Wall clock time and date at job start Sat Apr 11 2020 06:11:02 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 1.53004 * 1 3 3 C 1.52999 * 109.46693 * 2 1 4 4 O 1.42905 * 109.47280 * 179.97438 * 3 2 1 5 5 C 1.42892 * 114.00263 * 179.97438 * 4 3 2 6 6 C 1.50703 * 109.47129 * 179.97438 * 5 4 3 7 7 O 1.21278 * 120.00078 * 0.02562 * 6 5 4 8 8 N 1.34780 * 120.00041 * 179.97438 * 6 5 4 9 9 C 1.48195 * 127.79806 * 359.97438 * 8 6 5 10 10 C 1.54516 * 104.63274 * 140.72285 * 9 8 6 11 11 H 1.09002 * 110.37660 * 264.84339 * 10 9 8 12 12 C 1.53002 * 110.37355 * 142.60699 * 10 9 8 13 13 N 1.46506 * 109.47042 * 67.96395 * 12 10 9 14 14 C 1.36929 * 119.99807 * 179.97438 * 13 12 10 15 15 H 1.08004 * 120.00341 * 0.27647 * 14 13 12 16 16 C 1.38815 * 120.00031 * 179.97438 * 14 13 12 17 17 N 1.31617 * 119.99916 * 0.02562 * 16 14 13 18 18 Si 1.86803 * 119.99958 * 180.02562 * 16 14 13 19 19 H 1.48500 * 109.46986 * 90.00489 * 18 16 14 20 20 H 1.48496 * 109.47029 * 210.00506 * 18 16 14 21 21 H 1.48499 * 109.47352 * 330.00336 * 18 16 14 22 22 C 1.53772 * 104.87683 * 23.72590 * 10 9 8 23 23 C 1.48254 * 127.79822 * 179.97438 * 8 6 5 24 24 C 1.52594 * 110.26891 * 241.00370 * 22 10 9 25 25 C 1.53201 * 109.20350 * 182.30075 * 24 22 10 26 26 O 1.42905 * 109.33928 * 56.67490 * 25 24 22 27 27 C 1.42910 * 114.21649 * 298.38377 * 26 25 24 28 28 C 1.52592 * 110.27988 * 118.84871 * 22 10 9 29 29 H 1.08992 * 109.47345 * 60.00304 * 1 2 3 30 30 H 1.09008 * 109.46715 * 180.02562 * 1 2 3 31 31 H 1.08998 * 109.47177 * 299.99512 * 1 2 3 32 32 H 1.08989 * 109.47216 * 239.99897 * 2 1 3 33 33 H 1.09004 * 109.46986 * 119.99555 * 2 1 3 34 34 H 1.09003 * 109.47477 * 59.99882 * 3 2 1 35 35 H 1.08997 * 109.47376 * 299.99697 * 3 2 1 36 36 H 1.09004 * 109.47252 * 60.00151 * 5 4 3 37 37 H 1.08997 * 109.47529 * 300.00099 * 5 4 3 38 38 H 1.08999 * 110.40106 * 21.92768 * 9 8 6 39 39 H 1.08999 * 110.40230 * 259.51308 * 9 8 6 40 40 H 1.08992 * 109.46974 * 307.95892 * 12 10 9 41 41 H 1.09000 * 109.46986 * 187.95956 * 12 10 9 42 42 H 0.96999 * 120.00076 * 359.97438 * 13 12 10 43 43 H 0.97000 * 120.00284 * 179.97438 * 17 16 14 44 44 H 1.08998 * 110.43196 * 337.88796 * 23 8 6 45 45 H 1.09010 * 110.42502 * 100.24993 * 23 8 6 46 46 H 1.09005 * 109.51384 * 302.21954 * 24 22 10 47 47 H 1.09004 * 109.51300 * 62.37791 * 24 22 10 48 48 H 1.08996 * 109.49104 * 296.71161 * 25 24 22 49 49 H 1.09005 * 109.51209 * 176.64980 * 25 24 22 50 50 H 1.09005 * 109.49640 * 