Wall clock time and date at job start Sat Apr 11 2020 06:13:10 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 N 1.46503 * 1 3 3 C 1.34775 * 120.00213 * 2 1 4 4 O 1.21586 * 119.99952 * 0.02562 * 3 2 1 5 5 N 1.34771 * 120.00045 * 179.97438 * 3 2 1 6 6 C 1.46503 * 120.00191 * 180.02562 * 5 3 2 7 7 C 1.52999 * 109.46717 * 60.66510 * 6 5 3 8 8 C 1.53005 * 109.46842 * 300.67078 * 6 5 3 9 9 C 1.50693 * 109.47375 * 180.66759 * 6 5 3 10 10 O 1.21283 * 120.00297 * 140.44513 * 9 6 5 11 11 N 1.34781 * 120.00150 * 320.44846 * 9 6 5 12 12 C 1.46928 * 120.62619 * 355.52192 * 11 9 6 13 13 C 1.53161 * 108.76476 * 233.63010 * 12 11 9 14 14 C 1.53037 * 109.32980 * 305.35668 * 13 12 11 15 15 H 1.08996 * 109.46391 * 301.35962 * 14 13 12 16 16 C 1.53001 * 109.46284 * 181.38507 * 14 13 12 17 17 C 1.53044 * 109.52621 * 61.37632 * 14 13 12 18 18 H 1.08994 * 109.49654 * 58.62339 * 17 14 13 19 19 C 1.52995 * 109.49734 * 178.69112 * 17 14 13 20 20 N 1.46503 * 109.47094 * 184.99713 * 19 17 14 21 21 C 1.36935 * 120.00025 * 179.97438 * 20 19 17 22 22 H 1.07999 * 120.00150 * 359.97438 * 21 20 19 23 23 C 1.38812 * 120.00165 * 180.02562 * 21 20 19 24 24 N 1.31616 * 120.00379 * 180.02562 * 23 21 20 25 25 Si 1.86808 * 119.99784 * 359.97438 * 23 21 20 26 26 H 1.48498 * 109.47054 * 90.00339 * 25 23 21 27 27 H 1.48498 * 109.47064 * 210.00318 * 25 23 21 28 28 H 1.48501 * 109.46855 * 330.00103 * 25 23 21 29 29 C 1.46920 * 120.63075 * 175.54673 * 11 9 6 30 30 H 1.09002 * 109.47028 * 299.99674 * 1 2 3 31 31 H 1.09002 * 109.47297 * 59.99513 * 1 2 3 32 32 H 1.09001 * 109.47381 * 179.97438 * 1 2 3 33 33 H 0.97002 * 119.99544 * 179.97438 * 2 1 3 34 34 H 0.96998 * 120.00167 * 0.02562 * 5 3 2 35 35 H 1.09010 * 109.46716 * 180.02562 * 7 6 5 36 36 H 1.08999 * 109.47737 * 300.00068 * 7 6 5 37 37 H 1.09003 * 109.46981 * 60.00734 * 7 6 5 38 38 H 1.09004 * 109.47134 * 299.99455 * 8 6 5 39 39 H 1.08999 * 109.47363 * 60.00086 * 8 6 5 40 40 H 1.09001 * 109.46501 * 179.97438 * 8 6 5 41 41 H 1.09001 * 109.58928 * 353.41846 * 12 11 9 42 42 H 1.09002 * 109.58404 * 113.69992 * 12 11 9 43 43 H 1.09005 * 109.47644 * 185.40638 * 13 12 11 44 44 H 1.09000 * 109.50415 * 65.32128 * 13 12 11 45 45 H 1.09001 * 109.46964 * 299.97795 * 16 14 13 46 46 H 1.09008 * 109.47004 * 59.96990 * 16 14 13 47 47 H 1.08996 * 109.47438 * 179.97438 * 16 14 13 48 48 H 1.09004 * 109.47297 * 304.99756 * 19 17 14 49 49 H 1.09001 * 109.47408 * 64.99867 * 19 17 14 50 50 H 0.96999 * 119.99747 * 359.97438 * 20 19 17 51 51 H 0.97000 * 