Wall clock time and date at job start Sat Apr 11 2020 06:09:57 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 1.53001 * 1 3 3 N 1.46500 * 109.47197 * 2 1 4 4 C 1.37099 * 119.99824 * 279.73572 * 3 2 1 5 5 H 1.08001 * 119.99815 * 181.94679 * 4 3 2 6 6 C 1.38942 * 120.00158 * 1.95391 * 4 3 2 7 7 N 1.31408 * 120.00250 * 4.46171 * 6 4 3 8 8 Si 1.86801 * 120.00096 * 184.46955 * 6 4 3 9 9 H 1.48493 * 109.47247 * 89.99606 * 8 6 4 10 10 H 1.48506 * 109.46899 * 209.99528 * 8 6 4 11 11 H 1.48500 * 109.47068 * 329.99463 * 8 6 4 12 12 C 1.34780 * 120.00164 * 99.72958 * 3 2 1 13 13 O 1.21291 * 120.00066 * 179.12904 * 12 3 2 14 14 C 1.50697 * 119.99986 * 359.13189 * 12 3 2 15 15 C 1.53006 * 110.88550 * 302.91494 * 14 12 3 16 16 C 1.53007 * 109.47112 * 306.22117 * 15 14 12 17 17 C 1.55157 * 111.00904 * 66.83557 * 14 12 3 18 18 C 1.54323 * 102.94015 * 82.57277 * 17 14 12 19 19 N 1.47020 * 107.27194 * 22.19729 * 18 17 14 20 20 C 1.34779 * 125.65177 * 181.02666 * 19 18 17 21 21 O 1.21508 * 120.00490 * 180.02562 * 20 19 18 22 22 O 1.34638 * 119.99337 * 0.03574 * 20 19 18 23 23 C 1.45199 * 116.99609 * 180.02562 * 22 20 19 24 24 C 1.53004 * 109.47270 * 60.00032 * 23 22 20 25 25 C 1.53001 * 109.47555 * 180.02562 * 23 22 20 26 26 C 1.53002 * 109.47229 * 300.00195 * 23 22 20 27 27 C 1.47426 * 108.70431 * 1.05732 * 19 18 17 28 28 H 1.09001 * 109.46734 * 56.97187 * 1 2 3 29 29 H 1.08999 * 109.46633 * 176.96781 * 1 2 3 30 30 H 1.08990 * 109.47217 * 296.96866 * 1 2 3 31 31 H 1.09001 * 109.47156 * 119.99501 * 2 1 3 32 32 H 1.08996 * 109.47375 * 239.99869 * 2 1 3 33 33 H 0.96995 * 120.00744 * 180.02562 * 7 6 4 34 34 H 1.08999 * 109.47221 * 66.22350 * 15 14 12 35 35 H 1.09005 * 109.47061 * 186.22164 * 15 14 12 36 36 H 1.09001 * 109.46914 * 304.77452 * 16 15 14 37 37 H 1.08998 * 109.46898 * 64.77020 * 16 15 14 38 38 H 1.08997 * 109.47153 * 184.77304 * 16 15 14 39 39 H 1.08992 * 110.72330 * 200.93804 * 17 14 12 40 40 H 1.09003 * 110.71821 * 324.21042 * 17 14 12 41 41 H 1.08999 * 109.88487 * 262.77854 * 18 17 14 42 42 H 1.08991 * 110.01020 * 141.68634 * 18 17 14 43 43 H 1.08996 * 109.47069 * 59.99974 * 24 23 22 44 44 H 1.09003 * 109.47214 * 179.97438 * 24 23 22 45 45 H 1.09001 * 109.47011 * 299.99911 * 24 23 22 46 46 H 1.08999 * 109.47141 * 59.99301 * 25 23 22 47 47 H 1.08994 * 109.47405 * 179.97438 * 25 23 22 48 48 H 1.09005 * 109.46860 * 300.00188 * 25 23 22 49 49 H 1.09001 * 109.47330 * 59.99920 * 26 23 22 50 50 H 1.09003 * 109.47196 * 180.02562 * 26 23 22 51 51 H 1.08995 * 109.47144 * 299.99674 * 26 23 22 52 52 H 1.09000 * 110.36879 * 217.03455 * 27 19 18 53 53 H 1.08997 * 110.36594 * 94.71178 * 27 19 18 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 7 2.0184 1.3812 0.0000 4 6 2.0576 2.0944 -1.1702 5 1 2.4469 3.1018 -1.1759 6 6 1.5963 1.5213 -2.3489 7 7 1.0421 0.3300 -2.3273 8 14 1.7641 2.4441 -3.9643 9 1 3.0627 2.1014 -4.5976 10 1 0.6537 2.0588 -4.8721 11 1 1.7090 3.9057 -3.7075 12 6 2.4290 1.9508 1.1504 13 8 2.8481 3.0890 1.1478 14 6 2.3674 1.1736 2.4400 15 6 0.9423 0.6914 2.7188 16 6 -0.0172 1.8823 2.6726 17 6 3.3639 -0.0156 2.4209 18 6 4.7003 0.6470 2.8167 19 7 4.3762 1.8894 3.5329 20 6 5.2713 2.7677 4.0269 21 8 4.8882 3.7658 4.6043 22 8 6.5900 2.5390 3.8804 23 6 7.4962 3.5271 4.4380 24 6 7.2634 3.6392 5.9460 25 6 8.9415 3.0996 4.1750 26 6 7.2386 4.8842 3.7800 27 6 2.9100 2.0151 3.6220 28 1 -0.3633 0.5601 -0.8616 29 1 -0.3632 -1.0262 -0.0544 30 1 -0.3633 0.4660 0.9158 31 1 1.8934 -0.5138 0.8900 32 1 1.8934 -0.5138 -0.8899 33 1 0.7204 -0.0704 -3.1501 34 1 0.6516 -0.0389 1.9637 35 1 0.9014 0.2299 3.7055 36 1 0.3225 2.6498 3.3681 37 1 -0.0399 2.2916 1.6626 38 1 -1.0177 1.5540 2.9541 39 1 3.0767 -0.7712 3.1519 40 1 3.4288 -0.4483 1.4225 41 1 5.2802 0.8752 1.9224 42 1 5.2682 -0.0183 3.4668 43 1 7.4469 2.6724 6.4148 44 1 7.9440 4.3806 6.3647 45 1 6.2337 3.9441 6.1330 46 1 9.1071 3.0200 3.1006 47 1 9.6217 3.8415 4.5931 48 1 9.1253 2.1326 4.6434 49 1 6.2089 5.1891 3.9670 50 1 7.9192 5.6258 4.1982 51 1 7.4045 4.8044 2.7057 52 1 2.6114 3.0578 3.5140 53 1 2.5518 1.6133 4.5698 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 ZINC000128905748.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 06:09:57 Heat of formation + Delta-G solvation = -76.855822 kcal Electronic energy + Delta-G solvation = -33133.179644 eV Core-core repulsion = 29006.884666 eV Total energy + Delta-G solvation = -4126.294977 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.220 amu Computer time = 0.79 seconds Orbital eigenvalues (eV) -40.74162 -39.87647 -37.48939 -36.13811 -35.21163 -34.20685 -33.51927 -31.43029 -30.42440 -29.41500 -27.98856 -27.41319 -27.31458 -25.54178 -24.25941 -22.48892 -22.02734 -21.39376 -21.10378 -19.18967 -18.41186 -17.61298 -16.80778 -16.49375 -16.17935 -15.57390 -15.26307 -14.95079 -14.69761 -14.25941 -14.20505 -13.82581 -13.61842 -13.56051 -13.15878 -12.89486 -12.81527 -12.51127 -12.40161 -12.28480 -12.27019 -12.00749 -11.86527 -11.79407 -11.66846 -11.52236 -11.30693 -11.18836 -11.17567 -11.11060 -10.95275 -10.74924 -10.59456 -10.32534 -10.26265 -10.22326 -10.04839 -9.93889 -9.81618 -9.71811 -8.81815 -8.37518 -8.27908 -7.74321 -6.16092 -3.80154 2.35791 3.14856 3.18890 3.24438 3.30085 3.85405 4.08977 4.12284 4.66418 4.75117 4.78600 4.82630 4.87658 4.93625 5.12783 5.18559 5.41104 5.43304 5.51458 5.54208 5.58760 5.63766 5.65974 5.73684 5.77032 5.82090 5.90163 5.91964 5.96897 6.02137 6.03163 6.17198 6.24806 6.27731 6.31995 6.32130 6.35834 6.43702 6.51625 6.60147 6.65320 6.70111 6.77512 6.82101 6.87708 7.42939 7.62336 7.80865 7.82774 8.09998 8.55232 8.65741 9.20500 9.47900 10.01248 10.68204 Molecular weight = 340.22amu Principal moments of inertia in cm(-1) A = 0.014104 B = 0.003695 C = 0.003249 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1984.773356 B = 7576.172127 C = 8615.174626 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.154 4.154 2 C 0.106 3.894 3 N -0.440 5.440 4 C -0.288 4.288 5 H 0.101 0.899 6 C 0.022 3.978 7 N -0.881 5.881 8 Si 0.928 3.072 9 H -0.279 1.279 10 H -0.284 1.284 11 H -0.272 1.272 12 C 0.461 3.539 13 O -0.585 6.585 14 C -0.081 4.081 15 C -0.128 4.128 16 C -0.153 4.153 17 C -0.128 4.128 18 C 0.109 3.891 19 N -0.590 5.590 20 C 0.672 3.328 21 O -0.571 6.571 22 O -0.363 6.363 23 C 0.136 3.864 24 C -0.181 4.181 25 C -0.139 4.139 26 C -0.184 4.184 27 C 0.153 3.847 28 H 0.087 0.913 29 H 0.033 0.967 30 H 0.037 0.963 31 H 0.040 0.960 32 H 0.117 0.883 33 H 0.262 0.738 34 H 0.105 0.895 35 H 0.061 0.939 36 H 0.051 0.949 37 H 0.067 0.933 38 H 0.051 0.949 39 H 0.081 0.919 40 H 0.097 0.903 41 H 0.069 0.931 42 H 0.067 0.933 43 H 0.057 0.943 44 H 0.067 0.933 45 H 0.088 0.912 46 H 0.066 0.934 47 H 0.077 0.923 48 H 0.064 0.936 49 H 0.089 0.911 50 H 0.066 0.934 51 H 0.060 0.940 52 H 0.091 0.909 53 H 0.067 0.933 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges 6.759 -3.602 11.659 13.950 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 -0.017 4.017 3 N -0.158 5.158 4 C -0.416 4.416 5 H 0.119 0.881 6 C -0.178 4.178 7 N -0.523 5.523 8 Si 0.755 3.245 9 H -0.206 1.206 10 H -0.210 1.210 11 H -0.197 1.197 12 C 0.248 3.752 13 O -0.470 6.470 14 C -0.085 4.085 15 C -0.166 4.166 16 C -0.210 4.210 17 C -0.165 4.165 18 C -0.014 4.014 19 N -0.330 5.330 20 C 0.427 3.573 21 O -0.461 6.461 22 O -0.278 6.278 23 C 0.099 3.901 24 C -0.239 4.239 25 C -0.196 4.196 26 C -0.241 4.241 27 C 0.031 3.969 28 H 0.106 0.894 29 H 