.237 13 C -0.048 4.048 14 H 0.116 0.884 15 C -0.239 4.239 16 C 0.300 3.700 17 O -0.401 6.401 18 N -0.336 5.336 19 C -0.061 4.061 20 C 0.127 3.873 21 C -0.561 4.561 22 H 0.076 0.924 23 C -0.142 4.142 24 N -0.535 5.535 25 Si 0.725 3.275 26 H -0.198 1.198 27 H -0.210 1.210 28 H -0.209 1.209 29 C -0.071 4.071 30 H 0.082 0.918 31 H 0.080 0.920 32 H 0.118 0.882 33 H 0.124 0.876 34 H 0.127 0.873 35 H 0.096 0.904 36 H 0.088 0.912 37 H 0.081 0.919 38 H 0.076 0.924 39 H 0.091 0.909 40 H 0.082 0.918 41 H 0.049 0.951 42 H 0.090 0.910 43 H 0.087 0.913 44 H 0.079 0.921 45 H 0.084 0.916 46 H 0.061 0.939 47 H 0.092 0.908 48 H 0.074 0.926 49 H 0.048 0.952 50 H 0.061 0.939 51 H 0.072 0.928 52 H 0.120 0.880 53 H 0.047 0.953 Dipole moment (debyes) X Y Z Total from point charges -7.327 -11.496 -19.582 23.860 hybrid contribution 0.300 0.211 -0.006 0.367 sum -7.027 -11.285 -19.587 23.673 Atomic orbital electron populations 1.23251 0.76492 1.03578 1.02582 1.86514 1.23395 1.33849 1.84273 1.24020 0.92517 0.81177 0.72115 1.90686 1.67334 1.36331 1.44977 1.21505 0.86708 1.00784 1.06011 1.21437 0.95464 0.93231 1.03933 1.21171 0.93345 0.97166 0.98420 0.89706 1.21725 0.95764 1.00601 0.97496 1.21553 0.95935 0.96087 1.01704 1.22120 0.99648 0.95526 0.90071 1.61705 1.10058 1.19548 1.32436 1.21678 1.00444 0.88330 0.94385 0.88438 1.22372 1.01712 1.00356 0.99430 1.20041 0.81153 0.80793 0.88060 1.90607 1.37431 1.49258 1.62804 1.48129 1.44525 1.27632 1.13362 1.21673 0.94283 0.94735 0.95421 1.19263 0.98256 0.95815 0.73920 1.21477 1.14865 1.28139 0.91592 0.92412 1.24941 0.96051 0.95383 0.97834 1.69947 1.34664 1.38148 1.10789 0.86449 0.81241 0.79479 0.80302 1.19789 1.21048 1.20901 1.22304 0.86868 0.95438 1.02473 0.91844 0.91987 0.88186 0.87607 0.87336 0.90450 0.91246 0.91886 0.92384 0.90894 0.91795 0.95123 0.91012 0.91254 0.92146 0.91573 0.93853 0.90834 0.92570 0.95151 0.93899 0.92841 0.88043 0.95291 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 0.25 10.56 101.05 1.07 1.32 16 2 O -0.36 -3.59 10.56 -39.23 -0.41 -4.00 16 3 C 0.46 5.08 7.96 36.00 0.29 5.37 16 4 O -0.51 -7.17 15.73 -18.75 -0.29 -7.47 16 5 C -0.11 -1.00 5.57 -27.88 -0.16 -1.15 16 6 C -0.10 -1.11 3.98 -26.73 -0.11 -1.22 16 7 C -0.08 -0.95 2.35 -90.54 -0.21 -1.16 16 8 H 0.08 1.10 8.14 -51.93 -0.42 0.68 16 9 C -0.12 -1.09 4.98 -26.61 -0.13 -1.22 16 10 C -0.11 -1.11 6.09 -26.65 -0.16 -1.27 16 11 C 0.05 0.61 5.22 -3.83 -0.02 0.59 16 12 N -0.51 -7.55 4.36 -228.08 -0.99 -8.54 16 13 C 0.06 0.97 1.93 -68.86 -0.13 0.84 16 14 H 0.10 1.35 6.23 -51.93 -0.32 1.03 16 15 C -0.18 -2.25 8.20 37.16 0.30 -1.95 16 16 C 