Wall clock time and date at job start Tue Mar 31 2020 05:42:55 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 * SM5.42R - SM5.42R CALCULATIONS WILL BE PERFORMED * - CHARGE MODEL 2 WILL BE USED (CM2A) * - THE SOLVENT IS WATER ******************************************************************************* 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 1.53002 * 1 3 3 H 1.09000 * 109.49333 * 2 1 4 4 C 1.53037 * 109.49628 * 120.06515 * 2 1 3 5 5 C 1.53044 * 109.53438 * 181.31218 * 4 2 1 6 6 C 1.53188 * 109.31559 * 298.64005 * 5 4 2 7 7 N 1.46922 * 108.77834 * 54.63186 * 6 5 4 8 8 S 1.65606 * 120.62954 * 126.36646 * 7 6 5 9 9 O 1.42100 * 106.40339 * 336.46442 * 8 7 6 10 10 O 1.42105 * 106.40145 * 203.54378 * 8 7 6 11 11 N 1.65599 * 107.21672 * 90.00453 * 8 7 6 12 12 C 1.46499 * 120.00017 * 270.00223 * 11 8 7 13 13 C 1.50701 * 109.46746 * 264.99950 * 12 11 8 14 14 H 1.07999 * 119.99985 * 359.97438 * 13 12 11 15 15 C 1.37885 * 119.99926 * 179.97438 * 13 12 11 16 16 N 1.31512 * 119.99895 * 0.02562 * 15 13 12 17 17 Si 1.86801 * 119.99839 * 179.97438 * 15 13 12 18 18 H 1.48503 * 109.47124 * 359.97438 * 17 15 13 19 19 H 1.48495 * 109.46765 * 120.00230 * 17 15 13 20 20 H 1.48497 * 109.46759 * 239.99966 * 17 15 13 21 21 C 1.46496 * 119.99940 * 89.99563 * 11 8 7 22 22 C 1.52993 * 109.47551 * 264.99958 * 21 11 8 23 23 N 1.46906 * 109.47378 * 180.02562 * 22 21 11 24 24 C 1.47012 * 110.99858 * 293.63700 * 23 22 21 25 25 C 1.53099 * 109.25354 * 177.60785 * 24 23 22 26 26 O 1.43012 * 109.26070 * 56.84880 * 25 24 23 27 27 C 1.43011 * 113.74024 * 301.32804 * 26 25 24 28 28 C 1.47017 * 110.99718 * 170.00300 * 23 22 21 29 29 C 1.46927 * 118.73841 * 306.64877 * 7 6 5 30 30 H 1.09010 * 109.46997 * 299.93094 * 1 2 3 31 31 H 1.08997 * 109.47425 * 59.92795 * 1 2 3 32 32 H 1.08996 * 109.47065 * 179.97438 * 1 2 3 33 33 H 1.09004 * 109.46203 * 61.30030 * 4 2 1 34 34 H 1.08996 * 109.46118 * 301.33372 * 4 2 1 35 35 H 1.08999 * 109.49634 * 178.68045 * 5 4 2 36 36 H 1.09005 * 109.51811 * 58.60630 * 5 4 2 37 37 H 1.09000 * 109.58573 * 294.84211 * 6 5 4 38 38 H 1.09005 * 109.58534 * 174.42077 * 6 5 4 39 39 H 1.09003 * 109.47151 * 24.99439 * 12 11 8 40 40 H 1.08993 * 109.47513 * 145.00181 * 12 11 8 41 41 H 0.97000 * 120.00003 * 179.97438 * 16 15 13 42 42 H 1.09004 * 109.46875 * 145.00164 * 21 11 8 43 43 H 1.09004 * 109.47522 * 25.00313 * 21 11 8 44 44 H 1.09004 * 109.46862 * 60.00198 * 22 21 11 45 45 H 1.09000 * 109.47250 * 300.00222 * 22 21 11 46 46 H 1.08994 * 109.50759 * 297.53771 * 24 23 22 47 47 H 1.08998 * 109.50836 * 57.67005 * 24 23 22 48 48 H 1.09003 * 109.50855 * 296.90739 * 25 24 23 49 49 H 1.09007 * 109.53971 * 176.80437 * 25 24 23 50 50 H 1.08998 * 109.50595 * 298.73803 * 27 26 25 51 51 H 1.08996 * 109.54397 * 178.62659 * 27 26 25 52 52 H 1.09004 * 109.50480 * 302.32206 * 28 23 22 53 53 H 1.08991 * 109.51010 * 62.41740 * 28 23 22 54 54 H 1.09003 * 109.58231 * 173.14291 * 29 7 6 55 55 H 1.09002 * 109.58257 * 293.56553 * 29 7 6 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 1 1.8937 1.0275 0.0000 4 6 2.0408 -0.7227 1.2485 5 6 3.5709 -0.6947 1.2661 6 6 4.1052 -1.4266 0.0310 7 7 3.5045 -0.8294 -1.1694 8 16 4.4587 -0.2847 -2.4085 9 8 5.7324 -0.0083 -1.8425 10 8 3.6921 0.6858 -3.1085 11 7 4.6759 -1.5512 -3.4531 12 6 5.8077 -2.4637 -3.2725 13 6 6.9555 -2.0186 -4.1417 14 1 6.8521 -1.1437 -4.7664 15 6 8.1377 -2.7282 -4.1393 16 7 8.2634 -3.7939 -3.3790 17 14 9.5602 -2.1768 -5.2173 18 1 9.1663 -0.9604 -5.9726 19 1 10.7374 -1.8716 -4.3652 20 1 9.9072 -3.2605 -6.1713 21 6 3.7364 -1.7591 -4.5577 22 6 2.6666 -2.7676 -4.1343 23 7 1.7247 -2.9765 -5.2422 24 6 0.9549 -1.7546 -5.5168 25 6 0.0313 -1.9979 -6.7133 26 8 -0.8126 -3.1190 -6.4375 27 6 -0.0958 -4.3263 -6.1662 28 6 0.8265 -4.1067 -4.9640 29 6 2.0415 -0.7190 -1.2470 30 1 -0.3633 0.5128 0.8907 31 1 -0.3634 0.5149 -0.8893 32 1 -0.3633 -1.0276 -0.0005 33 1 1.6967 -1.7570 1.2357 34 1 1.6582 -0.2239 2.1389 35 1 3.9334 -1.1891 2.1673 36 1 3.9163 0.3391 1.2542 37 1 3.8375 -2.4818 0.0873 38 1 5.1896 -1.3245 -0.0136 39 1 6.1184 -2.4549 -2.2278 40 1 5.5089 -3.4734 -3.5543 41 1 9.0949 -4.2934 -3.3776 42 1 4.2742 -2.1424 -5.4248 43 1 3.2616 -0.8120 -4.8141 44 1 2.1288 -2.3843 -3.2672 45 1 3.1413 -3.7147 -3.8780 46 1 0.3574 -1.4966 -4.6424 47 1 1.6388 -0.9371 -5.7451 48 1 0.6309 -2.2031 -7.6002 49 1 -0.5826 -1.1138 -6.8857 50 1 0.5002 -4.5993 -7.0370 51 1 -0.8010 -5.1267 -5.9424 52 1 1.4168 -5.0062 -4.7890 53 1 0.2276 -3.8866 -4.0804 54 1 1.7646 -0.1501 -2.1346 55 1 1.6020 -1.7152 -1.2971 RHF calculation, no. of doubly occupied orbitals= 70 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). S: (AM1): M.J.S. DEWAR, Y.-C. YUAN, INORGANIC CHEM., 29, 589 (1990) 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=WATER ZINC000069414919.mol2 55 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 05:42:55 Heat of formation + Delta-G solvation = -144.504682 kcal Electronic energy + Delta-G solvation = -35798.239978 eV Core-core repulsion = 31381.662624 eV Total energy + Delta-G solvation = -4416.577354 eV No. of doubly occupied orbitals = 70 Molecular weight (most abundant/longest-lived isotopes) = 375.202 amu Computer time = 1.56 seconds Orbital eigenvalues (eV) -40.55084 -39.71189 -38.46198 -38.03613 -36.92673 -36.31581 -34.54367 -34.42076 -32.77607 -32.15311 -30.96449 -28.81864 -27.69621 -26.81344 -25.51971 -24.99011 -24.56876 -23.17763 -22.79221 -21.34525 -21.11487 -19.78113 -19.06431 -18.44467 -18.32490 -17.64550 -17.25870 -17.03896 -16.62710 -16.20699 -16.05024 -15.92849 -15.87187 -15.49497 -15.38984 -15.20363 -15.09146 -14.69460 -14.48279 -14.44025 -14.38680 -13.87945 -13.63914 -13.54971 -13.34284 -13.20053 -13.08717 -13.04720 -12.99190 -12.88903 -12.79333 -12.61282 -12.51064 -12.40108 -12.28710 -12.14826 -12.01259 -11.78778 -11.77087 -11.68708 -11.47928 -11.39565 -11.27028 -10.67914 -10.60229 -10.04155 -9.83394 -9.37932 -8.21252 -6.31966 -0.43772 1.37156 1.39477 1.50868 1.90663 2.37758 2.47159 2.77991 2.99846 3.10369 3.30470 3.62092 3.81242 3.85772 3.88665 3.92581 4.02273 4.03896 4.10443 4.19006 4.23397 4.29834 4.33572 4.40571 4.43354 4.47764 4.53365 4.60893 4.65041 4.75155 4.76482 4.78716 4.85495 4.85857 4.90478 4.92583 4.97933 5.01654 5.03706 5.08168 5.13436 5.17977 5.23347 5.26811 5.40237 5.43600 5.50242 5.60781 5.70381 5.83950 5.97449 6.00569 6.10451 6.20280 6.75282 7.36553 8.86515 Molecular weight = 375.20amu Principal moments of inertia in cm(-1) A = 0.006185 B = 0.004605 C = 0.002967 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 4526.013350 B = 6078.477015 C = 9435.080626 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.139 4.139 2 C -0.106 4.106 3 H 0.060 0.940 4 C -0.105 4.105 5 C -0.129 4.129 6 C 0.112 3.888 7 N -1.002 6.002 8 S 2.785 3.215 9 O -1.006 7.006 10 O -1.007 7.007 11 N -0.993 5.993 12 C 0.278 3.722 13 C -0.547 4.547 14 H 0.048 0.952 15 C 0.017 3.983 16 N -0.921 5.921 17 Si 0.952 3.048 18 H -0.272 1.272 19 H -0.279 1.279 20 H -0.269 1.269 21 C 0.126 3.874 22 C 0.050 3.950 23 N -0.543 5.543 24 C 0.010 3.990 25 C 0.066 3.934 26 O -0.401 6.401 27 C 0.065 3.935 28 C 0.019 3.981 29 C 0.120 3.880 30 H 0.070 0.930 31 H 0.055 0.945 32 H 0.066 0.934 33 H 0.076 0.924 34 H 0.081 0.919 35 H 0.095 0.905 36 H 0.053 0.947 37 H 0.083 0.917 38 H 0.067 0.933 39 H 0.017 0.983 40 H 0.029 0.971 41 H 0.267 0.733 42 H 0.077 0.923 43 H 0.081 0.919 44 H 0.043 0.957 45 H 0.075 0.925 46 H 0.045 0.955 47 H 0.085 0.915 48 H 0.060 0.940 49 H 0.116 0.884 50 H 0.058 0.942 51 H 0.118 0.882 52 H 0.091 0.909 53 H 0.044 0.956 54 H 0.078 0.922 55 H 0.081 0.919 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -20.863 0.494 4.560 21.361 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 -0.197 4.197 2 C -0.126 4.126 3 H 0.079 0.921 4 C -0.142 4.142 5 C -0.168 4.168 6 C -0.013 4.013 7 N -0.844 5.844 8 S 2.796 3.204 9 O -0.990 6.990 10 O -0.991 6.991 11 N -0.833 5.833 12 C 0.155 3.845 13 C -0.586 4.586 14 H 0.066 0.934 15 C -0.183 4.183 16 N -0.561 5.561 17 