Wall clock time and date at job start Tue Mar 31 2020 13:40:43 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 1.53002 * 1 3 3 C 1.52992 * 109.47112 * 2 1 4 4 C 1.52997 * 109.47148 * 120.00172 * 2 1 3 5 5 N 1.46896 * 109.47347 * 64.99827 * 4 2 1 6 6 C 1.47843 * 111.00357 * 75.25217 * 5 4 2 7 7 C 1.54907 * 104.79739 * 146.36147 * 6 5 4 8 8 C 1.55391 * 101.74670 * 323.02228 * 7 6 5 9 9 C 1.47443 * 111.00287 * 196.09942 * 5 4 2 10 10 H 1.08991 * 109.89297 * 117.17369 * 9 5 4 11 11 C 1.50696 * 109.88887 * 356.14446 * 9 5 4 12 12 O 1.21283 * 120.00193 * 311.65791 * 11 9 5 13 13 N 1.34774 * 120.00242 * 131.65048 * 11 9 5 14 14 C 1.46501 * 119.99679 * 3.31793 * 13 11 9 15 15 C 1.46502 * 120.00497 * 183.31831 * 13 11 9 16 16 H 1.09007 * 110.88099 * 356.29983 * 15 13 11 17 17 C 1.55150 * 111.00361 * 232.38050 * 15 13 11 18 18 C 1.54324 * 102.94007 * 277.42341 * 17 15 13 19 19 N 1.47287 * 107.30808 * 337.81936 * 18 17 15 20 20 C 1.36940 * 125.79595 * 178.92691 * 19 18 17 21 21 H 1.08000 * 119.99860 * 179.97438 * 20 19 18 22 22 C 1.38806 * 119.99698 * 359.97438 * 20 19 18 23 23 N 1.31619 * 120.00355 * 359.97438 * 22 20 19 24 24 Si 1.86800 * 120.00008 * 180.02562 * 22 20 19 25 25 H 1.48498 * 109.47140 * 59.99713 * 24 22 20 26 26 H 1.48499 * 109.47401 * 179.97438 * 24 22 20 27 27 H 1.48501 * 109.47175 * 299.99733 * 24 22 20 28 28 C 1.47425 * 108.55998 * 358.92371 * 19 18 17 29 29 H 1.09001 * 109.46952 * 299.99895 * 1 2 3 30 30 H 1.09005 * 109.47032 * 60.00356 * 1 2 3 31 31 H 1.09002 * 109.46947 * 179.97438 * 1 2 3 32 32 H 1.08998 * 109.47089 * 239.99587 * 2 1 3 33 33 H 1.09009 * 109.47395 * 180.02562 * 3 2 1 34 34 H 1.09003 * 109.47390 * 299.99705 * 3 2 1 35 35 H 1.08998 * 109.47480 * 59.99826 * 3 2 1 36 36 H 1.09004 * 109.47248 * 305.00190 * 4 2 1 37 37 H 1.09001 * 109.47312 * 185.00093 * 4 2 1 38 38 H 1.08998 * 110.37715 * 265.20191 * 6 5 4 39 39 H 1.09002 * 110.36779 * 27.53791 * 6 5 4 40 40 H 1.09001 * 110.98656 * 81.03147 * 7 6 5 41 41 H 1.09001 * 110.98707 * 204.83760 * 7 6 5 42 42 H 1.08996 * 110.67665 * 277.17884 * 8 7 6 43 43 H 1.08996 * 110.84760 * 153.85833 * 8 7 6 44 44 H 1.09009 * 109.47061 * 204.43764 * 14 13 11 45 45 H 1.08997 * 109.47387 * 324.43910 * 14 13 11 46 46 H 1.09005 * 109.47054 * 84.44302 * 14 13 11 47 47 H 1.08994 * 110.72591 * 35.79036 * 17 15 13 48 48 H 1.09008 * 110.71865 * 159.06524 * 17 15 13 49 49 H 1.09000 * 109.88254 * 97.23061 * 18 17 15 50 50 H 1.09007 * 109.88201 * 218.23669 * 18 