Wall clock time and date at job start Tue Mar 31 2020 21:25:56 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 N 1.46497 * 109.47311 * 2 1 4 4 C 1.34774 * 119.99906 * 89.99590 * 3 2 1 5 5 O 1.21278 * 119.99979 * 0.02562 * 4 3 2 6 6 C 1.50701 * 120.00120 * 179.97438 * 4 3 2 7 7 H 1.09004 * 115.56816 * 325.68831 * 6 4 3 8 8 C 1.53037 * 117.50098 * 111.39535 * 6 4 3 9 9 C 1.52842 * 59.98603 * 107.49419 * 8 6 4 10 10 C 1.53179 * 117.65923 * 252.26592 * 9 8 6 11 11 C 1.53343 * 108.77228 * 269.98212 * 10 9 8 12 12 N 1.46839 * 108.81588 * 308.69141 * 11 10 9 13 13 C 1.34781 * 120.38678 * 236.92252 * 12 11 10 14 14 O 1.21279 * 120.00465 * 179.97438 * 13 12 11 15 15 C 1.50706 * 119.99643 * 359.97438 * 13 12 11 16 16 C 1.50698 * 109.47073 * 179.97438 * 15 13 12 17 17 H 1.08003 * 119.99878 * 359.97438 * 16 15 13 18 18 C 1.37880 * 120.00376 * 180.02562 * 16 15 13 19 19 N 1.31514 * 119.99203 * 359.97438 * 18 16 15 20 20 Si 1.86796 * 120.00268 * 180.02562 * 18 16 15 21 21 H 1.48497 * 109.47283 * 89.99874 * 20 18 16 22 22 H 1.48505 * 109.46588 * 209.99705 * 20 18 16 23 23 H 1.48496 * 109.46985 * 329.99309 * 20 18 16 24 24 C 1.46847 * 119.23590 * 56.89579 * 12 11 10 25 25 C 1.53187 * 117.65413 * 107.69799 * 9 8 6 26 26 C 1.46505 * 120.00336 * 270.00257 * 3 2 1 27 27 C 1.53001 * 109.46611 * 300.00194 * 26 3 2 28 28 C 1.53002 * 109.46964 * 59.99512 * 26 3 2 29 29 H 1.08996 * 109.46936 * 300.00171 * 1 2 3 30 30 H 1.09007 * 109.47204 * 59.99727 * 1 2 3 31 31 H 1.09005 * 109.47254 * 179.97438 * 1 2 3 32 32 H 1.09005 * 109.46691 * 239.99862 * 2 1 3 33 33 H 1.08993 * 109.47158 * 120.00424 * 2 1 3 34 34 H 1.09002 * 117.50526 * 0.02562 * 8 6 4 35 35 H 1.09002 * 117.50396 * 214.98749 * 8 6 4 36 36 H 1.09000 * 109.58451 * 29.77190 * 10 9 8 37 37 H 1.09007 * 109.58681 * 150.18987 * 10 9 8 38 38 H 1.09001 * 109.57891 * 188.89502 * 11 10 9 39 39 H 1.08998 * 109.69239 * 68.55969 * 11 10 9 40 40 H 1.08991 * 109.47351 * 300.00183 * 15 13 12 41 41 H 1.08997 * 109.46826 * 60.00387 * 15 13 12 42 42 H 0.97007 * 119.99756 * 180.02562 * 19 18 16 43 43 H 1.08994 * 109.58457 * 183.29379 * 24 12 11 44 44 H 1.09010 * 109.68398 * 62.96367 * 24 12 11 45 45 H 1.09000 * 109.58738 * 209.80070 * 25 9 8 46 46 H 1.08999 * 109.58670 * 330.23262 * 25 9 8 47 47 H 1.08996 * 109.47509 * 179.97438 * 26 3 2 48 48 H 1.08996 * 109.47470 * 59.99626 * 27 26 3 49 49 H 1.08998 * 109.46816 * 179.97438 * 27 26 3 50 50 H 1.09002 * 109.46838 * 299.99437 * 27 26 3 51 51 H 