Wall clock time and date at job start Tue Mar 31 2020 12:17:09 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 1.53005 * 1 3 3 C 1.52996 * 109.47185 * 2 1 4 4 C 1.53004 * 109.47062 * 179.56743 * 3 2 1 5 5 C 1.52994 * 109.47099 * 182.43616 * 4 3 2 6 6 N 1.46896 * 109.47552 * 299.57145 * 3 2 1 7 7 C 1.46895 * 111.00200 * 154.62206 * 6 3 2 8 8 C 1.53004 * 109.47329 * 287.73423 * 7 6 3 9 9 C 1.46903 * 111.00021 * 278.57915 * 6 3 2 10 10 C 1.50697 * 109.47301 * 163.92322 * 9 6 3 11 11 C 1.38287 * 119.97327 * 269.97705 * 10 9 6 12 12 C 1.38239 * 120.11336 * 180.02562 * 11 10 9 13 13 C 1.38164 * 120.05854 * 359.68015 * 12 11 10 14 14 C 1.38715 * 119.93896 * 0.61937 * 13 12 11 15 15 O 1.35902 * 120.05500 * 179.68076 * 14 13 12 16 16 C 1.42898 * 117.00083 * 359.71952 * 15 14 13 17 17 C 1.52999 * 109.47078 * 180.02562 * 16 15 14 18 18 C 1.50697 * 109.47187 * 180.02562 * 17 16 15 19 19 H 1.08006 * 119.99659 * 359.97438 * 18 17 16 20 20 C 1.37879 * 120.00338 * 179.97438 * 18 17 16 21 21 N 1.31516 * 119.99597 * 0.02562 * 20 18 17 22 22 Si 1.86800 * 120.00236 * 179.97438 * 20 18 17 23 23 H 1.48498 * 109.46749 * 60.00097 * 22 20 18 24 24 H 1.48494 * 109.46979 * 180.02562 * 22 20 18 25 25 H 1.48503 * 109.46849 * 300.00424 * 22 20 18 26 26 C 1.38119 * 119.97359 * 89.99910 * 10 9 6 27 27 H 1.08997 * 109.47139 * 185.06264 * 1 2 3 28 28 H 1.08998 * 109.47271 * 305.06660 * 1 2 3 29 29 H 1.09000 * 109.46476 * 65.05874 * 1 2 3 30 30 H 1.09001 * 109.47024 * 239.99873 * 2 1 3 31 31 H 1.09001 * 109.46509 * 120.00124 * 2 1 3 32 32 H 1.09005 * 109.47392 * 59.57217 * 3 2 1 33 33 H 1.09004 * 109.47394 * 302.43932 * 4 3 2 34 34 H 1.09001 * 109.46462 * 62.44153 * 4 3 2 35 35 H 1.09001 * 109.47177 * 166.27029 * 5 4 3 36 36 H 1.09004 * 109.47518 * 286.26991 * 5 4 3 37 37 H 1.09003 * 109.47652 * 46.26724 * 5 4 3 38 38 H 1.08994 * 109.47543 * 47.73698 * 7 6 3 39 39 H 1.09006 * 109.47401 * 167.74048 * 7 6 3 40 40 H 1.08998 * 109.47568 * 186.43428 * 8 7 6 41 41 H 1.09002 * 109.47000 * 306.44604 * 8 7 6 42 42 H 1.09001 * 109.46460 * 66.43680 * 8 7 6 43 43 H 1.09003 * 109.46888 * 43.92108 * 9 6 3 44 44 H 1.08999 * 109.46881 * 283.92115 * 9 6 3 45 45 H 1.08006 * 119.94162 * 359.97438 * 11 10 9 46 46 H 1.08006 * 119.97094 * 179.97438 * 12 11 10 47 47 H 1.07997 * 120.03337 * 180.29255 * 13 12 11 48 48 H 1.08999 * 109.47053 * 300.00178 * 16 15 14 49 49 H 1.08999 * 109.46831 * 60.00142 * 16 15 14 50 50 H 1.08999 * 109.47018 * 299.99824 * 17 16 15 51 