17 15 51 51 H 0.96998 * 120.00185 * 179.97438 * 23 22 20 52 52 H 1.08997 * 110.36878 * 265.26573 * 28 19 18 53 53 H 1.08993 * 110.37319 * 143.04546 * 28 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 6 2.0400 1.4424 0.0000 4 6 2.0400 -0.7213 1.2492 5 7 1.6514 -2.1367 1.1904 6 6 2.4946 -2.8782 0.2287 7 6 2.6330 -4.2967 0.8355 8 6 2.7228 -3.9834 2.3549 9 6 1.7767 -2.7745 2.5138 10 1 0.7988 -3.1117 2.8571 11 6 2.3572 -1.7958 3.5017 12 8 3.3481 -1.1586 3.2134 13 7 1.7751 -1.6282 4.7057 14 6 0.6218 -2.4494 5.0823 15 6 2.2955 -0.6249 5.6378 16 1 3.1894 -0.1478 5.2358 17 6 2.5764 -1.2513 7.0292 18 6 1.1871 -1.2386 7.7008 19 7 0.3811 -0.2104 7.0207 20 6 -0.9218 0.1025 7.3033 21 1 -1.4248 0.8771 6.7434 22 6 -1.5960 -0.5758 8.3093 23 7 -0.9831 -1.5201 8.9914 24 14 -3.3734 -0.1495 8.6944 25 1 -4.2090 -0.3746 7.4877 26 1 -3.8607 -1.0114 9.8011 27 1 -3.4638 1.2762 9.1002 28 6 1.2121 0.4271 5.9832 29 1 -0.3633 0.5138 0.8900 30 1 -0.3633 0.5138 -0.8901 31 1 -0.3633 -1.0277 -0.0005 32 1 1.8933 -0.5139 -0.8899 33 1 3.1301 1.4425 -0.0005 34 1 1.6767 1.9563 -0.8900 35 1 1.6767 1.9563 0.8899 36 1 1.6054 -0.2618 2.1370 37 1 3.1263 -0.6444 1.2951 38 1 2.0064 -2.9277 -0.7446 39 1 3.4732 -2.4064 0.1397 40 1 1.7544 -4.9030 0.6152 41 1 3.5412 -4.7854 0.4826 42 1 3.7419 -3.7143 2.6328 43 1 2.3711 -4.8284 2.9467 44 1 0.0328 -1.9253 5.8351 45 1 0.0051 -2.6349 4.2029 46 1 0.9693 -3.3990 5.4893 47 1 2.9453 -2.2717 6.9255 48 1 3.2823 -0.6403 7.5918 49 1 0.7129 -2.2138 7.5902 50 1 1.2886 -0.9937 8.7581 51 1 -1.4541 -1.9938 9.6946 52 1 1.6746 1.3342 6.3720 53 1 0.6112 0.6556 5.1031 RHF calculation, no. of doubly occupied orbitals= 63 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 ZINC001033217005.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 13:40:43 Heat of formation + Delta-G solvation = 9.925355 kcal Electronic energy + Delta-G solvation = -30234.076688 eV Core-core repulsion = 26527.945680 eV Total energy + Delta-G solvation = -3706.131009 eV No. of doubly occupied orbitals = 63 Molecular weight (most abundant/longest-lived isotopes) = 323.231 amu Computer time = 0.87 seconds Orbital eigenvalues (eV) -40.79211 -38.59906 -36.95969 -35.64519 -34.27305 -32.23037 -31.12241 -29.78652 -29.00377 -27.87590 -27.02706 -25.88310 -25.31467 -24.41127 -22.57046 -21.62249 -20.12779 -20.07609 -19.74559 -18.38109 -17.34765 -16.97166 -16.13562 -15.74381 -15.28857 -15.00855 -14.83640 -14.67811 -13.93622 -13.87236 -13.77549 -13.49008 -13.31177 -12.99143 -12.66353 -12.45131 -12.17879 -12.05828 -11.98945 -11.82291 -11.76637 -11.70760 -11.51850 -11.45340 -11.19446 -10.98458 -10.93187 -10.85627 -10.84323 -10.77376 -10.57237 -10.36378 -10.19586 -10.16739 -9.95937 -9.70048 -9.52345 -8.71547 -8.27709 -8.07466 -6.87246 -5.78265 -3.12485 2.74529 3.33908 3.37349 3.42488 3.42767 3.97419 4.44173 4.45152 4.59248 4.72876 4.95115 5.00824 5.06926 5.23800 5.28064 5.35214 5.37654 5.42191 5.46620 5.63263 5.64062 5.66536 5.68915 5.71084 5.74563 5.76694 5.80503 5.85551 5.91094 5.92470 5.99931 6.05715 6.09721 6.14714 6.17474 6.24299 6.32703 6.39127 6.45512 6.50426 6.51221 6.61462 6.76136 6.90910 7.02593 7.08775 7.49389 7.52470 7.74756 7.82464 8.16680 8.43978 9.14513 9.74074 10.39768 11.32873 Molecular weight = 323.23amu Principal moments of inertia in cm(-1) A = 0.014141 B = 0.003854 C = 0.003572 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1979.592028 B = 7263.572017 C = 7836.676735 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.138 4.138 2 C -0.092 4.092 3 C -0.145 4.145 4 C 0.051 3.949 5 N -0.504 5.504 6 C 0.041 3.959 7 C -0.126 4.126 8 C -0.126 4.126 9 C 0.048 3.952 10 H 0.109 0.891 11 C 0.501 3.499 12 O -0.556 6.556 13 N -0.581 5.581 14 C 0.053 3.947 15 C 0.121 3.879 16 H 0.098 0.902 17 C -0.154 4.154 18 C 0.172 3.828 19 N -0.602 5.602 20 C -0.231 4.231 21 H 0.077 0.923 22 C -0.004 4.004 23 N -0.921 5.921 24 Si 0.911 3.089 25 H -0.285 1.285 26 H -0.290 1.290 27 H -0.286 1.286 28 C 0.126 3.874 29 H 0.050 0.950 30 H 0.043 0.957 31 H 0.064 0.936 32 H 0.063 0.937 33 H 0.051 0.949 34 H 0.052 0.948 35 H 0.055 0.945 36 H 0.070 0.930 37 H 0.065 0.935 38 H 0.080 0.920 39 H 0.049 0.951 40 H 0.077 0.923 41 H 0.074 0.926 42 H 0.073 0.927 43 H 0.080 0.920 44 H 0.130 0.870 45 H 0.059 0.941 46 H 0.047 0.953 47 H 0.062 0.938 48 H 0.067 0.933 49 H 0.052 0.948 50 H 0.043 0.957 51 H 0.253 0.747 52 H 0.029 0.971 53 H 0.042 0.958 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges 6.876 -4.034 -15.931 17.814 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 -0.195 4.195 2 C -0.111 4.111 3 C -0.203 4.203 4 C -0.077 4.077 5 N -0.228 5.228 6 C -0.087 4.087 7 C -0.164 4.164 8 C -0.165 4.165 9 C -0.063 4.063 10 H 0.126 0.874 11 C 0.289 3.711 12 O -0.435 6.435 13 N -0.312 5.312 14 C -0.089 4.089 15 C 0.017 3.983 16 H 0.116 0.884 17 C -0.193 4.193 18 C 0.048 3.952 19 N -0.329 5.329 20 C -0.359 4.359 21 H 0.095 0.905 22 C -0.201 4.201 23 N -0.568 5.568 24 Si 0.741 