Wall clock time and date at job start Sat Apr 11 2020 08:05:41 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 N 2 2 C 1.31619 * 1 3 3 Si 1.86800 * 120.00512 * 2 1 4 4 H 1.48504 * 109.46807 * 0.02562 * 3 2 1 5 5 H 1.48503 * 109.46858 * 119.99986 * 3 2 1 6 6 H 1.48497 * 109.47473 * 240.00373 * 3 2 1 7 7 C 1.38821 * 119.99567 * 180.02562 * 2 1 3 8 8 H 1.08000 * 119.99812 * 179.97438 * 7 2 1 9 9 N 1.36935 * 119.99924 * 359.97438 * 7 2 1 10 10 C 1.46494 * 119.99625 * 180.02562 * 9 7 2 11 11 C 1.53003 * 109.47244 * 180.02562 * 10 9 7 12 12 H 1.08999 * 110.43254 * 307.54562 * 11 10 9 13 13 C 1.54890 * 110.48713 * 70.22197 * 11 10 9 14 14 C 1.54883 * 102.74988 * 156.62569 * 13 11 10 15 15 C 1.54260 * 104.19577 * 322.05531 * 14 13 11 16 16 H 1.09000 * 110.07264 * 142.92011 * 15 14 13 17 17 N 1.46503 * 110.03463 * 264.32649 * 15 14 13 18 18 C 1.34776 * 120.00058 * 272.16767 * 17 15 14 19 19 O 1.21680 * 120.00015 * 354.97762 * 18 17 15 20 20 C 1.46764 * 119.99872 * 174.98564 * 18 17 15 21 21 C 1.36693 * 126.87981 * 4.99327 * 20 18 17 22 22 N 1.33316 * 107.78402 * 179.69356 * 21 20 18 23 23 C 1.30948 * 109.76193 * 0.16317 * 22 21 20 24 24 N 1.34541 * 108.94654 * 0.33406 * 23 22 21 25 25 C 1.46470 * 126.52607 * 178.86613 * 24 23 22 26 26 C 1.53040 * 109.58048 * 28.20346 * 25 24 23 27 27 C 1.52825 * 109.60031 * 270.60906 * 26 25 24 28 28 C 1.52578 * 110.30143 * 61.24480 * 27 26 25 29 29 C 1.50940 * 125.85617 * 180.74484 * 23 22 21 30 30 C 1.53876 * 106.60100 * 23.61242 * 15 14 13 31 31 H 0.97000 * 120.00118 * 179.97438 * 1 2 3 32 32 H 0.97000 * 120.00150 * 359.97438 * 9 7 2 33 33 H 1.09005 * 109.47173 * 299.99420 * 10 9 7 34 34 H 1.09000 * 109.48078 * 60.00029 * 10 9 7 35 35 H 1.09006 * 110.75604 * 274.94171 * 13 11 10 36 36 H 1.09000 * 110.75366 * 38.30707 * 13 11 10 37 37 H 1.09008 * 110.48366 * 203.37927 * 14 13 11 38 38 H 1.08993 * 110.60341 * 80.79240 * 14 13 11 39 39 H 0.97005 * 119.99585 * 92.16744 * 17 15 14 40 40 H 1.07993 * 126.10830 * 359.84237 * 21 20 18 41 41 H 1.09003 * 109.45421 * 148.23506 * 25 24 23 42 42 H 1.09004 * 109.45597 * 268.19464 * 25 24 23 43 43 H 1.09000 * 109.44271 * 30.64492 * 26 25 24 44 44 H 1.08998 * 109.44925 * 150.56286 * 26 25 24 45 45 H 1.09004 * 109.32658 * 181.49637 * 27 26 25 46 46 H 1.09004 * 109.33302 * 300.98525 * 27 26 25 47 47 H 1.09002 * 109.45086 * 153.43311 * 28 27 26 48 48 H 1.08998 * 109.45642 * 273.37327 * 28 27 26 49 49 H 1.09001 * 109.50616 * 106.63759 * 29 23 22 50 50 H 1.09005 * 109.50606 * 