0.052 0.948 30 H 0.055 0.945 31 H 0.058 0.942 32 H 0.134 0.866 33 H 0.074 0.926 34 H 0.122 0.878 35 H 0.079 0.921 36 H 0.070 0.930 37 H 0.086 0.914 38 H 0.070 0.930 39 H 0.100 0.900 40 H 0.115 0.885 41 H 0.087 0.913 42 H 0.085 0.915 43 H 0.076 0.924 44 H 0.086 0.914 45 H 0.107 0.893 46 H 0.085 0.915 47 H 0.096 0.904 48 H 0.083 0.917 49 H 0.108 0.892 50 H 0.085 0.915 51 H 0.079 0.921 52 H 0.110 0.890 53 H 0.085 0.915 Dipole moment (debyes) X Y Z Total from point charges 6.904 -2.766 11.692 13.857 hybrid contribution 0.026 0.266 -0.897 0.936 sum 6.930 -2.500 10.794 13.068 Atomic orbital electron populations 1.22474 0.96958 1.00044 1.01712 1.22139 0.94769 0.83546 1.01228 1.43733 1.54197 1.11947 1.05940 1.19801 1.38239 0.99369 0.84224 0.88097 1.25195 0.96615 0.96560 0.99456 1.70147 1.39845 1.15208 1.27146 0.85884 0.77732 0.79668 0.81202 1.20560 1.20993 1.19671 1.19303 0.84640 0.87330 0.83953 1.90547 1.51651 1.19000 1.85773 1.21874 0.96004 0.95427 0.95192 1.22127 0.92027 0.99665 1.02739 1.21810 0.98188 0.97948 1.03080 1.22969 0.93196 0.96910 1.03470 1.21992 0.97805 0.85068 0.96542 1.46925 1.05839 1.22363 1.57863 1.17367 0.80218 0.81482 0.78239 1.90856 1.79953 1.27875 1.47454 1.86297 1.15393 1.50917 1.75197 1.21999 0.87681 0.87202 0.93265 1.22506 1.05083 1.02157 0.94118 1.21838 0.92397 1.02258 1.03131 1.22512 1.05116 0.95544 1.00917 1.22055 0.76265 1.02440 0.96117 0.89421 0.94801 0.94463 0.94250 0.86564 0.92638 0.87754 0.92074 0.93004 0.91413 0.93008 0.90041 0.88481 0.91263 0.91488 0.92428 0.91425 0.89326 0.91457 0.90380 0.91670 0.89186 0.91509 0.92069 0.89019 0.91502 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 15. 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 -3.04 8.41 37.16 0.31 -2.73 16 2 C 0.11 2.19 4.30 -4.04 -0.02 2.17 16 3 N -0.44 -10.47 2.65 -114.81 -0.30 -10.78 16 4 C -0.29 -7.67 9.50 -14.94 -0.14 -7.81 16 5 H 0.10 2.90 7.16 -52.49 -0.38 2.53 16 6 C 0.02 0.54 5.21 -17.47 -0.09 0.45 16 7 N -0.88 -21.29 7.29 55.49 0.40 -20.89 16 8 Si 0.93 20.35 29.55 -169.99 -5.02 15.32 16 9 H -0.28 -6.13 7.11 56.52 0.40 -5.73 16 10 H -0.28 -6.13 7.11 56.52 0.40 -5.73 16 11 H -0.27 -6.11 7.11 56.52 0.40 -5.71 16 12 C 0.46 10.61 4.98 -10.99 -0.05 10.55 16 13 O -0.59 -15.98 15.32 5.55 0.08 -15.90 16 14 C -0.08 -1.42 0.26 -153.51 -0.04 -1.46 16 15 C -0.13 -1.95 4.31 -26.72 -0.12 -2.06 16 16 C -0.15 -2.47 8.18 37.16 0.30 -2.17 16 17 C -0.13 -1.88 4.98 -24.90 -0.12 -2.01 16 18 C 0.11 1.70 6.74 -3.07 -0.02 