3.259 25 H -0.211 1.211 26 H -0.216 1.216 27 H -0.212 1.212 28 C -0.001 4.001 29 H 0.069 0.931 30 H 0.062 0.938 31 H 0.083 0.917 32 H 0.082 0.918 33 H 0.070 0.930 34 H 0.072 0.928 35 H 0.074 0.926 36 H 0.089 0.911 37 H 0.083 0.917 38 H 0.098 0.902 39 H 0.067 0.933 40 H 0.095 0.905 41 H 0.093 0.907 42 H 0.092 0.908 43 H 0.098 0.902 44 H 0.148 0.852 45 H 0.078 0.922 46 H 0.065 0.935 47 H 0.081 0.919 48 H 0.086 0.914 49 H 0.070 0.930 50 H 0.061 0.939 51 H 0.064 0.936 52 H 0.047 0.953 53 H 0.061 0.939 Dipole moment (debyes) X Y Z Total from point charges 6.679 -3.779 -16.043 17.784 hybrid contribution -0.205 0.256 0.728 0.798 sum 6.474 -3.523 -15.315 16.996 Atomic orbital electron populations 1.21731 0.94809 1.02309 1.00698 1.21127 0.96534 0.95452 0.97965 1.21795 1.00767 0.96123 1.01646 1.22746 1.00057 0.87153 0.97733 1.63979 1.51795 1.02912 1.04110 1.23125 0.95845 0.93154 0.96562 1.22730 1.02265 0.96937 0.94458 1.22742 0.99716 0.96784 0.97250 1.22755 1.00727 0.93689 0.89126 0.87367 1.20968 0.83839 0.83651 0.82691 1.90638 1.26373 1.49474 1.77054 1.47783 1.31396 1.36967 1.15005 1.22426 0.88296 0.95438 1.02783 1.22252 0.97338 0.89536 0.89162 0.88448 1.23218 1.00636 1.00112 0.95384 1.21306 0.85502 0.93382 0.95009 1.44633 1.09544 1.40757 1.37960 1.18993 0.85698 1.16365 1.14875 0.90499 1.24768 0.98389 0.98544 0.98370 1.69943 1.35778 1.26004 1.25080 0.86224 0.84432 0.77602 0.77652 1.21111 1.21603 1.21215 1.21899 0.92036 0.93629 0.92574 0.93093 0.93788 0.91654 0.91811 0.92954 0.92842 0.92592 0.91115 0.91686 0.90160 0.93300 0.90476 0.90739 0.90786 0.90158 0.85182 0.92241 0.93451 0.91909 0.91404 0.92958 0.93926 0.93626 0.95313 0.93924 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 -0.14 -1.62 9.08 37.16 0.34 -1.29 16 2 C -0.09 -1.09 2.97 -90.62 -0.27 -1.36 16 3 C -0.15 -1.62 9.19 37.15 0.34 -1.28 16 4 C 0.05 0.71 2.77 -3.83 -0.01 0.70 16 5 N -0.50 -6.52 4.57 -224.73 -1.03 -7.55 16 6 C 0.04 0.44 6.02 -2.30 -0.01 0.43 16 7 C -0.13 -1.18 7.08 -24.46 -0.17 -1.35 16 8 C -0.13 -1.43 6.48 -24.77 -0.16 -1.59 16 9 C 0.05 0.65 3.47 -67.87 -0.24 0.41 16 10 H 0.11 1.44 5.47 -51.93 -0.28 1.16 16 11 C 0.50 8.20 4.77 -10.99 -0.05 8.15 16 12 O -0.56 -10.25 13.06 5.55 0.07 -10.18 16 13 N -0.58 -9.98 2.91 -171.47 -0.50 -10.48 16 14 C 0.05 0.90 8.55 59.85 0.51 1.41 16 15 C 0.12 2.23 3.67 -65.78 -0.24 1.98 16 16 H 0.10 1.78 7.02 -51.92 -0.36 1.42 16 17 C -0.15 -2.85 6.36 -24.90 -0.16 -3.01 16 18 C 0.17 3.92 4.27 -2.92 -0.01 3.90 16 19 