Si 0.777 3.223 18 H -0.197 1.197 19 H -0.204 1.204 20 H -0.195 1.195 21 C 0.000 4.000 22 C -0.079 4.079 23 N -0.269 5.269 24 C -0.118 4.118 25 C -0.011 4.011 26 O -0.320 6.320 27 C -0.012 4.012 28 C -0.109 4.109 29 C -0.005 4.005 30 H 0.089 0.911 31 H 0.074 0.926 32 H 0.085 0.915 33 H 0.094 0.906 34 H 0.100 0.900 35 H 0.113 0.887 36 H 0.072 0.928 37 H 0.101 0.899 38 H 0.085 0.915 39 H 0.034 0.966 40 H 0.047 0.953 41 H 0.076 0.924 42 H 0.095 0.905 43 H 0.099 0.901 44 H 0.061 0.939 45 H 0.094 0.906 46 H 0.063 0.937 47 H 0.104 0.896 48 H 0.078 0.922 49 H 0.134 0.866 50 H 0.077 0.923 51 H 0.136 0.864 52 H 0.110 0.890 53 H 0.063 0.937 54 H 0.096 0.904 55 H 0.099 0.901 Dipole moment (debyes) X Y Z Total from point charges -20.283 1.119 4.062 20.716 hybrid contribution 1.250 0.071 0.193 1.267 sum -19.033 1.191 4.255 19.539 Atomic orbital electron populations 1.21742 0.92581 1.02813 1.02606 1.21421 0.97188 0.99310 0.94726 0.92135 1.21531 0.93906 1.01470 0.97340 1.21891 0.97230 1.00600 0.97114 1.21582 0.97418 0.98092 0.84183 1.58060 1.16846 1.77916 1.31530 1.01569 0.72271 0.73596 0.72956 1.93552 1.42334 1.84225 1.78885 1.93475 1.72784 1.58892 1.73909 1.57637 1.36030 1.48148 1.41491 1.18560 0.81742 0.88675 0.95541 1.21814 0.99282 1.11961 1.25587 0.93376 1.25660 1.00792 0.94943 0.96928 1.69996 1.27499 1.18395 1.40181 0.85600 0.79233 0.78550 0.78906 1.19665 1.20444 1.19456 1.21183 0.89703 0.99335 0.89784 1.22436 0.93310 1.00276 0.91916 1.62085 1.18082 1.05711 1.40980 1.22937 0.96653 0.93013 0.99235 1.22740 0.92763 0.89805 0.95772 1.87941 1.34171 1.19024 1.90837 1.22774 0.95001 0.87178 0.96259 1.22840 0.94966 0.94718 0.98369 1.21600 0.77639 1.01525 0.99686 0.91080 0.92550 0.91510 0.90579 0.89997 0.88701 0.92766 0.89894 0.91486 0.96550 0.95318 0.92383 0.90452 0.90111 0.93877 0.90615 0.93681 0.89630 0.92216 0.86649 0.92331 0.86363 0.89030 0.93728 0.90388 0.90095 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 18. 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 -1.95 9.20 71.98 0.66 -1.29 16 2 C -0.11 -2.04 2.86 -10.86 -0.03 -2.07 16 3 H 0.06 1.34 8.14 -2.39 -0.02 1.32 16 4 C -0.11 -1.75 5.17 30.62 0.16 -1.59 16 5 C -0.13 -2.74 6.08 30.67 0.19 -2.55 16 6 C 0.11 3.12 6.48 86.36 0.56 3.68 16 7 N -1.00 -30.63 3.35 -513.86 -1.72 -32.35 16 8 S 2.79 114.13 6.10 -56.49 -0.34 113.79 16 9 O -1.01 -50.20 15.70 -128.00 -2.01 -52.21 16 10 O -1.01 -42.11 15.27 -128.00 -1.95 -44.06 16 11 N -0.99 -41.55 2.82 -519.86 -1.47 -43.01 16 12 C 0.28 14.03 5.10 85.63 0.44 14.47 16 13 C -0.55 -31.18 9.38 25.60 0.24 -30.94 16 14 H 0.05 2.79 7.81 -2.91 -0.02 2.77 16 15 C 0.02 0.94 5.46 84.66 0.46 1.40 16 16 N -0.92 -53.62 13.29 