346.50922 * 29 23 22 51 51 H 1.08998 * 110.03341 * 240.72116 * 30 15 14 52 52 H 1.08991 * 110.03665 * 119.28036 * 30 15 14 Note: An asterisk (*) indicates this parameter was or will be optimized. Cartesian coordinates (angstroms) NO. Atom X Y Z 1 7 0.0000 0.0000 0.0000 2 6 1.3162 0.0000 0.0000 3 14 2.2503 1.6176 0.0000 4 1 1.2853 2.7464 0.0006 5 1 3.1041 1.6962 1.2125 6 1 3.1040 1.6964 -1.2125 7 6 2.0102 -1.2023 -0.0005 8 1 3.0902 -1.2023 -0.0010 9 7 1.3254 -2.3881 -0.0005 10 6 2.0579 -3.6568 -0.0005 11 6 1.0636 -4.8197 -0.0012 12 1 0.3429 -4.7047 0.8084 13 6 0.3387 -4.9124 -1.3668 14 6 -0.1120 -6.3935 -1.4147 15 6 1.0593 -7.1663 -0.7741 16 1 0.6786 -7.9938 -0.1755 17 7 1.9564 -7.6722 -1.8161 18 6 1.7228 -8.8731 -2.3816 19 8 0.8222 -9.5771 -1.9646 20 6 2.5548 -9.3317 -3.5002 21 6 3.6546 -8.7045 -4.0156 22 7 4.1196 -9.4540 -5.0153 23 6 3.3686 -10.5171 -5.1580 24 7 2.3799 -10.4792 -4.2463 25 6 1.3091 -11.4646 -4.0800 26 6 1.7975 -12.8368 -4.5497 27 6 1.5036 -13.0030 -6.0402 28 6 2.2416 -11.9389 -6.8471 29 6 3.5762 -11.6168 -6.1710 30 6 1.8068 -6.1657 0.1247 31 1 -0.4850 -0.8400 -0.0004 32 1 0.3554 -2.3880 0.0002 33 1 2.6845 -3.7146 -0.8906 34 1 2.6846 -3.7147 0.8894 35 1 -0.5230 -4.2454 -1.3928 36 1 1.0249 -4.6908 -2.1842 37 1 -0.2616 -6.7135 -2.4460 38 1 -1.0246 -6.5356 -0.8361 39 1 2.7184 -7.1428 -2.0989 40 1 4.0735 -7.7701 -3.6725 41 1 1.0269 -11.5201 -3.0286 42 1 0.4447 -11.1650 -4.6726 43 1 2.8712 -12.9174 -4.3803 44 1 1.2824 -13.6168 -3.9890 45 1 1.8289 -13.9916 -6.3641 46 1 0.4312 -12.9052 -6.2097 47 1 2.4257 -12.3106 -7.8552 48 1 1.6335 -11.0358 -6.8989 49 1 3.9542 -12.5074 -5.6690 50 1 4.2949 -11.2888 -6.9220 51 1 2.8370 -6.0564 -0.2144 52 1 1.7881 -6.5071 1.1596 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 ZINC001284193492.mol2 52 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 08:05:41 Heat of formation + Delta-G solvation = 15.765272 kcal Electronic energy + Delta-G solvation = -30376.717850 eV Core-core repulsion = 26376.273365 eV Total energy + Delta-G solvation = -4000.444484 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 346.211 amu Computer time = 0.84 seconds Orbital eigenvalues (eV) -42.77973 -39.95689 -38.04589 -37.75851 -35.06719 -34.10357 -33.56307 -31.47906 -31.05865 -29.92713 -28.78183 -27.78285 -26.37426 -25.01599 -24.11600 -23.19894 -22.40465 -21.16448 -20.53522 -20.28991 -19.91351 -19.56225 -17.97800 -17.20478 -16.79537 -16.39534 -15.99462 -15.79437 -15.61620 -15.22095 -14.90477 -14.66104 -14.35853 -14.23980 -13.75610 -13.68582 -13.42757 -13.33516 -13.25617 -13.19840 -13.14803 -12.47698 -12.29903 -12.21944 -11.74500 -11.54525 -11.48527 -11.36316 -11.13088 -10.96651 -10.83949 -10.71822 -10.56411 -10.52190 -10.32826 -10.26781 -10.05194 -9.95901 -9.95589 -9.25248 -9.13829 -8.85270 -8.72134 -6.97133 -6.08174 -3.07180 1.03255 2.13793 2.51359 3.06809 3.13799 3.52960 3.56688 3.74102 3.82382 4.01802 4.10019 4.21398 4.40769 4.53958 4.60978 4.66512 4.67411 4.73917 4.74478 4.82155 4.93134 4.97951 5.04670 5.17255 5.23769 5.27455 5.37706 5.41135 5.46808 5.50569 5.55260 5.58065 5.60673 5.67012 5.69713 5.75902 5.82368 5.87288 5.98581 6.03388 6.08328 6.20185 6.22394 6.41578 6.47883 6.49252 6.72774 6.73221 6.84964 7.26769 7.63022 7.82879 7.96296 8.78399 9.26380 10.12757 10.28096 11.40544 Molecular weight = 346.21amu Principal moments of inertia in cm(-1) A = 0.021182 B = 0.001883 C = 0.001804 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1321.537776 B =14867.241353 C =15517.470437 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 N -0.945 5.945 2 C -0.047 4.047 3 Si 1.080 2.920 4 H -0.285 1.285 5 H -0.296 1.296 6 H -0.295 1.295 7 C -0.330 4.330 8 H 0.063 0.937 9 N -0.743 5.743 10 C 0.166 3.834 11 C -0.099 4.099 12 H 0.076 0.924 13 C -0.112 4.112 14 C -0.133 4.133 15 C 0.144 3.856 16 H 0.091 0.909 17 N -0.706 5.706 18 C 0.596 3.404 19 O -0.550 6.550 20 C -0.090 4.090 21 C 0.041 3.959 22 N -0.493 5.493 23 C 0.231 3.769 24 N -0.416 5.416 25 C 0.098 3.902 26 C -0.141 4.141 27 C -0.125 4.125 28 C -0.125 4.125 29 C -0.039 4.039 30 C -0.122 4.122 31 H 0.254 0.746 32 H 0.367 0.633 33 H 0.019 0.981 34 H 0.018 0.982 35 H 0.069 0.931 36 H 0.067 0.933 37 H 0.064 0.936 38 H 0.073 0.927 39 H 0.403 0.597 40 H 0.179 0.821 41 H 0.111 0.889 42 H 0.086 0.914 43 H 0.080 0.920 44 H 0.088 0.912 45 H 0.072 0.928 46 H 0.069 0.931 47 H 0.080 0.920 48 H 0.066 0.934 49 H 0.091 0.909 50 H 0.100 0.900 51 H 0.074 0.926 52 H 0.075 0.925 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges 4.263 -30.170 -11.299 32.497 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 N -0.590 5.590 2 C -0.244 4.244 3 Si 0.911 3.089 4 H -0.211 1.211 5 H -0.223 1.223 6 H -0.223 1.223 7 C -0.462 4.462 8 H 0.081 0.919 9 N -0.388 5.388 10 C 0.039 3.961 11 C -0.118 4.118 12 H 0.094 0.906 13 C -0.149 4.149 14 C -0.172 4.172 15 C 0.040 3.960 16 H 0.109 0.891 17 N -0.357 5.357 18 C 0.383 3.617 19 O -0.429 6.429 20 C -0.207 4.207 21 C -0.114 4.114 22 N -0.211 5.211 23 C -0.031 4.031 24 N -0.097 