Wall clock time and date at job start Sat Apr 11 2020 06:10:28 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 1.53001 * 1 3 3 C 1.52991 * 109.47378 * 2 1 4 4 H 1.08994 * 109.50210 * 305.06348 * 3 2 1 5 5 C 1.53625 * 109.42950 * 65.28910 * 3 2 1 6 6 N 1.46930 * 108.54395 * 174.71967 * 5 3 2 7 7 C 1.34779 * 120.62972 * 126.36545 * 6 5 3 8 8 O 1.21282 * 119.99922 * 359.72776 * 7 6 5 9 9 C 1.50699 * 120.00037 * 179.72344 * 7 6 5 10 10 O 1.42905 * 109.46972 * 180.02562 * 9 7 6 11 11 C 1.42899 * 113.99778 * 180.02562 * 10 9 7 12 12 C 1.53177 * 109.54234 * 269.55191 * 11 10 9 13 13 C 1.53091 * 109.16514 * 183.15597 * 12 11 10 14 14 O 1.42902 * 109.41656 * 57.60533 * 13 12 11 15 15 C 1.42907 * 114.09785 * 298.84692 * 14 13 12 16 16 C 1.53090 * 109.41431 * 61.15874 * 15 14 13 17 17 C 1.46920 * 118.74035 * 306.09671 * 6 5 3 18 18 C 1.53195 * 108.77666 * 53.86068 * 17 6 5 19 19 C 1.53039 * 109.49874 * 184.99732 * 3 2 1 20 20 H 1.09004 * 109.44845 * 58.67397 * 19 3 2 21 21 N 1.46500 * 109.46324 * 298.70814 * 19 3 2 22 22 C 1.36936 * 120.00296 * 154.92667 * 21 19 3 23 23 H 1.07995 * 120.00154 * 0.02562 * 22 21 19 24 24 C 1.38812 * 120.00125 * 180.02562 * 22 21 19 25 25 N 1.31622 * 119.99976 * 359.97438 * 24 22 21 26 26 Si 1.86792 * 120.00292 * 180.02562 * 24 22 21 27 27 H 1.48511 * 109.47102 * 359.97438 * 26 24 22 28 28 H 1.48504 * 109.47740 * 119.99671 * 26 24 22 29 29 H 1.48501 * 109.47085 * 240.00188 * 26 24 22 30 30 H 1.09002 * 109.47582 * 179.97438 * 1 2 3 31 31 H 1.08993 * 109.47116 * 300.00241 * 1 2 3 32 32 H 1.09006 * 109.46856 * 59.99835 * 1 2 3 33 33 H 1.09000 * 109.46908 * 240.00081 * 2 1 3 34 34 H 1.08998 * 109.46531 * 120.00726 * 2 1 3 35 35 H 1.09001 * 109.74198 * 54.98616 * 5 3 2 36 36 H 1.08993 * 109.66875 * 294.41597 * 5 3 2 37 37 H 1.09000 * 109.47247 * 60.00371 * 9 7 6 38 38 H 1.09001 * 109.47358 * 299.99798 * 9 7 6 39 39 H 1.08998 * 109.54481 * 29.82309 * 11 10 9 40 40 H 1.08997 * 109.52326 * 303.06311 * 12 11 10 41 41 H 1.09007 * 109.52331 * 63.24865 * 12 11 10 42 42 H 1.09010 * 109.47873 * 297.62480 * 13 12 11 43 43 H 1.08997 * 109.48195 * 177.59448 * 13 12 11 44 44 H 1.08992 * 109.47872 * 301.17198 * 15 14 13 45 45 H 1.09005 * 109.47501 * 181.13719 * 15 14 13 46 46 H 1.08999 * 109.52031 * 182.48479 * 16 15 14 47 47 H 1.08999 * 109.57751 * 62.32554 * 16 15 14 48 48 H 1.09006 * 109.58628 * 173.64332 * 17 6 5 49 49 H 1.08999 * 109.58817 * 294.06650 * 17 6 5 50 50 H 1.08995 * 109.49921 * 65.31395 * 18 