1.09000 * 109.47029 * 60.00282 * 28 26 3 52 52 H 1.08998 * 109.46940 * 180.02562 * 28 26 3 53 53 H 1.08996 * 109.47280 * 300.00473 * 28 26 3 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 7 2.0184 1.3812 0.0000 4 6 2.2430 2.0165 1.1672 5 8 2.0412 1.4446 2.2175 6 6 2.7459 3.4371 1.1672 7 1 3.4256 3.6956 0.3552 8 6 1.7902 4.5251 1.6621 9 6 2.9804 4.1035 2.5233 10 6 2.6910 3.2799 3.7820 11 6 2.4731 4.2379 4.9593 12 7 3.5984 5.1794 5.0184 13 6 4.3407 5.2852 6.1384 14 8 5.2689 6.0647 6.1794 15 6 4.0173 4.4348 7.3398 16 6 4.9894 4.7425 8.4495 17 1 5.7643 5.4798 8.2995 18 6 4.8904 4.0820 9.6557 19 7 3.9472 3.1839 9.8380 20 14 6.0950 4.4640 11.0314 21 1 5.5547 5.5628 11.8715 22 1 6.2918 3.2525 11.8674 23 1 7.3959 4.8800 10.4488 24 6 3.9062 6.0039 3.8429 25 6 4.1533 5.0816 2.6429 26 6 2.2626 2.0719 -1.2687 27 6 3.3171 1.3069 -2.0710 28 6 0.9615 2.1398 -2.0710 29 1 -0.3633 0.5138 0.8899 30 1 -0.3634 0.5139 -0.8900 31 1 -0.3634 -1.0277 -0.0005 32 1 1.8933 -0.5139 -0.8900 33 1 1.8933 -0.5139 0.8899 34 1 0.7978 4.2133 1.9880 35 1 1.8408 5.4991 1.1753 36 1 1.7940 2.6802 3.6280 37 1 3.5377 2.6269 3.9940 38 1 2.4231 3.6697 5.8882 39 1 1.5432 4.7886 4.8175 40 1 3.0028 4.6501 7.6750 41 1 4.0952 3.3814 7.0708 42 1 3.8772 2.7194 10.6868 43 1 4.7991 6.5980 4.0370 44 1 3.0668 6.6655 3.6285 45 1 5.0787 4.5258 2.7937 46 1 4.2265 5.6774 1.7331 47 1 2.6194 3.0824 -1.0696 48 1 2.9599 0.2966 -2.2702 49 1 3.4985 1.8205 -3.0152 50 1 4.2440 1.2585 -1.4994 51 1 0.2102 2.6847 -1.4994 52 1 1.1433 2.6533 -3.0151 53 1 0.6043 1.1295 -2.2702 RHF calculation, no. of doubly occupied orbitals= 65 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 ZINC001269024705.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 21:25:56 Heat of formation + Delta-G solvation = -47.655011 kcal Electronic energy + Delta-G solvation = -30406.959990 eV Core-core repulsion = 26472.387307 eV Total energy + Delta-G solvation = -3934.572683 eV No. of doubly occupied orbitals = 65 Molecular weight (most abundant/longest-lived isotopes) = 336.220 amu Computer time = 0.84 seconds Orbital eigenvalues (eV) -40.89162 -39.35031 -37.93526 -36.75683 -34.77992 -32.92661 -32.81571 -31.19150 -30.88853 -29.51339 -28.41496 -27.71662 -25.08308 -24.19717 -23.27433 -22.78973 -22.49783 -21.86439 -19.66243 -18.83344 -17.82308 -17.62859 -16.52655 -16.19144 -15.62757 -15.58462 -15.17587 -14.84579 -14.74643 -14.51896 -14.27390 -14.04168 -13.86344 -13.69472 -13.44265 -13.29268 -13.11148 -12.82191 -12.68527 -12.66497 -12.55527 -12.29926 -12.09495 -11.92404 -11.82820 -11.70552 -11.54263 -11.24402 -11.10703 -11.04356 -11.00868 -10.70444 -10.56159 -10.55436 -10.06208 -9.87920 -9.85733 -9.49083 -9.11977 -8.96596 -8.50904 -8.36693 -7.92407 -5.98428 -3.97549 2.35780 2.66146 3.39628 3.44450 3.51641 3.62443 3.76890 3.83091 4.16236 4.29825 4.53449 4.55783 4.57743 4.64731 4.73819 4.78577 4.87740 4.98757 5.03924 5.07064 5.12962 5.19533 5.31946 5.33418 5.39245 5.40225 5.43961 5.47528 5.53301 5.55602 5.61709 5.65051 5.71484 5.77463 5.80537 5.88327 5.95594 5.96549 6.00976 6.17295 6.27418 6.30672 6.36049 6.56321 6.64915 7.15451 7.18667 7.33332 7.41900 8.03647 8.08054 8.09546 8.47194 9.12850 9.31064 9.66984 11.13992 Molecular weight = 336.22amu Principal moments of inertia in cm(-1) A = 0.019469 B = 0.002457 C = 0.002301 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1437.831020 B =11391.341693 C =12166.251646 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C -0.173 4.173 2 C 0.110 3.890 3 N -0.607 5.607 4 C 0.545 3.455 5 O -0.523 6.523 6 C -0.194 4.194 7 H 0.120 0.880 8 C -0.143 4.143 9 C -0.075 4.075 10 C -0.098 4.098 11 C 0.111 3.889 12 N -0.627 5.627 13 C 0.517 3.483 14 O -0.549 6.549 15 C 0.007 3.993 16 C -0.507 4.507 17 H 0.074 0.926 18 C 0.054 3.946 19 N -0.901 5.901 20 Si 0.900 3.100 21 H -0.280 1.280 22 H -0.287 1.287 23 H -0.272 1.272 24 C 0.116 3.884 25 C -0.097 4.097 26 C 0.127 3.873 27 C -0.166 4.166 28 C -0.165 4.165 29 H 0.059 0.941 30 H 0.060 0.940 31 H 0.062 0.938 32 H 0.074 0.926 33 H 0.083 0.917 34 H 0.099 0.901 35 H 0.102 0.898 36 H 0.101 0.899 37 H 0.070 0.930 38 H 0.097 0.903 39 H 0.058 0.942 40 H 0.047 0.953 41 H 0.048 0.952 42 H 0.261 0.739 43 H 0.090 0.910 44 H 0.057 0.943 45 H 0.072 0.928 46 H 0.069 0.931 47 H 0.096 0.904 48 H 0.060 0.940 49 H 0.068 0.932 50 H 0.060 0.940 51 H 0.061 0.939 52 H 0.066 0.934 53 H 0.063 0.937 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -8.833 -3.701 -29.197 30.727 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 -0.231 4.231 2 C -0.012 4.012 3 N -0.341 5.341 4 C 0.334 3.666 5 O -0.399 6.399 6 C -0.215 4.215 7 H 0.138 0.862 8 C -0.181 4.181 9 C -0.075 4.075 10 C -0.136 4.136 11 C -0.013 4.013 12 N -0.363 5.363 13 C 0.309 3.691 14 O -0.426 6.426 15 C -0.032 4.032 16 C -0.545 4.545 17 H 0.092 0.908 18 C -0.147 4.147 19 N -0.540 5.540 20 Si 0.728 3.272 21 H -0.207 1.207 22 H -0.213 1.213 23 H -0.197 1.197 24 C -0.008 4.008 25 C -0.135 4.135 