N -0.60 -14.36 1.99 -169.86 -0.34 -14.70 16 20 C -0.23 -6.09 10.04 -15.06 -0.15 -6.24 16 21 H 0.08 1.99 7.83 -52.49 -0.41 1.58 16 22 C 0.00 -0.11 5.49 -17.43 -0.10 -0.21 16 23 N -0.92 -25.52 10.33 55.49 0.57 -24.95 16 24 Si 0.91 21.31 29.55 -169.99 -5.02 16.29 16 25 H -0.28 -6.57 7.11 56.52 0.40 -6.17 16 26 H -0.29 -6.88 7.11 56.52 0.40 -6.48 16 27 H -0.29 -6.69 7.11 56.52 0.40 -6.28 16 28 C 0.13 2.58 6.63 -2.53 -0.02 2.56 16 29 H 0.05 0.65 8.14 -51.93 -0.42 0.23 16 30 H 0.04 0.46 8.14 -51.93 -0.42 0.03 16 31 H 0.06 0.80 7.75 -51.93 -0.40 0.39 16 32 H 0.06 0.71 7.60 -51.93 -0.39 0.32 16 33 H 0.05 0.57 8.14 -51.92 -0.42 0.15 16 34 H 0.05 0.52 8.14 -51.93 -0.42 0.09 16 35 H 0.05 0.67 8.14 -51.93 -0.42 0.24 16 36 H 0.07 1.18 6.45 -51.93 -0.33 0.84 16 37 H 0.07 1.03 6.05 -51.93 -0.31 0.71 16 38 H 0.08 0.77 8.14 -51.93 -0.42 0.34 16 39 H 0.05 0.56 7.52 -51.93 -0.39 0.17 16 40 H 0.08 0.66 8.14 -51.93 -0.42 0.24 16 41 H 0.07 0.60 8.14 -51.93 -0.42 0.17 16 42 H 0.07 0.94 7.79 -51.93 -0.40 0.54 16 43 H 0.08 0.81 8.14 -51.93 -0.42 0.38 16 44 H 0.13 2.75 4.21 -51.92 -0.22 2.53 16 45 H 0.06 0.90 5.96 -51.93 -0.31 0.59 16 46 H 0.05 0.75 8.14 -51.93 -0.42 0.33 16 47 H 0.06 1.10 8.14 -51.93 -0.42 0.67 16 48 H 0.07 1.18 8.14 -51.92 -0.42 0.76 16 49 H 0.05 1.27 6.05 -51.93 -0.31 0.96 16 50 H 0.04 1.10 7.52 -51.92 -0.39 0.71 16 51 H 0.25 6.92 8.31 -40.82 -0.34 6.58 16 52 H 0.03 0.59 8.14 -51.93 -0.42 0.17 16 53 H 0.04 0.89 8.14 -51.93 -0.42 0.47 16 LS Contribution 390.09 15.07 5.88 5.88 Total: -1.00 -28.28 390.09 -10.35 -38.63 By element: Atomic # 1 Polarization: 13.43 SS G_CDS: -9.59 Total: 3.84 kcal Atomic # 6 Polarization: 3.62 SS G_CDS: -0.40 Total: 3.22 kcal Atomic # 7 Polarization: -56.39 SS G_CDS: -1.29 Total: -57.68 kcal Atomic # 8 Polarization: -10.25 SS G_CDS: 0.07 Total: -10.18 kcal Atomic # 14 Polarization: 21.31 SS G_CDS: -5.02 Total: 16.29 kcal Total LS contribution 5.88 Total: 5.88 kcal Total: -28.28 -10.35 -38.63 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. ZINC001033217005.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 48.556 kcal (2) G-P(sol) polarization free energy of solvation -28.281 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system 20.276 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -10.350 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -38.631 kcal (6) G-S(sol) free energy of system = (1) + (5) 9.925 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.87 seconds