5.097 25 C -0.024 4.024 26 C -0.179 4.179 27 C -0.163 4.163 28 C -0.163 4.163 29 C -0.077 4.077 30 C -0.160 4.160 31 H 0.065 0.935 32 H 0.200 0.800 33 H 0.037 0.963 34 H 0.035 0.965 35 H 0.087 0.913 36 H 0.086 0.914 37 H 0.083 0.917 38 H 0.092 0.908 39 H 0.239 0.761 40 H 0.196 0.804 41 H 0.129 0.871 42 H 0.104 0.896 43 H 0.098 0.902 44 H 0.106 0.894 45 H 0.091 0.909 46 H 0.088 0.912 47 H 0.099 0.901 48 H 0.085 0.915 49 H 0.109 0.891 50 H 0.118 0.882 51 H 0.093 0.907 52 H 0.093 0.907 Dipole moment (debyes) X Y Z Total from point charges 4.220 -28.945 -11.435 31.406 hybrid contribution -0.411 -1.456 0.412 1.568 sum 3.809 -30.401 -11.022 32.561 Atomic orbital electron populations 1.70882 1.06018 1.28356 1.53778 1.25775 0.97084 1.00996 1.00586 0.83241 0.74205 0.75627 0.75839 1.21050 1.22307 1.22284 1.20035 0.91997 0.85916 1.48208 0.91853 1.42350 1.04871 1.00931 1.90673 1.20623 0.92928 0.84858 0.97695 1.22201 0.97946 0.93850 0.97844 0.90573 1.22502 1.00385 0.94770 0.97270 1.22798 0.97517 0.96012 1.00847 1.21702 0.89855 0.96542 0.87886 0.89067 1.45876 1.30948 1.18733 1.40115 1.16762 0.82543 0.81507 0.80904 1.90767 1.33101 1.55130 1.63938 1.20730 1.04159 0.93397 1.02405 1.22676 0.93972 1.00189 0.94590 1.70114 1.28094 1.03873 1.19040 1.23461 0.87579 0.97846 0.94195 1.45243 1.22283 1.17726 1.24404 1.22218 0.88203 0.86754 1.05213 1.22049 1.03087 0.95646 0.97082 1.21635 1.01074 0.99559 0.94001 1.21613 0.95457 0.99576 0.99677 1.20280 0.99056 0.93554 0.94858 1.22448 0.99702 0.94418 0.99479 0.93451 0.80012 0.96297 0.96452 0.91252 0.91378 0.91694 0.90805 0.76138 0.80374 0.87102 0.89582 0.90158 0.89390 0.90912 0.91185 0.90129 0.91540 0.89078 0.88183 0.90737 0.90677 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 N -0.94 -29.47 13.70 55.49 0.76 -28.71 16 2 C -0.05 -1.38 5.50 -17.43 -0.10 -1.48 16 3 Si 1.08 26.17 29.92 -169.99 -5.09 21.09 16 4 H -0.29 -7.00 7.11 56.52 0.40 -6.60 16 5 H -0.30 -6.84 7.11 56.52 0.40 -6.44 16 6 H -0.30 -6.83 7.11 56.52 0.40 -6.43 16 7 C -0.33 -9.44 9.99 -15.06 -0.15 -9.59 16 8 H 0.06 1.78 7.83 -52.49 -0.41 1.37 16 9 N -0.74 -18.74 5.49 -59.91 -0.33 -19.06 16 10 C 0.17 3.29 5.54 -4.04 -0.02 3.27 16 11 C -0.10 -1.52 2.89 -88.96 -0.26 -1.78 16 12 H 0.08 1.22 8.14 -51.93 -0.42 0.80 16 13 C -0.11 -1.65 6.19 -24.74 -0.15 -1.81 16 14 C -0.13 -1.69 6.54 -25.08 -0.16 -1.85 16 15 C 0.14 1.69 3.29 -66.81 -0.22 1.47 16 16 H 0.09 1.13 7.50 -51.93 -0.39 0.74 16 17 N -0.71 -7.71 5.02 -54.00 -0.27 -7.98 16 18 C 0.60 7.43 7.78 -12.82 -0.10 7.33 