120.00538 * 179.97438 * 24 23 21 52 52 H 1.09000 * 109.58724 * 6.58034 * 29 11 9 53 53 H 1.09010 * 109.58531 * 246.15344 * 29 11 9 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 7 1.4650 0.0000 0.0000 3 6 2.1389 1.1672 0.0000 4 8 1.5310 2.2201 0.0005 5 7 3.4867 1.1671 0.0005 6 6 4.2192 2.4358 0.0011 7 6 3.8617 3.2305 1.2587 8 6 3.8375 3.2457 -1.2397 9 6 5.7007 2.1605 -0.0150 10 8 6.4385 2.8499 -0.6868 11 7 6.2060 1.1480 0.7173 12 6 5.3408 0.3664 1.6113 13 6 5.9530 0.3681 3.0152 14 6 7.3962 -0.1355 2.9390 15 1 7.4086 -1.1397 2.5154 16 6 7.9997 -0.1677 4.3446 17 6 8.2190 0.8021 2.0524 18 1 8.1871 1.8115 2.4623 19 6 9.6690 0.3165 2.0031 20 7 10.4809 1.2783 1.2533 21 6 11.8201 1.0535 1.0773 22 1 12.2780 0.1675 1.4916 23 6 12.5895 1.9651 0.3673 24 7 13.8767 1.7488 0.1978 25 14 11.7976 3.4980 -0.3487 26 1 11.8595 4.5982 0.6468 27 1 12.5247 3.9022 -1.5789 28 1 10.3793 3.2123 -0.6833 29 6 7.6325 0.8055 0.6372 30 1 -0.3633 0.5138 0.8900 31 1 -0.3634 0.5139 -0.8899 32 1 -0.3634 -1.0277 -0.0005 33 1 1.9500 -0.8401 0.0004 34 1 3.9716 0.3271 0.0005 35 1 4.4065 4.1747 1.2589 36 1 2.7902 3.4297 1.2703 37 1 4.1337 2.6536 2.1426 38 1 4.0922 2.6795 -2.1356 39 1 2.7659 3.4449 -1.2280 40 1 4.3822 4.1898 -1.2389 41 1 4.3484 0.8161 1.6447 42 1 5.2658 -0.6572 1.2441 43 1 5.3730 -0.2869 3.6654 44 1 5.9421 1.3817 3.4157 45 1 7.9874 0.8364 4.7684 46 1 7.4140 -0.8358 4.9762 47 1 9.0274 -0.5268 4.2906 48 1 10.0569 0.2267 3.0178 49 1 9.7102 -0.6553 1.5110 50 1 10.0697 2.0743 0.8815 51 1 14.4142 2.3856 -0.2987 52 1 8.1522 1.5450 0.0280 53 1 7.7464 -0.1831 0.1921 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 ZINC001133332871.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 06:13:10 Heat of formation + Delta-G solvation = -34.216287 kcal Electronic energy + Delta-G solvation = -32205.522465 eV Core-core repulsion = 28113.369228 eV Total energy + Delta-G solvation = -4092.153237 eV No. of doubly occupied orbitals = 66 Molecular weight (most abundant/longest-lived isotopes) = 340.226 amu Computer time = 0.81 seconds Orbital eigenvalues (eV) -41.48583 -39.90235 -38.32611 -36.31174 -35.20492 -34.74012 -33.82199 -31.95986 -31.70935 -30.30153 -28.46493 -27.48815 -26.92605 -26.08046 -24.24768 -23.15819 -22.57668 -21.22318 -20.92512 -20.09537 -19.57755 -18.56081 -17.82358 -17.35994 -16.29038 -15.86759 -15.79817 -15.41328 -15.05157 -14.87924 -14.71291 -14.48459 -14.12156 -14.02563 -13.79665 -13.53721 -13.45624 -13.20623 -12.99751 -12.77583 -12.66566 -12.62875 -12.46416 -12.21971 -12.03430 -11.97972 -11.86418 -11.68372 -11.51987 -11.30082 -11.03750 -10.91082 -10.69805 -10.48633 -10.39202 -10.18985 -10.04373 -9.70590 -9.61002 -9.53655 -9.21137 -8.88328 -8.70844 -7.19800 -5.73921 -3.09515 2.05874 2.60363 2.76894 2.83938 3.44698 3.51534 3.53763 3.78751 4.09185 4.50169 4.63997 4.64506 4.68095 4.71996 4.78022 4.81493 4.96182 5.05312 5.13194 5.19134 5.34188 5.41357 5.45173 5.47411 5.52041 5.55590 5.57530 5.59605 5.65922 5.71623 5.72991 5.79986 5.80623 5.90294 5.96095 6.05399 6.06404 6.10834 6.18838 6.21100 6.30147 6.31999 6.41096 6.45054 6.68810 6.74278 7.23244 7.55890 7.98811 8.01382 8.21260 8.44965 9.24100 9.97031 10.16074 11.44236 Molecular weight = 340.23amu Principal moments of inertia in cm(-1) A = 0.015292 B = 0.003193 C = 0.002799 Principal moments of inertia in units of 10**(-40)*gram-cm**2 A = 1830.541727 B = 8766.031716 C =10001.422614 Net atomic charges, atomic populations, and dipole contributions calculated with CM2 Atom NO. Type Charge No. of electrons 1 C 0.107 3.893 2 N -0.751 5.751 3 C 0.705 3.295 4 O -0.579 6.579 5 N -0.741 5.741 6 C 0.182 3.818 7 C -0.163 4.163 8 C -0.150 4.150 9 C 0.514 3.486 10 O -0.517 6.517 11 N -0.608 5.608 12 C 0.078 3.922 13 C -0.127 4.127 14 C -0.083 4.083 15 H 0.073 0.927 16 C -0.149 4.149 17 C -0.106 4.106 18 H 0.074 0.926 19 C 0.163 3.837 20 N -0.757 5.757 21 C -0.245 4.245 22 H 0.090 0.910 23 C 0.006 3.994 24 N -0.934 5.934 25 Si 0.879 3.121 26 H -0.285 1.285 27 H -0.291 1.291 28 H -0.272 1.272 29 C 0.116 3.884 30 H 0.059 0.941 31 H 0.058 0.942 32 H 0.075 0.925 33 H 0.397 0.603 34 H 0.401 0.599 35 H 0.072 0.928 36 H 0.092 0.908 37 H 0.061 0.939 38 H 0.057 0.943 39 H 0.087 0.913 40 H 0.075 0.925 41 H 0.106 0.894 42 H 0.068 0.932 43 H 0.074 0.926 44 H 0.068 0.932 45 H 0.053 0.947 46 H 0.050 0.950 47 H 0.067 0.933 48 H 0.036 0.964 49 H 0.026 0.974 50 H 0.362 0.638 51 H 0.259 0.741 52 H 0.099 0.901 53 H 0.071 0.929 For the charges calculated by CM2: Dipole moment (debyes) X Y Z Total from point charges -29.255 -7.288 4.446 30.475 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 -0.037 4.037 2 N -0.407 5.407 3 C 0.405 3.595 4 O -0.457 6.457 5 N -0.402 5.402 6 C 0.092 3.908 7 C -0.221 4.221 8 C -0.208 4.208 9 C 0.299 3.701 10 O -0.391 6.391 11 N -0.341 5.341 12 C -0.045 4.045 13 C -0.166 4.166 14 C -0.102 4.102 15 H 0.091 0.909 16 C -0.206 4.206 17 C -0.126 4.126 18 H 0.092 0.908 19 C 0.035 3.965 20 N -0.403 5.403 21 C -0.374 4.374 22 H 0.107 0.893 23 C -0.190 4.190 24 N -0.582 