Wall clock time and date at job start Sat Apr 11 2020 06:12:11 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 1.53003 * 1 3 3 O 1.42900 * 109.46672 * 2 1 4 4 C 1.42899 * 113.99910 * 180.02562 * 3 2 1 5 5 H 1.09004 * 112.87261 * 18.71963 * 4 3 2 6 6 C 1.53886 * 113.72288 * 247.36762 * 4 3 2 7 7 C 1.53884 * 87.18123 * 270.48435 * 6 4 3 8 8 H 1.09002 * 113.64294 * 89.50222 * 7 6 4 9 9 N 1.46499 * 113.72131 * 220.47972 * 7 6 4 10 10 C 1.34773 * 120.00276 * 253.97343 * 9 7 6 11 11 O 1.21585 * 119.99857 * 0.02562 * 10 9 7 12 12 N 1.34777 * 120.00089 * 180.02562 * 10 9 7 13 13 C 1.46494 * 120.00084 * 179.97438 * 12 10 9 14 14 C 1.52998 * 109.47267 * 180.02562 * 13 12 10 15 15 C 1.53004 * 109.47272 * 299.99975 * 14 13 12 16 16 C 1.53001 * 109.47182 * 60.00221 * 14 13 12 17 17 C 1.50701 * 109.47386 * 180.02562 * 14 13 12 18 18 H 1.08007 * 119.99867 * 0.02562 * 17 14 13 19 19 C 1.37875 * 120.00200 * 179.97438 * 17 14 13 20 20 N 1.31511 * 120.00096 * 359.97438 * 19 17 14 21 21 Si 1.86799 * 120.00113 * 179.97438 * 19 17 14 22 22 H 1.48504 * 109.46956 * 0.02562 * 21 19 17 23 23 H 1.48504 * 109.47416 * 119.99894 * 21 19 17 24 24 H 1.48497 * 109.47128 * 240.00141 * 21 19 17 25 25 C 1.53188 * 113.64328 * 150.00351 * 4 3 2 26 26 C 1.53857 * 114.62774 * 333.40599 * 25 4 3 27 27 C 1.55436 * 102.04762 * 208.55458 * 26 25 4 28 28 C 1.54996 * 101.01592 * 33.67344 * 27 26 25 29 29 O 1.42626 * 115.40467 * 206.57443 * 25 4 3 30 30 H 1.09007 * 109.46792 * 179.97438 * 1 2 3 31 31 H 1.09002 * 109.47310 * 299.99988 * 1 2 3 32 32 H 1.09000 * 109.47263 * 59.99845 * 1 2 3 33 33 H 1.08996 * 109.46936 * 240.00167 * 2 1 3 34 34 H 1.08997 * 109.46833 * 119.99899 * 2 1 3 35 35 H 1.09001 * 113.60153 * 155.90632 * 6 4 3 36 36 H 1.09004 * 113.59617 * 25.05764 * 6 4 3 37 37 H 0.97003 * 119.99470 * 73.97715 * 9 7 6 38 38 H 0.97003 * 119.99656 * 0.02562 * 12 10 9 39 39 H 1.08996 * 109.47316 * 300.00222 * 13 12 10 40 40 H 1.09002 * 109.47204 * 59.99915 * 13 12 10 41 41 H 1.09004 * 109.46485 * 59.99955 * 15 14 13 42 42 H 1.08995 * 109.47089 * 179.97438 * 15 14 13 43 43 H 1.08996 * 109.46839 * 300.00404 * 15 14 13 44 44 H 1.08996 * 109.47040 * 60.00055 * 16 14 13 45 45 H 1.09005 * 109.47195 * 180.02562 * 16 14 13 46 46 H 1.09001 * 109.47009 * 299.99655 * 16 14 13 47 47 H 0.97001 * 120.00482 * 180.02562 * 20 19 17 48 48 H 1.09006 * 110.91541 * 326.74099 * 26 25 4 49 49 H 1.08994 * 110.91354 * 90.36141 * 26 25 4 50 50 H 1.09000 * 111.11038 * 275.73647 * 27 26 25 51 51 H 1.09003 * 111.11182 * 151.61702 * 27 26 25 52 52 H 1.08998 * 110.30210 * 204.94359 * 28 27 26 53 53 H 1.08995 * 110.29735 * 82.79466 * 28 27 26 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 8 2.0063 1.3473 0.0000 4 6 3.4308 1.4602 -0.0006 5 1 3.9282 0.5455 -0.3233 6 6 4.0057 2.0494 1.2996 7 6 3.8530 3.4357 0.6493 8 1 2.8838 3.8999 0.8318 9 7 4.9757 4.3384 0.9156 10 6 4.8291 5.3582 1.7844 11 8 3.7652 5.5288 2.3476 12 7 5.8619 6.1890 2.0289 13 6 5.7023 7.2978 2.9729 14 6 7.0136 8.0805 3.0666 15 6 8.1280 7.1522 3.5539 16 6 7.3772 8.6335 1.6871 17 6 6.8497 9.2208 4.0381 18 1 5.9049 9.3719 4.5391 19 6 7.9062 10.0706 4.2883 20 7 9.0572 9.8858 3.6796 21 14 7.7029 11.4845 5.4921 22 1 6.3223 11.4742 6.0390 23 1 8.6761 11.3324 6.6034 24 1 7.9486 12.7704 4.7913 25 6 3.9469 2.7204 -0.7022 26 6 3.0109 3.2784 -1.7883 27 6 4.0122 3.9696 -2.7557 28 6 5.2407 3.0331 -2.6291 29 8 5.2595 2.6210 -1.2511 30 1 -0.3633 -1.0277 -0.0005 31 1 -0.3634 0.5138 0.8900 32 1 -0.3634 0.5139 -0.8900 33 1 1.8933 -0.5138 -0.8900 34 1 1.8933 -0.5138 0.8900 35 1 5.0417 1.7666 1.4862 36 1 3.3628 1.9013 2.1674 37 1 5.8246 4.2021 0.4664 38 1 6.7106 6.0530 1.5792 39 1 4.9088 7.9593 2.6256 40 1 5.4429 6.9039 3.9556 41 1 8.2467 6.3272 2.8514 42 1 9.0622 7.7098 3.6202 43 1 7.8689 6.7583 4.5366 44 1 6.5833 9.2948 1.3400 45 1 8.3116 9.1908 1.7538 46 1 7.4960 7.8085 0.9847 47 1 9.8007 10.4834 3.8558 48 1 2.4758 2.4733 -2.2921 49 1 2.3140 4.0027 -1.3668 50 1 4.2510 4.9783 -2.4186 51 1 3.6292 3.9791 -3.7762 52 1 6.1549 3.5733 -2.8749 53 1 5.1250 2.1674 -3.2812 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 ZINC000458668983.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 06:12:11 Heat of formation + Delta-G solvation = -100.942993 kcal Electronic energy + Delta-G solvation = -31189.548292 eV Core-core repulsion = 27062.208817 eV Total energy + Delta-G solvation = -4127.339475 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.220 amu Computer time = 0.61 seconds Orbital eigenvalues (eV) -41.18150 -39.20305 -38.15004 -36.52887 -35.67942 -33.29030 -32.74829 -32.37446 -31.07468 -30.49509 -27.88411 -25.73314 -25.66863 -25.13432 -23.84873 -23.40607 -22.85266 -21.93693 -20.39866 -19.79741 -18.71507 -18.09927 -17.20704 -16.88087 -16.35259 -15.89781 -15.79396 -15.38993 -15.04966 -14.81286 -14.67158 -14.06948 -13.93632 -13.73531 -13.66007 -13.26751 -13.06301 -12.96307 -12.77759 -12.60510 -12.56755 -12.12197 -12.05174 -11.94889 -11.66427 -11.50690 -11.35381 -11.21311 -11.15574 -10.88944 -10.83837 -10.69519 -10.62064 -10.32792 -10.16645 -9.95721 -9.66683 -9.60635 -9.57449 -9.24296 -8.77678 -8.72942 -8.37137 -8.09485 -5.98097 -4.07632 2.83305 3.23245 3.29936 3.38452 3.43998 3.64964 3.78420 4.16178 4.26844 4.42179 4.43341 4.59247 4.70534 4.73312 4.78587 4.80447 4.88218 4.98686 5.02633 5.07120 5.23113 5.28675 5.38798 5.43694 5.46778 5.54626 5.57056 5.74223 5.77422 5.83774 5.87538 5.94976 5.98305 6.29206 6.43392 6.56047 6.58840 6.81700 6.87160 6.89025 6.97764 7.03467 7.09095 7.18571 7.40299 7.53778 7.61392 7.74466 8.06341 8.17910 8.43643 8.60531 8.92714 9.16025 9.57881 11.03356 Molecular weight = 340.22amu Principal moments of inertia in cm(-1) A = 0.019933 B = 0.002316 C = 0.002188 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1404.393814 B =12086.745713 C =12795.761879 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.152 4.152 2 C 0.057 3.943 3 O -0.358 6.358 4 C 0.064 3.936 5 H 0.083 0.917 6 C -0.167 4.167 7 C 0.160 3.840 8 H 0.124 0.876 9 N -0.736 5.736 10 C 0.697 3.303 11 O -0.602 6.602 12 N -0.733 5.733 13 C 0.151 3.849 14 C 0.055 3.945 15 C -0.130 4.130 16 C -0.129 4.129 17 C -0.502 4.502 18 H 0.058 0.942 19 C 0.065 3.935 20 N -0.886 5.886 21 Si 0.893 3.107 22 H -0.273 1.273 23 H -0.285 1.285 24 H -0.285 1.285 25 C 0.081 3.919 26 C -0.128 4.128 27 C -0.159 4.159 28 C 0.050 3.950 29 O -0.350 6.350 30 H 0.070 0.930 31 H 0.065 0.935 32 H 0.063 0.937 33 H 0.048 0.952 34 H 0.050 0.950 35 H 0.095 0.905 36 H 0.080 0.920 37 H 0.399 0.601 38 H 0.393 0.607 39 H 0.051 0.949 40 H 0.051 0.949 41 H 0.006 0.994 42 H 0.084 0.916 43 H 0.026 0.974 44 H 0.026 0.974 45 H 0.084 0.916 46 H 0.006 0.994 47 H 0.258 0.742 48 H 0.080 0.920 49 H 0.087 0.913 50 H 0.081 0.919 51 H 0.082 0.918 52 H 0.090 0.910 53 H 0.061 0.939 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -9.729 -20.191 -14.416 26.648 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 -0.209 4.209 2 C -0.019 4.019 3 O -0.277 6.277 4 C 0.005 3.995 5 H 0.101 0.899 6 C -0.207 4.207 7 C 0.053 3.947 8 H 0.142 0.858 9 N -0.392 5.392 10 C 0.397 3.603 11 O -0.481 6.481 12 N -0.388 5.388 13 C 0.028 3.972 14 C 0.054 3.946 15 C -0.187 4.187 16 C -0.187 4.187 17 C -0.541 4.541 18 H 0.076 0.924 19 C -0.136 4.136 20 N -0.525 5.525 21 Si 0.721 3.279 22 H -0.198 1.198 23 H -0.211 1.211 24 H -0.211 1.211 25 C 0.039 3.961 26 C -0.166 4.166 27 C -0.196 