16 19 O -0.55 -8.13 14.49 5.21 0.08 -8.06 16 20 C -0.09 -1.05 6.90 -82.21 -0.57 -1.62 16 21 C 0.04 0.46 11.37 -17.47 -0.20 0.26 16 22 N -0.49 -5.95 11.20 -10.47 -0.12 -6.07 16 23 C 0.23 2.32 6.83 -155.38 -1.06 1.26 16 24 N -0.42 -4.30 3.10 -109.85 -0.34 -4.64 16 25 C 0.10 0.80 5.93 -4.04 -0.02 0.77 16 26 C -0.14 -0.72 5.56 -26.80 -0.15 -0.87 16 27 C -0.13 -0.49 5.68 -27.04 -0.15 -0.64 16 28 C -0.12 -0.61 5.67 -26.92 -0.15 -0.76 16 29 C -0.04 -0.24 5.54 -27.74 -0.15 -0.39 16 30 C -0.12 -1.46 6.14 -25.61 -0.16 -1.61 16 31 H 0.25 7.80 6.77 -40.82 -0.28 7.52 16 32 H 0.37 9.44 6.47 -40.82 -0.26 9.18 16 33 H 0.02 0.38 8.02 -51.93 -0.42 -0.04 16 34 H 0.02 0.36 8.14 -51.93 -0.42 -0.07 16 35 H 0.07 1.13 8.14 -51.93 -0.42 0.70 16 36 H 0.07 1.05 7.96 -51.93 -0.41 0.64 16 37 H 0.06 0.85 8.04 -51.92 -0.42 0.43 16 38 H 0.07 0.90 8.14 -51.93 -0.42 0.48 16 39 H 0.40 3.70 7.27 -40.82 -0.30 3.40 16 40 H 0.18 1.53 7.47 -52.49 -0.39 1.14 16 41 H 0.11 1.08 6.45 -51.93 -0.33 0.74 16 42 H 0.09 0.68 7.81 -51.93 -0.41 0.27 16 43 H 0.08 0.44 5.68 -51.93 -0.30 0.15 16 44 H 0.09 0.34 8.14 -51.93 -0.42 -0.08 16 45 H 0.07 0.20 8.14 -51.93 -0.42 -0.23 16 46 H 0.07 0.26 8.09 -51.93 -0.42 -0.16 16 47 H 0.08 0.27 8.14 -51.93 -0.42 -0.15 16 48 H 0.07 0.44 7.84 -51.93 -0.41 0.03 16 49 H 0.09 0.44 6.30 -51.93 -0.33 0.11 16 50 H 0.10 0.58 8.14 -51.93 -0.42 0.15 16 51 H 0.07 0.84 7.31 -51.93 -0.38 0.46 16 52 H 0.07 0.83 8.14 -51.93 -0.42 0.41 16 LS Contribution 401.67 15.07 6.05 6.05 Total: -1.00 -35.40 401.67 -11.48 -46.88 By element: Atomic # 1 Polarization: 16.99 SS G_CDS: -8.45 Total: 8.54 kcal Atomic # 6 Polarization: -4.26 SS G_CDS: -3.78 Total: -8.04 kcal Atomic # 7 Polarization: -66.17 SS G_CDS: -0.30 Total: -66.46 kcal Atomic # 8 Polarization: -8.13 SS G_CDS: 0.08 Total: -8.06 kcal Atomic # 14 Polarization: 26.17 SS G_CDS: -5.09 Total: 21.09 kcal Total LS contribution 6.05 Total: 6.05 kcal Total: -35.40 -11.48 -46.88 kcal The number of atoms in the molecule is 52 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. ZINC001284193492.mol2 52 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 62.643 kcal (2) G-P(sol) polarization free energy of solvation -35.397 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system 27.247 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -11.481 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -46.878 kcal (6) G-S(sol) free energy of system = (1) + (5) 15.765 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.84 seconds