51 H 1.08995 * 109.47121 * 59.99837 * 17 16 15 52 52 H 0.97000 * 119.99389 * 179.97438 * 21 20 18 53 53 H 1.08003 * 120.02795 * 0.02562 * 26 10 9 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 2.0401 1.4425 0.0000 4 6 3.5700 1.4424 0.0109 5 6 4.0796 2.8837 0.0722 6 7 1.5589 2.1320 -1.2045 7 6 1.4861 3.5829 -0.9869 8 6 0.3123 3.9012 -0.0585 9 6 2.4025 1.8154 -2.3648 10 6 1.6803 2.1991 -3.6306 11 6 0.8641 1.2811 -4.2657 12 6 0.2007 1.6298 -5.4273 13 6 0.3465 2.8991 -5.9531 14 6 1.1696 3.8198 -5.3214 15 8 1.3199 5.0669 -5.8401 16 6 0.6050 5.3599 -7.0422 17 6 0.8971 6.7992 -7.4713 18 6 0.1427 7.1085 -8.7386 19 1 -0.4822 6.3538 -9.1930 20 6 0.2503 8.3549 -9.3183 21 7 1.0116 9.2737 -8.7653 22 14 -0.6842 8.7380 -10.8897 23 1 -2.1411 8.5780 -10.6506 24 1 -0.4008 10.1350 -11.3060 25 1 -0.2531 7.8053 -11.9618 26 6 1.8346 3.4672 -4.1557 27 1 -0.3633 -1.0236 0.0907 28 1 -0.3634 0.5904 0.8411 29 1 -0.3632 0.4334 -0.9319 30 1 1.8934 -0.5139 -0.8900 31 1 1.8933 -0.5139 0.8900 32 1 1.6705 1.9586 0.8861 33 1 3.9272 0.8934 0.8822 34 1 3.9397 0.9647 -0.8964 35 1 5.1402 2.8837 0.3239 36 1 3.9362 3.3614 -0.8970 37 1 3.5255 3.4330 0.8334 38 1 2.4138 3.9290 -0.5313 39 1 1.3405 4.0869 -1.9424 40 1 0.1874 4.9817 0.0121 41 1 -0.5984 3.4554 -0.4584 42 1 0.5118 3.4930 0.9323 43 1 2.6159 0.7465 -2.3779 44 1 3.3373 2.3717 -2.2969 45 1 0.7453 0.2897 -3.8539 46 1 -0.4360 0.9109 -5.9216 47 1 -0.1757 3.1726 -6.8580 48 1 0.9214 4.6753 -7.8292 49 1 -0.4643 5.2426 -6.8668 50 1 0.5810 7.4841 -6.6844 51 1 1.9664 6.9161 -7.6467 52 1 1.0875 10.1505 -9.1733 53 1 2.4728 4.1836 -3.6598 RHF calculation, no. of doubly occupied orbitals= 62 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 ZINC000563776568.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 12:17:09 Heat of formation + Delta-G solvation = -28.272227 kcal Electronic energy + Delta-G solvation = -27365.994604 eV Core-core repulsion = 23816.370524 eV Total energy + Delta-G solvation = -3549.624080 eV No. of doubly occupied orbitals = 62 Molecular weight (most abundant/longest-lived isotopes) = 319.225 amu Computer time = 0.74 seconds Orbital eigenvalues (eV) -40.21240 -39.24134 -37.07299 -33.86448 -33.37572 -32.31535 -31.97941 -30.82537 -29.67969 -28.99511 -26.80259 -25.42464 -24.80097 -22.51950 -22.34283 -21.96113 -21.60956 -20.37323 -19.54166 -17.68359 -16.47983 -16.17168 -15.75139 -15.61563 -15.45555 -15.25637 -15.21232 -14.57260 -14.46259 -13.94029 -13.76571 -13.50182 -13.21670 -12.99966 -12.81578 -12.69462 -12.59813 -12.33579 -12.27593 -11.91153 -11.79101 -11.66657 -11.46352 -11.35260 -11.30013 -11.22673 -11.05858 -11.01511 -10.86339 -10.75485 -10.64091 -10.57811 -10.36257 -9.83399 -9.65289 -9.31000 -8.68487 -8.44550 -8.22326 -7.78412 -6.10229 -4.14882 1.49758 1.75169 3.28749 3.33044 3.34862 3.66868 3.87203 4.15618 4.40882 4.41591 4.66625 4.77366 4.83802 4.95633 5.01957 5.10524 5.15380 5.17439 5.22108 5.26097 5.28768 5.35223 5.39025 5.47969 5.50177 5.54573 5.57074 5.67284 5.69067 5.70817 5.78577 5.84752 5.85300 5.85809 5.99333 6.00192 6.04962 6.07873 6.09778 6.18438 6.23697 6.28168 6.59044 6.60012 6.76202 6.77160 6.96579 7.02134 7.09137 7.51176 7.64382 7.82169 8.08472 8.24284 8.90482 9.49343 11.01344 Molecular weight = 319.23amu Principal moments of inertia in cm(-1) A = 0.021215 B = 0.002366 C = 0.002265 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1319.495674 B =11832.951769 C =12360.838865 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.141 4.141 2 C -0.111 4.111 3 C 0.080 3.920 4 C -0.157 4.157 5 C -0.161 4.161 6 N -0.518 5.518 7 C 0.021 3.979 8 C -0.144 4.144 9 C 0.093 3.907 10 C -0.041 4.041 11 C -0.151 4.151 12 C -0.081 4.081 13 C -0.213 4.213 14 C 0.145 3.855 15 O -0.317 6.317 16 C 0.066 3.934 17 C 0.026 3.974 18 C -0.527 4.527 19 H 0.057 0.943 20 C 0.061 3.939 21 N -0.890 5.890 22 Si 0.899 3.101 23 H -0.275 1.275 24 H -0.286 1.286 25 H -0.275 1.275 26 C -0.157 4.157 27 H 0.042 0.958 28 H 0.046 0.954 29 H 0.069 0.931 30 H 0.060 0.940 31 H 0.058 0.942 32 H 0.081 0.919 33 H 0.064 0.936 34 H 0.069 0.931 35 H 0.053 0.947 36 H 0.063 0.937 37 H 0.057 0.943 38 H 0.054 0.946 39 H 0.082 0.918 40 H 0.056 0.944 41 H 0.062 0.938 42 H 0.047 0.953 43 H 0.081 0.919 44 H 0.049 0.951 45 H 0.116 0.884 46 H 0.119 0.881 47 H 0.128 0.872 48 H 0.050 0.950 49 H 0.050 0.950 50 H 0.027 0.973 51 H 0.027 0.973 52 H 0.264 0.736 53 H 0.122 0.878 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges 2.678 -18.841 19.381 27.162 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 -0.198 4.198 2 C -0.149 4.149 3 C -0.028 4.028 4 C -0.196 4.196 5 C -0.218 4.218 6 N -0.241 5.241 7 C -0.106 4.106 8 C -0.201 4.201 9 C -0.034 4.034 10 C -0.041 4.041 11 C -0.169 4.169 12 C -0.099 4.099 13 C -0.232 4.232 14 C 0.098 3.902 15 O -0.230 6.230 16 C -0.008 4.008 17 C -0.011 4.011 18 C -0.565 4.565 19 H 0.076 0.924 20 C -0.142 4.142 21 N -0.528 5.528 22 Si 0.726 3.274 23 H -0.201 1.201 24 H -0.211 