4.196 28 C -0.026 4.026 29 O -0.268 6.268 30 H 0.089 0.911 31 H 0.084 0.916 32 H 0.082 0.918 33 H 0.066 0.934 34 H 0.069 0.931 35 H 0.114 0.886 36 H 0.099 0.901 37 H 0.233 0.767 38 H 0.228 0.772 39 H 0.069 0.931 40 H 0.070 0.930 41 H 0.025 0.975 42 H 0.103 0.897 43 H 0.045 0.955 44 H 0.045 0.955 45 H 0.103 0.897 46 H 0.025 0.975 47 H 0.069 0.931 48 H 0.099 0.901 49 H 0.106 0.894 50 H 0.100 0.900 51 H 0.101 0.899 52 H 0.108 0.892 53 H 0.079 0.921 Dipole moment (debyes) X Y Z Total from point charges -10.464 -19.804 -13.765 26.290 hybrid contribution 0.795 0.406 0.086 0.897 sum -9.669 -19.399 -13.679 25.630 Atomic orbital electron populations 1.21751 0.93549 1.02256 1.03356 1.22558 0.95632 0.83599 1.00147 1.87884 1.18879 1.26492 1.94479 1.23153 0.81899 0.97771 0.96697 0.89889 1.23989 1.01997 0.96920 0.97777 1.22557 0.91946 0.88156 0.92038 0.85819 1.44933 1.15643 1.30901 1.47680 1.16133 0.84638 0.79508 0.80011 1.90870 1.26966 1.75463 1.54789 1.45500 1.13442 1.31569 1.48244 1.21555 1.00109 0.85417 0.90116 1.18371 0.89073 0.92884 0.94233 1.21815 1.03050 0.96676 0.97185 1.21811 1.03001 0.98322 0.95557 1.21034 0.98067 1.11015 1.23993 0.92376 1.24884 0.95199 0.97545 0.95998 1.69818 1.02230 1.37930 1.42553 0.86521 0.78217 0.82185 0.80992 1.19752 1.21113 1.21112 1.23412 0.83828 0.94685 0.94148 1.22826 0.97737 1.00600 0.95438 1.23318 0.95537 1.00175 1.00580 1.23512 0.99297 0.97137 0.82669 1.88263 1.26192 1.87140 1.25234 0.91104 0.91589 0.91838 0.93400 0.93140 0.88616 0.90122 0.76659 0.77245 0.93061 0.93038 0.97523 0.89689 0.95482 0.95498 0.89703 0.97535 0.93134 0.90096 0.89405 0.89996 0.89935 0.89200 0.92072 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 -0.96 10.28 37.16 0.38 -0.58 16 2 C 0.06 0.42 6.50 37.16 0.24 0.66 16 3 O -0.36 -3.60 9.46 -35.23 -0.33 -3.94 16 4 C 0.06 0.64 4.10 -26.17 -0.11 0.53 16 5 H 0.08 0.73 7.87 -51.93 -0.41 0.32 16 6 C -0.17 -1.94 7.72 -25.81 -0.20 -2.14 16 7 C 0.16 2.11 3.70 -67.37 -0.25 1.86 16 8 H 0.12 1.89 7.28 -51.93 -0.38 1.51 16 9 N -0.74 -10.70 5.34 -58.12 -0.31 -11.01 16 10 C 0.70 13.08 8.57 -86.92 -0.74 12.34 16 11 O -0.60 -13.58 15.96 5.29 0.08 -13.50 16 12 N -0.73 -13.80 4.96 -65.23 -0.32 -14.12 16 13 C 0.15 3.35 4.50 -4.05 -0.02 3.33 16 14 C 0.06 1.31 0.50 -155.66 -0.08 1.23 16 15 C -0.13 -2.99 8.08 37.16 0.30 -2.69 16 16 C -0.13 -2.96 8.08 37.16 0.30 -2.66 16 17 C -0.50 -13.38 8.01 -34.44 -0.28 -13.65 16 18 H 0.06 1.57 7.74 -52.48 -0.41 1.16 16 19 C 0.06 1.72 