301.65894 * 27 26 25 51 51 H 1.09003 * 109.51627 * 181.59327 * 27 26 25 52 52 H 1.08998 * 109.51463 * 297.61296 * 28 22 10 53 53 H 1.09000 * 109.51809 * 57.72552 * 28 22 10 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 2.0399 1.4425 0.0000 4 8 3.4690 1.4427 0.0006 5 6 4.0501 2.7481 0.0001 6 6 5.5524 2.6292 0.0014 7 8 6.0741 1.5343 0.0022 8 7 6.3163 3.7396 0.0007 9 6 5.8664 5.1516 -0.0020 10 6 6.8494 5.8763 0.9446 11 1 6.4320 5.9390 1.9496 12 6 7.1676 7.2751 0.4127 13 7 5.9698 8.1144 0.4986 14 6 6.0145 9.4165 0.0773 15 1 6.9316 9.8236 -0.3224 16 6 4.8795 10.2115 0.1582 17 7 3.7604 9.7139 0.6403 18 14 4.9404 11.9877 -0.4171 19 1 4.5816 12.0543 -1.8566 20 1 3.9764 12.7967 0.3712 21 1 6.3114 12.5242 -0.2233 22 6 8.1148 5.0025 0.9439 23 6 7.7965 3.8242 0.0023 24 6 8.4042 4.4902 2.3518 25 6 9.6991 3.6717 2.3339 26 8 10.7612 4.4774 1.8192 27 6 10.5617 4.9219 0.4757 28 6 9.3049 5.7957 0.4119 29 1 -0.3633 0.5137 -0.8899 30 1 -0.3633 -1.0278 0.0005 31 1 -0.3633 0.5137 0.8900 32 1 1.8934 -0.5138 -0.8899 33 1 1.8934 -0.5138 0.8901 34 1 1.6766 1.9564 0.8900 35 1 1.6766 1.9563 -0.8900 36 1 3.7281 3.2895 0.8896 37 1 3.7289 3.2885 -0.8903 38 1 4.8476 5.2264 0.3783 39 1 5.9293 5.5686 -1.0070 40 1 7.4879 7.2044 -0.6267 41 1 7.9650 7.7180 1.0094 42 1 5.1451 7.7476 0.8538 43 1 2.9674 10.2695 0.6971 44 1 8.2299 2.9018 0.3886 45 1 8.1671 4.0259 -1.0029 46 1 8.5171 5.3355 3.0308 47 1 7.5799 3.8606 2.6868 48 1 9.5667 2.7955 1.6992 49 1 9.9425 3.3531 3.3476 50 1 10.4383 4.0588 -0.1785 51 1 11.4254 5.5030 0.1523 52 1 9.1158 6.0868 -0.6214 53 1 9.4494 6.6880 1.0210 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 ZINC001186292613.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 06:11:02 Heat of formation + Delta-G solvation = -118.136900 kcal Electronic energy + Delta-G solvation = -31222.338165 eV Core-core repulsion = 27094.253106 eV Total energy + Delta-G solvation = -4128.085059 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.220 amu Computer time = 0.81 seconds Orbital eigenvalues (eV) -40.98301 -39.29563 -37.91262 -37.18888 -34.69926 -33.89277 -33.47279 -31.76055 -31.15826 -29.38117 -29.03628 -26.72978 -25.73075 -25.30761 -24.22872 -23.78397 -22.31070 -21.80013 -20.75698 -19.40850 -18.53712 -17.53983 -17.02406 -16.71829 -16.53477 -16.09781 -15.86740 -15.76031 -15.59590 -14.93364 -14.89074 -14.50906 -14.47559 -14.25868 -13.75752 -13.60608 -13.38023 -13.11577 -12.79736 -12.53877 -12.41910 -12.33920 -12.23940 -12.20885 -12.04669 -11.85047 -11.56685 -11.29802 -11.15369 -11.13818 -11.11787 -11.03274 -10.86118 -10.70938 -10.24447 -10.12475 -10.03616 -9.85484 -9.78371 -9.74517 -9.41052 -8.94167 -8.71646 -7.00954 -5.84960 -3.13728 2.58206 2.58660 3.38269 3.44245 3.45359 3.69002 3.83884 4.30471 4.45263 4.56766 4.59206 4.65713 4.71058 4.81998 4.97154 5.01192 5.04172 5.06161 5.08766 5.10367 5.15868 5.24888 5.25451 5.29166 5.34940 5.43484 5.47722 5.49840 5.52557 5.62187 5.65485 5.68470 5.72497 5.79855 5.87666 5.87731 5.90751 5.96166 5.99507 6.03798 6.11703 6.23440 6.28067 6.35670 6.65952 6.73529 6.90784 7.15225 7.50929 7.62939 8.14104 8.33740 9.45463 10.01285 10.35643 11.37793 Molecular weight = 340.22amu Principal moments of inertia in cm(-1) A = 0.006559 B = 0.003700 C = 0.002460 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 4268.199356 B = 7566.481193 C =11381.021594 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.150 4.150 2 C -0.122 4.122 3 C 0.059 3.941 4 O -0.367 6.367 5 C 0.049 3.951 6 C 0.538 3.462 7 O -0.529 6.529 8 N -0.622 5.622 9 C 0.107 3.893 10 C -0.097 4.097 11 H 0.085 0.915 12 C 0.162 3.838 13 N -0.733 5.733 14 C -0.240 4.240 15 H 0.070 0.930 16 C -0.012 4.012 17 N -0.933 5.933 18 Si 0.906 3.094 19 H -0.290 1.290 20 H -0.291 1.291 21 H -0.282 1.282 22 C -0.064 4.064 23 C 0.115 3.885 24 C -0.139 4.139 25 C 0.060 3.940 26 O -0.383 6.383 27 C 0.058 3.942 28 C -0.145 4.145 29 H 0.056 0.944 30 H 0.061 0.939 31 H 0.057 0.943 32 H 0.071 0.929 33 H 0.071 0.929 34 H 0.052 0.948 35 H 0.052 0.948 36 H 0.082 0.918 37 H 0.082 0.918 38 H 0.081 0.919 39 H 0.083 0.917 40 H 0.024 0.976 41 H 0.028 0.972 42 H 0.382 0.618 43 H 0.255 0.745 44 H 0.082 0.918 45 H 0.073 0.927 46 H 0.078 0.922 47 H 0.072 0.928 48 H 0.050 0.950 49 H 0.092 0.908 50 H 0.048 0.952 51 H 0.094 0.906 52 H 0.083 0.917 53 H 0.087 0.913 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges 2.821 -15.914 -0.089 16.162 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 -0.207 4.207 2 C -0.160 4.160 3 C -0.018 4.018 4 O -0.285 6.285 5 C -0.031 4.031 6 C 0.326 3.674 7 O -0.405 6.405 8 N -0.358 5.358 9 C -0.016 4.016 10 C -0.117 4.117 11 H 0.103 0.897 12 C 0.034 3.966 13 N -0.377 5.377 14 C -0.371 4.371 15 H 0.088 0.912 16 C -0.208 4.208 17 N -0.582 5.582 18 Si 0.737 3.263 19 H -0.217 1.217 20 H -0.218 1.218 21 H -0.207 1.207 22 C -0.065 4.065 23 C -0.007 4.007 24 C -0.177 4.177 25 C -0.017 4.017 26 O -0.302 6.302 27 C -0.018 4.018 28 C -0.183 4.183 29 H 0.075 0.925 30 H 0.080 0.920 31 H 0.076 0.924 32 H 0.089 0.911 33 H 0.089 0.911 34 H 0.070 0.930 35 H 0.070 0.930 36 H 0.100 0.900 37 H 0.100 0.900 38 H 0.099 0.901 39 H 0.101 0.899 40 H 0.042 0.958 41 H 0.046 0.954 42 H 0.216 0.784 43 H 0.065 0.935 44 H 0.100 0.900 45 H 0.091 0.909 46 H 0.097 0.903 47 H 0.091 0.909 48 H 0.068 0.932 49 H 0.110 0.890 50 H 0.066 0.934 51 H 0.112 0.888 52 H 0.101 0.899 53 H 0.105 0.895 Dipole moment (debyes) X Y Z Total from point charges 3.337 -16.586 -0.051 16.919 hybrid contribution -0.908 1.313 -0.366 1.638 sum 2.429 -15.273 -0.417 15.471 Atomic orbital electron populations 1.21701 0.94667 1.02206 1.02149 1.21439 0.95608 0.95440 1.03508 1.22649 0.80420 0.98184 1.00554 1.87958 1.19627 1.25397 1.95513 1.22151 0.91256 0.86675 1.03036 1.19793 0.88236 0.82961 0.76446 1.90706 1.74581 1.25797 1.49440 1.48978 1.07387 1.06231 1.73175 1.22651 0.99097 0.78820 1.01003 1.22302 0.93662 0.95596 1.00107 0.89697 1.20850 0.91114 0.87360 0.97255 1.42380 1.08738 1.09881 1.76738 1.19197 0.96223 0.87561 1.34109 0.91171 1.24722 0.95836 0.98372 1.01875 1.69642 1.00932 1.35966 1.51645 0.86208 0.77128 0.84862 0.78096 1.21722 1.21773 1.20748 1.21112 0.95540 0.94744 0.95154 1.22511 0.80071 0.98783 0.99376 1.22148 0.98126 1.01036 0.96354 1.22646 0.86990 0.92630 0.99450 1.87907 1.43233 1.69862 1.29202 1.22682 0.98294 0.97285 0.83588 1.22308 0.93567 0.99390 1.03002 0.92452 0.92038 0.92437 0.91070 0.91053 0.92993 0.93021 0.90014 0.90041 0.90051 0.89900 0.95832 0.95398 0.78423 0.93499 0.90013 0.90901 0.90323 0.90918 0.93153 0.88989 0.93406 0.88825 0.89897 0.89458 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 -0.15 -1.04 9.91 37.16 0.37 -0.67 16 2 C -0.12 -1.10 6.30 -26.73 -0.17 -1.26 16 3 C 0.06 0.60 5.94 37.16 0.22 0.82 16 4 O -0.37 -5.04 9.88 -55.14 -0.54 -5.59 16 5 C 0.05 0.61 5.40 36.01 0.19 0.80 16 6 C 0.54 8.08 7.99 -10.98 -0.09 7.99 16 7 O -0.53 -9.82 16.77 -14.35 -0.24 -10.06 16 8 N -0.62 -8.39 3.32 -169.24 -0.56 -8.95 16 9 C 0.11 1.45 6.22 -2.31 -0.01 1.44 16 10 C -0.10 -1.37 2.75 -89.42 -0.25 -1.62 16 11 H 0.08 1.27 7.70 -51.93 -0.40 0.87 16 12 C 0.16 2.84 4.39 -4.04 -0.02 2.82 16 13 N -0.73 -16.84 5.46 -59.91 -0.33 -17.17 16 14 C -0.24 -6.30 9.99 -15.06 -0.15 -6.45 16 15 H 0.07 1.80 7.83 -52.48 -0.41 1.39 16 16 C -0.01 -0.33 5.50 -17.43 -0.10 -0.42 16 17 N -0.93 -26.80 13.06 55.49 0.72 -26.07 16 18 Si 0.91 21.58 29.55 -169.99 -5.02 16.55 16 19 