1.211 25 H -0.201 1.201 26 C -0.177 4.177 27 H 0.061 0.939 28 H 0.066 0.934 29 H 0.088 0.912 30 H 0.078 0.922 31 H 0.077 0.923 32 H 0.099 0.901 33 H 0.083 0.917 34 H 0.087 0.913 35 H 0.072 0.928 36 H 0.081 0.919 37 H 0.076 0.924 38 H 0.071 0.929 39 H 0.100 0.900 40 H 0.075 0.925 41 H 0.081 0.919 42 H 0.066 0.934 43 H 0.099 0.901 44 H 0.067 0.933 45 H 0.134 0.866 46 H 0.137 0.863 47 H 0.146 0.854 48 H 0.068 0.932 49 H 0.068 0.932 50 H 0.046 0.954 51 H 0.045 0.955 52 H 0.073 0.927 53 H 0.140 0.860 Dipole moment (debyes) X Y Z Total from point charges 2.378 -18.631 19.331 26.953 hybrid contribution 0.142 0.505 -0.921 1.060 sum 2.520 -18.126 18.410 25.958 Atomic orbital electron populations 1.21620 0.95150 1.00307 1.02768 1.21508 0.96901 0.95202 1.01240 1.21894 0.92051 0.95426 0.93447 1.22281 0.97132 0.97530 1.02667 1.22108 1.00870 0.96671 1.02139 1.62175 1.50702 1.08541 1.02708 1.22633 0.98634 0.88107 1.01236 1.21748 0.98959 1.00796 0.98628 1.21102 0.93627 1.00947 0.87716 1.19396 0.96872 0.92809 0.95058 1.20714 0.99882 0.99605 0.96735 1.20874 0.98126 0.95431 0.95473 1.21362 1.03737 0.94965 1.03090 1.19147 0.93366 0.85106 0.92576 1.86162 1.67437 1.26947 1.42502 1.23308 0.94320 1.01209 0.81962 1.19111 0.98324 0.87266 0.96419 1.20937 1.28641 0.98303 1.08627 0.92431 1.24989 0.95369 0.96113 0.97702 1.69968 1.38257 1.04719 1.39853 0.86546 0.80251 0.77427 0.83148 1.20075 1.21111 1.20089 1.20253 1.04290 0.96801 0.96329 0.93861 0.93437 0.91244 0.92163 0.92319 0.90061 0.91687 0.91251 0.92817 0.91852 0.92359 0.92856 0.89967 0.92507 0.91915 0.93387 0.90060 0.93319 0.86591 0.86346 0.85423 0.93205 0.93182 0.95440 0.95452 0.92652 0.85957 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 -0.14 -1.12 9.69 37.16 0.36 -0.76 16 2 C -0.11 -0.81 5.50 -26.73 -0.15 -0.96 16 3 C 0.08 0.62 1.81 -67.72 -0.12 0.50 16 4 C -0.16 -1.12 4.89 -26.73 -0.13 -1.25 16 5 C -0.16 -1.21 8.07 37.15 0.30 -0.91 16 6 N -0.52 -4.87 3.60 -228.08 -0.82 -5.69 16 7 C 0.02 0.21 5.09 -3.82 -0.02 0.19 16 8 C -0.14 -1.36 9.89 37.16 0.37 -0.99 16 9 C 0.09 0.93 3.56 -4.98 -0.02 0.91 16 10 C -0.04 -0.52 5.09 -104.65 -0.53 -1.05 16 11 C -0.15 -1.87 9.70 -39.56 -0.38 -2.26 16 12 C -0.08 -1.08 10.04 -39.61 -0.40 -1.48 16 13 C -0.21 -3.39 9.04 -39.43 -0.36 -3.75 16 14 C 0.14 2.55 6.69 -39.21 -0.26 2.29 16 15 O -0.32 -6.61 10.14 -19.43 -0.20 -6.81 16 16 C 0.07 1.44 4.68 37.16 0.17 1.61 16 17 C 0.03 0.69 5.34 -27.89 -0.15 0.54 16 18 C -0.53 -14.77 9.11 -34.44 -0.31 -15.09 