1.68 16 19 N -0.59 -10.65 3.31 -176.31 -0.58 -11.23 16 20 C 0.67 12.66 7.93 54.06 0.43 13.08 16 21 O -0.57 -11.66 12.14 -19.28 -0.23 -11.89 16 22 O -0.36 -6.04 9.49 -40.32 -0.38 -6.43 16 23 C 0.14 1.83 1.13 -90.62 -0.10 1.73 16 24 C -0.18 -2.23 8.37 37.16 0.31 -1.92 16 25 C -0.14 -1.41 8.85 37.16 0.33 -1.08 16 26 C -0.18 -2.58 8.37 37.16 0.31 -2.27 16 27 C 0.15 2.71 4.79 -2.53 -0.01 2.69 16 28 H 0.09 2.03 6.06 -51.93 -0.31 1.71 16 29 H 0.03 0.60 8.14 -51.93 -0.42 0.17 16 30 H 0.04 0.67 3.77 -51.93 -0.20 0.48 16 31 H 0.04 0.69 3.21 -51.93 -0.17 0.53 16 32 H 0.12 2.67 5.79 -51.93 -0.30 2.37 16 33 H 0.26 6.13 8.31 -40.82 -0.34 5.79 16 34 H 0.10 1.62 3.07 -51.93 -0.16 1.46 16 35 H 0.06 0.76 8.02 -51.93 -0.42 0.34 16 36 H 0.05 0.82 7.41 -51.93 -0.39 0.44 16 37 H 0.07 1.33 6.73 -51.93 -0.35 0.98 16 38 H 0.05 0.71 8.14 -51.93 -0.42 0.29 16 39 H 0.08 0.95 8.04 -51.93 -0.42 0.53 16 40 H 0.10 1.51 5.92 -51.93 -0.31 1.20 16 41 H 0.07 1.19 8.14 -51.93 -0.42 0.77 16 42 H 0.07 0.87 8.14 -51.93 -0.42 0.45 16 43 H 0.06 0.65 8.14 -51.93 -0.42 0.23 16 44 H 0.07 0.67 8.14 -51.93 -0.42 0.24 16 45 H 0.09 1.32 5.88 -51.93 -0.31 1.01 16 46 H 0.07 0.70 8.14 -51.93 -0.42 0.27 16 47 H 0.08 0.61 8.14 -51.93 -0.42 0.19 16 48 H 0.06 0.61 8.14 -51.93 -0.42 0.19 16 49 H 0.09 1.54 5.88 -51.93 -0.31 1.23 16 50 H 0.07 0.74 8.14 -51.93 -0.42 0.32 16 51 H 0.06 0.88 8.14 -51.93 -0.42 0.46 16 52 H 0.09 1.91 7.20 -51.93 -0.37 1.54 16 53 H 0.07 1.01 7.95 -51.93 -0.41 0.59 16 LS Contribution 387.35 15.07 5.84 5.84 Total: -1.00 -30.44 387.35 -7.50 -37.94 By element: Atomic # 1 Polarization: 17.73 SS G_CDS: -8.57 Total: 9.16 kcal Atomic # 6 Polarization: 7.58 SS G_CDS: 1.28 Total: 8.85 kcal Atomic # 7 Polarization: -42.42 SS G_CDS: -0.48 Total: -42.90 kcal Atomic # 8 Polarization: -33.68 SS G_CDS: -0.53 Total: -34.21 kcal Atomic # 14 Polarization: 20.35 SS G_CDS: -5.02 Total: 15.32 kcal Total LS contribution 5.84 Total: 5.84 kcal Total: -30.44 -7.50 -37.94 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. ZINC000128905748.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 -38.916 kcal (2) G-P(sol) polarization free energy of solvation -30.443 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -69.359 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -7.497 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -37.940 kcal (6) G-S(sol) free energy of system = (1) + (5) -76.856 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.79 seconds