17 6 51 51 H 1.08996 * 109.49922 * 185.38483 * 18 17 6 52 52 H 0.97002 * 119.99642 * 334.93163 * 21 19 3 53 53 H 0.96997 * 120.00246 * 179.97438 * 25 24 22 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 1 1.6049 1.9822 -0.8409 5 6 1.6394 2.1261 1.3161 6 7 2.2453 3.4642 1.3508 7 6 1.4860 4.5563 1.5683 8 8 0.2900 4.4405 1.7327 9 6 2.1232 5.9214 1.6073 10 8 1.1194 6.9089 1.8510 11 6 1.6207 8.2459 1.9067 12 6 1.9997 8.5913 3.3501 13 6 2.4610 10.0497 3.4132 14 8 1.4204 10.8987 2.9250 15 6 1.0569 10.6531 1.5649 16 6 0.5390 9.2190 1.4276 17 6 3.6954 3.5885 1.1500 18 6 4.0738 2.8880 -0.1588 19 6 3.5653 1.4449 -0.1257 20 1 3.8545 0.9368 -1.0457 21 7 4.1507 0.7473 1.0218 22 6 5.3879 0.1703 0.9140 23 1 5.9322 0.2298 -0.0168 24 6 5.9424 -0.4912 2.0012 25 7 5.2792 -0.5633 3.1358 26 14 7.6303 -1.2777 1.8544 27 1 8.1621 -1.0567 0.4855 28 1 8.5495 -0.6663 2.8476 29 1 7.5211 -2.7359 2.1129 30 1 -0.3634 -1.0277 -0.0005 31 1 -0.3633 0.5138 0.8899 32 1 -0.3633 0.5139 -0.8900 33 1 1.8933 -0.5138 -0.8900 34 1 1.8932 -0.5140 0.8899 35 1 2.0008 1.5394 2.1607 36 1 0.5543 2.2149 1.3679 37 1 2.6078 6.1236 0.6521 38 1 2.8652 5.9535 2.4051 39 1 2.4988 8.3330 1.2669 40 1 1.1330 8.4551 3.9968 41 1 2.8080 7.9389 3.6806 42 1 3.3519 10.1761 2.7980 43 1 2.6914 10.3137 4.4454 44 1 1.9293 10.7874 0.9256 45 1 0.2756 11.3519 1.2657 46 1 0.3028 9.0156 0.3832 47 1 -0.3576 9.0947 2.0348 48 1 3.9672 4.6426 1.0921 49 1 4.2210 3.1187 1.9813 50 1 3.6195 3.4147 -0.9979 51 1 5.1579 2.8897 -0.2721 52 1 3.6620 0.6941 1.8580 53 1 5.6665 -1.0258 3.8954 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 ZINC001037928303.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 06:10:28 Heat of formation + Delta-G solvation = -124.932253 kcal Electronic energy + Delta-G solvation = -31204.891976 eV Core-core repulsion = 27076.512248 eV Total energy + Delta-G solvation = -4128.379728 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.220 amu Computer time = 0.83 seconds Orbital eigenvalues (eV) -40.27218 -39.73131 -38.10695 -37.11701 -34.47494 -33.77458 -32.79062 -31.73237 -31.49479 -29.61087 -29.13971 -27.61320 -24.92498 -24.32351 -23.92922 -23.71233 -23.49005 -20.86347 -20.74896 -19.71549 -18.27709 -17.66757 -17.32386 -16.54631 -16.47419 -16.40369 -16.00618 -15.47838 -15.14704 -14.92480 -14.56764 -14.40495 -14.03592 -13.93321 -13.73804 -13.68302 -13.29612 -13.17580 -12.88543 -12.79044 -12.60814 -12.48382 -12.26321 -11.77694 -11.72256 -11.59972 -11.41689 -11.20894 -11.11565 -11.01875 -10.84971 -10.79126 -10.71521 -10.33118 -10.27775 -10.17073 -10.06479 -9.82176 -9.78485 -9.59255 -9.47195 -8.97129 -8.26096 -7.02083 -5.83362 -3.11975 2.77198 2.78724 3.37673 3.44014 3.46111 3.49570 3.72615 4.37305 4.41374 4.53362 4.59330 4.63464 4.75115 4.83194 4.91095 5.05014 5.06563 5.09831 5.13491 5.25499 5.26341 5.30965 5.31536 5.43605 5.48087 5.50530 5.55220 5.65163 5.68519 5.76059 5.79314 5.80401 5.87447 5.89850 6.05200 6.13044 6.15818 6.32143 6.34960 6.38911 6.53674 6.57679 6.67165 6.72477 6.80333 6.87839 6.92628 7.00761 7.64832 7.65825 8.35028 8.37083 9.46840 10.03363 10.38424 11.38991 Molecular weight = 340.22amu Principal moments of inertia in cm(-1) A = 0.013385 B = 0.002598 C = 0.002298 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 2091.426979 B =10773.933488 C =12179.452737 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.153 4.153 2 C -0.110 4.110 3 C -0.103 4.103 4 H 0.066 0.934 5 C 0.120 3.880 6 N -0.601 5.601 7 C 0.514 3.486 8 O -0.533 6.533 9 C 0.046 3.954 10 O -0.353 6.353 11 C 0.087 3.913 12 C -0.181 4.181 13 C 0.064 3.936 14 O -0.383 6.383 15 C 0.065 3.935 16 C -0.153 4.153 17 C 0.112 3.888 18 C -0.150 4.150 19 C 0.178 3.822 20 H 0.051 0.949 21 N -0.719 5.719 22 C -0.237 4.237 23 H 0.070 0.930 24 C -0.012 4.012 25 N -0.931 5.931 26 Si 0.903 3.097 27 H -0.281 1.281 28 H -0.293 1.293 29 H -0.292 1.292 30 H 0.049 0.951 31 H 0.053 0.947 32 H 0.047 0.953 33 H 0.061 0.939 34 H 0.077 0.923 35 H 0.076 0.924 36 H 0.086 0.914 37 H 0.078 0.922 38 H 0.078 0.922 39 H 0.063 0.937 40 H 0.083 0.917 41 H 0.077 0.923 42 H 0.052 0.948 43 H 0.098 0.902 44 H 0.052 0.948 45 H 0.100 0.900 46 H 0.081 0.919 47 H 0.083 0.917 48 H 0.065 0.935 49 H 0.087 0.913 50 H 0.048 0.952 51 H 0.075 0.925 52 H 0.384 0.616 53 H 0.254 0.746 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -6.035 18.189 -4.926 19.787 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 -0.211 4.211 2 C -0.148 4.148 3 C -0.123 4.123 4 H 0.085 0.915 5 C -0.001 4.001 6 N -0.335 5.335 7 C 0.300 3.700 8 O -0.409 6.409 9 C -0.034 4.034 10 O -0.271 6.271 11 C 0.029 3.971 12 C -0.219 4.219 13 C -0.013 4.013 14 O -0.301 6.301 15 C -0.012 4.012 16 C -0.191 4.191 17 C -0.010 4.010 18 C -0.191 4.191 19 C 0.068 3.932 20 H 0.069 0.931 21 N -0.361 5.361 22 C -0.368 4.368 23 H 0.088 0.912 24 C -0.208 4.208 25 N -0.580 5.580 26 Si 0.735 3.265 27 H -0.207 1.207 28 H -0.220 1.220 29 H -0.220 1.220 30 H 0.069 0.931 31 H 0.072 0.928 