21.45 0.28 -53.34 16 17 Si 0.95 45.00 29.54 68.60 2.03 47.03 16 18 H -0.27 -12.75 7.11 99.48 0.71 -12.05 16 19 H -0.28 -12.95 7.11 99.48 0.71 -12.24 16 20 H -0.27 -12.06 7.11 99.48 0.71 -11.35 16 21 C 0.13 4.48 5.61 86.38 0.48 4.96 16 22 C 0.05 1.43 5.28 86.30 0.46 1.89 16 23 N -0.54 -13.52 4.73 -895.21 -4.23 -17.75 16 24 C 0.01 0.22 5.44 86.31 0.47 0.69 16 25 C 0.07 1.29 7.01 72.02 0.50 1.79 16 26 O -0.40 -8.58 10.83 -148.98 -1.61 -10.20 16 27 C 0.06 1.17 7.01 72.02 0.50 1.67 16 28 C 0.02 0.39 5.65 86.32 0.49 0.87 16 29 C 0.12 2.85 4.80 86.22 0.41 3.26 16 30 H 0.07 0.83 8.14 -2.38 -0.02 0.81 16 31 H 0.06 0.81 8.14 -2.39 -0.02 0.79 16 32 H 0.07 0.81 8.14 -2.39 -0.02 0.79 16 33 H 0.08 1.12 8.14 -2.38 -0.02 1.10 16 34 H 0.08 1.09 8.14 -2.39 -0.02 1.07 16 35 H 0.09 1.61 8.14 -2.39 -0.02 1.59 16 36 H 0.05 1.28 8.14 -2.38 -0.02 1.26 16 37 H 0.08 2.00 8.14 -2.39 -0.02 1.98 16 38 H 0.07 2.26 6.92 -2.38 -0.02 2.25 16 39 H 0.02 0.89 7.61 -2.39 -0.02 0.87 16 40 H 0.03 1.47 8.11 -2.39 -0.02 1.45 16 41 H 0.27 14.60 8.31 -92.71 -0.77 13.83 16 42 H 0.08 2.98 8.11 -2.38 -0.02 2.96 16 43 H 0.08 2.75 5.29 -2.39 -0.01 2.74 16 44 H 0.04 1.12 6.44 -2.38 -0.02 1.11 16 45 H 0.08 2.30 8.04 -2.39 -0.02 2.28 16 46 H 0.04 0.98 8.14 -2.39 -0.02 0.96 16 47 H 0.09 2.03 6.38 -2.39 -0.02 2.01 16 48 H 0.06 1.17 8.14 -2.39 -0.02 1.15 16 49 H 0.12 1.77 8.14 -2.38 -0.02 1.75 16 50 H 0.06 1.08 8.14 -2.39 -0.02 1.06 16 51 H 0.12 1.57 8.14 -2.39 -0.02 1.55 16 52 H 0.09 1.76 8.09 -2.38 -0.02 1.74 16 53 H 0.04 0.87 8.14 -2.39 -0.02 0.85 16 54 H 0.08 1.99 6.91 -2.39 -0.02 1.97 16 55 H 0.08 1.61 7.50 -2.39 -0.02 1.60 16 Total: -1.00 -71.70 431.11 -4.19 -75.89 By element: Atomic # 1 Polarization: 19.14 SS G_CDS: 0.85 Total: 19.98 kcal Atomic # 6 Polarization: -9.75 SS G_CDS: 5.99 Total: -3.76 kcal Atomic # 7 Polarization: -139.32 SS G_CDS: -7.14 Total: -146.46 kcal Atomic # 8 Polarization: -100.89 SS G_CDS: -5.58 Total: -106.47 kcal Atomic # 14 Polarization: 45.00 SS G_CDS: 2.03 Total: 47.03 kcal Atomic # 16 Polarization: 114.13 SS G_CDS: -0.34 Total: 113.79 kcal Total: -71.70 -4.19 -75.89 kcal The number of atoms in the molecule is 55 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. ZINC000069414919.mol2 55 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 -68.614 kcal (2) G-P(sol) polarization free energy of solvation -71.698 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -140.312 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -4.193 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -75.890 kcal (6) G-S(sol) free energy of system = (1) + (5) -144.505 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 1.57 seconds