26 C 0.024 3.976 27 C -0.224 4.224 28 C -0.223 4.223 29 H 0.078 0.922 30 H 0.079 0.921 31 H 0.081 0.919 32 H 0.092 0.908 33 H 0.102 0.898 34 H 0.117 0.883 35 H 0.121 0.879 36 H 0.119 0.881 37 H 0.089 0.911 38 H 0.115 0.885 39 H 0.076 0.924 40 H 0.064 0.936 41 H 0.066 0.934 42 H 0.070 0.930 43 H 0.108 0.892 44 H 0.075 0.925 45 H 0.091 0.909 46 H 0.088 0.912 47 H 0.114 0.886 48 H 0.079 0.921 49 H 0.087 0.913 50 H 0.080 0.920 51 H 0.080 0.920 52 H 0.085 0.915 53 H 0.082 0.918 Dipole moment (debyes) X Y Z Total from point charges -8.492 -3.722 -28.448 29.921 hybrid contribution 0.477 -0.016 0.357 0.596 sum -8.015 -3.738 -28.091 29.451 Atomic orbital electron populations 1.22299 0.95960 1.02169 1.02640 1.21356 0.94365 0.82491 1.03012 1.48066 1.66316 1.14089 1.05666 1.19787 0.76607 0.87161 0.83049 1.90682 1.51679 1.67304 1.30280 1.22365 1.06005 0.91715 1.01410 0.86186 1.23061 0.95373 0.97006 1.02620 1.21532 0.96962 0.98535 0.90521 1.21836 1.04420 0.96323 0.91032 1.21743 0.88419 0.91059 1.00041 1.48329 1.32878 1.41489 1.13599 1.22043 0.80343 0.82823 0.83890 1.90506 1.30163 1.39073 1.82826 1.19235 0.99214 0.95089 0.89656 1.21194 1.14441 1.22473 0.96418 0.90776 1.25008 0.95916 0.95050 0.98679 1.69966 1.33009 1.26035 1.25033 0.86443 0.81588 0.77567 0.81571 1.20653 1.21308 1.19719 1.21319 1.01672 0.92939 0.84844 1.21587 0.96780 0.96634 0.98536 1.21225 0.95602 0.97096 0.83713 1.22195 0.98959 1.00985 1.00246 1.22286 0.97315 1.02611 1.00041 0.92160 0.92094 0.91873 0.90773 0.89823 0.88292 0.87924 0.88079 0.91085 0.88511 0.92410 0.93558 0.93441 0.92965 0.89199 0.92455 0.90912 0.91233 0.88597 0.92121 0.91314 0.92040 0.92039 0.91544 0.91829 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 -0.17 -1.27 9.96 37.16 0.37 -0.90 16 2 C 0.11 0.88 5.55 -4.04 -0.02 0.86 16 3 N -0.61 -5.21 2.40 -166.11 -0.40 -5.61 16 4 C 0.55 6.26 7.44 -10.99 -0.08 6.18 16 5 O -0.52 -7.89 12.63 5.56 0.07 -7.82 16 6 C -0.19 -1.91 4.74 -91.80 -0.44 -2.35 16 7 H 0.12 0.95 6.64 -51.93 -0.35 0.60 16 8 C -0.14 -1.34 9.64 -26.79 -0.26 -1.60 16 9 C -0.07 -0.90 1.94 -154.45 -0.30 -1.20 16 10 C -0.10 -1.47 4.46 -26.46 -0.12 -1.59 16 11 C 0.11 1.82 6.35 -3.68 -0.02 1.79 16 12 N -0.63 -11.79 2.92 -172.71 -0.50 -12.30 16 13 C 0.52 12.47 7.68 -10.98 -0.08 12.38 16 14 O -0.55 -14.85 14.84 5.56 0.08 -14.77 16 15 C 0.01 0.19 3.79 -29.03 -0.11 0.08 16 16 C -0.51 -15.22 8.92 -34.44 -0.31 -15.52 16 17 H 0.07 2.32 6.75 -52.48 -0.35 1.96 16 18 C 0.05 1.59 5.46 -17.82 -0.10 