32 H 0.066 0.934 33 H 0.080 0.920 34 H 0.095 0.905 35 H 0.094 0.906 36 H 0.105 0.895 37 H 0.096 0.904 38 H 0.096 0.904 39 H 0.081 0.919 40 H 0.102 0.898 41 H 0.095 0.905 42 H 0.070 0.930 43 H 0.116 0.884 44 H 0.070 0.930 45 H 0.118 0.882 46 H 0.100 0.900 47 H 0.102 0.898 48 H 0.084 0.916 49 H 0.106 0.894 50 H 0.067 0.933 51 H 0.093 0.907 52 H 0.219 0.781 53 H 0.064 0.936 Dipole moment (debyes) X Y Z Total from point charges -6.791 18.147 -4.743 19.948 hybrid contribution 1.498 -0.754 0.058 1.678 sum -5.293 17.393 -4.685 18.774 Atomic orbital electron populations 1.21856 0.96792 1.01048 1.01388 1.21415 0.94303 0.95712 1.03372 1.21827 0.97316 0.96173 0.96951 0.91547 1.21788 0.98859 0.81211 0.98289 1.48075 1.08673 1.06382 1.70325 1.20075 0.87084 0.85442 0.77364 1.90688 1.14700 1.86284 1.49254 1.22314 0.91431 0.88049 1.01631 1.88066 1.32285 1.13993 1.92799 1.22147 0.96623 0.82738 0.95587 1.22760 1.03336 0.97516 0.98280 1.22566 0.89612 0.88770 1.00318 1.87947 1.55951 1.58561 1.27687 1.22586 0.99835 0.95436 0.83364 1.22290 0.99592 0.94088 1.03122 1.21765 0.79204 0.99730 1.00329 1.22530 1.01838 0.99429 0.95320 1.20220 0.89772 0.90555 0.92667 0.93071 1.42492 1.19145 1.63919 1.10555 1.19251 0.93593 1.26909 0.97064 0.91214 1.24707 0.98562 1.01473 0.96042 1.69656 1.38069 1.47996 1.02251 0.86176 0.84251 0.78969 0.77100 1.20656 1.22002 1.21970 0.93147 0.92762 0.93384 0.92021 0.90479 0.90612 0.89527 0.90422 0.90394 0.91917 0.89803 0.90463 0.93018 0.88404 0.92992 0.88224 0.90033 0.89822 0.91614 0.89446 0.93290 0.90662 0.78082 0.93557 Number of geometries 1 Number of calculations of the screened coulomb radii 1 The total number of SCF iterations 13. 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 -2.09 9.68 37.16 0.36 -1.73 16 2 C -0.11 -1.74 5.18 -26.74 -0.14 -1.88 16 3 C -0.10 -1.64 2.15 -90.28 -0.19 -1.83 16 4 H 0.07 1.01 8.14 -51.93 -0.42 0.59 16 5 C 0.12 2.02 5.05 -3.48 -0.02 2.00 16 6 N -0.60 -9.52 2.97 -172.50 -0.51 -10.03 16 7 C 0.51 8.37 7.78 -10.99 -0.09 8.29 16 8 O -0.53 -10.66 15.91 -14.35 -0.23 -10.89 16 9 C 0.05 0.57 4.58 36.01 0.16 0.73 16 10 O -0.35 -4.79 9.53 -55.14 -0.53 -5.31 16 11 C 0.09 0.86 2.70 -26.55 -0.07 0.79 16 12 C -0.18 -1.64 5.76 -26.59 -0.15 -1.79 16 13 C 0.06 0.50 6.84 37.20 0.25 0.75 16 14 O -0.38 -3.64 10.77 -35.23 -0.38 -4.02 16 15 C 0.06 0.48 6.84 37.20 0.25 0.73 16 16 C -0.15 -1.35 5.79 -26.59 -0.15 -1.50 16 17 C 0.11 1.67 6.08 -3.71 -0.02 1.64 16 18 C -0.15 -2.32 5.78 -26.61 -0.15 -2.48 