H -0.29 -6.89 7.11 56.52 0.40 -6.48 16 20 H -0.29 -7.04 7.11 56.52 0.40 -6.64 16 21 H -0.28 -6.56 7.11 56.52 0.40 -6.16 16 22 C -0.06 -0.77 0.69 -153.92 -0.11 -0.88 16 23 C 0.11 1.42 5.13 -2.47 -0.01 1.41 16 24 C -0.14 -1.61 4.68 -26.84 -0.13 -1.73 16 25 C 0.06 0.65 6.64 37.26 0.25 0.90 16 26 O -0.38 -4.71 10.75 -35.23 -0.38 -5.09 16 27 C 0.06 0.61 6.65 37.26 0.25 0.86 16 28 C -0.14 -1.65 3.63 -26.84 -0.10 -1.75 16 29 H 0.06 0.38 8.14 -51.93 -0.42 -0.05 16 30 H 0.06 0.37 8.14 -51.92 -0.42 -0.05 16 31 H 0.06 0.38 8.14 -51.93 -0.42 -0.04 16 32 H 0.07 0.66 8.14 -51.94 -0.42 0.24 16 33 H 0.07 0.66 8.14 -51.93 -0.42 0.24 16 34 H 0.05 0.48 8.14 -51.93 -0.42 0.06 16 35 H 0.05 0.47 8.14 -51.93 -0.42 0.05 16 36 H 0.08 0.90 7.95 -51.93 -0.41 0.49 16 37 H 0.08 0.89 8.14 -51.93 -0.42 0.47 16 38 H 0.08 1.08 7.31 -51.93 -0.38 0.70 16 39 H 0.08 1.19 7.78 -51.93 -0.40 0.78 16 40 H 0.02 0.42 6.93 -51.93 -0.36 0.06 16 41 H 0.03 0.51 6.51 -51.93 -0.34 0.17 16 42 H 0.38 9.20 7.56 -40.82 -0.31 8.89 16 43 H 0.26 7.14 8.31 -40.82 -0.34 6.80 16 44 H 0.08 1.06 5.94 -51.93 -0.31 0.75 16 45 H 0.07 0.85 7.79 -51.92 -0.40 0.45 16 46 H 0.08 0.95 8.14 -51.93 -0.42 0.53 16 47 H 0.07 0.86 8.14 -51.93 -0.42 0.44 16 48 H 0.05 0.54 6.53 -51.93 -0.34 0.20 16 49 H 0.09 0.88 8.14 -51.93 -0.42 0.46 16 50 H 0.05 0.46 7.55 -51.93 -0.39 0.07 16 51 H 0.09 0.86 8.14 -51.93 -0.42 0.43 16 52 H 0.08 0.92 6.93 -51.93 -0.36 0.56 16 53 H 0.09 1.10 6.55 -51.93 -0.34 0.76 16 LS Contribution 408.80 15.07 6.16 6.16 Total: -1.00 -32.14 408.80 -9.40 -41.54 By element: Atomic # 1 Polarization: 15.81 SS G_CDS: -9.37 Total: 6.44 kcal Atomic # 6 Polarization: 2.08 SS G_CDS: 0.16 Total: 2.24 kcal Atomic # 7 Polarization: -52.03 SS G_CDS: -0.16 Total: -52.20 kcal Atomic # 8 Polarization: -19.57 SS G_CDS: -1.16 Total: -20.74 kcal Atomic # 14 Polarization: 21.58 SS G_CDS: -5.02 Total: 16.55 kcal Total LS contribution 6.16 Total: 6.16 kcal Total: -32.14 -9.40 -41.54 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. ZINC001186292613.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 -76.599 kcal (2) G-P(sol) polarization free energy of solvation -32.137 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -108.736 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -9.401 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -41.538 kcal (6) G-S(sol) free energy of system = (1) + (5) -118.137 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.81 seconds