5.582 25 Si 0.709 3.291 26 H -0.211 1.211 27 H -0.217 1.217 28 H -0.198 1.198 29 C -0.006 4.006 30 H 0.077 0.923 31 H 0.077 0.923 32 H 0.093 0.907 33 H 0.230 0.770 34 H 0.238 0.762 35 H 0.091 0.909 36 H 0.111 0.889 37 H 0.080 0.920 38 H 0.076 0.924 39 H 0.106 0.894 40 H 0.094 0.906 41 H 0.124 0.876 42 H 0.086 0.914 43 H 0.093 0.907 44 H 0.086 0.914 45 H 0.072 0.928 46 H 0.069 0.931 47 H 0.086 0.914 48 H 0.054 0.946 49 H 0.044 0.956 50 H 0.195 0.805 51 H 0.069 0.931 52 H 0.117 0.883 53 H 0.089 0.911 Dipole moment (debyes) X Y Z Total from point charges -29.191 -6.031 4.065 30.084 hybrid contribution 0.155 0.162 -0.508 0.556 sum -29.036 -5.869 3.557 29.836 Atomic orbital electron populations 1.21402 0.77927 1.02034 1.02373 1.44967 1.07887 1.07108 1.80714 1.15921 0.81441 0.84422 0.77677 1.90885 1.67799 1.29874 1.57113 1.45833 1.05026 1.09272 1.80091 1.20381 0.87002 0.84271 0.99117 1.22296 1.04922 1.00170 0.94733 1.22075 1.03785 1.00201 0.94784 1.20525 0.89684 0.80285 0.79586 1.90786 1.59912 1.46852 1.41551 1.48249 1.10329 1.32770 1.42795 1.22430 0.95528 0.96091 0.90487 1.21972 0.96567 1.02315 0.95709 1.21080 0.93650 0.99204 0.96300 0.90892 1.21890 1.01559 1.01726 0.95438 1.21771 0.96193 1.00145 0.94443 0.90756 1.20704 0.87120 0.92841 0.95790 1.42775 1.07054 1.24803 1.65628 1.19022 0.82709 1.06744 1.28955 0.89253 1.24652 0.95378 0.98491 1.00439 1.69699 1.04902 1.37469 1.46162 0.86621 0.79095 0.84401 0.78961 1.21125 1.21697 1.19812 1.21802 0.78746 1.02067 0.97950 0.92255 0.92318 0.90660 0.76980 0.76154 0.90913 0.88887 0.91979 0.92384 0.89419 0.90609 0.87646 0.91379 0.90710 0.91364 0.92752 0.93101 0.91435 0.94637 0.95572 0.80536 0.93080 0.88320 0.91066 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 0.11 0.51 10.70 59.85 0.64 1.16 16 2 N -0.75 -4.34 5.72 -72.07 -0.41 -4.75 16 3 C 0.71 6.50 7.98 -86.92 -0.69 5.81 16 4 O -0.58 -7.31 12.55 5.29 0.07 -7.24 16 5 N -0.74 -6.30 3.23 -53.50 -0.17 -6.47 16 6 C 0.18 2.04 0.63 -132.97 -0.08 1.95 16 7 C -0.16 -1.72 8.15 37.16 0.30 -1.41 16 8 C -0.15 -1.83 7.86 37.16 0.29 -1.54 16 9 C 0.51 7.18 6.55 -10.99 -0.07 7.10 16 10 O -0.52 -9.61 15.45 5.55 0.09 -9.52 16 11 N -0.61 -7.32 2.93 -172.79 -0.51 -7.83 16 12 C 0.08 0.62 4.19 -3.73 -0.02 0.61 16 13 C -0.13 -1.07 5.36 -26.63 -0.14 -1.21 16 14 C -0.08 -0.88 2.23 -90.58 -0.20 -1.08 16 15 H 0.07 0.73 8.14 -51.93 -0.42 0.31 16 16 C -0.15 -1.56 8.82 37.16 0.33 -1.23 16 17 C -0.11 -1.54 1.92 -90.50 -0.17 -1.71 16 18 H 0.07 1.19 8.14 -51.93 -0.42 0.77 16 19 C 0.16 3.02 