5.15 -17.82 -0.09 1.63 16 20 N -0.89 -23.88 9.35 55.43 0.52 -23.36 16 21 Si 0.89 20.99 29.54 -169.99 -5.02 15.97 16 22 H -0.27 -6.43 7.11 56.52 0.40 -6.02 16 23 H -0.28 -6.69 7.11 56.52 0.40 -6.29 16 24 H -0.28 -6.68 7.11 56.52 0.40 -6.28 16 25 C 0.08 0.85 1.41 -89.97 -0.13 0.72 16 26 C -0.13 -1.20 5.78 -24.99 -0.14 -1.34 16 27 C -0.16 -1.29 7.16 -24.38 -0.17 -1.46 16 28 C 0.05 0.40 7.79 38.21 0.30 0.70 16 29 O -0.35 -3.67 10.10 -35.23 -0.36 -4.02 16 30 H 0.07 0.32 8.14 -51.93 -0.42 -0.10 16 31 H 0.07 0.46 8.14 -51.93 -0.42 0.04 16 32 H 0.06 0.40 8.14 -51.93 -0.42 -0.02 16 33 H 0.05 0.30 8.14 -51.93 -0.42 -0.12 16 34 H 0.05 0.35 8.14 -51.93 -0.42 -0.07 16 35 H 0.10 1.09 8.14 -51.93 -0.42 0.66 16 36 H 0.08 0.98 8.14 -51.93 -0.42 0.56 16 37 H 0.40 5.14 7.85 -40.82 -0.32 4.81 16 38 H 0.39 6.70 6.18 -40.82 -0.25 6.45 16 39 H 0.05 1.20 8.14 -51.93 -0.42 0.77 16 40 H 0.05 1.21 8.14 -51.93 -0.42 0.78 16 41 H 0.01 0.12 6.86 -51.93 -0.36 -0.24 16 42 H 0.08 2.15 6.07 -51.93 -0.32 1.84 16 43 H 0.03 0.62 8.14 -51.93 -0.42 0.19 16 44 H 0.03 0.61 8.14 -51.93 -0.42 0.19 16 45 H 0.08 2.14 6.07 -51.93 -0.32 1.83 16 46 H 0.01 0.12 6.86 -51.93 -0.36 -0.24 16 47 H 0.26 6.71 8.31 -40.82 -0.34 6.37 16 48 H 0.08 0.69 7.94 -51.93 -0.41 0.27 16 49 H 0.09 0.90 7.78 -51.93 -0.40 0.49 16 50 H 0.08 0.76 8.14 -51.93 -0.42 0.34 16 51 H 0.08 0.53 8.14 -51.93 -0.42 0.10 16 52 H 0.09 0.64 8.14 -51.93 -0.42 0.22 16 53 H 0.06 0.42 8.14 -51.93 -0.42 -0.01 16 LS Contribution 412.31 15.07 6.21 6.21 Total: -1.00 -30.14 412.31 -9.62 -39.75 By element: Atomic # 1 Polarization: 18.93 SS G_CDS: -9.40 Total: 9.53 kcal Atomic # 6 Polarization: -0.83 SS G_CDS: -0.69 Total: -1.52 kcal Atomic # 7 Polarization: -48.38 SS G_CDS: -0.12 Total: -48.49 kcal Atomic # 8 Polarization: -20.85 SS G_CDS: -0.60 Total: -21.46 kcal Atomic # 14 Polarization: 20.99 SS G_CDS: -5.02 Total: 15.97 kcal Total LS contribution 6.21 Total: 6.21 kcal Total: -30.14 -9.62 -39.75 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. ZINC000458668983.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 -61.189 kcal (2) G-P(sol) polarization free energy of solvation -30.135 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -91.324 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -9.619 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -39.754 kcal (6) G-S(sol) free energy of system = (1) + (5) -100.943 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.61 seconds