16 19 H 0.06 1.54 7.74 -52.48 -0.41 1.13 16 20 C 0.06 1.72 5.46 -17.82 -0.10 1.62 16 21 N -0.89 -26.58 13.29 55.43 0.74 -25.84 16 22 Si 0.90 21.35 29.54 -169.99 -5.02 16.32 16 23 H -0.28 -6.40 7.11 56.52 0.40 -6.00 16 24 H -0.29 -6.70 7.11 56.52 0.40 -6.30 16 25 H -0.28 -6.40 7.11 56.52 0.40 -6.00 16 26 C -0.16 -2.38 8.05 -39.43 -0.32 -2.70 16 27 H 0.04 0.31 8.14 -51.93 -0.42 -0.11 16 28 H 0.05 0.37 8.14 -51.93 -0.42 -0.05 16 29 H 0.07 0.67 7.78 -51.93 -0.40 0.26 16 30 H 0.06 0.46 7.10 -51.93 -0.37 0.09 16 31 H 0.06 0.38 8.14 -51.93 -0.42 -0.05 16 32 H 0.08 0.65 6.29 -51.93 -0.33 0.32 16 33 H 0.06 0.42 8.14 -51.93 -0.42 -0.01 16 34 H 0.07 0.51 6.19 -51.93 -0.32 0.19 16 35 H 0.05 0.38 8.14 -51.93 -0.42 -0.05 16 36 H 0.06 0.54 4.82 -51.93 -0.25 0.29 16 37 H 0.06 0.43 7.32 -51.93 -0.38 0.05 16 38 H 0.05 0.50 3.88 -51.93 -0.20 0.29 16 39 H 0.08 1.00 5.36 -51.93 -0.28 0.72 16 40 H 0.06 0.52 8.14 -51.93 -0.42 0.10 16 41 H 0.06 0.65 8.14 -51.93 -0.42 0.23 16 42 H 0.05 0.40 6.76 -51.93 -0.35 0.05 16 43 H 0.08 0.73 6.24 -51.93 -0.32 0.41 16 44 H 0.05 0.48 5.47 -51.93 -0.28 0.20 16 45 H 0.12 1.21 8.06 -52.48 -0.42 0.79 16 46 H 0.12 1.30 8.06 -52.48 -0.42 0.88 16 47 H 0.13 2.02 6.30 -52.49 -0.33 1.69 16 48 H 0.05 1.03 7.67 -51.93 -0.40 0.63 16 49 H 0.05 1.04 7.65 -51.93 -0.40 0.64 16 50 H 0.03 0.77 8.14 -51.93 -0.42 0.35 16 51 H 0.03 0.76 8.14 -51.93 -0.42 0.34 16 52 H 0.26 7.40 8.31 -40.82 -0.34 7.07 16 53 H 0.12 1.77 7.55 -52.48 -0.40 1.38 16 LS Contribution 401.36 15.07 6.05 6.05 Total: -1.00 -29.44 401.36 -10.50 -39.95 By element: Atomic # 1 Polarization: 8.75 SS G_CDS: -9.20 Total: -0.46 kcal Atomic # 6 Polarization: -21.47 SS G_CDS: -2.05 Total: -23.52 kcal Atomic # 7 Polarization: -31.45 SS G_CDS: -0.08 Total: -31.53 kcal Atomic # 8 Polarization: -6.61 SS G_CDS: -0.20 Total: -6.81 kcal Atomic # 14 Polarization: 21.35 SS G_CDS: -5.02 Total: 16.32 kcal Total LS contribution 6.05 Total: 6.05 kcal Total: -29.44 -10.50 -39.95 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. ZINC000563776568.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 11.674 kcal (2) G-P(sol) polarization free energy of solvation -29.442 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -17.768 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -10.504 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -39.946 kcal (6) G-S(sol) free energy of system = (1) + (5) -28.272 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.74 seconds