16 19 C 0.18 3.19 2.53 -67.89 -0.17 3.01 16 20 H 0.05 0.95 8.08 -51.93 -0.42 0.53 16 21 N -0.72 -15.95 3.72 -53.38 -0.20 -16.15 16 22 C -0.24 -6.00 9.93 -15.06 -0.15 -6.15 16 23 H 0.07 1.74 7.83 -52.49 -0.41 1.33 16 24 C -0.01 -0.32 5.50 -17.43 -0.10 -0.41 16 25 N -0.93 -26.56 13.06 55.49 0.72 -25.84 16 26 Si 0.90 21.38 29.55 -169.99 -5.02 16.35 16 27 H -0.28 -6.46 7.11 56.52 0.40 -6.05 16 28 H -0.29 -7.02 7.11 56.52 0.40 -6.62 16 29 H -0.29 -7.07 7.11 56.52 0.40 -6.67 16 30 H 0.05 0.64 8.14 -51.93 -0.42 0.21 16 31 H 0.05 0.75 6.70 -51.93 -0.35 0.40 16 32 H 0.05 0.61 8.14 -51.93 -0.42 0.19 16 33 H 0.06 0.97 8.14 -51.93 -0.42 0.54 16 34 H 0.08 1.41 7.70 -51.93 -0.40 1.01 16 35 H 0.08 1.41 6.63 -51.93 -0.34 1.07 16 36 H 0.09 1.49 5.73 -51.93 -0.30 1.19 16 37 H 0.08 0.79 7.64 -51.93 -0.40 0.39 16 38 H 0.08 0.84 7.79 -51.93 -0.40 0.43 16 39 H 0.06 0.51 7.79 -51.93 -0.40 0.11 16 40 H 0.08 0.88 8.14 -51.93 -0.42 0.45 16 41 H 0.08 0.65 7.99 -51.93 -0.42 0.23 16 42 H 0.05 0.34 8.14 -51.92 -0.42 -0.09 16 43 H 0.10 0.65 8.14 -51.93 -0.42 0.22 16 44 H 0.05 0.32 8.14 -51.93 -0.42 -0.10 16 45 H 0.10 0.59 8.14 -51.93 -0.42 0.17 16 46 H 0.08 0.66 8.14 -51.93 -0.42 0.24 16 47 H 0.08 0.84 8.14 -51.93 -0.42 0.42 16 48 H 0.07 0.77 5.93 -51.93 -0.31 0.46 16 49 H 0.09 1.54 7.74 -51.93 -0.40 1.14 16 50 H 0.05 0.67 8.14 -51.93 -0.42 0.25 16 51 H 0.07 1.22 8.14 -51.93 -0.42 0.80 16 52 H 0.38 9.21 5.93 -40.82 -0.24 8.97 16 53 H 0.25 7.12 8.31 -40.82 -0.34 6.78 16 LS Contribution 406.65 15.07 6.13 6.13 Total: -1.00 -31.16 406.65 -9.81 -40.98 By element: Atomic # 1 Polarization: 18.03 SS G_CDS: -9.42 Total: 8.60 kcal Atomic # 6 Polarization: 0.55 SS G_CDS: -0.37 Total: 0.17 kcal Atomic # 7 Polarization: -52.04 SS G_CDS: 0.01 Total: -52.02 kcal Atomic # 8 Polarization: -19.08 SS G_CDS: -1.13 Total: -20.21 kcal Atomic # 14 Polarization: 21.38 SS G_CDS: -5.02 Total: 16.35 kcal Total LS contribution 6.13 Total: 6.13 kcal Total: -31.16 -9.81 -40.98 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. ZINC001037928303.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 -83.956 kcal (2) G-P(sol) polarization free energy of solvation -31.163 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -115.119 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -9.813 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -40.976 kcal (6) G-S(sol) free energy of system = (1) + (5) -124.932 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.84 seconds