5.41 -4.04 -0.02 3.00 16 20 N -0.76 -18.11 5.18 -59.91 -0.31 -18.42 16 21 C -0.24 -7.00 10.47 -15.06 -0.16 -7.16 16 22 H 0.09 2.71 8.06 -52.49 -0.42 2.29 16 23 C 0.01 0.19 5.50 -17.43 -0.10 0.09 16 24 N -0.93 -29.87 13.97 55.49 0.78 -29.09 16 25 Si 0.88 23.19 27.74 -169.99 -4.71 18.48 16 26 H -0.28 -7.46 7.11 56.52 0.40 -7.06 16 27 H -0.29 -7.74 7.11 56.52 0.40 -7.34 16 28 H -0.27 -6.99 6.52 56.52 0.37 -6.62 16 29 C 0.12 1.73 5.53 -3.71 -0.02 1.71 16 30 H 0.06 0.33 8.14 -51.93 -0.42 -0.09 16 31 H 0.06 0.35 8.14 -51.93 -0.42 -0.08 16 32 H 0.07 0.15 8.14 -51.93 -0.42 -0.28 16 33 H 0.40 1.19 8.84 -40.82 -0.36 0.83 16 34 H 0.40 2.68 5.96 -40.82 -0.24 2.44 16 35 H 0.07 0.79 8.14 -51.92 -0.42 0.37 16 36 H 0.09 1.04 6.21 -51.93 -0.32 0.72 16 37 H 0.06 0.58 6.60 -51.93 -0.34 0.24 16 38 H 0.06 0.72 8.14 -51.93 -0.42 0.30 16 39 H 0.09 1.09 6.12 -51.93 -0.32 0.78 16 40 H 0.08 0.97 7.90 -51.93 -0.41 0.56 16 41 H 0.11 0.76 3.57 -51.93 -0.19 0.57 16 42 H 0.07 0.41 7.92 -51.93 -0.41 0.00 16 43 H 0.07 0.48 8.14 -51.93 -0.42 0.05 16 44 H 0.07 0.64 8.14 -51.93 -0.42 0.22 16 45 H 0.05 0.59 8.14 -51.93 -0.42 0.17 16 46 H 0.05 0.44 8.14 -51.92 -0.42 0.01 16 47 H 0.07 0.80 6.29 -51.93 -0.33 0.47 16 48 H 0.04 0.66 6.14 -51.93 -0.32 0.35 16 49 H 0.03 0.49 8.14 -51.93 -0.42 0.07 16 50 H 0.36 8.75 4.76 -40.82 -0.19 8.55 16 51 H 0.26 7.91 8.31 -40.82 -0.34 7.57 16 52 H 0.10 1.87 6.21 -51.93 -0.32 1.55 16 53 H 0.07 1.00 8.14 -51.92 -0.42 0.57 16 LS Contribution 397.53 15.07 5.99 5.99 Total: -1.00 -36.36 397.53 -8.16 -44.51 By element: Atomic # 1 Polarization: 17.13 SS G_CDS: -8.84 Total: 8.29 kcal Atomic # 6 Polarization: 6.18 SS G_CDS: -0.12 Total: 6.07 kcal Atomic # 7 Polarization: -65.94 SS G_CDS: -0.63 Total: -66.57 kcal Atomic # 8 Polarization: -16.92 SS G_CDS: 0.15 Total: -16.77 kcal Atomic # 14 Polarization: 23.19 SS G_CDS: -4.71 Total: 18.48 kcal Total LS contribution 5.99 Total: 5.99 kcal Total: -36.36 -8.16 -44.51 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. ZINC001133332871.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 10.297 kcal (2) G-P(sol) polarization free energy of solvation -36.356 kcal (3) G-ENP(sol) elect.-nuc.-pol. free energy of system -26.059 kcal (4) G-CDS(sol) cavity-dispersion-solvent structure free energy -8.157 kcal (5) G-P-CDS(sol) = G-P(sol) + G-CDS(sol) = (2) + (4) -44.513 kcal (6) G-S(sol) free energy of system = (1) + (5) -34.216 kcal 1SCF WAS SPECIFIED, SO GEOMETRY OPTIMIZATION WAS NOT USED Total computer time = 0.81 seconds