0.51 10.72 6.84 -10.99 -0.08 10.64 16 17 O -0.52 -13.12 13.86 5.55 0.08 -13.04 16 18 N -0.60 -12.86 2.86 -182.96 -0.52 -13.39 16 19 C 0.08 1.31 9.35 59.85 0.56 1.87 16 20 C 0.25 6.52 5.16 -5.19 -0.03 6.49 16 21 C -0.52 -14.99 9.39 -34.44 -0.32 -15.31 16 22 H 0.06 1.67 7.81 -52.49 -0.41 1.26 16 23 C 0.06 1.73 5.46 -17.82 -0.10 1.63 16 24 N -0.90 -26.97 13.29 55.43 0.74 -26.23 16 25 Si 0.90 22.19 29.54 -169.99 -5.02 17.17 16 26 H -0.27 -6.67 7.11 56.52 0.40 -6.27 16 27 H -0.28 -6.83 7.11 56.52 0.40 -6.43 16 28 H -0.28 -7.00 7.11 56.52 0.40 -6.60 16 29 C 0.06 0.80 3.45 -3.84 -0.01 0.79 16 30 H 0.06 0.48 8.13 -51.93 -0.42 0.06 16 31 H 0.06 0.44 8.13 -51.93 -0.42 0.02 16 32 H 0.10 0.45 8.14 -51.93 -0.42 0.02 16 33 H 0.11 0.72 6.63 -51.93 -0.34 0.37 16 34 H 0.11 0.86 8.14 -51.93 -0.42 0.44 16 35 H 0.08 0.99 8.10 -51.93 -0.42 0.57 16 36 H 0.07 0.76 8.10 -51.93 -0.42 0.34 16 37 H 0.06 0.48 6.70 -51.93 -0.35 0.13 16 38 H 0.06 0.52 8.14 -51.93 -0.42 0.09 16 39 H 0.07 0.78 8.14 -51.93 -0.42 0.36 16 40 H 0.06 0.50 8.14 -51.93 -0.42 0.08 16 41 H 0.03 0.32 7.13 -51.93 -0.37 -0.05 16 42 H 0.07 0.76 7.95 -51.93 -0.41 0.35 16 43 H 0.07 0.82 6.45 -51.93 -0.33 0.49 16 44 H 0.06 0.63 7.09 -51.93 -0.37 0.26 16 45 H 0.07 0.90 6.45 -51.93 -0.33 0.57 16 46 H 0.04 0.59 7.43 -51.93 -0.39 0.20 16 47 H 0.07 1.20 8.07 -51.93 -0.42 0.78 16 48 H 0.06 0.73 6.03 -51.93 -0.31 0.42 16 49 H 0.03 0.81 8.07 -51.93 -0.42 0.39 16 50 H 0.04 1.28 7.42 -51.93 -0.39 0.89 16 51 H 0.26 7.42 8.31 -40.82 -0.34 7.08 16 52 H 0.10 1.82 5.87 -51.93 -0.30 1.52 16 53 H 0.03 0.38 6.59 -51.93 -0.34 0.04 16 LS Contribution 409.55 15.07 6.17 6.17 Total: -1.00 -35.31 409.55 -8.68 -43.99 By element: Atomic # 1 Polarization: 8.27 SS G_CDS: -9.17 Total: -0.91 kcal Atomic # 6 Polarization: 5.49 SS G_CDS: 0.76 Total: 6.25 kcal Atomic # 7 Polarization: -47.38 SS G_CDS: -0.78 Total: -48.16 kcal Atomic # 8 Polarization: -23.88 SS G_CDS: -0.63 Total: -24.51 kcal Atomic # 14 Polarization: 22.19 SS G_CDS: -5.02 Total: 17.17 kcal Total LS contribution 6.17 Total: 6.17 kcal Total: -35.31 -8.68 -43.99 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. ZINC000880038542.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 -80.850 kcal (2) G-P(sol) polarization free energy of solvation -35.312 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -116.163 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -8.676 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -43.989 kcal (6) G-S(sol) free energy of system = (1) + (5) -124.839 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 1.04 seconds