1.50 16 19 N -0.90 -27.12 13.29 55.43 0.74 -26.38 16 20 Si 0.90 22.74 29.54 -169.99 -5.02 17.72 16 21 H -0.28 -6.95 7.11 56.52 0.40 -6.55 16 22 H -0.29 -7.08 7.11 56.52 0.40 -6.67 16 23 H -0.27 -6.87 7.11 56.52 0.40 -6.47 16 24 C 0.12 1.77 6.44 -3.67 -0.02 1.75 16 25 C -0.10 -1.20 5.83 -26.45 -0.15 -1.36 16 26 C 0.13 0.75 3.16 -67.93 -0.21 0.53 16 27 C -0.17 -0.83 9.17 37.16 0.34 -0.49 16 28 C -0.16 -0.78 8.14 37.16 0.30 -0.48 16 29 H 0.06 0.57 8.14 -51.93 -0.42 0.15 16 30 H 0.06 0.38 5.44 -51.93 -0.28 0.10 16 31 H 0.06 0.39 8.14 -51.93 -0.42 -0.03 16 32 H 0.07 0.45 6.43 -51.93 -0.33 0.12 16 33 H 0.08 0.84 7.42 -51.93 -0.39 0.46 16 34 H 0.10 0.97 8.14 -51.93 -0.42 0.55 16 35 H 0.10 0.77 8.14 -51.93 -0.42 0.34 16 36 H 0.10 1.55 5.70 -51.93 -0.30 1.25 16 37 H 0.07 1.23 8.14 -51.93 -0.42 0.80 16 38 H 0.10 1.76 5.86 -51.93 -0.30 1.45 16 39 H 0.06 0.84 8.14 -51.93 -0.42 0.42 16 40 H 0.05 1.25 7.87 -51.93 -0.41 0.84 16 41 H 0.05 1.29 7.74 -51.93 -0.40 0.89 16 42 H 0.26 7.42 8.31 -40.82 -0.34 7.08 16 43 H 0.09 1.53 6.96 -51.93 -0.36 1.17 16 44 H 0.06 0.77 8.14 -51.92 -0.42 0.35 16 45 H 0.07 1.02 8.14 -51.93 -0.42 0.60 16 46 H 0.07 0.66 8.10 -51.93 -0.42 0.24 16 47 H 0.10 0.53 5.43 -51.93 -0.28 0.25 16 48 H 0.06 0.29 6.66 -51.93 -0.35 -0.05 16 49 H 0.07 0.25 8.14 -51.93 -0.42 -0.17 16 50 H 0.06 0.37 8.14 -51.93 -0.42 -0.05 16 51 H 0.06 0.34 8.14 -51.93 -0.42 -0.08 16 52 H 0.07 0.23 8.14 -51.93 -0.42 -0.19 16 53 H 0.06 0.30 6.17 -51.93 -0.32 -0.02 16 LS Contribution 404.81 15.07 6.10 6.10 Total: -1.00 -34.95 404.81 -9.20 -44.15 By element: Atomic # 1 Polarization: 8.37 SS G_CDS: -9.05 Total: -0.68 kcal Atomic # 6 Polarization: 0.81 SS G_CDS: -1.22 Total: -0.41 kcal Atomic # 7 Polarization: -44.13 SS G_CDS: -0.17 Total: -44.30 kcal Atomic # 8 Polarization: -22.74 SS G_CDS: 0.15 Total: -22.59 kcal Atomic # 14 Polarization: 22.74 SS G_CDS: -5.02 Total: 17.72 kcal Total LS contribution 6.10 Total: 6.10 kcal Total: -34.95 -9.20 -44.15 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. ZINC001269024705.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 -3.503 kcal (2) G-P(sol) polarization free energy of solvation -34.950 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -38.453 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -9.202 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -44.152 kcal (6) G-S(sol) free energy of system = (1) + (5) -47.655 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.84 seconds